use axum::http::{Method, StatusCode};
use module_auth::AuthLoginMethod;
use module_runtime::RuntimeTrackingScopeKind;
use serde_json::{Value, json};
use time::OffsetDateTime;
use uuid::Uuid;

use crate::{auth::AuthenticatedAccessToken, request_context::RequestContext, state::AppState};

/// 后端用户行为埋点入口统一走这里：写入失败只记录日志，不反向阻断主业务。
#[derive(Clone, Debug)]
pub struct TrackingEventDraft {
    pub event_key: &'static str,
    pub scope_kind: RuntimeTrackingScopeKind,
    pub scope_id: String,
    pub user_id: Option<String>,
    pub owner_user_id: Option<String>,
    pub profile_id: Option<String>,
    pub module_key: Option<&'static str>,
    pub metadata: Value,
}

impl TrackingEventDraft {
    pub fn new(event_key: &'static str, module_key: &'static str) -> Self {
        Self {
            event_key,
            scope_kind: RuntimeTrackingScopeKind::Site,
            scope_id: "site".to_string(),
            user_id: None,
            owner_user_id: None,
            profile_id: None,
            module_key: Some(module_key),
            metadata: json!({}),
        }
    }

    pub fn user(event_key: &'static str, module_key: &'static str, user_id: &str) -> Self {
        let normalized_user_id = user_id.trim().to_string();
        let mut draft = Self::new(event_key, module_key);
        draft.scope_kind = RuntimeTrackingScopeKind::User;
        draft.scope_id = normalized_user_id.clone();
        draft.user_id = Some(normalized_user_id.clone());
        draft.owner_user_id = Some(normalized_user_id);
        draft
    }
}

#[derive(Clone, Debug)]
struct RouteTrackingSpec {
    event_key: &'static str,
    module_key: &'static str,
    scope_kind: RuntimeTrackingScopeKind,
    scope_id: &'static str,
}

pub async fn record_route_tracking_event_after_success(
    state: &AppState,
    request_context: &RequestContext,
    method: &Method,
    path: &str,
    status: StatusCode,
    authenticated: Option<&AuthenticatedAccessToken>,
) {
    if !status.is_success() {
        return;
    }
    let Some(spec) = resolve_route_tracking_spec(method, path) else {
        return;
    };

    let user_id = authenticated.map(|auth| auth.claims().user_id().to_string());
    let scope_id = match spec.scope_kind {
        RuntimeTrackingScopeKind::User => {
            user_id.clone().unwrap_or_else(|| spec.scope_id.to_string())
        }
        RuntimeTrackingScopeKind::Site => spec.scope_id.to_string(),
        _ => spec.scope_id.to_string(),
    };
    let mut draft = TrackingEventDraft::new(spec.event_key, spec.module_key);
    draft.scope_kind = spec.scope_kind;
    draft.scope_id = scope_id;
    draft.user_id = user_id;
    draft.metadata = build_route_tracking_metadata(&spec, request_context, method, path, status);
    if draft.user_id.is_some() {
        draft.owner_user_id = draft.user_id.clone();
    }

    record_tracking_event_after_success(state, request_context, draft).await;
}

fn resolve_route_tracking_spec(method: &Method, path: &str) -> Option<RouteTrackingSpec> {
    use RuntimeTrackingScopeKind::{Site, User};

    // 后台、RPG、大鱼吃小鱼、Visual Novel、Story、Combat 明确排除，不走通用用户行为埋点。
    if path.starts_with("/admin/")
        || path.contains("/big-fish")
        || path.contains("/visual-novel")
        || path.contains("/story")
        || path.contains("/combat")
        || path.contains("/rpg")
        || path.starts_with("/api/runtime/chat/")
    {
        return None;
    }

    let route = normalize_route_path(path);
    match (method.as_str(), route.as_str()) {
        ("GET", "/api/auth/login-options") => {
            Some(route_spec("auth_login_options_view", "auth", Site, "site"))
        }
        ("POST", "/api/auth/phone/send-code") => {
            Some(route_spec("auth_phone_code_send", "auth", Site, "site"))
        }
        ("POST", "/api/auth/phone/login") => Some(route_spec(
            "auth_phone_login_success",
            "auth",
            User,
            "anonymous",
        )),
        ("GET", "/api/auth/me") => Some(route_spec("auth_me_view", "auth", User, "anonymous")),
        ("GET", "/api/auth/sessions") => {
            Some(route_spec("auth_sessions_view", "auth", User, "anonymous"))
        }
        ("POST", "/api/auth/sessions/{id}/revoke") => {
            Some(route_spec("auth_revoke_session", "auth", User, "anonymous"))
        }
        ("POST", "/api/auth/refresh") => {
            Some(route_spec("auth_refresh_success", "auth", Site, "site"))
        }
        ("POST", "/api/auth/logout") => Some(route_spec("auth_logout", "auth", User, "anonymous")),
        ("POST", "/api/auth/logout-all") => {
            Some(route_spec("auth_logout_all", "auth", User, "anonymous"))
        }
        ("POST", "/api/auth/wechat/bind-phone") => Some(route_spec(
            "auth_wechat_bind_phone_success",
            "auth",
            User,
            "anonymous",
        )),
        ("PATCH", "/api/profile/me") => Some(route_spec(
            "profile_identity_update",
            "profile",
            User,
            "anonymous",
        )),
        ("GET", "/api/profile/dashboard") => Some(route_spec(
            "profile_dashboard_view",
            "profile",
            User,
            "anonymous",
        )),
        ("GET", "/api/profile/wallet-ledger") => Some(route_spec(
            "wallet_ledger_view",
            "profile",
            User,
            "anonymous",
        )),
        ("GET", "/api/profile/recharge-center") => Some(route_spec(
            "recharge_center_view",
            "profile",
            User,
            "anonymous",
        )),
        ("POST", "/api/profile/recharge/orders") => Some(route_spec(
            "recharge_order_create",
            "profile",
            User,
            "anonymous",
        )),
        ("POST", "/api/profile/feedback") => {
            Some(route_spec("feedback_submit", "profile", User, "anonymous"))
        }
        ("GET", "/api/profile/referrals/invite-center") => Some(route_spec(
            "invite_center_view",
            "profile",
            User,
            "anonymous",
        )),
        ("POST", "/api/profile/referrals/redeem-code") => Some(route_spec(
            "referral_invite_code_redeem",
            "profile",
            User,
            "anonymous",
        )),
        ("POST", "/api/profile/redeem-codes/redeem") => Some(route_spec(
            "redeem_code_submit",
            "profile",
            User,
            "anonymous",
        )),
        ("GET", "/api/profile/tasks") => {
            Some(route_spec("task_center_view", "profile", User, "anonymous"))
        }
        ("POST", "/api/profile/tasks/{id}/claim") => Some(route_spec(
            "task_reward_claim",
            "profile",
            User,
            "anonymous",
        )),
        ("GET", "/api/profile/save-archives") => Some(route_spec(
            "save_archive_list_view",
            "profile",
            User,
            "anonymous",
        )),
        ("GET", "/api/profile/save-archives/{id}") => Some(route_spec(
            "save_archive_detail_view",
            "profile",
            User,
            "anonymous",
        )),
        ("GET", "/api/profile/browse-history") => Some(route_spec(
            "browse_history_view",
            "profile",
            User,
            "anonymous",
        )),
        ("POST", "/api/profile/browse-history") => Some(route_spec(
            "browse_history_record",
            "profile",
            User,
            "anonymous",
        )),
        ("DELETE", "/api/profile/browse-history") => Some(route_spec(
            "browse_history_clear",
            "profile",
            User,
            "anonymous",
        )),
        ("GET", "/api/profile/play-stats") => {
            Some(route_spec("play_stats_view", "profile", User, "anonymous"))
        }
        ("GET", "/api/profile/analytics/metric") => Some(route_spec(
            "profile_analytics_metric_view",
            "profile",
            User,
            "anonymous",
        )),
        ("POST", "/api/ai/tasks") => Some(route_spec("ai_task_create", "ai", User, "anonymous")),
        ("POST", "/api/ai/tasks/{id}/start") => {
            Some(route_spec("ai_task_start", "ai", User, "anonymous"))
        }
        ("POST", "/api/ai/tasks/{id}/stages/{id}/start") => {
            Some(route_spec("ai_task_stage_start", "ai", User, "anonymous"))
        }
        ("POST", "/api/ai/tasks/{id}/chunks") => {
            Some(route_spec("ai_task_chunk_append", "ai", User, "anonymous"))
        }
        ("POST", "/api/ai/tasks/{id}/stages/{id}/complete") => Some(route_spec(
            "ai_task_stage_complete",
            "ai",
            User,
            "anonymous",
        )),
        ("POST", "/api/ai/tasks/{id}/references") => Some(route_spec(
            "ai_task_reference_attach",
            "ai",
            User,
            "anonymous",
        )),
        ("POST", "/api/ai/tasks/{id}/complete") => {
            Some(route_spec("ai_task_complete", "ai", User, "anonymous"))
        }
        ("POST", "/api/ai/tasks/{id}/fail") => {
            Some(route_spec("ai_task_fail", "ai", User, "anonymous"))
        }
        ("POST", "/api/ai/tasks/{id}/cancel") => {
            Some(route_spec("ai_task_cancel", "ai", User, "anonymous"))
        }
        ("POST", "/api/assets/sts-upload-credentials") => Some(route_spec(
            "asset_sts_credentials_create",
            "asset",
            User,
            "anonymous",
        )),
        ("POST", "/api/assets/character-visual/generate") => Some(route_spec(
            "asset_character_visual_generate",
            "asset",
            User,
            "anonymous",
        )),
        ("POST", "/api/assets/character-visual/publish") => Some(route_spec(
            "asset_character_visual_publish",
            "asset",
            User,
            "anonymous",
        )),
        ("POST", "/api/assets/character-animation/generate") => Some(route_spec(
            "asset_character_animation_generate",
            "asset",
            User,
            "anonymous",
        )),
        ("POST", "/api/assets/character-animation/publish") => Some(route_spec(
            "asset_character_animation_publish",
            "asset",
            User,
            "anonymous",
        )),
        ("POST", "/api/assets/character-animation/import-video") => Some(route_spec(
            "asset_character_animation_import",
            "asset",
            User,
            "anonymous",
        )),
        ("POST", "/api/assets/character-workflow-cache") => Some(route_spec(
            "asset_character_workflow_cache_save",
            "asset",
            User,
            "anonymous",
        )),
        ("GET", "/api/assets/history") => {
            Some(route_spec("asset_history_view", "asset", User, "anonymous"))
        }
        ("POST", "/api/llm/chat/completions") => {
            Some(route_spec("llm_request", "llm", User, "anonymous"))
        }
        ("GET", "/api/speech/volcengine/config") => Some(route_spec(
            "speech_config_view",
            "speech",
            User,
            "anonymous",
        )),
        ("GET", "/api/speech/volcengine/asr/stream") => {
            Some(route_spec("asr_stream_start", "speech", User, "anonymous"))
        }
        ("GET", "/api/speech/volcengine/tts/bidirection") => Some(route_spec(
            "tts_bidirection_start",
            "speech",
            User,
            "anonymous",
        )),
        ("POST", "/api/speech/volcengine/tts/sse") => {
            Some(route_spec("tts_sse_start", "speech", User, "anonymous"))
        }
        ("GET", "/api/runtime/settings") => Some(route_spec(
            "runtime_settings_view",
            "runtime",
            User,
            "anonymous",
        )),
        ("PUT", "/api/runtime/settings") => Some(route_spec(
            "runtime_settings_update",
            "runtime",
            User,
            "anonymous",
        )),
        ("GET", "/api/runtime/save/snapshot") => Some(route_spec(
            "runtime_snapshot_view",
            "runtime",
            User,
            "anonymous",
        )),
        ("PUT", "/api/runtime/save/snapshot") => Some(route_spec(
            "runtime_snapshot_save",
            "runtime",
            User,
            "anonymous",
        )),
        ("DELETE", "/api/runtime/save/snapshot") => Some(route_spec(
            "runtime_snapshot_delete",
            "runtime",
            User,
            "anonymous",
        )),
        _ if route.starts_with("/api/runtime/puzzle/") => Some(route_spec(
            "puzzle_route_success",
            "puzzle",
            user_scope_for(method),
            "anonymous",
        )),
        _ if route.starts_with("/api/creation/match3d/")
            || route.starts_with("/api/runtime/match3d/") =>
        {
            Some(route_spec(
                "match3d_route_success",
                "match3d",
                user_scope_for(method),
                "anonymous",
            ))
        }
        _ if route.starts_with("/api/creation/square-hole/")
            || route.starts_with("/api/runtime/square-hole/") =>
        {
            Some(route_spec(
                "square_hole_route_success",
                "square-hole",
                user_scope_for(method),
                "anonymous",
            ))
        }
        _ if route.starts_with("/api/runtime/custom-world") => Some(route_spec(
            "custom_world_route_success",
            "custom-world",
            user_scope_for(method),
            "anonymous",
        )),
        _ if route.starts_with("/api/runtime/creative-agent") => Some(route_spec(
            "creative_agent_route_success",
            "creative-agent",
            user_scope_for(method),
            "anonymous",
        )),
        _ => None,
    }
}

fn route_spec(
    event_key: &'static str,
    module_key: &'static str,
    scope_kind: RuntimeTrackingScopeKind,
    scope_id: &'static str,
) -> RouteTrackingSpec {
    RouteTrackingSpec {
        event_key,
        module_key,
        scope_kind,
        scope_id,
    }
}

fn user_scope_for(method: &Method) -> RuntimeTrackingScopeKind {
    if matches!(*method, Method::GET) {
        RuntimeTrackingScopeKind::Site
    } else {
        RuntimeTrackingScopeKind::User
    }
}

fn build_route_tracking_metadata(
    spec: &RouteTrackingSpec,
    request_context: &RequestContext,
    method: &Method,
    path: &str,
    status: StatusCode,
) -> Value {
    let mut metadata = json!({
        "route": path,
        "method": method.as_str(),
        "status": status.as_u16(),
        "operation": request_context.operation(),
    });

    if spec.module_key == "asset" {
        metadata["asset"] = build_asset_route_metadata(spec.event_key, path);
        metadata["assetOperation"] = json!(spec.event_key);
    }

    metadata
}

fn build_asset_route_metadata(event_key: &str, path: &str) -> Value {
    json!({
        "operation": event_key,
        "operationFamily": resolve_asset_operation_family(event_key),
        "route": path,
    })
}

fn resolve_asset_operation_family(event_key: &str) -> &'static str {
    match event_key {
        "asset_upload_ticket_create" => "upload_ticket",
        "asset_sts_credentials_create" => "sts_credentials",
        "asset_upload_confirm" => "object_confirm",
        "asset_bind" => "object_bind",
        "asset_character_visual_generate" => "character_visual_generate",
        "asset_character_visual_publish" => "character_visual_publish",
        "asset_character_animation_generate" => "character_animation_generate",
        "asset_character_animation_publish" => "character_animation_publish",
        "asset_character_animation_import" => "character_animation_import",
        "asset_character_workflow_cache_save" => "character_workflow_cache_save",
        "asset_history_view" => "history_view",
        _ => "asset_operation",
    }
}

fn normalize_route_path(path: &str) -> String {
    let mut normalized = String::new();
    for segment in path.trim_end_matches('/').split('/') {
        if segment.is_empty() {
            continue;
        }
        normalized.push('/');
        normalized.push_str(if is_dynamic_path_segment(segment) {
            "{id}"
        } else {
            segment
        });
    }
    if normalized.is_empty() {
        "/".to_string()
    } else {
        normalized
    }
}

fn is_dynamic_path_segment(segment: &str) -> bool {
    let lower = segment.to_ascii_lowercase();
    segment.len() >= 8
        || segment.chars().any(|ch| ch.is_ascii_digit())
        || lower.starts_with("world")
        || lower.starts_with("task")
        || lower.starts_with("profile")
        || lower.starts_with("session")
}

pub async fn record_daily_login_tracking_event_after_success(
    state: &AppState,
    request_context: &RequestContext,
    user_id: &str,
    login_method: AuthLoginMethod,
) {
    let mut draft = TrackingEventDraft::user("daily_login", "profile", user_id);
    draft.metadata = json!({
        "operation": request_context.operation(),
        "loginMethod": login_method.as_str(),
    });

    record_tracking_event_after_success(state, request_context, draft).await;
}

pub async fn record_tracking_event_after_success(
    state: &AppState,
    request_context: &RequestContext,
    draft: TrackingEventDraft,
) {
    let occurred_at_micros = OffsetDateTime::now_utc().unix_timestamp_nanos() / 1_000;
    let event_id = build_tracking_event_id(&draft, occurred_at_micros);
    let event_key = draft.event_key.to_string();
    let scope_kind = draft.scope_kind;
    let scope_id = draft.scope_id;
    let metadata_json = draft.metadata.to_string();

    match state
        .spacetime_client()
        .record_tracking_event(
            event_id,
            event_key.clone(),
            scope_kind,
            scope_id.clone(),
            draft.user_id,
            draft.owner_user_id,
            draft.profile_id,
            draft.module_key.map(str::to_string),
            metadata_json,
            occurred_at_micros as i64,
        )
        .await
    {
        Ok(()) => tracing::info!(
            request_id = request_context.request_id(),
            operation = request_context.operation(),
            event_key = %event_key,
            scope_kind = %scope_kind.as_str(),
            scope_id = %scope_id,
            "后端埋点已记录"
        ),
        Err(error) => tracing::warn!(
            request_id = request_context.request_id(),
            operation = request_context.operation(),
            event_key = %event_key,
            scope_kind = %scope_kind.as_str(),
            scope_id = %scope_id,
            error = %error,
            "后端埋点记录失败，主业务流程继续"
        ),
    }
}

fn build_tracking_event_id(draft: &TrackingEventDraft, occurred_at_micros: i128) -> String {
    if draft.event_key == "daily_login"
        && draft.scope_kind == RuntimeTrackingScopeKind::User
        && !draft.scope_id.trim().is_empty()
    {
        let day_key = runtime_profile_beijing_day_key(occurred_at_micros as i64);
        return format!("daily-login:{}:{}", draft.scope_id.trim(), day_key);
    }

    format!(
        "api:{}:{}:{}",
        draft.event_key,
        occurred_at_micros,
        Uuid::new_v4()
    )
}

fn runtime_profile_beijing_day_key(occurred_at_micros: i64) -> i64 {
    const PROFILE_TASK_BEIJING_OFFSET_MICROS: i64 = 28_800_000_000;
    const PROFILE_RUNTIME_DAY_MICROS: i64 = 86_400_000_000;
    (occurred_at_micros + PROFILE_TASK_BEIJING_OFFSET_MICROS).div_euclid(PROFILE_RUNTIME_DAY_MICROS)
}