use super::*;
use std::path::{Path, PathBuf};
use std::process::Stdio;

use sha2::{Digest, Sha256};
use tokio::io::{AsyncRead, AsyncReadExt, AsyncWriteExt};

const GAME_CREATOR_CODEX_CLI_EXECUTABLE: &str = "codex";
const GAME_CREATOR_BUNDLED_CODEX_CLI_RELATIVE_PATH: &str = "codex/win-x64/bin/codex.exe";
const GAME_CREATOR_BUNDLED_CODEX_CLI_MANIFEST_RELATIVE_PATH: &str = "codex/win-x64/manifest.json";
const GAME_CREATOR_BUNDLED_CODEX_CLI_REQUIRED_FILES: [&str; 6] = [
    "bin/codex.exe",
    "bin/codex-code-mode-host.exe",
    "codex-path/rg.exe",
    "codex-resources/codex-command-runner.exe",
    "codex-resources/codex-windows-sandbox-setup.exe",
    "codex-package.json",
];
const GAME_CREATOR_CODEX_CLI_PROMPT_MAX_BYTES: usize = 4 * 1024 * 1024;
const GAME_CREATOR_CODEX_CLI_STDOUT_MAX_BYTES: usize = 4 * 1024 * 1024;
const GAME_CREATOR_CODEX_CLI_STDERR_MAX_BYTES: usize = 256 * 1024;

#[derive(serde::Deserialize)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
struct GameCreatorBundledCodexCliManifest {
    schema_version: String,
    platform: String,
    version: String,
    files: std::collections::BTreeMap<String, String>,
}

fn game_creator_codex_cli_executable_candidates_for(
    resource_dir: Option<&Path>,
    app_data: Option<&Path>,
    local_app_data: Option<&Path>,
    runtime_config_dir: Option<&Path>,
    path: Option<&std::ffi::OsStr>,
) -> Vec<PathBuf> {
    let mut candidates = Vec::new();
    #[cfg(windows)]
    {
        if let Some(resource_dir) = resource_dir {
            candidates.push(resource_dir.join(GAME_CREATOR_BUNDLED_CODEX_CLI_RELATIVE_PATH));
        }
        fn append_native_npm_candidates(candidates: &mut Vec<PathBuf>, npm_root: &Path) {
            let vendor_root = npm_root
                .join("node_modules")
                .join("@openai")
                .join("codex")
                .join("node_modules")
                .join("@openai")
                .join("codex-win32-x64")
                .join("vendor");
            if let Ok(entries) = std::fs::read_dir(vendor_root) {
                let mut targets = entries
                    .filter_map(Result::ok)
                    .map(|entry| entry.path().join("bin").join("codex.exe"))
                    .collect::<Vec<_>>();
                targets.sort();
                candidates.extend(targets);
            }
        }

        fn append_desktop_codex_candidates(candidates: &mut Vec<PathBuf>, local_app_data: &Path) {
            let bin_root = local_app_data.join("OpenAI").join("Codex").join("bin");
            if let Ok(entries) = std::fs::read_dir(bin_root) {
                let mut targets = entries
                    .filter_map(Result::ok)
                    .map(|entry| entry.path().join("codex.exe"))
                    .collect::<Vec<_>>();
                targets.sort();
                targets.reverse();
                candidates.extend(targets);
            }
        }

        if let Some(app_data) = app_data {
            append_native_npm_candidates(&mut candidates, &app_data.join("npm"));
        }
        if let Some(local_app_data) = local_app_data {
            append_desktop_codex_candidates(&mut candidates, local_app_data);
        }
        if let Some(app_data) = runtime_config_dir.and_then(Path::parent) {
            append_native_npm_candidates(&mut candidates, &app_data.join("npm"));
            if let Some(user_profile) = app_data.parent() {
                append_desktop_codex_candidates(&mut candidates, &user_profile.join("Local"));
            }
        }
        if let Some(path) = path {
            for entry in std::env::split_paths(&path) {
                append_native_npm_candidates(&mut candidates, &entry);
                candidates.push(entry.join("codex.exe"));
            }
        }
    }
    candidates.push(PathBuf::from(GAME_CREATOR_CODEX_CLI_EXECUTABLE));
    candidates
}

fn game_creator_codex_cli_executable_candidates() -> Vec<PathBuf> {
    game_creator_codex_cli_executable_candidates_for(
        game_creator_bundled_resource_dir().as_deref(),
        std::env::var_os("APPDATA").as_deref().map(Path::new),
        std::env::var_os("LOCALAPPDATA").as_deref().map(Path::new),
        game_creator_runtime_config_dir().as_deref(),
        std::env::var_os("PATH").as_deref(),
    )
}

fn game_creator_bundled_resource_dir() -> Option<PathBuf> {
    #[cfg(windows)]
    {
        std::env::current_exe()
            .ok()
            .and_then(|path| path.parent().map(Path::to_path_buf))
    }
    #[cfg(not(windows))]
    {
        None
    }
}

fn game_creator_bundled_codex_cli_path(resource_dir: Option<&Path>) -> Option<PathBuf> {
    resource_dir.map(|resource_dir| resource_dir.join(GAME_CREATOR_BUNDLED_CODEX_CLI_RELATIVE_PATH))
}

fn validate_game_creator_bundled_codex_cli(executable: &Path) -> Result<String, String> {
    let bundle_root = executable
        .parent()
        .and_then(Path::parent)
        .ok_or_else(|| "内置 Codex CLI 路径无效".to_string())?;
    let manifest_path = bundle_root.join(
        Path::new(GAME_CREATOR_BUNDLED_CODEX_CLI_MANIFEST_RELATIVE_PATH)
            .file_name()
            .expect("bundled Codex manifest file name"),
    );
    let manifest = std::fs::read_to_string(&manifest_path)
        .map_err(|_| "内置 Codex CLI 缺少完整性清单".to_string())
        .and_then(|value| {
            serde_json::from_str::<GameCreatorBundledCodexCliManifest>(&value)
                .map_err(|_| "内置 Codex CLI 完整性清单无效".to_string())
        })?;
    if manifest.schema_version != "genarrative-codex-sidecar.v2"
        || manifest.platform != "win32-x64"
        || manifest.version.trim().is_empty()
        || GAME_CREATOR_BUNDLED_CODEX_CLI_REQUIRED_FILES
            .iter()
            .any(|relative| {
                manifest.files.get(*relative).map_or(true, |hash| {
                    hash.len() != 64 || !hash.bytes().all(|byte| byte.is_ascii_hexdigit())
                })
            })
    {
        return Err("内置 Codex CLI 完整性清单不受支持".to_string());
    }
    for relative in GAME_CREATOR_BUNDLED_CODEX_CLI_REQUIRED_FILES {
        let path = bundle_root.join(relative);
        let bytes = std::fs::read(&path).map_err(|_| {
            format!(
                "内置 Codex CLI 缺少必需组件：{}",
                path.file_name().unwrap_or_default().to_string_lossy()
            )
        })?;
        let actual = format!("{:x}", Sha256::digest(bytes));
        if !actual.eq_ignore_ascii_case(manifest.files.get(relative).expect("validated hash")) {
            return Err(format!("内置 Codex CLI 完整性校验失败：组件 {relative}"));
        }
    }
    Ok(manifest.version)
}

fn game_creator_codex_cli_version_at(executable: &Path) -> Result<String, String> {
    let mut command = crate::new_windows_background_std_command(executable);
    let output = command
        .arg("--version")
        .stdin(Stdio::null())
        .stderr(Stdio::null())
        .output()
        .map_err(|error| error.to_string())?;
    if !output.status.success() {
        return Err(format!("版本检查退出状态为 {}", output.status));
    }
    let version = std::str::from_utf8(&output.stdout)
        .map_err(|_| "版本信息不是 UTF-8".to_string())?
        .trim();
    if !version.starts_with("codex-cli ") || version.len() > 120 {
        return Err("返回了无法识别的版本信息".to_string());
    }
    Ok(version.to_string())
}

pub(crate) fn game_creator_codex_cli_executable_path() -> Result<PathBuf, String> {
    let mut last_error = None;
    let mut seen = std::collections::HashSet::new();
    let bundled =
        game_creator_bundled_codex_cli_path(game_creator_bundled_resource_dir().as_deref());
    for candidate in game_creator_codex_cli_executable_candidates() {
        let identity = candidate.to_string_lossy().to_ascii_lowercase();
        if !seen.insert(identity) {
            continue;
        }
        let bundled_version = (bundled.as_ref() == Some(&candidate))
            .then(|| validate_game_creator_bundled_codex_cli(&candidate))
            .transpose();
        match bundled_version.and_then(|expected_version| {
            game_creator_codex_cli_version_at(&candidate).and_then(|actual_version| {
                if expected_version
                    .as_deref()
                    .is_some_and(|expected| expected != actual_version)
                {
                    Err("内置 Codex CLI 版本与完整性清单不一致".to_string())
                } else {
                    Ok(actual_version)
                }
            })
        }) {
            Ok(_) => return Ok(candidate),
            Err(error) => last_error = Some(error),
        }
    }
    Err(format!(
        "Codex CLI 未安装或当前 Agent Runner 无法启动；已检查内置 sidecar、PATH 和 npm 全局安装目录{}",
        last_error
            .map(|error| format!("（最后错误：{error}）"))
            .unwrap_or_default()
    ))
}

struct CodexCliStderrSummary {
    byte_len: usize,
    sha256: String,
    classification: &'static str,
}

pub(crate) fn game_creator_codex_cli_version_identity() -> Result<String, String> {
    let executable = game_creator_codex_cli_executable_path()?;
    game_creator_codex_cli_version_at(&executable)
}

pub(in crate::agent) fn game_creator_codex_cli_reasoning_effort(
    request: &LlmRunRequest,
) -> Option<&'static str> {
    request
        .response_reasoning_effort
        .map(|effort| match effort {
            platform_llm::LlmResponseReasoningEffort::Low => "low",
            platform_llm::LlmResponseReasoningEffort::Medium => "medium",
            platform_llm::LlmResponseReasoningEffort::High => "high",
            platform_llm::LlmResponseReasoningEffort::Max => "max",
        })
}

pub(in crate::agent) fn game_creator_codex_cli_tool_output_schema(
    request: &LlmRunRequest,
) -> Option<serde_json::Value> {
    if request.function_tools.is_empty() {
        return None;
    }
    let names = request
        .function_tools
        .iter()
        .map(|tool| serde_json::Value::String(tool.name.clone()))
        .collect::<Vec<_>>();
    Some(serde_json::json!({
        "type": "object",
        "required": ["toolCalls"],
        "additionalProperties": false,
        "properties": {
            "toolCalls": {
                "type": "array",
                "minItems": 1,
                "maxItems": AGENT_RUNTIME_BACKGROUND_TOOL_ACTION_LIMIT,
                "items": {
                    "type": "object",
                    "required": ["name", "arguments"],
                    "additionalProperties": false,
                    "properties": {
                        "name": { "type": "string", "enum": names },
                        "arguments": {
                            "type": "string",
                            "description": "严格 JSON 对象字符串，必须符合对应函数 parameters schema"
                        }
                    }
                }
            }
        }
    }))
}

pub(in crate::agent) fn render_game_creator_codex_cli_prompt(
    request: &LlmRunRequest,
) -> Result<String, String> {
    let messages = serde_json::to_string_pretty(&request.messages)
        .map_err(|error| format!("序列化 Codex CLI Agent 消息失败：{error}"))?;
    let functions = serde_json::to_string_pretty(&request.function_tools)
        .map_err(|error| format!("序列化 Codex CLI Agent 函数目录失败：{error}"))?;
    let output_contract = if request.function_tools.is_empty() {
        "本次没有 Runtime 函数目录。请直接返回请求要求的最终正文；不要使用 Markdown 代码围栏。"
            .to_string()
    } else {
        "本次必须只返回 output schema 要求的 toolCalls 对象。每个 name 必须来自函数目录；arguments 必须是一个严格 JSON 对象的字符串形式，并符合该函数 parameters。不要返回普通正文、Markdown、解释或额外字段。"
            .to_string()
    };
    let prompt = format!(
        "你是 Genarrative AI 游戏创作 Runtime 当前节点的推理 Agent。\n\n安全边界：不要调用 Codex 内置 shell、文件、网络、插件、Skill 或子 Agent；不要读取当前临时目录。项目事实只来自下面的消息，项目行动只能通过返回 Runtime 函数请求完成。不得声称已经执行尚未由 Runtime observation 证明的动作。\n\n{output_contract}\n\n以下消息按 role 保持原顺序，是本次节点的完整请求：\n{messages}\n\n以下是当前 Runtime 实际广告的函数目录：\n{functions}"
    );
    if prompt.len() > GAME_CREATOR_CODEX_CLI_PROMPT_MAX_BYTES {
        return Err(format!(
            "Codex CLI Agent prompt 超过 {} 字节上限",
            GAME_CREATOR_CODEX_CLI_PROMPT_MAX_BYTES
        ));
    }
    Ok(prompt)
}

pub(in crate::agent) fn game_creator_codex_cli_minimal_environment(
    command: &mut tokio::process::Command,
) {
    command.env_clear();
    for name in [
        "PATH",
        "HOME",
        "USERPROFILE",
        "APPDATA",
        "LOCALAPPDATA",
        "CODEX_HOME",
        "TMPDIR",
        "TEMP",
        "TMP",
        "HTTP_PROXY",
        "HTTPS_PROXY",
        "ALL_PROXY",
        "NO_PROXY",
        "SSL_CERT_FILE",
        "SSL_CERT_DIR",
        "SystemRoot",
        "WINDIR",
        "ComSpec",
        "PATHEXT",
    ] {
        if let Some(value) = std::env::var_os(name) {
            command.env(name, value);
        }
    }
    command.env("NO_COLOR", "1").env("TERM", "dumb");
}

pub(in crate::agent) fn configure_game_creator_codex_cli_process(
    command: &mut tokio::process::Command,
) {
    #[cfg(unix)]
    {
        use std::os::unix::process::CommandExt;
        command.as_std_mut().process_group(0);
        #[cfg(target_os = "linux")]
        unsafe {
            command.as_std_mut().pre_exec(|| {
                if libc::prctl(libc::PR_SET_PDEATHSIG, libc::SIGKILL) != 0 {
                    return Err(std::io::Error::last_os_error());
                }
                if libc::getppid() == 1 {
                    return Err(std::io::Error::new(
                        std::io::ErrorKind::Interrupted,
                        "Codex CLI parent exited before child exec",
                    ));
                }
                Ok(())
            });
        }
    }
    #[cfg(windows)]
    crate::configure_windows_background_tokio_command(command, true);
}

pub(in crate::agent) async fn terminate_game_creator_codex_cli_process_tree(
    child: &mut tokio::process::Child,
) {
    if let Some(process_id) = child.id() {
        #[cfg(unix)]
        unsafe {
            libc::kill(-(process_id as i32), libc::SIGKILL);
        }
        #[cfg(windows)]
        {
            let mut command = tokio::process::Command::new("taskkill");
            command
                .args(["/PID", &process_id.to_string(), "/T", "/F"])
                .stdin(Stdio::null())
                .stdout(Stdio::null())
                .stderr(Stdio::null());
            crate::configure_windows_background_tokio_command(&mut command, false);
            let _ = command.status().await;
        }
    }
    let _ = child.kill().await;
    let _ = child.wait().await;
}

async fn read_game_creator_codex_cli_output<R>(
    mut reader: R,
    max_bytes: usize,
) -> Result<Vec<u8>, String>
where
    R: AsyncRead + Unpin,
{
    let mut bytes = Vec::new();
    let mut buffer = [0_u8; 8 * 1024];
    let mut exceeded = false;
    loop {
        let count = reader
            .read(&mut buffer)
            .await
            .map_err(|error| format!("读取 Codex CLI Agent 输出失败：{error}"))?;
        if count == 0 {
            break;
        }
        let remaining = max_bytes.saturating_sub(bytes.len());
        bytes.extend_from_slice(&buffer[..count.min(remaining)]);
        exceeded |= count > remaining;
    }
    if exceeded {
        return Err(format!("Codex CLI Agent 输出超过 {max_bytes} 字节上限"));
    }
    Ok(bytes)
}

async fn summarize_game_creator_codex_cli_stderr<R>(
    mut reader: R,
    max_bytes: usize,
) -> Result<CodexCliStderrSummary, String>
where
    R: AsyncRead + Unpin,
{
    let mut byte_len = 0_usize;
    let mut sha256 = Sha256::new();
    let mut buffer = [0_u8; 8 * 1024];
    loop {
        let count = reader
            .read(&mut buffer)
            .await
            .map_err(|_| "读取 Codex CLI Agent stderr 失败".to_string())?;
        if count == 0 {
            break;
        }
        byte_len = byte_len.saturating_add(count);
        sha256.update(&buffer[..count]);
    }
    Ok(CodexCliStderrSummary {
        byte_len,
        sha256: format!("{:x}", sha256.finalize()),
        classification: if byte_len == 0 {
            "empty"
        } else if byte_len > max_bytes {
            "oversized"
        } else {
            "nonempty"
        },
    })
}

fn parse_game_creator_codex_cli_response(
    stdout: &[u8],
    request: &LlmRunRequest,
) -> Result<platform_llm::LlmRunResponse, platform_llm::LlmError> {
    let stdout = std::str::from_utf8(stdout).map_err(|_| {
        platform_llm::LlmError::Deserialize("Codex CLI Agent JSONL 不是 UTF-8".to_string())
    })?;
    let mut response_id = None;
    let mut final_message = None;
    let mut usage = None;
    let mut completed = false;
    for (index, line) in stdout.lines().enumerate() {
        if line.trim().is_empty() {
            continue;
        }
        let event = serde_json::from_str::<serde_json::Value>(line).map_err(|_| {
            platform_llm::LlmError::Deserialize(format!(
                "Codex CLI Agent JSONL 第 {} 行无效",
                index.saturating_add(1)
            ))
        })?;
        match event.get("type").and_then(serde_json::Value::as_str) {
            Some("thread.started") => {
                response_id = event
                    .get("thread_id")
                    .and_then(serde_json::Value::as_str)
                    .map(str::to_string);
            }
            Some("item.completed")
                if event
                    .pointer("/item/type")
                    .and_then(serde_json::Value::as_str)
                    == Some("agent_message") =>
            {
                final_message = event
                    .pointer("/item/text")
                    .and_then(serde_json::Value::as_str)
                    .map(str::to_string);
            }
            Some("turn.completed") => {
                completed = true;
                let prompt_tokens = event
                    .pointer("/usage/input_tokens")
                    .and_then(serde_json::Value::as_u64)
                    .unwrap_or(0);
                let completion_tokens = event
                    .pointer("/usage/output_tokens")
                    .and_then(serde_json::Value::as_u64)
                    .unwrap_or(0);
                let total_tokens = prompt_tokens.saturating_add(completion_tokens);
                if total_tokens > 0 {
                    usage = Some(platform_llm::LlmTokenUsage {
                        prompt_tokens,
                        completion_tokens,
                        total_tokens,
                    });
                }
            }
            Some("turn.failed") => {
                return Err(platform_llm::LlmError::Transport(
                    "Codex CLI Agent 返回失败终态".to_string(),
                ));
            }
            _ => {}
        }
    }
    if !completed {
        return Err(platform_llm::LlmError::Deserialize(
            "Codex CLI Agent 缺少 turn.completed 终态".to_string(),
        ));
    }
    let text = final_message
        .filter(|text| !text.trim().is_empty())
        .ok_or(platform_llm::LlmError::EmptyResponse)?;
    let tool_calls = if request.function_tools.is_empty() {
        Vec::new()
    } else {
        let envelope = serde_json::from_str::<serde_json::Value>(&text).map_err(|_| {
            platform_llm::LlmError::Deserialize(
                "Codex CLI Agent structured output 不是严格 JSON".to_string(),
            )
        })?;
        let calls = envelope
            .get("toolCalls")
            .and_then(serde_json::Value::as_array)
            .ok_or_else(|| {
                platform_llm::LlmError::Deserialize(
                    "Codex CLI Agent structured output 缺少 toolCalls".to_string(),
                )
            })?;
        calls
            .iter()
            .enumerate()
            .map(|(index, call)| {
                let name = call
                    .get("name")
                    .and_then(serde_json::Value::as_str)
                    .ok_or_else(|| {
                        platform_llm::LlmError::Deserialize(
                            "Codex CLI Agent tool call 缺少 name".to_string(),
                        )
                    })?;
                let arguments = call
                    .get("arguments")
                    .and_then(serde_json::Value::as_str)
                    .ok_or_else(|| {
                        platform_llm::LlmError::Deserialize(
                            "Codex CLI Agent tool call 缺少 arguments".to_string(),
                        )
                    })?;
                if !request.function_tools.iter().any(|tool| tool.name == name) {
                    return Err(platform_llm::LlmError::Deserialize(
                        "Codex CLI Agent 返回未广告函数".to_string(),
                    ));
                }
                Ok(platform_llm::LlmToolCall {
                    id: format!("codex-cli-call-{}", index.saturating_add(1)),
                    name: name.to_string(),
                    arguments: arguments.to_string(),
                })
            })
            .collect::<Result<Vec<_>, _>>()?
    };
    Ok(platform_llm::LlmRunResponse {
        provider: platform_llm::LlmProvider::OpenAiCompatible,
        model: "codex-cli".to_string(),
        text: if tool_calls.is_empty() {
            text
        } else {
            String::new()
        },
        finish_reason: Some("stop".to_string()),
        response_id,
        usage,
        tool_calls,
        responses_output: Vec::new(),
    })
}

async fn request_game_creator_agent_codex_cli_with_executable(
    executable: &std::ffi::OsStr,
    request: LlmRunRequest,
) -> Result<platform_llm::LlmRunResponse, platform_llm::LlmError> {
    let prompt = render_game_creator_codex_cli_prompt(&request)
        .map_err(platform_llm::LlmError::InvalidRequest)?;
    let temp_dir = tempfile::Builder::new()
        .prefix("genarrative-agc-codex-cli-")
        .tempdir()
        .map_err(|error| {
            platform_llm::LlmError::Transport(format!("创建 Codex CLI Agent 临时目录失败：{error}"))
        })?;
    let schema_path = if let Some(schema) = game_creator_codex_cli_tool_output_schema(&request) {
        let path = temp_dir.path().join("tool-output.schema.json");
        let content = serde_json::to_vec(&schema).map_err(|error| {
            platform_llm::LlmError::InvalidRequest(format!(
                "序列化 Codex CLI Agent output schema 失败：{error}"
            ))
        })?;
        std::fs::write(&path, content).map_err(|error| {
            platform_llm::LlmError::Transport(format!(
                "写入 Codex CLI Agent output schema 失败：{error}"
            ))
        })?;
        Some(path)
    } else {
        None
    };

    let mut command = tokio::process::Command::new(executable);
    command
        .arg("exec")
        .arg("--json")
        .arg("--ephemeral")
        .arg("--ignore-user-config")
        .arg("--ignore-rules")
        .arg("--skip-git-repo-check")
        .arg("--sandbox")
        .arg("read-only")
        .arg("--disable")
        .arg("shell_tool")
        .arg("--config")
        .arg("approval_policy=\"never\"")
        .arg("--cd")
        .arg(temp_dir.path());
    if let Some(effort) = game_creator_codex_cli_reasoning_effort(&request) {
        command
            .arg("--config")
            .arg(format!("model_reasoning_effort=\"{effort}\""));
    }
    if let Some(path) = schema_path.as_ref() {
        command.arg("--output-schema").arg(path);
    }
    command
        .arg("-")
        .stdin(Stdio::piped())
        .stdout(Stdio::piped())
        .stderr(Stdio::piped())
        .kill_on_drop(true);
    game_creator_codex_cli_minimal_environment(&mut command);
    configure_game_creator_codex_cli_process(&mut command);

    let mut child = command.spawn().map_err(|error| {
        platform_llm::LlmError::InvalidConfig(format!(
            "Codex CLI Agent 不可用，请安装并登录 Codex CLI：{error}"
        ))
    })?;
    let mut stdin = child.stdin.take().ok_or_else(|| {
        platform_llm::LlmError::Transport("Codex CLI Agent stdin 未建立".to_string())
    })?;
    // 短生命周期 CLI 可能在 prompt 写完前退出；继续采集退出状态和脱敏
    // stderr，确保调用方拿到可行动的进程错误，而不是平台相关的 BrokenPipe。
    let mut stdin_error = None;
    if let Err(error) = stdin.write_all(prompt.as_bytes()).await {
        if error.kind() == std::io::ErrorKind::BrokenPipe {
            stdin_error = Some(format!("写入 Codex CLI Agent prompt 失败：{error}"));
        } else {
            return Err(platform_llm::LlmError::Transport(format!(
                "写入 Codex CLI Agent prompt 失败：{error}"
            )));
        }
    }
    if let Err(error) = stdin.shutdown().await {
        if error.kind() == std::io::ErrorKind::BrokenPipe {
            stdin_error.get_or_insert_with(|| format!("关闭 Codex CLI Agent stdin 失败：{error}"));
        } else {
            return Err(platform_llm::LlmError::Transport(format!(
                "关闭 Codex CLI Agent stdin 失败：{error}"
            )));
        }
    }
    drop(stdin);

    let stdout = child.stdout.take().ok_or_else(|| {
        platform_llm::LlmError::Transport("Codex CLI Agent stdout 未建立".to_string())
    })?;
    let stderr = child.stderr.take().ok_or_else(|| {
        platform_llm::LlmError::Transport("Codex CLI Agent stderr 未建立".to_string())
    })?;
    let stdout_task = tokio::spawn(read_game_creator_codex_cli_output(
        stdout,
        GAME_CREATOR_CODEX_CLI_STDOUT_MAX_BYTES,
    ));
    let stderr_task = tokio::spawn(summarize_game_creator_codex_cli_stderr(
        stderr,
        GAME_CREATOR_CODEX_CLI_STDERR_MAX_BYTES,
    ));
    let timeout_ms = request
        .request_timeout_ms
        .unwrap_or(GAME_CREATOR_LLM_REQUEST_TIMEOUT_MS)
        .max(1);
    let wait =
        tokio::time::timeout(std::time::Duration::from_millis(timeout_ms), child.wait()).await;
    let (status, timed_out) = match wait {
        Ok(Ok(status)) => (Some(status), false),
        Ok(Err(error)) => {
            terminate_game_creator_codex_cli_process_tree(&mut child).await;
            return Err(platform_llm::LlmError::Transport(format!(
                "等待 Codex CLI Agent 退出失败：{error}"
            )));
        }
        Err(_) => {
            terminate_game_creator_codex_cli_process_tree(&mut child).await;
            (None, true)
        }
    };
    let stdout = stdout_task
        .await
        .map_err(|_| {
            platform_llm::LlmError::Transport("Codex CLI Agent stdout 读取任务失败".to_string())
        })?
        .map_err(platform_llm::LlmError::Transport)?;
    let stderr = stderr_task
        .await
        .map_err(|_| {
            platform_llm::LlmError::Transport("Codex CLI Agent stderr 读取任务失败".to_string())
        })?
        .map_err(platform_llm::LlmError::Transport)?;
    if timed_out {
        return Err(platform_llm::LlmError::Timeout { attempts: 1 });
    }
    let status = status.expect("non-timeout Codex CLI wait has exit status");
    if stderr.classification == "oversized" {
        return Err(platform_llm::LlmError::Transport(format!(
            "Codex CLI Agent stderr 超过 {} 字节上限；stderrClass={}；stderrBytes={}；stderrSha256={}",
            GAME_CREATOR_CODEX_CLI_STDERR_MAX_BYTES,
            stderr.classification,
            stderr.byte_len,
            stderr.sha256
        )));
    }
    if !status.success() {
        return Err(platform_llm::LlmError::Transport(format!(
            "Codex CLI Agent 退出失败（code={}）；stderrClass={}；stderrBytes={}；stderrSha256={}；请检查 Codex CLI 登录状态、网络和本机配置",
            status
                .code()
                .map(|code| code.to_string())
                .unwrap_or_else(|| "none".to_string()),
            stderr.classification,
            stderr.byte_len,
            stderr.sha256
        )));
    }
    if let Some(error) = stdin_error {
        return Err(platform_llm::LlmError::Transport(error));
    }
    parse_game_creator_codex_cli_response(&stdout, &request)
}

pub(in crate::agent) async fn request_game_creator_agent_codex_cli(
    request: LlmRunRequest,
) -> Result<platform_llm::LlmRunResponse, platform_llm::LlmError> {
    let executable =
        game_creator_codex_cli_executable_path().map_err(platform_llm::LlmError::InvalidConfig)?;
    request_game_creator_agent_codex_cli_with_executable(executable.as_os_str(), request).await
}

#[cfg(test)]
mod tests {
    use super::*;

    fn tool_request() -> LlmRunRequest {
        LlmRunRequest::single_turn("系统", "任务").with_function_tools(vec![
            platform_llm::LlmFunctionTool::new(
                "runtime_tool_file_read",
                "读取文件",
                serde_json::json!({"type":"object"}),
            ),
        ])
    }

    #[test]
    fn codex_cli_reasoning_effort_preserves_max_wire_value() {
        let request = LlmRunRequest::single_turn("系统", "任务")
            .with_response_reasoning_effort(platform_llm::LlmResponseReasoningEffort::Max);
        assert_eq!(
            game_creator_codex_cli_reasoning_effort(&request),
            Some("max")
        );
    }

    #[cfg(windows)]
    #[test]
    fn codex_cli_candidates_prefer_sorted_native_npm_targets_before_path() {
        let temp = tempfile::tempdir().expect("temp dir");
        let app_data = temp.path().join("app-data");
        let vendor = app_data
            .join("npm/node_modules/@openai/codex/node_modules/@openai/codex-win32-x64/vendor");
        std::fs::create_dir_all(vendor.join("z-target/bin")).expect("z target");
        std::fs::create_dir_all(vendor.join("a-target/bin")).expect("a target");
        let path_dir = temp.path().join("path");
        std::fs::create_dir_all(&path_dir).expect("path dir");

        let candidates = game_creator_codex_cli_executable_candidates_for(
            None,
            Some(&app_data),
            None,
            None,
            Some(path_dir.as_os_str()),
        );
        assert_eq!(
            candidates[0],
            vendor.join("a-target/bin/codex.exe"),
            "native npm targets must be deterministic and precede PATH"
        );
        assert_eq!(candidates[1], vendor.join("z-target/bin/codex.exe"));
        assert_eq!(candidates[2], path_dir.join("codex.exe"));
        assert_eq!(candidates.last(), Some(&PathBuf::from("codex")));
    }

    #[cfg(windows)]
    #[test]
    fn codex_cli_candidates_discover_native_npm_target_from_path_without_appdata() {
        let temp = tempfile::tempdir().expect("temp dir");
        let npm_root = temp.path().join("npm");
        let native = npm_root
            .join("node_modules/@openai/codex/node_modules/@openai/codex-win32-x64/vendor")
            .join("x86_64-pc-windows-msvc/bin/codex.exe");
        std::fs::create_dir_all(native.parent().expect("native parent"))
            .expect("native target directory");

        let candidates = game_creator_codex_cli_executable_candidates_for(
            None,
            None,
            None,
            None,
            Some(npm_root.as_os_str()),
        );
        assert_eq!(candidates[0], native);
        assert_eq!(candidates[1], npm_root.join("codex.exe"));
    }

    #[cfg(windows)]
    #[test]
    fn codex_cli_candidates_discover_native_npm_target_from_runtime_config_dir() {
        let temp = tempfile::tempdir().expect("temp dir");
        let app_data = temp.path().join("roaming");
        let config_dir = app_data.join("world.genarrative.ai-game-creator");
        let native = app_data
            .join("npm/node_modules/@openai/codex/node_modules/@openai/codex-win32-x64/vendor")
            .join("x86_64-pc-windows-msvc/bin/codex.exe");
        std::fs::create_dir_all(native.parent().expect("native parent"))
            .expect("native target directory");

        let candidates = game_creator_codex_cli_executable_candidates_for(
            None,
            None,
            None,
            Some(&config_dir),
            None,
        );
        assert_eq!(candidates[0], native);
    }

    #[cfg(windows)]
    #[test]
    fn codex_cli_candidates_discover_desktop_native_target() {
        let temp = tempfile::tempdir().expect("temp dir");
        let local_app_data = temp.path().join("local");
        let older = local_app_data.join("OpenAI/Codex/bin/111/codex.exe");
        let newer = local_app_data.join("OpenAI/Codex/bin/222/codex.exe");
        std::fs::create_dir_all(older.parent().expect("older parent")).expect("older dir");
        std::fs::create_dir_all(newer.parent().expect("newer parent")).expect("newer dir");

        let candidates = game_creator_codex_cli_executable_candidates_for(
            None,
            None,
            Some(&local_app_data),
            None,
            None,
        );
        assert_eq!(candidates[0], newer);
        assert_eq!(candidates[1], older);
    }

    #[cfg(windows)]
    #[test]
    fn codex_cli_candidates_prefer_bundled_sidecar_before_npm_and_path() {
        let temp = tempfile::tempdir().expect("temp dir");
        let resources = temp.path().join("resources");
        let bundled = resources.join(GAME_CREATOR_BUNDLED_CODEX_CLI_RELATIVE_PATH);
        std::fs::create_dir_all(bundled.parent().expect("bundled parent")).expect("bundled dir");
        let app_data = temp.path().join("app-data");
        let native = app_data
            .join("npm/node_modules/@openai/codex/node_modules/@openai/codex-win32-x64/vendor")
            .join("x86_64-pc-windows-msvc/bin/codex.exe");
        std::fs::create_dir_all(native.parent().expect("native parent")).expect("native dir");

        let candidates = game_creator_codex_cli_executable_candidates_for(
            Some(&resources),
            Some(&app_data),
            None,
            None,
            None,
        );
        assert_eq!(candidates[0], bundled);
        assert_eq!(candidates[1], native);
    }

    #[cfg(windows)]
    #[test]
    fn bundled_codex_cli_requires_matching_manifest_hash() {
        let temp = tempfile::tempdir().expect("temp dir");
        let executable = temp
            .path()
            .join(GAME_CREATOR_BUNDLED_CODEX_CLI_RELATIVE_PATH);
        std::fs::create_dir_all(executable.parent().expect("sidecar parent")).expect("sidecar dir");
        let bundle_root = executable
            .parent()
            .and_then(Path::parent)
            .expect("bundle root");
        let mut hashes = std::collections::BTreeMap::new();
        for relative in GAME_CREATOR_BUNDLED_CODEX_CLI_REQUIRED_FILES {
            let path = bundle_root.join(relative);
            std::fs::create_dir_all(path.parent().expect("component parent"))
                .expect("component dir");
            let bytes = format!("trusted {relative}");
            std::fs::write(&path, bytes.as_bytes()).expect("component bytes");
            hashes.insert(relative, format!("{:x}", Sha256::digest(bytes.as_bytes())));
        }
        let files = serde_json::to_string(&hashes).expect("component hashes");
        std::fs::write(
            bundle_root.join("manifest.json"),
            format!(
                r#"{{"schemaVersion":"genarrative-codex-sidecar.v2","platform":"win32-x64","version":"codex-cli test","files":{files}}}"#
            ),
        )
        .expect("sidecar manifest");

        assert_eq!(
            validate_game_creator_bundled_codex_cli(&executable).expect("trusted sidecar"),
            "codex-cli test"
        );
        std::fs::write(&executable, b"modified sidecar").expect("tamper sidecar");
        assert!(validate_game_creator_bundled_codex_cli(&executable)
            .expect_err("tampered sidecar must be rejected")
            .contains("完整性校验失败"));
    }

    #[cfg(windows)]
    #[test]
    fn bundled_codex_cli_rejects_a_manifest_without_code_mode_host() {
        let temp = tempfile::tempdir().expect("temp dir");
        let executable = temp
            .path()
            .join(GAME_CREATOR_BUNDLED_CODEX_CLI_RELATIVE_PATH);
        std::fs::create_dir_all(executable.parent().expect("sidecar parent")).expect("sidecar dir");
        let bundle_root = executable
            .parent()
            .and_then(Path::parent)
            .expect("bundle root");
        let bytes = b"codex only";
        std::fs::write(&executable, bytes).expect("codex bytes");
        let hash = format!("{:x}", Sha256::digest(bytes));
        std::fs::write(
            bundle_root.join("manifest.json"),
            format!(
                r#"{{"schemaVersion":"genarrative-codex-sidecar.v2","platform":"win32-x64","version":"codex-cli test","files":{{"bin/codex.exe":"{hash}"}}}}"#
            ),
        )
        .expect("sidecar manifest");

        assert!(validate_game_creator_bundled_codex_cli(&executable)
            .expect_err("missing code-mode host must fail closed")
            .contains("完整性清单不受支持"));
    }

    #[cfg(windows)]
    #[test]
    fn codex_cli_resolver_finds_current_native_install() {
        let executable = game_creator_codex_cli_executable_path().expect("Codex CLI executable");
        assert!(executable.is_absolute());
        assert_eq!(
            game_creator_codex_cli_version_identity().expect("Codex CLI version"),
            game_creator_codex_cli_version_at(&executable).expect("same executable version")
        );
    }

    #[test]
    fn codex_cli_mode_renders_runtime_messages_and_structured_tool_contract() {
        let prompt = render_game_creator_codex_cli_prompt(&tool_request()).expect("render prompt");
        assert!(prompt.contains("runtime_tool_file_read"));
        assert!(prompt.contains("项目行动只能通过返回 Runtime 函数请求完成"));
        assert!(!prompt.contains(GAME_CREATOR_CODEX_CLI_EXECUTABLE));
        let schema = game_creator_codex_cli_tool_output_schema(&tool_request()).expect("schema");
        assert_eq!(
            schema.pointer("/properties/toolCalls/items/properties/name/enum/0"),
            Some(&serde_json::json!("runtime_tool_file_read"))
        );
    }

    #[test]
    fn codex_cli_mode_removes_ambient_api_key_from_effective_environment() {
        let mut command = tokio::process::Command::new("codex");
        command.env("CODEX_API_KEY", "ambient-secret");
        game_creator_codex_cli_minimal_environment(&mut command);
        assert!(!command
            .as_std()
            .get_envs()
            .any(|(name, value)| name == "CODEX_API_KEY" && value.is_some()));
    }

    #[tokio::test]
    async fn codex_cli_mode_bounds_unterminated_output_and_summarizes_stderr_without_raw_text() {
        let output = vec![b'x'; 33];
        let error = read_game_creator_codex_cli_output(output.as_slice(), 32)
            .await
            .expect_err("unterminated output over the cap must fail");
        assert!(error.contains("超过 32 字节上限"));

        let stderr = b"private-auth-detail-without-newline";
        let summary = summarize_game_creator_codex_cli_stderr(stderr.as_slice(), 256)
            .await
            .expect("summarize stderr");
        assert_eq!(summary.classification, "nonempty");
        assert_eq!(summary.byte_len, stderr.len());
        assert_eq!(summary.sha256, format!("{:x}", Sha256::digest(stderr)));
        assert!(!summary.sha256.contains("private-auth-detail"));
    }

    #[test]
    fn codex_cli_mode_maps_structured_agent_message_to_existing_tool_calls() {
        let stdout = concat!(
            "{\"type\":\"thread.started\",\"thread_id\":\"thread-1\"}\n",
            "{\"type\":\"item.completed\",\"item\":{\"type\":\"agent_message\",\"text\":\"{\\\"toolCalls\\\":[{\\\"name\\\":\\\"runtime_tool_file_read\\\",\\\"arguments\\\":\\\"{\\\\\\\"reason\\\\\\\":\\\\\\\"检查\\\\\\\",\\\\\\\"input\\\\\\\":{\\\\\\\"path\\\\\\\":\\\\\\\"game/index.html\\\\\\\"}}\\\"}]}\"}}\n",
            "{\"type\":\"turn.completed\",\"usage\":{\"input_tokens\":12,\"output_tokens\":7}}\n"
        );
        let response = parse_game_creator_codex_cli_response(stdout.as_bytes(), &tool_request())
            .expect("parse response");
        assert_eq!(response.response_id.as_deref(), Some("thread-1"));
        assert_eq!(response.tool_calls.len(), 1);
        assert_eq!(response.tool_calls[0].name, "runtime_tool_file_read");
        assert_eq!(response.usage.expect("usage").total_tokens, 19);
    }

    #[test]
    fn codex_cli_mode_maps_plain_final_message_and_requires_terminal_event() {
        let request = LlmRunRequest::single_turn("系统", "任务");
        let stdout = concat!(
            "{\"type\":\"item.completed\",\"item\":{\"type\":\"agent_message\",\"text\":\"完成\"}}\n",
            "{\"type\":\"turn.completed\",\"usage\":{}}\n"
        );
        let response = parse_game_creator_codex_cli_response(stdout.as_bytes(), &request)
            .expect("parse response");
        assert_eq!(response.text, "完成");
        assert!(response.tool_calls.is_empty());
        assert!(matches!(
            parse_game_creator_codex_cli_response(
                b"{\"type\":\"item.completed\",\"item\":{\"type\":\"agent_message\",\"text\":\"x\"}}\n",
                &request
            ),
            Err(platform_llm::LlmError::Deserialize(_))
        ));

        let recovered_stdout = concat!(
            "{\"type\":\"error\",\"message\":\"Reconnecting\"}\n",
            "{\"type\":\"item.completed\",\"item\":{\"type\":\"agent_message\",\"text\":\"恢复成功\"}}\n",
            "{\"type\":\"turn.completed\",\"usage\":{}}\n"
        );
        assert_eq!(
            parse_game_creator_codex_cli_response(recovered_stdout.as_bytes(), &request)
                .expect("短暂 error 事件后完成")
                .text,
            "恢复成功"
        );
    }

    #[cfg(unix)]
    #[tokio::test]
    async fn codex_cli_mode_builds_ephemeral_json_exec_with_prompt_on_stdin() {
        use std::os::unix::fs::PermissionsExt;

        let temp = tempfile::tempdir().expect("temp dir");
        let executable = temp.path().join("fake-codex");
        std::fs::write(
            &executable,
            r#"#!/bin/sh
prompt="$(cat)"
case "$prompt" in
  *"CODEx_STDIN_MARKER"*) ;;
  *) exit 41 ;;
esac
has_exec=0
has_json=0
has_ephemeral=0
has_ignore_user_config=0
has_read_only=0
has_shell_disabled=0
previous=""
for argument in "$@"; do
  [ "$argument" = "exec" ] && has_exec=1
  [ "$argument" = "--json" ] && has_json=1
  [ "$argument" = "--ephemeral" ] && has_ephemeral=1
  [ "$argument" = "--ignore-user-config" ] && has_ignore_user_config=1
  [ "$previous:$argument" = "--sandbox:read-only" ] && has_read_only=1
  [ "$previous:$argument" = "--disable:shell_tool" ] && has_shell_disabled=1
  previous="$argument"
done
[ "$has_exec$has_json$has_ephemeral$has_ignore_user_config$has_read_only$has_shell_disabled" = "111111" ] || exit 42
printf '%s\n' '{"type":"thread.started","thread_id":"fake-thread"}'
printf '%s\n' '{"type":"item.completed","item":{"type":"agent_message","text":"fixture-ok"}}'
printf '%s\n' '{"type":"turn.completed","usage":{"input_tokens":3,"output_tokens":2}}'
"#,
        )
        .expect("write fake codex");
        let mut permissions = std::fs::metadata(&executable)
            .expect("fake metadata")
            .permissions();
        permissions.set_mode(0o700);
        std::fs::set_permissions(&executable, permissions).expect("chmod fake codex");

        let request = LlmRunRequest::single_turn("系统", "CODEx_STDIN_MARKER");
        let response =
            request_game_creator_agent_codex_cli_with_executable(executable.as_os_str(), request)
                .await
                .expect("fake codex request");
        assert_eq!(response.text, "fixture-ok");
        assert_eq!(response.response_id.as_deref(), Some("fake-thread"));
        assert_eq!(response.usage.expect("usage").total_tokens, 5);
    }

    #[cfg(unix)]
    #[tokio::test]
    async fn codex_cli_mode_does_not_expose_process_stderr_on_failure() {
        use std::os::unix::fs::PermissionsExt;

        let temp = tempfile::tempdir().expect("temp dir");
        let executable = temp.path().join("fake-codex-failure");
        std::fs::write(
            &executable,
            "#!/bin/sh\nprintf '%s\\n' 'secret-auth-detail' >&2\nexit 43\n",
        )
        .expect("write fake codex");
        let mut permissions = std::fs::metadata(&executable)
            .expect("fake metadata")
            .permissions();
        permissions.set_mode(0o700);
        std::fs::set_permissions(&executable, permissions).expect("chmod fake codex");

        let error = request_game_creator_agent_codex_cli_with_executable(
            executable.as_os_str(),
            LlmRunRequest::single_turn("系统", "任务"),
        )
        .await
        .expect_err("fake Codex should fail")
        .to_string();
        assert!(error.contains("code=43"));
        assert!(error.contains("stderrClass=nonempty"));
        assert!(error.contains("stderrBytes=19"));
        assert!(error.contains("stderrSha256="));
        assert!(error.contains("登录状态"));
        assert!(!error.contains("secret-auth-detail"));
    }

    #[cfg(unix)]
    #[tokio::test]
    async fn codex_cli_mode_enforces_runtime_request_timeout() {
        use std::os::unix::fs::PermissionsExt;

        let temp = tempfile::tempdir().expect("temp dir");
        let executable = temp.path().join("fake-codex-timeout");
        std::fs::write(&executable, "#!/bin/sh\ncat >/dev/null\nsleep 30\n")
            .expect("write fake codex");
        let mut permissions = std::fs::metadata(&executable)
            .expect("fake metadata")
            .permissions();
        permissions.set_mode(0o700);
        std::fs::set_permissions(&executable, permissions).expect("chmod fake codex");

        let error = request_game_creator_agent_codex_cli_with_executable(
            executable.as_os_str(),
            LlmRunRequest::single_turn("系统", "任务").with_request_timeout_ms(20),
        )
        .await
        .expect_err("fake Codex should time out");
        assert_eq!(error, platform_llm::LlmError::Timeout { attempts: 1 });
    }

    #[tokio::test]
    #[ignore = "requires an installed and authenticated Codex CLI"]
    async fn codex_cli_real_smoke_uses_existing_local_auth() {
        let request = LlmRunRequest::single_turn(
            "只回复指定文本，不使用任何工具。",
            "请只回复 CODEX_CLI_SMOKE_OK",
        );
        let response = request_game_creator_agent_codex_cli(request)
            .await
            .expect("real Codex CLI request");
        assert_eq!(response.text.trim(), "CODEX_CLI_SMOKE_OK");
        assert!(response.tool_calls.is_empty());
    }
}