use axum::{
    Json,
    extract::{Extension, Path, State},
    http::StatusCode,
};
use base64::{
    Engine as _,
    engine::general_purpose::{STANDARD_NO_PAD, URL_SAFE_NO_PAD},
};
use hmac::{Hmac, Mac};
use platform_auth::hash_refresh_session_token;
use ring::{
    aead,
    rand::{SecureRandom, SystemRandom},
};
use serde::{Deserialize, Serialize};
use serde_json::{Value, json};
use sha2::{Digest, Sha256};
use shared_kernel::{build_prefixed_uuid_id, new_uuid_simple_string};
use spacetime_client::{
    ExternalApiKeyCreateRecordInput, ExternalApiKeyRecord, ExternalApiKeyRevokeRecordInput,
    LlmRouterAccountRecord, LlmRouterAccountUpsertRecordInput, SpacetimeClientError,
};
use std::collections::HashMap;
use std::sync::{Arc, OnceLock};
use tokio::sync::Mutex;

use crate::{
    api_response::json_success_body,
    auth::AuthenticatedAccessToken,
    config::{OFFICIAL_LLM_ROUTER_BASE_URL, OFFICIAL_LLM_ROUTER_MODEL},
    editor_project::current_utc_micros,
    http_error::AppError,
    request_context::RequestContext,
    state::AppState,
};

const EXTERNAL_API_KEY_ID_PREFIX: &str = "external-api-key-";
const EXTERNAL_API_KEY_SECRET_PREFIX: &str = "tnr_sk_";
const EXTERNAL_API_KEY_PREFIX_VISIBLE_CHARS: usize = 18;
const EXTERNAL_API_KEY_SCOPES: [&str; 4] = [
    "editor:project",
    "editor:canvas",
    "editor:image-generate",
    "editor:asset",
];
/// New API token 标识。它只用于在每个 Router 用户账号内定位同一个 Token，
/// 不承载产品展示语义；Router 用户本身通过完整 owner id 的稳定短哈希区分。
const LLM_ROUTER_TOKEN_IDENTIFIER: &str = "agc_auto_generate";
const LLM_ROUTER_USER_GROUP: &str = "taonier";
const LLM_ROUTER_TOKEN_GROUP: &str = "default";
const LLM_ROUTER_API_KEY_SCOPES: [&str; 1] = ["llm:responses"];
const LLM_ROUTER_SUBSCRIPTION_PLAN_ID: i64 = 1;
const LLM_ROUTER_SUBSCRIPTION_RENEWAL_THRESHOLD_SECONDS: i64 = 24 * 60 * 60;
const LLM_ROUTER_RECONCILIATION_ERROR_PREFIX: &str = "llm-router-reconciliation-required:";
const LLM_ROUTER_PROVISIONING_CREDENTIAL_VERSION: u32 = 1;
type HmacSha256 = Hmac<Sha256>;

static LLM_ROUTER_PROVISION_LOCKS: OnceLock<Mutex<HashMap<String, Arc<Mutex<()>>>>> =
    OnceLock::new();
struct ProvisionedRouterCredential {
    provider_account_id: String,
    provider_account_json: Option<String>,
    raw_key: String,
    router_username: Option<String>,
    router_password: Option<String>,
    router_access_token: Option<String>,
}

#[derive(Clone, Debug)]
struct RouterAccountLogin {
    username: String,
    password: String,
}

#[derive(Clone, Debug, PartialEq, Eq)]
struct RouterTokenMatch {
    id: String,
    group: Option<String>,
}

/// The Router API key and the credentials used to obtain it are one private
/// server-side secret. The dedicated `llm_router_account.credential_ciphertext`
/// column stores this bundle; plaintext never leaves api-server.
#[derive(Debug, Deserialize, Serialize)]
struct RouterCredentialSecret {
    version: u32,
    api_key: String,
    username: Option<String>,
    password: Option<String>,
    access_token: Option<String>,
}

fn llm_router_provision_locks() -> &'static Mutex<HashMap<String, Arc<Mutex<()>>>> {
    LLM_ROUTER_PROVISION_LOCKS.get_or_init(|| Mutex::new(HashMap::new()))
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ExternalApiKeyCreateRequest {
    name: Option<String>,
}

#[derive(Debug, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ExternalApiKeyPayload {
    key_id: String,
    name: String,
    key_prefix: String,
    scopes: Vec<String>,
    created_at: String,
    last_used_at: Option<String>,
    revoked_at: Option<String>,
    updated_at: String,
}

#[derive(Debug, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ExternalApiKeyCreateResponse {
    api_key: String,
    key: ExternalApiKeyPayload,
}

#[derive(Debug, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ExternalApiKeyListResponse {
    keys: Vec<ExternalApiKeyPayload>,
}

#[derive(Debug, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct ExternalApiKeyResponse {
    key: ExternalApiKeyPayload,
}

pub async fn list_external_api_keys(
    State(state): State<AppState>,
    Extension(request_context): Extension<RequestContext>,
    Extension(authenticated): Extension<AuthenticatedAccessToken>,
) -> Result<Json<Value>, AppError> {
    let keys = state
        .spacetime_client()
        .list_external_api_keys(authenticated.claims().user_id().to_string())
        .await
        .map_err(map_external_api_key_error)?
        .into_iter()
        .map(external_api_key_payload_from_record)
        .collect();

    Ok(json_success_body(
        Some(&request_context),
        ExternalApiKeyListResponse { keys },
    ))
}

pub async fn create_external_api_key(
    State(state): State<AppState>,
    Extension(request_context): Extension<RequestContext>,
    Extension(authenticated): Extension<AuthenticatedAccessToken>,
    Json(payload): Json<ExternalApiKeyCreateRequest>,
) -> Result<Json<Value>, AppError> {
    let raw_key = generate_external_api_key_secret();
    let key_prefix = external_api_key_prefix(raw_key.as_str());
    let key = state
        .spacetime_client()
        .create_external_api_key(ExternalApiKeyCreateRecordInput {
            key_id: build_prefixed_uuid_id(EXTERNAL_API_KEY_ID_PREFIX),
            owner_user_id: authenticated.claims().user_id().to_string(),
            name: payload
                .name
                .map(|value| value.trim().to_string())
                .filter(|value| !value.is_empty())
                .unwrap_or_else(|| "外部 API Key".to_string()),
            key_prefix,
            key_hash: hash_external_api_key(raw_key.as_str()),
            scopes: default_external_api_key_scopes(),
            now_micros: current_utc_micros(),
        })
        .await
        .map_err(map_external_api_key_error)?;

    Ok(json_success_body(
        Some(&request_context),
        ExternalApiKeyCreateResponse {
            api_key: raw_key,
            key: external_api_key_payload_from_record(key),
        },
    ))
}

/// Creates the fixed-purpose LLM Router account key. The request intentionally has
/// no body so ordinary clients cannot choose a provider, URL, model or scope.
pub async fn ensure_llm_router_api_key(
    State(state): State<AppState>,
    Extension(request_context): Extension<RequestContext>,
    Extension(authenticated): Extension<AuthenticatedAccessToken>,
) -> Result<Json<Value>, AppError> {
    let account = ensure_llm_router_account(&state, authenticated.claims().user_id())
        .await
        .map_err(|message| {
            AppError::from_status(StatusCode::SERVICE_UNAVAILABLE).with_message(message)
        })?;
    Ok(json_success_body(
        Some(&request_context),
        json!({ "key": external_api_key_payload_from_router_account(account) }),
    ))
}

/// Ensures that the authenticated account has one server-owned Router key.
/// The plaintext key never leaves this function and is persisted only as
/// authenticated encryption ciphertext in the dedicated llm_router_account row.
pub(crate) async fn ensure_llm_router_account(
    state: &AppState,
    owner_user_id: &str,
) -> Result<LlmRouterAccountRecord, String> {
    let owner_user_id = owner_user_id.trim();
    if owner_user_id.is_empty() {
        return Err("LLM Router 账号缺少 owner_user_id".to_string());
    }
    ensure_llm_router_target_allowed(state)?;
    // Registration and the first LLM request can race in the same process.
    // Serialize provisioning per owner so a transient empty read cannot create
    // multiple Router accounts/keys for one user.
    let provision_lock = {
        let mut locks = llm_router_provision_locks().lock().await;
        Arc::clone(
            locks
                .entry(owner_user_id.to_string())
                .or_insert_with(|| Arc::new(Mutex::new(()))),
        )
    };
    let _guard = provision_lock.lock().await;
    let configured_route = state.config.llm_router_base_url.trim_end_matches('/');
    let encryption_secret = state
        .config
        .effective_llm_router_api_key_encryption_secret()
        .ok_or_else(|| "LLM Router 账号密钥加密配置缺失".to_string())?;
    let account_key = derive_llm_router_account_key(owner_user_id, configured_route);
    let mut persisted = state
        .spacetime_client()
        .get_llm_router_account(owner_user_id.to_string(), configured_route.to_string())
        .await
        .map_err(|error| format!("读取 LLM Router 账号状态失败：{error}"))?;
    if let Some(existing) = persisted.as_ref().filter(|account| {
        account.status == "active"
            && account.revoked_at.is_none()
            && account
                .credential_ciphertext
                .as_deref()
                .is_some_and(|value| !value.trim().is_empty())
    }) {
        tracing::debug!(
            owner_user_id,
            key_id = %existing.key_id,
            "复用已存在的 LLM Router 账号 Key"
        );
        ensure_existing_llm_router_account_contract(state, existing).await?;
        return Ok(existing.clone());
    }

    // A previous process may have revoked the Router account before it crashed
    // while updating the saga row. Repair that local state before deciding whether
    // the account is blocked or reusable.
    if let Some(account) = persisted.as_ref()
        && account.revoked_at.is_some()
    {
        let repaired = upsert_llm_router_account_state(
            state,
            account.account_key.as_str(),
            owner_user_id,
            configured_route,
            account.key_id.as_str(),
            account.router_account_id.clone(),
            account.credential_ciphertext.clone(),
            account.account_json.clone(),
            "retryable",
            account.attempt_count,
            None,
            Some(current_utc_micros()),
            Some("Router Key 已撤销，准备重新签发".to_string()),
        )
        .await?;
        persisted = Some(repaired);
    }

    if let Some(account) = persisted.as_ref() {
        let deterministic_credential_error = account.router_account_id.is_none()
            && account
                .last_error
                .as_deref()
                .is_some_and(is_deterministic_router_credential_error);
        if (account.status == "reconciliation_required" || account.status == "unknown")
            && !deterministic_credential_error
        {
            return Err(format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 账号状态需要对账：{}",
                account.last_error.as_deref().unwrap_or("未知错误")
            ));
        }
    }

    let mut bundle = persisted
        .as_ref()
        .and_then(|account| account.credential_ciphertext.as_deref())
        .map(|ciphertext| {
            decrypt_router_credential_secret_allow_pending(ciphertext, encryption_secret.as_str())
        })
        .transpose()
        .map_err(|error| format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}{error}"))?;

    // A previous build could have persisted credentials rejected by New API's
    // username/password length validator. When no remote account id exists,
    // those credentials never identified a committed remote user and may be
    // safely replaced with the current deterministic values. Unknown remote
    // outcomes with a known account id remain reconciliation-blocked above.
    let expected_username = router_username_for_owner(owner_user_id);
    let provisioning_secret = llm_router_provisioning_secret(state)?;
    let expected_password = generate_router_account_password_with_secret(
        owner_user_id,
        provisioning_secret.as_bytes(),
    )?;
    let stale_pending_credentials = persisted.as_ref().is_some_and(|account| {
        account.router_account_id.is_none()
            && bundle.as_ref().is_some_and(|value| {
                value.api_key.trim().is_empty()
                    && (value.username.as_deref() != Some(expected_username.as_str())
                        || value.password.as_deref() != Some(expected_password.as_str()))
            })
    });
    if stale_pending_credentials {
        bundle = None;
    }

    let key_id = persisted
        .as_ref()
        .map(|account| account.key_id.clone())
        .filter(|value| !value.trim().is_empty())
        .unwrap_or_else(|| derive_llm_router_key_id(owner_user_id, configured_route));

    let mut reusable_login = None;
    let mut generated_new_pending_credentials = false;
    if bundle.is_none() {
        // A historical `llm-router` row may predate the saga table. Reuse its
        // encrypted username/password when the old key was revoked; otherwise
        // a fresh Router user would be created for the same Genarrative owner.
        // The dedicated row already owns the encrypted login bundle; no
        // historical API-key row is consulted for Router recovery.
    }

    if bundle.is_none() {
        generated_new_pending_credentials = true;
        let username = expected_username.clone();
        let password = expected_password.clone();
        let pending = RouterCredentialSecret {
            version: 1,
            api_key: String::new(),
            username: Some(username),
            password: Some(password),
            access_token: None,
        };
        let ciphertext = encrypt_router_credential_secret(&pending, encryption_secret.as_str())?;
        upsert_llm_router_account_state(
            state,
            &account_key,
            owner_user_id,
            configured_route,
            &key_id,
            None,
            Some(ciphertext),
            persisted
                .as_ref()
                .and_then(|value| value.account_json.clone()),
            "pending",
            persisted.as_ref().map_or(0, |value| value.attempt_count),
            None,
            None,
            None,
        )
        .await?;
        bundle = Some(pending);
    }

    if let Some(existing_bundle) = bundle.as_ref() {
        if !existing_bundle.api_key.trim().is_empty()
            && persisted
                .as_ref()
                .is_some_and(|value| matches!(value.status.as_str(), "key_issued" | "active"))
        {
            let active_account = upsert_llm_router_account_state(
                state,
                &account_key,
                owner_user_id,
                configured_route,
                &key_id,
                persisted
                    .as_ref()
                    .and_then(|value| value.router_account_id.clone()),
                Some(encrypt_router_credential_secret(
                    existing_bundle,
                    encryption_secret.as_str(),
                )?),
                persisted
                    .as_ref()
                    .and_then(|value| value.account_json.clone()),
                "active",
                persisted.as_ref().map_or(0, |value| value.attempt_count),
                None,
                None,
                None,
            )
            .await?;
            ensure_existing_llm_router_account_contract(state, &active_account).await?;
            return Ok(active_account);
        }
    }

    // A persisted Router account id proves that the remote user was created;
    // its encrypted username/password may therefore be reused after a key
    // expiry or an interrupted login/token step. A freshly generated pending
    // bundle is also checked against the public Router first, so a missing local
    // database row can recover an already-existing deterministic account.
    if !generated_new_pending_credentials
        && reusable_login.is_none()
        && persisted
            .as_ref()
            .is_some_and(|value| value.router_account_id.is_some())
    {
        reusable_login = bundle.as_ref().and_then(|value| {
            Some(RouterAccountLogin {
                username: value.username.clone()?,
                password: value.password.clone()?,
            })
        });
    }
    let attempt_count = persisted
        .as_ref()
        .map_or(0, |value| value.attempt_count)
        .saturating_add(1);
    let pending_ciphertext = bundle
        .as_ref()
        .map(|value| encrypt_router_credential_secret(value, encryption_secret.as_str()))
        .transpose()?;
    let pending_login = bundle.as_ref().and_then(|value| {
        Some(RouterAccountLogin {
            username: value.username.clone()?,
            password: value.password.clone()?,
        })
    });
    upsert_llm_router_account_state(
        state,
        &account_key,
        owner_user_id,
        configured_route,
        &key_id,
        persisted
            .as_ref()
            .and_then(|value| value.router_account_id.clone()),
        pending_ciphertext.clone(),
        persisted
            .as_ref()
            .and_then(|value| value.account_json.clone()),
        "registering",
        attempt_count,
        None,
        None,
        None,
    )
    .await?;

    let provisioned = match provision_router_account(
        state,
        owner_user_id,
        reusable_login.as_ref(),
        pending_login.as_ref(),
    )
    .await
    {
        Ok(value) => value,
        Err(error) => {
            let status = if error.starts_with(LLM_ROUTER_RECONCILIATION_ERROR_PREFIX) {
                "unknown"
            } else {
                "retryable"
            };
            let _ = upsert_llm_router_account_state(
                state,
                &account_key,
                owner_user_id,
                configured_route,
                &key_id,
                persisted
                    .as_ref()
                    .and_then(|value| value.router_account_id.clone()),
                pending_ciphertext,
                persisted
                    .as_ref()
                    .and_then(|value| value.account_json.clone()),
                status,
                attempt_count,
                None,
                Some(current_utc_micros().saturating_add(60_000_000)),
                Some(error.clone()),
            )
            .await;
            return Err(error);
        }
    };
    let credential_secret = RouterCredentialSecret {
        version: 1,
        api_key: provisioned.raw_key.clone(),
        username: provisioned
            .router_username
            .clone()
            .or_else(|| reusable_login.as_ref().map(|v| v.username.clone())),
        password: provisioned
            .router_password
            .clone()
            .or_else(|| reusable_login.as_ref().map(|v| v.password.clone())),
        access_token: provisioned.router_access_token.clone(),
    };
    let secret_ciphertext =
        encrypt_router_credential_secret(&credential_secret, encryption_secret.as_str())
            .map_err(|error| format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}{error}"))?;
    upsert_llm_router_account_state(
        state,
        &account_key,
        owner_user_id,
        configured_route,
        &key_id,
        Some(provisioned.provider_account_id.clone()),
        Some(secret_ciphertext.clone()),
        provisioned.provider_account_json.clone(),
        "key_issued",
        attempt_count,
        None,
        None,
        None,
    )
    .await?;
    let account = upsert_llm_router_account_state(
        state,
        &account_key,
        owner_user_id,
        configured_route,
        &key_id,
        Some(provisioned.provider_account_id.clone()),
        Some(secret_ciphertext),
        provisioned.provider_account_json.clone(),
        "active",
        attempt_count,
        None,
        None,
        None,
    )
    .await?;
    tracing::info!(
        owner_user_id,
        key_id = %account.key_id,
        router_account_id = ?provisioned.provider_account_id,
        "LLM Router 账号与 API Key provisioning 完成"
    );
    Ok(account)
}

async fn upsert_llm_router_account_state(
    state: &AppState,
    account_key: &str,
    owner_user_id: &str,
    route_origin: &str,
    key_id: &str,
    router_account_id: Option<String>,
    credential_ciphertext: Option<String>,
    account_json: Option<String>,
    status: &str,
    attempt_count: u32,
    lease_until_micros: Option<i64>,
    next_retry_at_micros: Option<i64>,
    last_error: Option<String>,
) -> Result<LlmRouterAccountRecord, String> {
    let key_material = credential_ciphertext.as_deref().and_then(|ciphertext| {
        state
            .config
            .effective_llm_router_api_key_encryption_secret()
            .and_then(|secret| decrypt_router_credential_secret(ciphertext, secret.as_str()).ok())
            .filter(|bundle| !bundle.api_key.trim().is_empty())
            .map(|bundle| {
                let raw_key = bundle.api_key.trim().to_string();
                (
                    external_api_key_prefix(raw_key.as_str()),
                    hash_llm_router_key(owner_user_id, key_id, raw_key.as_str()),
                )
            })
    });
    let account = state
        .spacetime_client()
        .upsert_llm_router_account(LlmRouterAccountUpsertRecordInput {
            account_key: account_key.to_string(),
            owner_user_id: owner_user_id.to_string(),
            route_origin: route_origin.to_string(),
            idempotency_key: key_id.to_string(),
            router_account_id,
            credential_ciphertext,
            account_json,
            status: status.to_string(),
            attempt_count,
            lease_until_micros,
            next_retry_at_micros,
            last_error: last_error.clone(),
            credential_version: 1,
            now_micros: current_utc_micros(),
            key_id: key_id.to_string(),
            key_name: LLM_ROUTER_TOKEN_IDENTIFIER.to_string(),
            key_prefix: key_material.as_ref().map(|(prefix, _)| prefix.clone()),
            key_hash: key_material.map(|(_, hash)| hash),
            last_used_at_micros: None,
            revoked_at_micros: last_error
                .as_deref()
                .filter(|value| {
                    value.contains("Router 返回 401/403") || value.contains("Router Key 已撤销")
                })
                .map(|_| current_utc_micros()),
        })
        .await
        .map_err(|error| format!("保存 LLM Router 账号状态失败：{error}"))?;
    Ok(account)
}

/// Ensures the Router user has the fixed AGC subscription before the server
/// exposes/reuses its API key. Subscription management is deliberately tied to
/// authentication/key preparation rather than the streaming response path.
async fn ensure_existing_llm_router_account_contract(
    state: &AppState,
    record: &LlmRouterAccountRecord,
) -> Result<(), String> {
    let Some(admin_token) = state
        .config
        .llm_router_admin_token
        .as_deref()
        .map(str::trim)
        .filter(|value| !value.is_empty())
    else {
        return Err(
            "LLM Router 管理员 Token 未配置，无法确保用户分组和 plan_id=1 订阅".to_string(),
        );
    };

    let encryption_secret = state
        .config
        .effective_llm_router_api_key_encryption_secret()
        .ok_or_else(|| "LLM Router 账号密钥加密配置缺失".to_string())?;
    let bundle = record
        .credential_ciphertext
        .as_deref()
        .filter(|value| !value.trim().is_empty())
        .map(|ciphertext| decrypt_router_credential_secret(ciphertext, encryption_secret.as_str()))
        .transpose()
        .map_err(|error| format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}{error}"))?
        .ok_or_else(|| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}active Router Key 缺少 Router 账号凭据"
            )
        })?;
    let username = bundle.username.ok_or_else(|| {
        format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}active Router Key 缺少 Router 用户名")
    })?;
    let password = bundle.password.ok_or_else(|| {
        format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}active Router Key 缺少 Router 密码")
    })?;
    let origin = router_control_origin(state.config.llm_router_base_url.as_str())?;
    let client = router_admin_client()?;
    let router_user_id = search_router_user_id(&client, origin.as_str(), admin_token, &username)
        .await?
        .ok_or_else(|| {
            format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}无法通过用户名查询 Router 用户 ID")
        })?;
    if let Some(recorded_router_user_id) = router_user_id_from_account(record)
        && recorded_router_user_id != router_user_id
    {
        return Err(format!(
            "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}本地 Router 用户 ID 与远端查询结果不一致"
        ));
    }

    // The paid group belongs to the Router user, not to the API token. This
    // repair is intentionally run at account preparation/login time so an old
    // active row created before the group split cannot keep using `taonier` as
    // its token group.
    update_router_user(
        &client,
        origin.as_str(),
        admin_token,
        router_user_id,
        username.as_str(),
        record.owner_user_id.as_str(),
    )
    .await?;

    let login_token = login_router_account(
        &client,
        origin.as_str(),
        username.as_str(),
        password.as_str(),
    )
    .await
    .map_err(|error| {
        format!(
            "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}active Router 用户无法使用保存的凭据登录：{error}"
        )
    })?;
    let token = find_router_token_id(&client, origin.as_str(), login_token.as_str())
        .await?
        .ok_or_else(|| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}active Router Key 对应的固定 Token 不存在"
            )
        })?;
    ensure_router_token_contract(
        &client,
        origin.as_str(),
        login_token.as_str(),
        token.id.as_str(),
    )
    .await?;

    ensure_router_subscription(&client, origin.as_str(), admin_token, router_user_id).await
}

fn router_admin_client() -> Result<reqwest::Client, String> {
    reqwest::Client::builder()
        .connect_timeout(std::time::Duration::from_secs(10))
        .timeout(std::time::Duration::from_secs(30))
        .redirect(reqwest::redirect::Policy::none())
        .build()
        .map_err(|error| format!("创建 LLM Router 管理客户端失败：{error}"))
}

#[derive(Clone, Debug, PartialEq, Eq)]
struct RouterSubscriptionSummary {
    plan_id: i64,
    status: String,
    end_time: i64,
}

fn subscription_requires_renewal(
    subscriptions: &[RouterSubscriptionSummary],
    now_unix_seconds: i64,
) -> bool {
    let latest_active_end = subscriptions
        .iter()
        .filter(|subscription| {
            subscription.plan_id == LLM_ROUTER_SUBSCRIPTION_PLAN_ID
                && subscription.status.eq_ignore_ascii_case("active")
        })
        .map(|subscription| subscription.end_time)
        .max();
    latest_active_end.is_none_or(|end_time| {
        end_time
            <= now_unix_seconds.saturating_add(LLM_ROUTER_SUBSCRIPTION_RENEWAL_THRESHOLD_SECONDS)
    })
}

fn extract_router_subscriptions(payload: &Value) -> Vec<RouterSubscriptionSummary> {
    fn search(value: &Value, matches: &mut Vec<RouterSubscriptionSummary>) {
        match value {
            Value::Object(object) => {
                let subscription = object.get("subscription").unwrap_or(value);
                if let Value::Object(subscription) = subscription {
                    let plan_id = subscription
                        .get("plan_id")
                        .or_else(|| subscription.get("planId"))
                        .and_then(provider_value_to_i64);
                    let status = subscription
                        .get("status")
                        .and_then(Value::as_str)
                        .map(str::trim)
                        .filter(|value| !value.is_empty());
                    let end_time = subscription
                        .get("end_time")
                        .or_else(|| subscription.get("endTime"))
                        .and_then(provider_value_to_i64);
                    if let (Some(plan_id), Some(status), Some(end_time)) =
                        (plan_id, status, end_time)
                    {
                        matches.push(RouterSubscriptionSummary {
                            plan_id,
                            status: status.to_string(),
                            end_time,
                        });
                    }
                }
                for child in object.values() {
                    search(child, matches);
                }
            }
            Value::Array(values) => {
                for child in values {
                    search(child, matches);
                }
            }
            _ => {}
        }
    }

    let mut matches = Vec::new();
    search(payload, &mut matches);
    matches.sort_by_key(|subscription| {
        (
            subscription.plan_id,
            subscription.status.to_ascii_lowercase(),
            subscription.end_time,
        )
    });
    matches.dedup();
    matches
}

async fn ensure_router_subscription(
    client: &reqwest::Client,
    origin: &str,
    admin_token: &str,
    router_user_id: i64,
) -> Result<(), String> {
    if router_user_id <= 0 {
        return Err(format!(
            "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 用户 ID 无效，无法检查订阅"
        ));
    }
    let response = client
        .get(format!(
            "{origin}/api/subscription/admin/users/{router_user_id}/subscriptions"
        ))
        .bearer_auth(admin_token)
        .send()
        .await
        .map_err(|error| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 订阅查询未取得确定响应：{error}"
            )
        })?;
    let status = response.status();
    let payload = response_json_or_text(response).await?;
    if !status.is_success() || provider_payload_failed(&payload) {
        let message = format!(
            "LLM Router 订阅查询失败：HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        );
        return Err(
            if !status.is_success() && router_http_failure_requires_reconciliation(status) {
                format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}{message}")
            } else {
                message
            },
        );
    }

    let subscriptions = extract_router_subscriptions(&payload);
    let now_unix_seconds = current_utc_micros().div_euclid(1_000_000);
    if !subscription_requires_renewal(&subscriptions, now_unix_seconds) {
        return Ok(());
    }

    let response = client
        .post(format!(
            "{origin}/api/subscription/admin/users/{router_user_id}/subscriptions"
        ))
        .bearer_auth(admin_token)
        .json(&json!({"plan_id": LLM_ROUTER_SUBSCRIPTION_PLAN_ID}))
        .send()
        .await
        .map_err(|error| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 订阅创建未取得确定响应：{error}"
            )
        })?;
    let status = response.status();
    let payload = response_json_or_text(response).await?;
    if !status.is_success() || provider_payload_failed(&payload) {
        let message = format!(
            "LLM Router 订阅创建失败：HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        );
        return Err(
            if !status.is_success() && router_http_failure_requires_reconciliation(status) {
                format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}{message}")
            } else {
                message
            },
        );
    }
    tracing::info!(
        router_user_id,
        plan_id = LLM_ROUTER_SUBSCRIPTION_PLAN_ID,
        "LLM Router 订阅已开通或续期"
    );
    Ok(())
}

pub(crate) fn router_user_id_from_account(record: &LlmRouterAccountRecord) -> Option<i64> {
    record
        .router_account_id
        .as_deref()
        .and_then(|value| value.trim().parse::<i64>().ok())
        .or_else(|| {
            record
                .account_json
                .as_deref()
                .and_then(|value| serde_json::from_str::<Value>(value).ok())
                .and_then(|value| {
                    value
                        .get("routerUserId")
                        .or_else(|| value.get("router_user_id"))
                        .or_else(|| value.get("userId"))
                        .or_else(|| value.get("user_id"))
                        .and_then(provider_value_to_i64)
                })
        })
}

/// Starts best-effort Router-account preparation after successful
/// authentication. Router control-plane availability must not gate the main
/// site session; the LLM hot path validates the locally persisted credential
/// when a request is actually made.
pub(crate) async fn ensure_llm_router_account_after_auth_success(
    state: &AppState,
    _request_context: &RequestContext,
    owner_user_id: &str,
) -> Result<(), String> {
    #[cfg(test)]
    if std::env::var_os("GENARRATIVE_LLM_ROUTER_AUTH_PROVISION_TEST").is_none() {
        // Authentication tests should not contact the production Router. The
        // provisioning path remains covered by its dedicated tests and can
        // be enabled explicitly with this test-only fixture switch.
        return Ok(());
    }

    #[cfg(test)]
    {
        if let Err(error) = ensure_llm_router_account(state, owner_user_id).await {
            tracing::warn!(
                user_id = %owner_user_id,
                error = %error,
                "测试环境登录后 LLM Router 账号准备失败；已允许主站登录"
            );
        }
        return Ok(());
    }

    #[cfg(not(test))]
    {
        let state = state.clone();
        let owner_user_id = owner_user_id.to_string();
        tokio::spawn(async move {
            if let Err(error) = ensure_llm_router_account(&state, owner_user_id.as_str()).await {
                tracing::warn!(
                    user_id = %owner_user_id,
                    error = %error,
                    "登录后 LLM Router 账号准备失败；已允许主站登录，后续 LLM 请求将按需失败关闭"
                );
            }
        });
        Ok(())
    }
}

/// Reads an already-provisioned Router credential without contacting the
/// Router control plane. Account registration, user-group repair and
/// subscription renewal belong to the authentication/key-preparation anchor;
/// the hot LLM forwarding path only needs this validated local row.
pub(crate) async fn read_active_llm_router_credentials(
    state: &AppState,
    owner_user_id: &str,
) -> Result<Option<(String, String, String)>, String> {
    let owner_user_id = owner_user_id.trim();
    if owner_user_id.is_empty() {
        return Err("LLM Router 账号缺少 owner_user_id".to_string());
    }
    ensure_llm_router_target_allowed(state)?;
    let encryption_secret = state
        .config
        .effective_llm_router_api_key_encryption_secret()
        .ok_or_else(|| "LLM Router 账号密钥加密配置缺失".to_string())?;
    let Some(account) = state
        .spacetime_client()
        .get_llm_router_account(
            owner_user_id.to_string(),
            state
                .config
                .llm_router_base_url
                .trim_end_matches('/')
                .to_string(),
        )
        .await
        .map_err(|error| format!("读取 LLM Router 账号失败：{error}"))?
        .filter(|account| account.status == "active" && account.revoked_at.is_none())
    else {
        return Ok(None);
    };
    let ciphertext = account.credential_ciphertext.as_deref().ok_or_else(|| {
        format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}active Router Key 密文缺失")
    })?;
    // Router account state is read from SpacetimeDB immediately before every
    // upstream request and the current ciphertext is decrypted on demand. This
    // deliberately avoids a TTL cache: another api-server instance can rotate
    // or revoke the durable row at any time, and no process-local entry can
    // outlive that authoritative state.
    let api_key = decrypt_router_api_key(ciphertext, encryption_secret.as_str())?;
    Ok(Some((
        state
            .config
            .llm_router_base_url
            .trim_end_matches('/')
            .to_string(),
        api_key,
        account.key_id,
    )))
}

pub(crate) async fn revoke_llm_router_account(
    state: &AppState,
    owner_user_id: &str,
    key_id: &str,
) -> Result<(), String> {
    let route_origin = state.config.llm_router_base_url.trim_end_matches('/');
    if let Some(account) = state
        .spacetime_client()
        .get_llm_router_account(owner_user_id.to_string(), route_origin.to_string())
        .await
        .map_err(|error| format!("读取 LLM Router 账号失效状态失败：{error}"))?
        .filter(|account| account.key_id == key_id)
    {
        upsert_llm_router_account_state(
            state,
            account.account_key.as_str(),
            owner_user_id,
            route_origin,
            key_id,
            account.router_account_id.clone(),
            account.credential_ciphertext.clone(),
            account.account_json.clone(),
            "retryable",
            account.attempt_count,
            None,
            Some(current_utc_micros()),
            Some("Router 返回 401/403，等待重新签发账号 Key".to_string()),
        )
        .await?;
    }
    Ok(())
}

async fn provision_router_account(
    state: &AppState,
    owner_user_id: &str,
    reusable_login: Option<&RouterAccountLogin>,
    pending_login: Option<&RouterAccountLogin>,
) -> Result<ProvisionedRouterCredential, String> {
    // 走 Router New API 的正式账号链路：先按稳定用户名/密码恢复已有用户，确认不存在
    // 后才注册，再登录、复用或创建无限额度 token、签发 API Key。网络/5xx/格式不确定
    // 等情况保持 reconciliation，避免重复注册。
    provision_router_account_via_new_api(state, owner_user_id, reusable_login, pending_login).await
}

async fn provision_router_account_via_new_api(
    state: &AppState,
    owner_user_id: &str,
    reusable_login: Option<&RouterAccountLogin>,
    pending_login: Option<&RouterAccountLogin>,
) -> Result<ProvisionedRouterCredential, String> {
    let origin = router_control_origin(state.config.llm_router_base_url.as_str())?;
    let client = reqwest::Client::builder()
        .connect_timeout(std::time::Duration::from_secs(10))
        .timeout(std::time::Duration::from_secs(30))
        .redirect(reqwest::redirect::Policy::none())
        .build()
        .map_err(|error| format!("创建 LLM Router 账号客户端失败：{error}"))?;
    let (username, password) = reusable_login
        .map(|login| (login.username.clone(), login.password.clone()))
        .or_else(|| pending_login.map(|login| (login.username.clone(), login.password.clone())))
        .unwrap_or((
            router_username_for_owner(owner_user_id),
            generate_router_account_password_with_secret(
                owner_user_id,
                llm_router_provisioning_secret(state)?.as_bytes(),
            )?,
        ));
    let admin_token = state
        .config
        .llm_router_admin_token
        .as_deref()
        .map(str::trim)
        .filter(|value| !value.is_empty());
    let admin_token = admin_token.ok_or_else(|| {
        "LLM Router 管理员 Token 未配置，无法完成用户分组、订阅和 API Key 签发".to_string()
    })?;

    let (login_token, router_user_id) = if reusable_login.is_some() {
        let login_token = login_router_account(
            &client,
            origin.as_str(),
            username.as_str(),
            password.as_str(),
        )
        .await
        .map_err(|error| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}已存在的 Router 用户无法使用保存的凭据登录：{error}"
            )
        })?;
        let router_user_id = search_router_user_id(
            &client,
            origin.as_str(),
            admin_token,
            username.as_str(),
        )
        .await?
        .ok_or_else(|| {
            format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}已登录的 Router 用户无法查询用户 ID")
        })?;
        (login_token, router_user_id)
    } else {
        let existing_router_user_id =
            search_router_user_id(&client, origin.as_str(), admin_token, username.as_str()).await?;

        if let Some(remote_router_user_id) = existing_router_user_id {
            // Existing deterministic accounts may have been created before the
            // group-update step completed (for example after a process crash).
            // Reapply the complete user update so the account is always in the
            // paid `taonier` group.
            update_router_user(
                &client,
                origin.as_str(),
                admin_token,
                remote_router_user_id,
                username.as_str(),
                owner_user_id,
            )
            .await?;
            let login_token = login_router_account(&client, origin.as_str(), username.as_str(), password.as_str())
                .await
                .map_err(|error| {
                    format!(
                        "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 用户已存在但稳定密码无法登录：{error}"
                    )
                })?;
            (login_token, remote_router_user_id)
        } else {
            let register_error = register_router_user(
                &client,
                origin.as_str(),
                admin_token,
                username.as_str(),
                password.as_str(),
                owner_user_id,
            )
            .await
            .err();

            let remote_router_user_id =
                search_router_user_id(&client, origin.as_str(), admin_token, username.as_str())
                    .await?
                    .ok_or_else(|| {
                        register_error.unwrap_or_else(|| {
                    format!(
                        "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 注册成功后无法查询到用户 ID"
                    )
                })
                    })?;
            update_router_user(
                &client,
                origin.as_str(),
                admin_token,
                remote_router_user_id,
                username.as_str(),
                owner_user_id,
            )
            .await?;
            let login_token = login_router_account(
                &client,
                origin.as_str(),
                username.as_str(),
                password.as_str(),
            )
            .await?;
            (login_token, remote_router_user_id)
        }
    };

    ensure_router_subscription(&client, origin.as_str(), admin_token, router_user_id).await?;

    let (token_id, token_payload) = if let Some(token) =
        find_router_token_id(&client, origin.as_str(), login_token.as_str()).await?
    {
        // Keep the fixed token contract authoritative even when the Router
        // returns an incomplete token summary (for example without `group`).
        // The user remains in `taonier`; only this API token must be in the
        // `default` group with unlimited quota and no expiry.
        // PUT the complete fixed token contract, not just the group. This
        // repairs old tokens that were created with `taonier`, and also
        // restores unlimited quota/permanent expiry if an operator changed
        // either field. The request is cheap because this path only runs when
        // provisioning or recovering an account, not for every LLM call.
        ensure_router_token_contract(
            &client,
            origin.as_str(),
            login_token.as_str(),
            token.id.as_str(),
        )
        .await?;
        (token.id, json!({}))
    } else {
        let token_response = client
            .post(format!("{origin}/api/token/"))
            .bearer_auth(login_token.as_str())
            .json(&router_token_request())
            .send()
            .await
            .map_err(|error| {
                format!(
                    "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router token 创建未取得确定响应：{error}"
                )
            })?;
        let token_status = token_response.status();
        let token_payload = response_json_or_text(token_response).await?;
        if !token_status.is_success() {
            if router_http_failure_requires_reconciliation(token_status) {
                return Err(format!(
                    "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}LLM Router token 创建返回 HTTP {}，结果可能未知{}",
                    token_status.as_u16(),
                    provider_payload_error_suffix(&token_payload)
                ));
            }
            return Err(format!(
                "LLM Router token 创建失败：HTTP {}{}",
                token_status.as_u16(),
                provider_payload_error_suffix(&token_payload)
            ));
        }
        if provider_payload_failed(&token_payload) {
            return Err(format!(
                "LLM Router token 创建失败：HTTP {}{}",
                token_status.as_u16(),
                provider_payload_error_suffix(&token_payload)
            ));
        }
        let token_id = if let Some(token_id) =
            extract_provider_string(&token_payload, &["id", "tokenId", "token_id"])
        {
            token_id
        } else {
            find_router_token_id(&client, origin.as_str(), login_token.as_str())
                .await?
                .map(|token| token.id)
                .ok_or_else(|| {
                    format!(
                        "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router token 查询响应缺少 token id"
                    )
                })?
        };
        // New API may accept the create request while applying the user's
        // default group. Normalize the freshly-created token before issuing a
        // key; otherwise a successful POST can still produce a token routed
        // through `taonier` and later fail with `model_not_found`.
        ensure_router_token_contract(
            &client,
            origin.as_str(),
            login_token.as_str(),
            token_id.as_str(),
        )
        .await?;
        (token_id, token_payload)
    };

    let key_response = client
        .post(format!("{origin}/api/token/{token_id}/key"))
        .bearer_auth(login_token.as_str())
        .send()
        .await
        .map_err(|error| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router API Key 签发未取得确定响应：{error}"
            )
        })?;
    let key_status = key_response.status();
    let key_payload = response_json_or_text(key_response).await?;
    if !key_status.is_success() {
        if router_http_failure_requires_reconciliation(key_status) {
            return Err(format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}LLM Router API Key 签发返回 HTTP {}，结果可能未知{}",
                key_status.as_u16(),
                provider_payload_error_suffix(&key_payload)
            ));
        }
        return Err(format!(
            "LLM Router API Key 签发失败：HTTP {}{}",
            key_status.as_u16(),
            provider_payload_error_suffix(&key_payload)
        ));
    }
    if provider_payload_failed(&key_payload) {
        return Err(format!(
            "LLM Router API Key 签发失败：HTTP {}{}",
            key_status.as_u16(),
            provider_payload_error_suffix(&key_payload)
        ));
    }
    let raw_key = extract_provider_string(&key_payload, &["apiKey", "api_key", "key", "token"])
        .ok_or_else(|| {
            format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router API Key 响应缺少 key")
        })?;
    let account_id = extract_provider_string(
        &token_payload,
        &["accountId", "account_id", "userId", "user_id"],
    )
    .unwrap_or_else(|| username.clone());
    Ok(ProvisionedRouterCredential {
        provider_account_id: account_id.clone(),
        provider_account_json: Some(
            json!({
                "version": 1,
                "accountId": account_id,
                "routerUserId": router_user_id,
                "username": username,
                "routeOrigin": state.config.llm_router_base_url,
                "model": state.config.llm_router_model,
                "credentialSource": "router-new-api",
            })
            .to_string(),
        ),
        raw_key: normalize_new_api_relay_api_key(raw_key.as_str())?,
        router_username: Some(username),
        router_password: Some(password),
        router_access_token: None,
    })
}

async fn search_router_user_id(
    client: &reqwest::Client,
    origin: &str,
    admin_token: &str,
    username: &str,
) -> Result<Option<i64>, String> {
    let mut search_url = reqwest::Url::parse(format!("{origin}/api/user/search").as_str())
        .map_err(|error| format!("Router 用户查询地址无效：{error}"))?;
    search_url
        .query_pairs_mut()
        .append_pair("keyword", username);
    let response = client
        .get(search_url)
        .bearer_auth(admin_token)
        .send()
        .await
        .map_err(|error| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 用户查询未取得确定响应：{error}"
            )
        })?;
    let status = response.status();
    let payload = response_json_or_empty(response).await?;
    if !status.is_success() {
        return Err(format!(
            "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 用户查询返回 HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        ));
    }
    if provider_payload_failed(&payload) {
        return Err(format!(
            "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 用户查询失败{}",
            provider_payload_error_suffix(&payload)
        ));
    }
    Ok(extract_router_user_id(&payload, username))
}

async fn register_router_user(
    client: &reqwest::Client,
    origin: &str,
    admin_token: &str,
    username: &str,
    password: &str,
    owner_user_id: &str,
) -> Result<(), String> {
    let response = client
        .post(format!("{origin}/api/user/"))
        .bearer_auth(admin_token)
        .json(&json!({
            "username": username,
            "password": password,
            "display_name": router_user_display_name(username),
            "remark": owner_user_id,
            "role": 1,
        }))
        .send()
        .await
        .map_err(|error| {
            format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 注册未取得确定响应：{error}")
        })?;
    let status = response.status();
    let payload = response_json_or_text(response).await?;
    if !status.is_success() || provider_payload_failed(&payload) {
        let message = format!(
            "LLM Router 注册失败：HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        );
        // A successful HTTP response with `success=false` is a deterministic
        // business/validation failure. Only transport, redirect, and server
        // side failures require reconciliation because the remote write may
        // have committed before the response was lost.
        return Err(
            if !status.is_success() && router_http_failure_requires_reconciliation(status) {
                format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}{message}")
            } else {
                message
            },
        );
    }
    Ok(())
}

async fn update_router_user(
    client: &reqwest::Client,
    origin: &str,
    admin_token: &str,
    router_user_id: i64,
    username: &str,
    owner_user_id: &str,
) -> Result<(), String> {
    let response = client
        .put(format!("{origin}/api/user/"))
        .bearer_auth(admin_token)
        .json(&router_user_update_request(
            router_user_id,
            username,
            owner_user_id,
        ))
        .send()
        .await
        .map_err(|error| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 用户分组设置未取得确定响应：{error}"
            )
        })?;
    let status = response.status();
    let payload = response_json_or_text(response).await?;
    if !status.is_success() || provider_payload_failed(&payload) {
        let message = format!(
            "LLM Router 用户分组设置失败：HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        );
        return Err(if !status.is_client_error() {
            format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}{message}")
        } else {
            message
        });
    }
    Ok(())
}

async fn login_router_account(
    client: &reqwest::Client,
    origin: &str,
    username: &str,
    password: &str,
) -> Result<String, String> {
    let response = client
        .post(format!("{origin}/api/user/login"))
        .json(&json!({"username": username, "password": password}))
        .send()
        .await
        .map_err(|error| {
            format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 登录未取得确定响应：{error}")
        })?;
    let status = response.status();
    let payload = response_json_or_text(response).await?;
    if !status.is_success() {
        if router_http_failure_requires_reconciliation(status) {
            return Err(format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}LLM Router 登录返回 HTTP {}，结果可能未知{}",
                status.as_u16(),
                provider_payload_error_suffix(&payload)
            ));
        }
        return Err(format!(
            "LLM Router 登录失败：HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        ));
    }
    if provider_payload_failed(&payload) {
        return Err(format!(
            "LLM Router 登录失败：HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        ));
    }
    extract_provider_string(
        &payload,
        &["token", "accessToken", "access_token", "userToken"],
    )
    .ok_or_else(|| {
        format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 登录响应缺少 access token")
    })
}

fn router_token_request() -> Value {
    json!({
        "name": LLM_ROUTER_TOKEN_IDENTIFIER,
        "expired_time": -1,
        "unlimited_quota": true,
        "group": LLM_ROUTER_TOKEN_GROUP,
    })
}

fn router_token_update_request(token_id: i64) -> Value {
    json!({
        "id": token_id,
        "name": LLM_ROUTER_TOKEN_IDENTIFIER,
        "expired_time": -1,
        "unlimited_quota": true,
        "group": LLM_ROUTER_TOKEN_GROUP,
    })
}

fn router_user_update_request(user_id: i64, username: &str, owner_user_id: &str) -> Value {
    json!({
        "id": user_id,
        "username": username,
        "display_name": router_user_display_name(username),
        "remark": owner_user_id,
        "group": LLM_ROUTER_USER_GROUP,
        "role": 1,
    })
}

fn router_user_display_name(username: &str) -> String {
    username.to_string()
}

async fn find_router_token_id(
    client: &reqwest::Client,
    origin: &str,
    login_token: &str,
) -> Result<Option<RouterTokenMatch>, String> {
    let mut search_url = reqwest::Url::parse(format!("{origin}/api/token/search").as_str())
        .map_err(|error| format!("Router token 查询地址无效：{error}"))?;
    search_url
        .query_pairs_mut()
        .append_pair("keyword", LLM_ROUTER_TOKEN_IDENTIFIER);
    let response = client
        .get(search_url)
        .bearer_auth(login_token)
        .send()
        .await
        .map_err(|error| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router token 查询未取得确定响应：{error}"
            )
        })?;
    let status = response.status();
    let payload = response_json_or_empty(response).await?;
    if !status.is_success() {
        return Err(format!(
            "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router token 查询返回 HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        ));
    }
    if provider_payload_failed(&payload) {
        return Err(format!(
            "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router token 查询失败{}",
            provider_payload_error_suffix(&payload)
        ));
    }
    let token =
        extract_router_token_info(&payload, LLM_ROUTER_TOKEN_IDENTIFIER).map_err(|error| {
            format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router token 标识不唯一：{error}")
        })?;
    Ok(token)
}

async fn ensure_router_token_contract(
    client: &reqwest::Client,
    origin: &str,
    login_token: &str,
    token_id: &str,
) -> Result<(), String> {
    let numeric_token_id = token_id.parse::<i64>().map_err(|_| {
        format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router token id 格式无效，无法修正分组")
    })?;
    let response = client
        .put(format!("{origin}/api/token/"))
        .bearer_auth(login_token)
        .json(&router_token_update_request(numeric_token_id))
        .send()
        .await
        .map_err(|error| {
            format!(
                "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router token 分组修正未取得确定响应：{error}"
            )
        })?;
    let status = response.status();
    let payload = response_json_or_text(response).await?;
    if !status.is_success() || provider_payload_failed(&payload) {
        let message = format!(
            "LLM Router token 分组修正失败：HTTP {}{}",
            status.as_u16(),
            provider_payload_error_suffix(&payload)
        );
        return Err(
            if !status.is_success() && router_http_failure_requires_reconciliation(status) {
                format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}{message}")
            } else {
                message
            },
        );
    }
    Ok(())
}

fn router_control_origin(base_url: &str) -> Result<String, String> {
    let mut url = reqwest::Url::parse(base_url.trim_end_matches('/'))
        .map_err(|error| format!("LLM Router 地址无效：{error}"))?;
    let is_loopback = url.host_str().is_some_and(|host| {
        host.eq_ignore_ascii_case("localhost")
            || host
                .parse::<std::net::IpAddr>()
                .is_ok_and(|address| address.is_loopback())
    });
    let allowed_scheme = url.scheme() == "https" || (url.scheme() == "http" && is_loopback);
    if !allowed_scheme || url.host_str().is_none() {
        return Err("LLM Router 账号链路只允许 HTTPS 或 loopback HTTP 地址".to_string());
    }
    url.set_path("");
    url.set_query(None);
    url.set_fragment(None);
    Ok(url.to_string().trim_end_matches('/').to_string())
}

fn ensure_llm_router_target_allowed(state: &AppState) -> Result<(), String> {
    let base_url = state.config.llm_router_base_url.trim_end_matches('/');
    let url =
        reqwest::Url::parse(base_url).map_err(|error| format!("LLM Router 地址无效：{error}"))?;
    let host = url
        .host_str()
        .ok_or_else(|| "LLM Router 地址缺少主机名".to_string())?;
    let is_loopback = host.eq_ignore_ascii_case("localhost")
        || host
            .parse::<std::net::IpAddr>()
            .is_ok_and(|address| address.is_loopback());

    #[cfg(test)]
    if !is_loopback {
        return Err("单元测试禁止连接非 loopback 的 LLM Router".to_string());
    }

    if state.config.is_production() {
        if base_url != OFFICIAL_LLM_ROUTER_BASE_URL {
            return Err("生产环境 LLM Router 必须使用官方固定路由".to_string());
        }
        if state.config.llm_router_model.trim() != OFFICIAL_LLM_ROUTER_MODEL {
            return Err("生产环境 LLM Router 必须使用官方固定模型".to_string());
        }
        if url.scheme() != "https" {
            return Err("生产环境 LLM Router 只允许 HTTPS 地址".to_string());
        }
        return Ok(());
    }

    if base_url == OFFICIAL_LLM_ROUTER_BASE_URL {
        if state.config.llm_router_model.trim() != OFFICIAL_LLM_ROUTER_MODEL {
            return Err("LLM Router 必须使用官方固定模型".to_string());
        }
        if url.scheme() != "https" {
            return Err("官方 LLM Router 只允许 HTTPS 地址".to_string());
        }
        // Shared Router is intentionally usable by development deployments too:
        // each deployment may have an independent database, while the stable
        // owner-derived agc_user_ account and agc_auto_generate Token are shared.
        return Ok(());
    }

    if !is_loopback {
        return Err(format!(
            "当前环境 {} 只允许官方固定 LLM Router 或 loopback Router；请检查路由配置",
            state.config.environment
        ));
    }
    if !matches!(url.scheme(), "http" | "https") {
        return Err("非生产环境 LLM Router 只允许 HTTP/HTTPS loopback 地址".to_string());
    }
    Ok(())
}

fn router_username_for_owner(owner_user_id: &str) -> String {
    // New API 的 User.Username 校验上限是 20 个字符。保留可读前缀后只
    // 能放 11 个字符；使用完整 owner id 做 SHA-256，再编码成 8 字节的
    // URL-safe 短码（11 个 ASCII 字符），得到稳定且看起来随机的用户名。
    let digest = Sha256::digest(
        format!("genarrative-agc-router-user:v1\n{}", owner_user_id.trim()).as_bytes(),
    );
    let short_code = URL_SAFE_NO_PAD.encode(&digest[..8]);
    debug_assert_eq!(short_code.len(), 11);
    format!("agc_user_{short_code}")
}

fn llm_router_provisioning_secret(state: &AppState) -> Result<String, String> {
    if let Some(secret) = state
        .config
        .llm_router_provisioning_secret
        .as_deref()
        .map(str::trim)
        .filter(|value| !value.is_empty())
    {
        return Ok(secret.to_string());
    }
    #[cfg(test)]
    {
        return Ok("test-only-router-provisioning-secret".to_string());
    }
    #[cfg(not(test))]
    {
        Err("LLM Router 账号密码派生密钥未配置".to_string())
    }
}

#[cfg(test)]
fn generate_router_account_password(owner_user_id: &str) -> Result<String, String> {
    generate_router_account_password_with_secret(
        owner_user_id,
        b"test-only-router-provisioning-secret",
    )
}

fn generate_router_account_password_with_secret(
    owner_user_id: &str,
    provisioning_secret: &[u8],
) -> Result<String, String> {
    let owner_user_id = owner_user_id.trim();
    if owner_user_id.is_empty() {
        return Err("LLM Router 账号密码派生参数缺失".to_string());
    }

    if provisioning_secret.is_empty() {
        return Err("LLM Router 账号密码派生密钥未配置".to_string());
    }
    let mut signer = HmacSha256::new_from_slice(provisioning_secret)
        .map_err(|_| "LLM Router 账号密码派生密钥无效".to_string())?;
    signer.update(
        format!(
            "genarrative-llm-router-password:v{}\n{}",
            LLM_ROUTER_PROVISIONING_CREDENTIAL_VERSION, owner_user_id
        )
        .as_bytes(),
    );
    let digest = signer.finalize().into_bytes();
    // New API 的 User.Password 校验范围是 8..=20。使用完整 owner id
    // 派生 10 字节 HMAC 并编码为 20 位 hex；不再附加人为的 Router 前缀。
    Ok(hex::encode(&digest[..10]))
}

async fn response_json_or_empty(response: reqwest::Response) -> Result<Value, String> {
    let bytes = response.bytes().await.map_err(|error| {
        format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 响应读取失败：{error}")
    })?;
    if bytes.is_empty() {
        return Ok(json!({}));
    }
    serde_json::from_slice::<Value>(&bytes).map_err(|error| {
        format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 响应格式无效：{error}")
    })
}

async fn response_json_or_text(response: reqwest::Response) -> Result<Value, String> {
    let bytes = response.bytes().await.map_err(|error| {
        format!("{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 响应读取失败：{error}")
    })?;
    if bytes.is_empty() {
        return Ok(json!({}));
    }
    match serde_json::from_slice::<Value>(&bytes) {
        Ok(value) => Ok(value),
        Err(_) => String::from_utf8(bytes.to_vec())
            .map(|value| Value::String(value.trim().to_string()))
            .ok()
            .filter(|value| value.as_str().is_some_and(|text| !text.is_empty()))
            .ok_or_else(|| {
                format!(
                    "{LLM_ROUTER_RECONCILIATION_ERROR_PREFIX}Router 响应既不是合法 JSON 也不是非空文本"
                )
            }),
    }
}

fn extract_router_user_id(payload: &Value, username: &str) -> Option<i64> {
    fn search(value: &Value, username: &str) -> Option<i64> {
        match value {
            Value::Object(object) => {
                let object_username = object
                    .get("username")
                    .or_else(|| object.get("userName"))
                    .and_then(Value::as_str);
                if object_username.is_some_and(|value| value == username) {
                    return object
                        .get("id")
                        .or_else(|| object.get("userId"))
                        .or_else(|| object.get("user_id"))
                        .and_then(provider_value_to_i64);
                }
                object.values().find_map(|value| search(value, username))
            }
            Value::Array(values) => values.iter().find_map(|value| search(value, username)),
            _ => None,
        }
    }
    search(payload, username)
}

fn provider_value_to_i64(value: &Value) -> Option<i64> {
    value
        .as_i64()
        .or_else(|| value.as_u64().and_then(|value| i64::try_from(value).ok()))
        .or_else(|| value.as_str().and_then(|value| value.trim().parse().ok()))
}

fn extract_router_token_info(
    payload: &Value,
    token_name: &str,
) -> Result<Option<RouterTokenMatch>, String> {
    fn search(value: &Value, token_name: &str, matches: &mut Vec<RouterTokenMatch>) {
        match value {
            Value::Object(object) => {
                let object_name = object.get("name").and_then(Value::as_str).map(str::trim);
                if object_name == Some(token_name) {
                    if let Some(token_id) = object
                        .get("id")
                        .or_else(|| object.get("tokenId"))
                        .or_else(|| object.get("token_id"))
                        .and_then(provider_value_to_string)
                    {
                        matches.push(RouterTokenMatch {
                            id: token_id,
                            group: object
                                .get("group")
                                .or_else(|| object.get("groupName"))
                                .and_then(Value::as_str)
                                .map(str::trim)
                                .filter(|group| !group.is_empty())
                                .map(str::to_string),
                        });
                    }
                    return;
                }
                for value in object.values() {
                    search(value, token_name, matches);
                }
            }
            Value::Array(values) => {
                for value in values {
                    search(value, token_name, matches);
                }
            }
            _ => {}
        }
    }
    let mut matches = Vec::new();
    search(payload, token_name, &mut matches);
    matches.sort_by(|left, right| left.id.cmp(&right.id));
    matches.dedup();
    let mut ids = matches
        .iter()
        .map(|token| token.id.as_str())
        .collect::<Vec<_>>();
    ids.sort_unstable();
    ids.dedup();
    match ids.as_slice() {
        [] => Ok(None),
        [token_id] => {
            let groups = matches
                .iter()
                .filter(|token| token.id == *token_id)
                .filter_map(|token| token.group.as_deref())
                .collect::<Vec<_>>();
            if groups.windows(2).any(|window| window[0] != window[1]) {
                return Err(format!(
                    "固定 Token 标识 {token_name} 对应同一 id 但分组不一致"
                ));
            }
            Ok(matches.iter().find(|token| token.id == *token_id).cloned())
        }
        _ => Err(format!(
            "固定 Token 标识 {token_name} 对应多个不同 token id"
        )),
    }
}

fn extract_router_token_id(payload: &Value, token_name: &str) -> Result<Option<String>, String> {
    extract_router_token_info(payload, token_name).map(|token| token.map(|token| token.id))
}

fn provider_payload_data(value: &Value) -> &Value {
    value.get("data").unwrap_or(value)
}

/// A 4xx response is a deterministic rejection and may be retried with the
/// same durable account intent. A 3xx/5xx response is not safe to interpret as
/// a failed provisioning operation because the remote side may have committed
/// the account before the response was lost or redirected; keep it in
/// reconciliation instead of registering another account.
fn router_http_failure_requires_reconciliation(status: reqwest::StatusCode) -> bool {
    !status.is_client_error()
}

fn is_deterministic_router_credential_error(message: &str) -> bool {
    let normalized = message.to_ascii_lowercase();
    normalized.contains("field validation")
        && (normalized.contains("username")
            || normalized.contains("password")
            || normalized.contains("display_name"))
        && (normalized.contains("max") || normalized.contains("min"))
}

fn provider_payload_failed(value: &Value) -> bool {
    value
        .get("success")
        .and_then(Value::as_bool)
        .is_some_and(|success| !success)
        || value
            .get("ok")
            .and_then(Value::as_bool)
            .is_some_and(|ok| !ok)
        || value
            .get("code")
            .and_then(provider_value_to_i64)
            .is_some_and(|code| code != 0 && code != 200)
}

fn provider_payload_error_suffix(value: &Value) -> String {
    extract_provider_string(value, &["message", "error", "msg"])
        .map(|message| format!("：{message}"))
        .unwrap_or_default()
}

fn extract_provider_string(value: &Value, keys: &[&str]) -> Option<String> {
    let data = provider_payload_data(value);
    if let Some(result) = keys
        .iter()
        .find_map(|key| data.get(*key).and_then(provider_value_to_string))
    {
        return Some(result);
    }

    // New API uses both object envelopes (`data: { key: ... }`) and direct
    // string envelopes (`data: "opaque-key"`) depending on the endpoint and
    // version.  A direct string is only accepted for callers that explicitly
    // requested a scalar credential/id field, never for arbitrary messages.
    if data.is_string()
        && keys.iter().any(|key| {
            matches!(
                *key,
                "token"
                    | "accessToken"
                    | "access_token"
                    | "userToken"
                    | "apiKey"
                    | "api_key"
                    | "key"
                    | "id"
                    | "tokenId"
                    | "token_id"
            )
        })
    {
        return provider_value_to_string(data);
    }

    None
}

fn provider_value_to_string(value: &Value) -> Option<String> {
    match value {
        Value::String(value) => Some(value.trim().to_string()),
        Value::Number(value) => Some(value.to_string()),
        _ => None,
    }
    .filter(|value| !value.is_empty())
}

fn derive_llm_router_key_id(owner_user_id: &str, route_origin: &str) -> String {
    let fingerprint = Sha256::digest(
        format!(
            "{}\n{}",
            owner_user_id.trim(),
            route_origin.trim_end_matches('/')
        )
        .as_bytes(),
    );
    format!(
        "{EXTERNAL_API_KEY_ID_PREFIX}llm-router-{}",
        &hex::encode(fingerprint)[..32]
    )
}

fn derive_llm_router_account_key(owner_user_id: &str, route_origin: &str) -> String {
    let fingerprint = Sha256::digest(
        format!(
            "llm-router-account\n{}\n{}",
            owner_user_id.trim(),
            route_origin.trim_end_matches('/')
        )
        .as_bytes(),
    );
    format!("llm-router-account-{}", &hex::encode(fingerprint)[..40])
}

fn hash_llm_router_key(owner_user_id: &str, key_id: &str, raw_key: &str) -> String {
    // LLM Router rows are server-owned credentials and are never authenticated through
    // the public external-key endpoint. Bind the uniqueness hash to owner and
    // row id so each deterministic provisioning generation has one local row.
    hash_external_api_key(&format!("llm-router:{owner_user_id}:{key_id}:{raw_key}"))
}

fn normalize_router_api_key(value: &str) -> Result<String, String> {
    let value = value.trim();
    if value.is_empty()
        || value.len() > 1024
        || value
            .chars()
            .any(|character| character.is_whitespace() || character.is_control())
    {
        return Err("LLM Router 返回的 API Key 格式无效".to_string());
    }
    Ok(value.to_string())
}

/// Preserve the opaque key returned by Router.  Key prefixes are owned by the
/// Router deployment; api-server must not invent or rewrite one.
fn normalize_new_api_relay_api_key(value: &str) -> Result<String, String> {
    normalize_router_api_key(value)
}

fn encrypt_router_credential_secret(
    secret_payload: &RouterCredentialSecret,
    secret: &str,
) -> Result<String, String> {
    let payload = serde_json::to_vec(secret_payload)
        .map_err(|error| format!("LLM Router 账号凭据序列化失败：{error}"))?;
    encrypt_router_secret_payload(payload.as_slice(), secret)
}

fn encrypt_router_secret_payload(payload: &[u8], secret: &str) -> Result<String, String> {
    let key_material = Sha256::digest(secret.trim().as_bytes());
    let unbound = aead::UnboundKey::new(&aead::AES_256_GCM, key_material.as_ref())
        .map_err(|_| "LLM Router API Key 加密密钥无效".to_string())?;
    let key = aead::LessSafeKey::new(unbound);
    let mut nonce_bytes = [0_u8; aead::NONCE_LEN];
    SystemRandom::new()
        .fill(&mut nonce_bytes)
        .map_err(|_| "LLM Router API Key 随机数生成失败".to_string())?;
    let nonce = aead::Nonce::assume_unique_for_key(nonce_bytes);
    let mut encrypted_payload = payload.to_vec();
    key.seal_in_place_append_tag(nonce, aead::Aad::empty(), &mut encrypted_payload)
        .map_err(|_| "LLM Router API Key 加密失败".to_string())?;
    let mut encoded = nonce_bytes.to_vec();
    encoded.extend_from_slice(&encrypted_payload);
    Ok(STANDARD_NO_PAD.encode(encoded))
}

pub(crate) fn decrypt_router_api_key(ciphertext: &str, secret: &str) -> Result<String, String> {
    let plaintext = decrypt_router_secret_payload(ciphertext, secret)?;
    if let Ok(bundle) = serde_json::from_slice::<RouterCredentialSecret>(&plaintext) {
        return normalize_router_api_key(bundle.api_key.as_str());
    }
    normalize_router_api_key(
        std::str::from_utf8(&plaintext).map_err(|_| "LLM Router API Key 编码无效".to_string())?,
    )
}

fn decrypt_router_credential_secret(
    ciphertext: &str,
    secret: &str,
) -> Result<RouterCredentialSecret, String> {
    let plaintext = decrypt_router_secret_payload(ciphertext, secret)?;
    let bundle = serde_json::from_slice::<RouterCredentialSecret>(&plaintext)
        .map_err(|_| "LLM Router 账号凭据格式无效".to_string())?;
    normalize_router_api_key(bundle.api_key.as_str())?;
    Ok(bundle)
}

fn decrypt_router_credential_secret_allow_pending(
    ciphertext: &str,
    secret: &str,
) -> Result<RouterCredentialSecret, String> {
    let plaintext = decrypt_router_secret_payload(ciphertext, secret)?;
    let bundle = serde_json::from_slice::<RouterCredentialSecret>(&plaintext)
        .map_err(|_| "LLM Router 账号凭据格式无效".to_string())?;
    if bundle.api_key.trim().is_empty()
        && (bundle.username.as_deref().unwrap_or("").trim().is_empty()
            || bundle.password.as_deref().unwrap_or("").trim().is_empty())
    {
        return Err("LLM Router 待完成账号凭据缺少用户名或密码".to_string());
    }
    if !bundle.api_key.trim().is_empty() {
        normalize_router_api_key(bundle.api_key.as_str())?;
    }
    Ok(bundle)
}

fn decrypt_router_secret_payload(ciphertext: &str, secret: &str) -> Result<Vec<u8>, String> {
    let mut encoded = STANDARD_NO_PAD
        .decode(ciphertext.trim())
        .map_err(|_| "LLM Router API Key 密文格式无效".to_string())?;
    if encoded.len() < aead::NONCE_LEN + 16 {
        return Err("LLM Router API Key 密文长度无效".to_string());
    }
    let nonce_bytes: [u8; aead::NONCE_LEN] = encoded[..aead::NONCE_LEN]
        .try_into()
        .map_err(|_| "LLM Router API Key nonce 无效".to_string())?;
    let nonce = aead::Nonce::assume_unique_for_key(nonce_bytes);
    let payload = &mut encoded[aead::NONCE_LEN..];
    let key_material = Sha256::digest(secret.trim().as_bytes());
    let unbound = aead::UnboundKey::new(&aead::AES_256_GCM, key_material.as_ref())
        .map_err(|_| "LLM Router API Key 解密密钥无效".to_string())?;
    let key = aead::LessSafeKey::new(unbound);
    let plaintext = key
        .open_in_place(nonce, aead::Aad::empty(), payload)
        .map_err(|_| "LLM Router API Key 解密失败".to_string())?;
    Ok(plaintext.to_vec())
}

pub async fn revoke_external_api_key(
    State(state): State<AppState>,
    Path(key_id): Path<String>,
    Extension(request_context): Extension<RequestContext>,
    Extension(authenticated): Extension<AuthenticatedAccessToken>,
) -> Result<Json<Value>, AppError> {
    let key = state
        .spacetime_client()
        .revoke_external_api_key(ExternalApiKeyRevokeRecordInput {
            key_id,
            owner_user_id: authenticated.claims().user_id().to_string(),
            revoked_at_micros: current_utc_micros(),
        })
        .await
        .map_err(map_external_api_key_error)?;

    Ok(json_success_body(
        Some(&request_context),
        ExternalApiKeyResponse {
            key: external_api_key_payload_from_record(key),
        },
    ))
}

pub(crate) fn hash_external_api_key(raw_key: &str) -> String {
    hash_refresh_session_token(raw_key)
}

pub(crate) fn default_external_api_key_scopes() -> Vec<String> {
    EXTERNAL_API_KEY_SCOPES
        .iter()
        .map(|scope| (*scope).to_string())
        .collect()
}

fn generate_external_api_key_secret() -> String {
    format!(
        "{EXTERNAL_API_KEY_SECRET_PREFIX}{}.{}",
        new_uuid_simple_string(),
        new_uuid_simple_string()
    )
}

fn external_api_key_prefix(raw_key: &str) -> String {
    raw_key
        .chars()
        .take(EXTERNAL_API_KEY_PREFIX_VISIBLE_CHARS)
        .collect()
}

fn external_api_key_payload_from_record(record: ExternalApiKeyRecord) -> ExternalApiKeyPayload {
    ExternalApiKeyPayload {
        key_id: record.key_id,
        name: record.name,
        key_prefix: record.key_prefix,
        scopes: record.scopes,
        created_at: record.created_at,
        last_used_at: record.last_used_at,
        revoked_at: record.revoked_at,
        updated_at: record.updated_at,
    }
}

fn external_api_key_payload_from_router_account(
    account: LlmRouterAccountRecord,
) -> ExternalApiKeyPayload {
    ExternalApiKeyPayload {
        key_id: account.key_id,
        name: account.key_name,
        key_prefix: account.key_prefix.unwrap_or_default(),
        scopes: LLM_ROUTER_API_KEY_SCOPES
            .iter()
            .map(|scope| (*scope).to_string())
            .collect(),
        created_at: account.created_at,
        last_used_at: account.last_used_at,
        revoked_at: account.revoked_at,
        updated_at: account.updated_at,
    }
}

pub(crate) fn map_external_api_key_error(error: SpacetimeClientError) -> AppError {
    match error {
        SpacetimeClientError::Procedure(message)
            if message.contains("不存在") || message.contains("已失效") =>
        {
            AppError::from_status(StatusCode::UNAUTHORIZED).with_details(json!({
                "provider": "external-api-key",
                "message": message,
            }))
        }
        SpacetimeClientError::Procedure(message) if message.contains("无权") => {
            AppError::from_status(StatusCode::FORBIDDEN).with_details(json!({
                "provider": "external-api-key",
                "message": message,
            }))
        }
        SpacetimeClientError::Runtime(message) | SpacetimeClientError::Procedure(message) => {
            AppError::from_status(StatusCode::BAD_REQUEST).with_details(json!({
                "provider": "external-api-key",
                "message": message,
            }))
        }
        other => AppError::from_status(StatusCode::BAD_GATEWAY).with_details(json!({
            "provider": "spacetimedb",
            "message": other.to_string(),
        })),
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use std::{
        io::{Read, Write},
        net::{TcpListener, TcpStream},
        sync::{Arc, Mutex},
        thread,
        time::Duration,
    };

    use crate::{config::AppConfig, state::AppState};

    #[test]
    fn generated_external_api_key_uses_public_prefix_only_for_display() {
        let raw_key = generate_external_api_key_secret();
        let key_prefix = external_api_key_prefix(raw_key.as_str());

        assert!(raw_key.starts_with(EXTERNAL_API_KEY_SECRET_PREFIX));
        assert_eq!(
            key_prefix.chars().count(),
            EXTERNAL_API_KEY_PREFIX_VISIBLE_CHARS
        );
        assert!(raw_key.starts_with(key_prefix.as_str()));
        assert_ne!(hash_external_api_key(raw_key.as_str()), raw_key);
    }

    #[test]
    fn router_api_key_accepts_provider_owned_opaque_formats() {
        assert_eq!(
            normalize_router_api_key(" sk-eNuq-test-key ").expect("sk key should be accepted"),
            "sk-eNuq-test-key"
        );
        assert_eq!(
            normalize_router_api_key("tnr_sk_fixture_123").expect("tnr key should remain accepted"),
            "tnr_sk_fixture_123"
        );
        assert!(normalize_router_api_key(" ").is_err());
        assert!(normalize_router_api_key("router-key\nwith-newline").is_err());
    }

    #[test]
    fn new_api_relay_key_preserves_router_owned_opaque_format() {
        assert_eq!(
            normalize_new_api_relay_api_key("raw-router-token").unwrap(),
            "raw-router-token"
        );
        assert_eq!(
            normalize_new_api_relay_api_key(" sk-already-prefixed ").unwrap(),
            "sk-already-prefixed"
        );
    }

    #[test]
    fn new_api_token_request_is_unlimited_and_bound_to_default_group() {
        let payload = router_token_request();

        assert_eq!(payload["name"], LLM_ROUTER_TOKEN_IDENTIFIER);
        assert_eq!(payload["expired_time"], -1);
        assert_eq!(payload["unlimited_quota"], true);
        assert_eq!(payload["group"], "default");
        assert!(payload.get("idempotencyKey").is_none());
    }

    #[test]
    fn router_subscription_renews_when_missing_expired_or_within_one_day() {
        let now = 1_700_000_000;
        assert!(subscription_requires_renewal(&[], now));
        assert!(subscription_requires_renewal(
            &[RouterSubscriptionSummary {
                plan_id: LLM_ROUTER_SUBSCRIPTION_PLAN_ID,
                status: "expired".to_string(),
                end_time: now + 10 * 24 * 60 * 60,
            }],
            now,
        ));
        assert!(subscription_requires_renewal(
            &[RouterSubscriptionSummary {
                plan_id: LLM_ROUTER_SUBSCRIPTION_PLAN_ID,
                status: "active".to_string(),
                end_time: now + 24 * 60 * 60,
            }],
            now,
        ));
        assert!(!subscription_requires_renewal(
            &[RouterSubscriptionSummary {
                plan_id: LLM_ROUTER_SUBSCRIPTION_PLAN_ID,
                status: "active".to_string(),
                end_time: now + 24 * 60 * 60 + 1,
            }],
            now,
        ));
        assert!(subscription_requires_renewal(
            &[RouterSubscriptionSummary {
                plan_id: 99,
                status: "active".to_string(),
                end_time: now + 365 * 24 * 60 * 60,
            }],
            now,
        ));
    }

    #[test]
    fn router_subscription_payload_reads_new_api_summary_envelope() {
        let payload = json!({
            "success": true,
            "data": [
                {"subscription": {
                    "plan_id": 1,
                    "status": "active",
                    "start_time": 1700000000,
                    "end_time": 1800000000
                }}
            ]
        });
        assert_eq!(
            extract_router_subscriptions(&payload),
            vec![RouterSubscriptionSummary {
                plan_id: 1,
                status: "active".to_string(),
                end_time: 1800000000,
            }]
        );
    }

    #[test]
    fn existing_router_token_group_is_normalized_to_default() {
        let payload = router_token_update_request(77);

        assert_eq!(payload["id"], 77);
        assert_eq!(payload["name"], LLM_ROUTER_TOKEN_IDENTIFIER);
        assert_eq!(payload["expired_time"], -1);
        assert_eq!(payload["unlimited_quota"], true);
        assert_eq!(payload["group"], "default");
    }

    #[test]
    fn duplicate_fixed_router_tokens_require_reconciliation() {
        let payload = json!({
            "data": [
                {"id": 77, "name": LLM_ROUTER_TOKEN_IDENTIFIER},
                {"id": 88, "name": LLM_ROUTER_TOKEN_IDENTIFIER}
            ]
        });

        let error = extract_router_token_id(&payload, LLM_ROUTER_TOKEN_IDENTIFIER)
            .expect_err("multiple fixed-name tokens must be rejected");
        assert!(error.contains("多个不同 token id"));

        let duplicate_same_id = json!({
            "data": [
                {"id": 77, "name": LLM_ROUTER_TOKEN_IDENTIFIER},
                {"id": 77, "name": LLM_ROUTER_TOKEN_IDENTIFIER}
            ]
        });
        assert_eq!(
            extract_router_token_id(&duplicate_same_id, LLM_ROUTER_TOKEN_IDENTIFIER)
                .expect("same token repeated in an envelope is not ambiguous"),
            Some("77".to_string())
        );
    }

    #[test]
    fn new_api_user_update_uses_numeric_id_and_fixed_group() {
        let payload = router_user_update_request(42, "router_abcd", "user_full-id");

        assert_eq!(payload["id"], 42);
        assert_eq!(payload["username"], "router_abcd");
        assert_eq!(payload["remark"], "user_full-id");
        assert_eq!(payload["group"], "taonier");
        assert_eq!(payload["role"], 1);
        assert!(
            payload["display_name"]
                .as_str()
                .is_some_and(|value| value.contains("abcd"))
        );
    }

    #[tokio::test]
    async fn new_api_provisioning_uses_admin_user_flow_and_preserves_opaque_key() {
        let username = router_username_for_owner("owner-1");
        let password =
            generate_router_account_password("owner-1").expect("Router password should derive");
        let (base_url, captured) = spawn_new_api_provisioning_mock(username.clone());
        let state = AppState::new(AppConfig {
            llm_router_base_url: base_url,
            llm_router_admin_token: Some("admin-secret".to_string()),
            ..AppConfig::default()
        })
        .expect("state should build");

        let pending_login = RouterAccountLogin {
            username: username.clone(),
            password: password.clone(),
        };
        let provisioned =
            provision_router_account_via_new_api(&state, "owner-1", None, Some(&pending_login))
                .await
                .expect("New API provisioning should succeed");

        assert_eq!(provisioned.raw_key, "opaque-router-key");
        assert_eq!(provisioned.provider_account_id, username);
        assert_eq!(
            provisioned.router_username.as_deref(),
            Some(username.as_str())
        );
        assert!(provisioned.router_password.is_some());

        let requests = captured.lock().expect("captured requests lock").clone();
        assert_eq!(requests.len(), 11);
        assert!(requests[0].starts_with("GET /api/user/search?keyword="));
        assert!(requests[1].starts_with("POST /api/user/ HTTP/1.1"));
        assert!(requests[2].starts_with("GET /api/user/search?keyword="));
        assert!(requests[3].starts_with("PUT /api/user/ HTTP/1.1"));
        assert!(requests[4].starts_with("POST /api/user/login HTTP/1.1"));
        assert!(
            requests[5].starts_with("GET /api/subscription/admin/users/42/subscriptions HTTP/1.1")
        );
        assert!(
            requests[6].starts_with("POST /api/subscription/admin/users/42/subscriptions HTTP/1.1")
        );
        assert!(requests[7].starts_with("GET /api/token/search?keyword="));
        assert!(requests[8].starts_with("POST /api/token/ HTTP/1.1"));
        assert!(requests[9].starts_with("PUT /api/token/ HTTP/1.1"));
        assert!(requests[10].starts_with("POST /api/token/77/key HTTP/1.1"));

        assert!(
            requests[0]
                .lines()
                .any(|line| line.eq_ignore_ascii_case("authorization: Bearer admin-secret"))
        );
        assert!(
            requests[1]
                .lines()
                .any(|line| line.eq_ignore_ascii_case("authorization: Bearer admin-secret"))
        );
        assert!(
            requests[2]
                .lines()
                .any(|line| line.eq_ignore_ascii_case("authorization: Bearer admin-secret"))
        );

        let create_body = request_body(&requests[1]);
        let create_payload: Value = serde_json::from_str(create_body).expect("create json");
        assert_eq!(create_payload["username"], username);
        assert_eq!(create_payload["password"], password);
        assert_eq!(create_payload["role"], 1);
        assert!(
            create_payload["remark"]
                .as_str()
                .is_some_and(|value| value == "owner-1")
        );
        assert!(
            create_payload["password"]
                .as_str()
                .is_some_and(|value| value.len() <= 20)
        );

        let update_payload: Value =
            serde_json::from_str(request_body(&requests[3])).expect("update json");
        assert_eq!(update_payload["id"], 42);
        assert_eq!(update_payload["remark"], "owner-1");
        assert_eq!(update_payload["group"], "taonier");
        assert_eq!(update_payload["role"], 1);

        let token_payload: Value =
            serde_json::from_str(request_body(&requests[8])).expect("token json");
        assert_eq!(token_payload["unlimited_quota"], true);
        assert_eq!(token_payload["expired_time"], -1);
        assert_eq!(token_payload["group"], "default");

        let token_update_payload: Value =
            serde_json::from_str(request_body(&requests[9])).expect("token update json");
        assert_eq!(token_update_payload["id"], 77);
        assert_eq!(token_update_payload["unlimited_quota"], true);
        assert_eq!(token_update_payload["expired_time"], -1);
        assert_eq!(token_update_payload["group"], "default");

        assert!(
            requests[7]
                .lines()
                .any(|line| line.eq_ignore_ascii_case("authorization: Bearer router-login-token"))
        );
        assert!(
            requests[8]
                .lines()
                .any(|line| line.eq_ignore_ascii_case("authorization: Bearer router-login-token"))
        );
        assert!(
            requests[10]
                .lines()
                .any(|line| line.eq_ignore_ascii_case("authorization: Bearer router-login-token"))
        );
        assert!(
            requests[5]
                .lines()
                .any(|line| line.eq_ignore_ascii_case("authorization: Bearer admin-secret"))
        );
        assert!(
            requests[6]
                .lines()
                .any(|line| line.eq_ignore_ascii_case("authorization: Bearer admin-secret"))
        );
        let subscription_payload: Value =
            serde_json::from_str(request_body(&requests[6])).expect("subscription json");
        assert_eq!(
            subscription_payload["plan_id"],
            LLM_ROUTER_SUBSCRIPTION_PLAN_ID
        );
    }

    #[tokio::test]
    async fn missing_local_account_recovers_existing_router_user_and_reuses_token() {
        let username = router_username_for_owner("owner-recover");
        let (base_url, captured) = spawn_existing_router_account_mock(username.clone());
        let state = AppState::new(AppConfig {
            llm_router_base_url: base_url,
            llm_router_admin_token: Some("admin-secret".to_string()),
            ..AppConfig::default()
        })
        .expect("state should build");
        let pending_login = RouterAccountLogin {
            username: username.clone(),
            password: generate_router_account_password("owner-recover")
                .expect("password should derive"),
        };

        let provisioned = provision_router_account_via_new_api(
            &state,
            "owner-recover",
            None,
            Some(&pending_login),
        )
        .await
        .expect("existing Router account should be recovered");

        assert_eq!(provisioned.raw_key, "recovered-router-key");
        assert_eq!(provisioned.provider_account_id, username);
        let requests = captured.lock().expect("captured requests lock").clone();
        assert_eq!(requests.len(), 7);
        assert!(requests[0].starts_with("GET /api/user/search?keyword="));
        assert!(requests[1].starts_with("PUT /api/user/ HTTP/1.1"));
        assert!(requests[2].starts_with("POST /api/user/login HTTP/1.1"));
        assert!(
            requests[3].starts_with("GET /api/subscription/admin/users/42/subscriptions HTTP/1.1")
        );
        assert!(requests[4].starts_with("GET /api/token/search?keyword="));
        assert!(requests[5].starts_with("PUT /api/token/ HTTP/1.1"));
        assert!(requests[6].starts_with("POST /api/token/77/key HTTP/1.1"));
        let update_payload: Value =
            serde_json::from_str(request_body(&requests[1])).expect("update json");
        assert_eq!(update_payload["id"], 42);
        assert_eq!(update_payload["username"], username);
        assert_eq!(update_payload["group"], "taonier");
        assert_eq!(update_payload["role"], 1);
        let token_update_payload: Value =
            serde_json::from_str(request_body(&requests[5])).expect("token update json");
        assert_eq!(token_update_payload["id"], 77);
        assert_eq!(token_update_payload["group"], "default");
        assert!(
            !requests
                .iter()
                .any(|request| request.starts_with("POST /api/user/ HTTP/1.1"))
        );
        assert!(
            !requests
                .iter()
                .any(|request| request.starts_with("POST /api/token/ HTTP/1.1"))
        );
    }

    #[tokio::test]
    async fn active_router_key_repair_keeps_user_taonier_and_token_default() {
        let owner_user_id = "owner-active-repair";
        let username = router_username_for_owner(owner_user_id);
        let password =
            generate_router_account_password(owner_user_id).expect("password should derive");
        let (base_url, captured) = spawn_active_router_contract_mock(username.clone());
        let state = AppState::new(AppConfig {
            llm_router_base_url: base_url.clone(),
            llm_router_admin_token: Some("admin-secret".to_string()),
            llm_router_api_key_encryption_secret: Some("fixture-encryption-secret".to_string()),
            ..AppConfig::default()
        })
        .expect("state should build");
        let ciphertext = encrypt_router_credential_secret(
            &RouterCredentialSecret {
                version: 1,
                api_key: "existing-router-key".to_string(),
                username: Some(username.clone()),
                password: Some(password),
                access_token: None,
            },
            "fixture-encryption-secret",
        )
        .expect("credential should encrypt");
        let account = LlmRouterAccountRecord {
            account_key: "fixture-account".to_string(),
            owner_user_id: owner_user_id.to_string(),
            route_origin: base_url.trim_end_matches('/').to_string(),
            idempotency_key: "key-active".to_string(),
            router_account_id: Some("42".to_string()),
            credential_ciphertext: Some(ciphertext),
            account_json: Some(json!({"routerUserId": 42, "username": username}).to_string()),
            status: "active".to_string(),
            attempt_count: 0,
            lease_until_micros: None,
            next_retry_at_micros: None,
            last_error: None,
            credential_version: 1,
            created_at: "2026-08-29T00:00:00Z".to_string(),
            updated_at: "2026-08-29T00:00:00Z".to_string(),
            key_id: "key-active".to_string(),
            key_name: LLM_ROUTER_TOKEN_IDENTIFIER.to_string(),
            key_prefix: Some("tnr_sk_fixture".to_string()),
            key_hash: None,
            last_used_at: None,
            revoked_at: None,
        };
        ensure_existing_llm_router_account_contract(&state, &account)
            .await
            .expect("active Router contract should repair");

        let requests = captured.lock().expect("captured requests lock").clone();
        assert_eq!(requests.len(), 7);
        assert!(requests[0].starts_with("GET /api/user/search?keyword="));
        assert!(requests[1].starts_with("PUT /api/user/ HTTP/1.1"));
        assert!(requests[2].starts_with("POST /api/user/login HTTP/1.1"));
        assert!(requests[3].starts_with("GET /api/token/search?keyword="));
        assert!(requests[4].starts_with("PUT /api/token/ HTTP/1.1"));
        assert!(
            requests[5].starts_with("GET /api/subscription/admin/users/42/subscriptions HTTP/1.1")
        );
        assert!(
            requests[6].starts_with("POST /api/subscription/admin/users/42/subscriptions HTTP/1.1")
        );

        let user_payload: Value =
            serde_json::from_str(request_body(&requests[1])).expect("user update json");
        assert_eq!(user_payload["group"], "taonier");
        assert_eq!(user_payload["remark"], owner_user_id);

        let token_payload: Value =
            serde_json::from_str(request_body(&requests[4])).expect("token update json");
        assert_eq!(token_payload["group"], "default");
        assert_eq!(token_payload["unlimited_quota"], true);
        assert_eq!(token_payload["expired_time"], -1);

        let subscription_payload: Value =
            serde_json::from_str(request_body(&requests[6])).expect("subscription json");
        assert_eq!(
            subscription_payload["plan_id"],
            LLM_ROUTER_SUBSCRIPTION_PLAN_ID
        );
    }

    #[tokio::test]
    async fn router_provisioning_requires_admin_token_for_subscription_guarantee() {
        let base_url = "http://127.0.0.1:3100/v1".to_string();
        let state = AppState::new(AppConfig {
            llm_router_base_url: base_url,
            llm_router_admin_token: None,
            ..AppConfig::default()
        })
        .expect("state should build");
        let pending_login = RouterAccountLogin {
            username: router_username_for_owner("owner-no-admin"),
            password: "stable-password".to_string(),
        };

        let result = provision_router_account_via_new_api(
            &state,
            "owner-no-admin",
            None,
            Some(&pending_login),
        )
        .await;
        let error = match result {
            Ok(_) => panic!("provisioning must not bypass subscription checks"),
            Err(error) => error,
        };
        assert!(error.contains("管理员 Token 未配置"));
    }

    #[test]
    fn router_account_credentials_are_stable_per_owner_across_routes() {
        let first = generate_router_account_password("owner-1").expect("password should derive");
        let same = generate_router_account_password(" owner-1 ").expect("password should derive");
        let different_owner =
            generate_router_account_password("owner-2").expect("password should derive");

        assert_eq!(first, same);
        assert_ne!(first, different_owner);
        // New API 的 User.Username/User.Password 字段校验是 20 字符上限，
        // 因此派生值必须保持短且确定：`agc_user_` + 11 字符 = 20，
        // 密码为 20 位 hex，且二者都基于完整 owner id。
        let username = router_username_for_owner("owner-1");
        assert!(username.starts_with("agc_user_"));
        assert_eq!(username.len(), 20);
        assert_ne!(router_username_for_owner("owner-2"), username);
        assert_ne!(router_username_for_owner("other-owner"), username);
        assert_eq!(first.len(), 20);
    }

    #[test]
    fn default_external_api_key_scopes_cover_editor_openapi_v1() {
        let scopes = default_external_api_key_scopes();

        assert_eq!(
            scopes,
            vec![
                "editor:project".to_string(),
                "editor:canvas".to_string(),
                "editor:image-generate".to_string(),
                "editor:asset".to_string(),
            ]
        );
    }

    #[test]
    fn router_credential_bundle_round_trip_keeps_password_server_side() {
        let bundle = RouterCredentialSecret {
            version: 1,
            api_key: "sk-router-test".to_string(),
            username: Some("router_user".to_string()),
            password: Some("Router-random-password".to_string()),
            access_token: None,
        };
        let ciphertext = encrypt_router_credential_secret(&bundle, "test-secret")
            .expect("credential bundle should encrypt");
        assert_eq!(
            decrypt_router_api_key(&ciphertext, "test-secret").unwrap(),
            "sk-router-test"
        );
        let plaintext = decrypt_router_secret_payload(&ciphertext, "test-secret")
            .expect("credential bundle should decrypt");
        let restored: RouterCredentialSecret =
            serde_json::from_slice(&plaintext).expect("credential bundle should be json");
        assert_eq!(restored.password.as_deref(), Some("Router-random-password"));
        assert!(!ciphertext.contains("Router-random-password"));
    }

    #[test]
    fn router_control_origin_removes_responses_path() {
        assert_eq!(
            router_control_origin("https://router.example/v1").unwrap(),
            "https://router.example"
        );
        assert!(router_control_origin("ftp://router.example/v1").is_err());
    }

    #[test]
    fn router_payload_success_and_key_extraction_accept_new_api_shapes() {
        let payload = json!({"success": true, "data": {"id": 42, "key": "sk-router"}});
        assert!(!provider_payload_failed(&payload));
        assert_eq!(
            extract_provider_string(&payload, &["id"]),
            Some("42".to_string())
        );
        assert_eq!(
            extract_provider_string(&payload, &["key"]),
            Some("sk-router".to_string())
        );
        assert!(provider_payload_failed(
            &json!({"success": false, "message": "denied"})
        ));
    }

    #[test]
    fn new_api_scalar_data_envelopes_are_supported_for_login_and_key_issuance() {
        assert_eq!(
            extract_provider_string(
                &json!({"success": true, "data": "router-login-token"}),
                &["token", "accessToken"]
            ),
            Some("router-login-token".to_string())
        );
        assert_eq!(
            extract_provider_string(
                &json!({"success": true, "data": "sk-router-key"}),
                &["apiKey", "key"]
            ),
            Some("sk-router-key".to_string())
        );
        assert_eq!(
            extract_provider_string(&json!("sk-router-plain-text"), &["apiKey", "key"]),
            Some("sk-router-plain-text".to_string())
        );
    }

    #[test]
    fn router_http_failures_mark_non_client_responses_as_uncertain() {
        assert!(!router_http_failure_requires_reconciliation(
            reqwest::StatusCode::BAD_REQUEST
        ));
        assert!(!router_http_failure_requires_reconciliation(
            reqwest::StatusCode::FORBIDDEN
        ));
        assert!(router_http_failure_requires_reconciliation(
            reqwest::StatusCode::MOVED_PERMANENTLY
        ));
        assert!(router_http_failure_requires_reconciliation(
            reqwest::StatusCode::BAD_GATEWAY
        ));
        assert!(router_http_failure_requires_reconciliation(
            reqwest::StatusCode::SERVICE_UNAVAILABLE
        ));
    }

    #[test]
    fn deterministic_router_credential_validation_errors_can_be_retried() {
        assert!(is_deterministic_router_credential_error(
            "Invalid input Key: 'User.Username' Error:Field validation for 'Username' failed on the 'max' tag"
        ));
        assert!(is_deterministic_router_credential_error(
            "Field validation for 'Password' failed on the 'min' tag"
        ));
        assert!(!is_deterministic_router_credential_error(
            "connection reset by peer"
        ));
        assert!(!is_deterministic_router_credential_error(
            "Router registration may have committed"
        ));
    }

    #[test]
    fn non_production_router_target_is_loopback_only() {
        let state = AppState::new(AppConfig {
            environment: "test".to_string(),
            llm_router_base_url: "https://router.genarrative.world/v1".to_string(),
            ..AppConfig::default()
        })
        .expect("test state should build");
        let error = ensure_llm_router_target_allowed(&state)
            .expect_err("test environment must reject the online Router target");
        assert!(error.contains("loopback"));

        let state = AppState::new(AppConfig {
            environment: "test".to_string(),
            llm_router_base_url: "http://127.0.0.1:3100/v1".to_string(),
            ..AppConfig::default()
        })
        .expect("test state should build");
        ensure_llm_router_target_allowed(&state)
            .expect("test environment should allow a loopback Router fixture");
    }

    #[test]
    fn production_router_target_requires_https_but_not_admin_token_for_reuse() {
        let state = AppState::new(AppConfig {
            environment: "production".to_string(),
            llm_router_base_url: "http://router.example/v1".to_string(),
            ..AppConfig::default()
        })
        .expect("test state should build");
        ensure_llm_router_target_allowed(&state)
            .expect_err("production Router control plane must use HTTPS");
    }

    fn spawn_new_api_provisioning_mock(username: String) -> (String, Arc<Mutex<Vec<String>>>) {
        let listener = TcpListener::bind("127.0.0.1:0").expect("mock listener should bind");
        let address = listener
            .local_addr()
            .expect("mock address should be available");
        let captured = Arc::new(Mutex::new(Vec::new()));
        let captured_for_thread = Arc::clone(&captured);

        thread::spawn(move || {
            let responses = vec![
                r#"{"success":true,"data":[]}"#.to_string(),
                "success".to_string(),
                format!(
                    r#"{{"success":true,"data":[{{"id":42,"username":"{}"}}]}}"#,
                    username
                ),
                "success".to_string(),
                r#"{"success":true,"data":{"token":"router-login-token"}}"#.to_string(),
                r#"{"success":true,"data":[]}"#.to_string(),
                "success".to_string(),
                r#"{"success":true,"data":[]}"#.to_string(),
                r#"{"success":true,"data":{"id":77}}"#.to_string(),
                "success".to_string(),
                r#"{"success":true,"data":{"key":"opaque-router-key"}}"#.to_string(),
            ];
            for response_body in responses {
                let (mut stream, _) = listener.accept().expect("mock request should connect");
                let request = read_http_request(&mut stream);
                captured_for_thread
                    .lock()
                    .expect("captured requests lock")
                    .push(request);
                write_http_response(&mut stream, response_body.as_str());
            }
        });

        (format!("http://{address}"), captured)
    }

    fn spawn_existing_router_account_mock(username: String) -> (String, Arc<Mutex<Vec<String>>>) {
        let listener = TcpListener::bind("127.0.0.1:0").expect("mock listener should bind");
        let address = listener
            .local_addr()
            .expect("mock address should be available");
        let captured = Arc::new(Mutex::new(Vec::new()));
        let captured_for_thread = Arc::clone(&captured);

        thread::spawn(move || {
            let responses = vec![
                format!(
                    r#"{{"success":true,"data":[{{"id":42,"username":"{}"}}]}}"#,
                    username
                ),
                "success".to_string(),
                r#"{"success":true,"data":{"token":"router-login-token"}}"#.to_string(),
                r#"{"success":true,"data":[{"subscription":{"plan_id":1,"status":"active","end_time":4102444800}}]}"#.to_string(),
                format!(
                    r#"{{"success":true,"data":[{{"id":77,"name":"{}","group":"taonier"}}]}}"#,
                    LLM_ROUTER_TOKEN_IDENTIFIER
                ),
                "success".to_string(),
                r#"{"success":true,"data":{"key":"recovered-router-key"}}"#.to_string(),
            ];
            for response_body in responses {
                let (mut stream, _) = listener.accept().expect("mock request should connect");
                let request = read_http_request(&mut stream);
                captured_for_thread
                    .lock()
                    .expect("captured requests lock")
                    .push(request);
                write_http_response(&mut stream, response_body.as_str());
            }
        });

        (format!("http://{address}"), captured)
    }

    fn spawn_active_router_contract_mock(username: String) -> (String, Arc<Mutex<Vec<String>>>) {
        let listener = TcpListener::bind("127.0.0.1:0").expect("mock listener should bind");
        let address = listener
            .local_addr()
            .expect("mock address should be available");
        let captured = Arc::new(Mutex::new(Vec::new()));
        let captured_for_thread = Arc::clone(&captured);

        thread::spawn(move || {
            let responses = vec![
                format!(
                    r#"{{"success":true,"data":[{{"id":42,"username":"{}"}}]}}"#,
                    username
                ),
                "success".to_string(),
                r#"{"success":true,"data":{"token":"router-login-token"}}"#.to_string(),
                format!(
                    r#"{{"success":true,"data":[{{"id":77,"name":"{}","group":"taonier"}}]}}"#,
                    LLM_ROUTER_TOKEN_IDENTIFIER
                ),
                "success".to_string(),
                r#"{"success":true,"data":[]}"#.to_string(),
                "success".to_string(),
            ];
            for response_body in responses {
                let (mut stream, _) = listener.accept().expect("mock request should connect");
                let request = read_http_request(&mut stream);
                captured_for_thread
                    .lock()
                    .expect("captured requests lock")
                    .push(request);
                write_http_response(&mut stream, response_body.as_str());
            }
        });

        (format!("http://{address}"), captured)
    }

    fn request_body(request: &str) -> &str {
        request
            .split_once("\r\n\r\n")
            .map(|(_, body)| body)
            .unwrap_or_default()
    }

    fn read_http_request(stream: &mut TcpStream) -> String {
        stream
            .set_read_timeout(Some(Duration::from_secs(2)))
            .expect("mock read timeout should set");
        let mut buffer = Vec::new();
        let mut chunk = [0_u8; 4096];
        let mut expected_total = None;
        loop {
            match stream.read(&mut chunk) {
                Ok(0) => break,
                Ok(read) => {
                    buffer.extend_from_slice(&chunk[..read]);
                    if expected_total.is_none()
                        && let Some(header_end) =
                            buffer.windows(4).position(|value| value == b"\r\n\r\n")
                    {
                        let header_end = header_end + 4;
                        let headers = String::from_utf8_lossy(&buffer[..header_end]);
                        let content_length = headers
                            .lines()
                            .find_map(|line| {
                                line.strip_prefix("Content-Length:")
                                    .or_else(|| line.strip_prefix("content-length:"))
                            })
                            .and_then(|value| value.trim().parse::<usize>().ok())
                            .unwrap_or(0);
                        expected_total = Some(header_end + content_length);
                    }
                    if expected_total.is_some_and(|total| buffer.len() >= total) {
                        break;
                    }
                }
                Err(error)
                    if matches!(
                        error.kind(),
                        std::io::ErrorKind::WouldBlock | std::io::ErrorKind::TimedOut
                    ) =>
                {
                    break;
                }
                Err(error) => panic!("mock request read failed: {error}"),
            }
        }
        String::from_utf8_lossy(&buffer).into_owned()
    }

    fn write_http_response(stream: &mut TcpStream, body: &str) {
        let response = format!(
            "HTTP/1.1 200 OK\r\nContent-Type: application/json\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{}",
            body.len(),
            body
        );
        stream
            .write_all(response.as_bytes())
            .expect("mock response should write");
    }
}