// voice_cdp.js —— Codex 语音输入注入：主进程侧。
// 用 CDP（Chrome DevTools Protocol）连接带 --remote-debugging-port 的 Codex 桌面版，
// 往其页面注入麦克风按钮脚本，录音经 binding 回传 → 调中转站 Whisper 转写 → 文字回填 composer。
// 不改 Codex 源码、不写补丁文件。无第三方依赖：CDP over WebSocket 用 Node 内置 net 手写最小 WS 客户端
// （Electron 34 主进程的 Node 无全局 WebSocket）；HTTP 用全局 fetch；multipart 用全局 FormData/Blob。
//
// 机制参考 CodexPlusPlus 的 bridge.rs：Runtime.evaluate / Page.addScriptToEvaluateOnNewDocument /
// Runtime.addBinding + Runtime.bindingCalled。
const { spawn, execFile } = require("child_process");
const os = require("os");
const path = require("path");
const net = require("net");
const crypto = require("crypto");

function dlog(...a) { try { console.log("[voice]", ...a); } catch {} }
const router = require("./router");
const providerSync = require("./provider_sync");
const { INJECT_SCRIPT } = require("./voice_inject");
const { TOKEN_INJECT_SCRIPT } = require("./token_inject");
const tokenUsage = require("./token_usage");

const DEFAULT_PORT = 19222; // Codex 调试端口（避开 Chrome 默认 9222）
const BINDING_NAME = "__voiceBridge"; // 页面 → 主进程 的 CDP binding
const CDP_HTTP_TIMEOUT = 3000; // GET /json 超时
const CDP_WS_TIMEOUT = 5000; // WebSocket 握手超时
const CDP_CMD_TIMEOUT = 5000; // 单条 CDP 命令超时
const READY_POLL_INTERVAL = 500; // 轮询就绪间隔
const READY_POLL_MAX_MS = 20000; // 轮询就绪最长等待
const RECORD_MAX_MS = 60000; // 单次录音上限（注入脚本侧也限）

// —— 状态机 ——
// unknown / checking / not_running / running_no_port / restarting / connecting /
// injecting / connected / disconnected / error
let state = {
  phase: "unknown",
  port: DEFAULT_PORT,
  codexPath: "",
  lastError: "",
  target: null, // { id, url, title }
};
let session = null; // 当前 CdpSession
let networkSessions = []; // worker 等附加 target 的 Network 监听 session
let networkAttachGeneration = 0;
let onStatusCb = null;
let tokenSyncTimer = null;

function snapshot() {
  const { phase, port, codexPath, lastError, model, target } = state;
  return { phase, port, codexPath, lastError, model, target };
}
function setPhase(phase, extra = {}) {
  state = { ...state, phase, ...extra };
  if (onStatusCb) {
    try {
      onStatusCb(snapshot());
    } catch {}
  }
}

async function syncTokenUsage() {
  if (!session) return;
  const usage = tokenUsage.readDaily();
  if (!usage || !usage.available) return;
  try {
    await session.send("Runtime.evaluate", {
      expression: "window.__tdTokenSet && window.__tdTokenSet(" + JSON.stringify(usage) + ")",
      awaitPromise: false,
    });
  } catch {}
}

function startTokenSync() {
  if (tokenSyncTimer) clearInterval(tokenSyncTimer);
  tokenSyncTimer = setInterval(() => { syncTokenUsage().catch(() => {}); }, 2500);
  syncTokenUsage().catch(() => {});
}

function stopTokenSync() {
  if (tokenSyncTimer) clearInterval(tokenSyncTimer);
  tokenSyncTimer = null;
}

// —— 探测 Codex 可执行路径 ——
function codexExecutable() {
  const home = os.homedir();
  if (process.platform === "darwin") {
    const cands = [
      path.join(home, "Applications/ChatGPT.app/Contents/MacOS/ChatGPT"),
      "/Applications/ChatGPT.app/Contents/MacOS/ChatGPT",
      "/Applications/Codex.app/Contents/MacOS/Codex",
    ];
    for (const p of cands) {
      try {
        if (require("fs").existsSync(p)) return p;
      } catch {}
    }
    return "";
  }
  if (process.platform === "win32") {
    const local = process.env.LOCALAPPDATA || "";
    const pf = process.env["ProgramFiles"] || "C:\\Program Files";
    const cands = [
      local && path.join(local, "Programs\\ChatGPT\\ChatGPT.exe"),
      path.join(pf, "ChatGPT\\ChatGPT.exe"),
    ].filter(Boolean);
    for (const p of cands) {
      try {
        if (require("fs").existsSync(p)) return p;
      } catch {}
    }
    return "";
  }
  return "";
}

// —— HTTP：GET /json 取 targets ——
async function listTargets(port) {
  const ctrl = new AbortController();
  const t = setTimeout(() => ctrl.abort(), CDP_HTTP_TIMEOUT);
  try {
    const res = await fetch(`http://127.0.0.1:${port}/json`, { signal: ctrl.signal });
    if (!res.ok) return [];
    const arr = await res.json();
    return Array.isArray(arr) ? arr : [];
  } catch {
    return [];
  } finally {
    clearTimeout(t);
  }
}

// —— 挑可注入的 Codex 主页面 target ——
// Codex 可能有多个 page：主对话页 app://-/index.html，以及 avatar-overlay / global-dictation
// 等带 ?initialRoute= 的子路由覆盖层。优先选「无 query 的主入口」，次选普通 codex 页，排除覆盖层。
function pickTarget(targets) {
  let main = null; // url 恰为 app://-/index.html（无 query）
  let fallback = null; // 其它非覆盖层 codex 页
  for (const t of targets) {
    if (t.type !== "page") continue;
    const ws = t.webSocketDebuggerUrl;
    if (!ws) continue;
    const url = (t.url || "").toLowerCase();
    const title = (t.title || "").toLowerCase();
    // 覆盖层：带 initialRoute 的子路由（avatar-overlay / global-dictation 等）
    const isOverlayRoute = url.includes("initialroute=");
    const isCodex =
      url.startsWith("app://-/index.html") || url.includes("index.html") || title.includes("codex");
    if (!isCodex) continue;
    if (isOverlayRoute) continue; // 覆盖层不注入
    if (url === "app://-/index.html" || url === "app://-/index.html/") {
      main = main || t;
    } else {
      fallback = fallback || t;
    }
  }
  return main || fallback;
}

// —— 最小 WebSocket 客户端（Node 内置 net，无需依赖；仅支持 CDP 需要的文本帧）——
// 解析 ws://host:port/path，TCP 连接 → HTTP 升级握手（带 Sec-WebSocket-Key）→ 文本帧收发。
// 客户端发送必须掩码；CDP 服务端发送不掩码。帧可能分片到达，用缓冲区拼。
function wsConnect(wsUrl) {
  const u = new URL(wsUrl);
  const host = u.hostname;
  const port = u.port || (u.protocol === "wss:" ? "443" : "80");
  const pathStr = u.pathname + u.search;
  const key = crypto.randomBytes(16).toString("base64");

  const socket = net.connect({ host, port: Number(port) });
  const events = { open: [], message: [], close: [], error: [] };
  const emit = (name, arg) => (events[name] || []).forEach((cb) => cb(arg));
  socket.setTimeout(CDP_WS_TIMEOUT, () => {
    if (!handshakeDone) emit("error", new Error("WS 连接超时"));
    try { socket.destroy(); } catch {}
  });

  // —— 发送一帧文本（客户端必须掩码）——
  function sendFrame(str) {
    const payload = Buffer.from(str, "utf8");
    const len = payload.length;
    // opcode 1 = 文本；FIN=1
    let header;
    const mask = crypto.randomBytes(4);
    if (len < 126) {
      header = Buffer.alloc(6);
      header[0] = 0x81;
      header[1] = 0x80 | len;
      mask.copy(header, 2);
    } else if (len < 65536) {
      header = Buffer.alloc(8);
      header[0] = 0x81;
      header[1] = 0x80 | 126;
      header.writeUInt16BE(len, 2);
      mask.copy(header, 4);
    } else {
      header = Buffer.alloc(14);
      header[0] = 0x81;
      header[1] = 0x80 | 127;
      header.writeUInt32BE(0, 2);
      header.writeUInt32BE(len, 6);
      mask.copy(header, 10);
    }
    const masked = Buffer.alloc(len);
    for (let i = 0; i < len; i++) masked[i] = payload[i] ^ mask[i & 3];
    socket.write(Buffer.concat([header, masked]));
  }

  // —— 接收缓冲 + 帧解析 ——
  let buf = Buffer.alloc(0);
  let handshakeDone = false;
  function parseFrames() {
    while (true) {
      if (buf.length < 2) return;
      const b0 = buf[0];
      const b1 = buf[1];
      const opcode = b0 & 0x0f;
      const masked = (b1 & 0x80) !== 0;
      let payloadLen = b1 & 0x7f;
      let offset = 2;
      if (payloadLen === 126) {
        if (buf.length < 4) return;
        payloadLen = buf.readUInt16BE(2);
        offset = 4;
      } else if (payloadLen === 127) {
        if (buf.length < 10) return;
        // 高 32 位忽略（CDP 帧不会那么大）
        payloadLen = Number(buf.readUInt32BE(6));
        offset = 10;
      }
      let maskKey = null;
      if (masked) {
        if (buf.length < offset + 4) return;
        maskKey = buf.slice(offset, offset + 4);
        offset += 4;
      }
      if (buf.length < offset + payloadLen) return;
      let payload = buf.slice(offset, offset + payloadLen);
      if (masked) {
        const un = Buffer.alloc(payload.length);
        for (let i = 0; i < payload.length; i++) un[i] = payload[i] ^ maskKey[i & 3];
        payload = un;
      }
      buf = buf.slice(offset + payloadLen);
      // 只处理文本(1)/ping(9)/pong(10)/关闭(8)
      if (opcode === 0x8) {
        // 关闭帧
        emit("close");
        try {
          socket.end();
        } catch {}
        return;
      } else if (opcode === 0x9) {
        // ping → 回 pong（无掩码服务端不要求，但回时按服务端→客户端本可不掩码；此处回文本帧不规范，CDP 不发 ping）
        continue;
      } else if (opcode === 0xa) {
        continue; // pong，忽略
      } else {
        // 文本帧（含分片首帧 opcode 0 也按文本拼；CDP 单帧文本足够，简单按单帧处理）
        emit("message", payload.toString("utf8"));
      }
    }
  }

  socket.on("connect", () => {
    const req =
      `GET ${pathStr} HTTP/1.1\r\n` +
      `Host: ${host}:${port}\r\n` +
      `Upgrade: websocket\r\n` +
      `Connection: Upgrade\r\n` +
      `Sec-WebSocket-Key: ${key}\r\n` +
      `Sec-WebSocket-Version: 13\r\n\r\n`;
    socket.write(req);
  });
  socket.on("data", (chunk) => {
    buf = Buffer.concat([buf, chunk]);
    if (!handshakeDone) {
      const idx = buf.indexOf("\r\n\r\n");
      if (idx < 0) return;
      const head = buf.slice(0, idx).toString("utf8");
      buf = buf.slice(idx + 4);
      if (!/101/.test(head.split("\r\n")[0])) {
        emit("error", new Error("WS 握手失败: " + head.split("\r\n")[0]));
        try {
          socket.destroy();
        } catch {}
        return;
      }
      handshakeDone = true;
      try { socket.setTimeout(0); } catch {}
      emit("open");
      parseFrames();
    } else {
      parseFrames();
    }
  });
  socket.on("close", () => emit("close"));
  socket.on("error", (e) => emit("error", e));

  return {
    send: sendFrame,
    close: () => {
      try {
        socket.destroy();
      } catch {}
    },
    on: (name, cb) => {
      (events[name] = events[name] || []).push(cb);
    },
    _socket: socket,
  };
}

// —— CDP WebSocket 会话 ——
function openSession(wsUrl, onBindingCalled) {
  const pending = new Map(); // id → {resolve, reject}
  const handlers = new Map(); // method → Set<cb>
  let nextId = 1;
  let closed = false;
  const ws = wsConnect(wsUrl);

  function send(method, params = {}) {
    return new Promise((resolve, reject) => {
      if (closed) return reject(new Error("CDP 会话已关闭"));
      const id = nextId++;
      const timer = setTimeout(() => {
        pending.delete(id);
        reject(new Error("CDP 命令超时: " + method));
      }, CDP_CMD_TIMEOUT);
      pending.set(id, {
        resolve: (value) => {
          clearTimeout(timer);
          resolve(value);
        },
        reject: (err) => {
          clearTimeout(timer);
          reject(err);
        },
      });
      ws.send(JSON.stringify({ id, method, params }));
    });
  }
  function on(method, cb) {
    if (!handlers.has(method)) handlers.set(method, new Set());
    handlers.get(method).add(cb);
  }
  function close() {
    closed = true;
    try {
      ws.close();
    } catch {}
  }

  ws.on("message", (data) => {
    let msg;
    try {
      msg = JSON.parse(data);
    } catch {
      return;
    }
    if (msg.id != null) {
      const p = pending.get(msg.id);
      if (!p) return;
      pending.delete(msg.id);
      if (msg.error) p.reject(new Error(msg.error.message || "CDP error"));
      else p.resolve(msg.result);
      return;
    }
    if (msg.method) {
      if (msg.method === "Runtime.bindingCalled" && onBindingCalled) {
        try {
          onBindingCalled(msg.params);
        } catch {}
      }
      const set = handlers.get(msg.method);
      if (set) for (const cb of set) cb(msg.params);
    }
  });
  ws.on("close", () => {
    closed = true;
    for (const { reject } of pending.values()) {
      try {
        reject(new Error("CDP 会话关闭"));
      } catch {}
    }
    pending.clear();
  });

  return new Promise((resolve, reject) => {
    ws.on("open", () => resolve({ send, on, close, ws }));
    ws.on("error", (e) => reject(new Error("CDP 连接失败：" + (e && e.message ? e.message : "ws error"))));
  });
}

// —— 转写：中转站 /v1/audio/transcriptions（用 sttGroup：勾选了 STT 的分组）——
async function runStt(audioB64, mime) {
  const g = router.sttGroup();
  if (!g || !g.baseUrl || !g.key) throw new Error("未配置支持语音转文字的中转分组（在路由中转里勾选「支持语音转文字」）");
  const base = (g.baseUrl || "").replace(/\/+$/, "");
  const model = g.sttModel || "whisper-1";
  const buf = Buffer.from(audioB64, "base64");
  const ext = mime && mime.includes("webm") ? "webm" : mime && mime.includes("mp4") ? "mp4" : "wav";
  const form = new FormData();
  form.append("file", new Blob([buf], { type: mime || "audio/webm" }), `voice.${ext}`);
  form.append("model", model);
  form.append("response_format", "json");
  const res = await fetch(base + "/v1/audio/transcriptions", {
    method: "POST",
    headers: { Authorization: "Bearer " + g.key },
    body: form,
  });
  dlog("转写请求 →", base + "/v1/audio/transcriptions", "model=" + model, "size=" + buf.length, "HTTP " + res.status);
  if (!res.ok) {
    const detail = await res.text().catch(() => "");
    throw new Error(`转写接口 HTTP ${res.status}：${detail.slice(0, 300)}`);
  }
  const j = await res.json();
  return (j && (j.text || "")).trim();
}

// —— 主进程收到页面 binding 回传：处理转写并把文字送回页面 ——
async function handleBinding(params) {
  const name = params && params.name;
  if (name !== BINDING_NAME) return;
  let payload;
  try {
    payload = JSON.parse(params.payload);
  } catch {
    return;
  }
  if (!payload || payload.kind !== "transcribe") return;
  const { id, audioB64, mime } = payload;
  dlog("binding 收到转写请求 id=" + id, "mime=" + mime, "audioB64长度=" + (audioB64?audioB64.length:0));
  setPhase("transcribing");
  let text = "";
  let err = "";
  try {
    text = await runStt(audioB64, mime);
    dlog("转写结果:", JSON.stringify(text).slice(0, 120));
  } catch (e) {
    err = String((e && e.message) || e);
    dlog("转写失败:", err);
  }
  setPhase(connectedPhase());
  // 把结果回调给页面
  const expr = `window.__voiceInjectHandle && window.__voiceInjectHandle(${JSON.stringify(
    { id, text, err }
  )})`;
  try {
    if (session) await session.send("Runtime.evaluate", { expression: expr, awaitPromise: false });
  } catch {}
}

function connectedPhase() {
  return session ? "connected" : "disconnected";
}

// —— 注入：addBinding + addScriptToEvaluateOnNewDocument + 立即 evaluate + Network 监听 ——
async function inject(sessionObj) {
  await sessionObj.send("Runtime.enable");
  try {
    await sessionObj.send("Runtime.removeBinding", { name: BINDING_NAME });
  } catch {}
  await sessionObj.send("Runtime.addBinding", { name: BINDING_NAME });
  await sessionObj.send("Page.enable");
  // 语音注入脚本
  await sessionObj.send("Page.addScriptToEvaluateOnNewDocument", { source: INJECT_SCRIPT });
  await sessionObj.send("Runtime.evaluate", { expression: INJECT_SCRIPT, awaitPromise: false });
  // Token 用量 UI 注入脚本（只负责 UI + localStorage，不管网络抓取）
  await sessionObj.send("Page.addScriptToEvaluateOnNewDocument", { source: TOKEN_INJECT_SCRIPT });
  await sessionObj.send("Runtime.evaluate", { expression: TOKEN_INJECT_SCRIPT, awaitPromise: false });
  // 启用 Network 域，在 CDP 层面拦截 LLM 响应抓 token 用量
  await sessionObj.send("Network.enable");
}

// ============================================================================
//  Token 用量：CDP Network 域拦截 LLM 响应抓 usage（不受页面 CSP 限制）
// ============================================================================
// 待完成的请求：requestId → { url, mimeType }
const pendingNetworkReqs = new Map();
let nextNetworkSessionId = 1;
const tokenNet = {
  matchedCount: 0,
  usageCount: 0,
  noUsageCount: 0,
  lastMatchedUrl: "",
  lastUsageUrl: "",
  lastNoUsageUrl: "",
  lastUsageTotal: 0,
  lastError: "",
  attachedWorkers: 0,
};
const LLM_URL_RE = /\/(chat\/completions|v1\/messages|messages|generateContent|streamGenerateContent|completions|responses|backend-api\/(?:codex|conversation|responses)|codex|conversation)(\/|$|\?)/i;

function networkReqKey(ownerSession, requestId) {
  if (!ownerSession._tdTokenNetId) ownerSession._tdTokenNetId = nextNetworkSessionId++;
  return ownerSession._tdTokenNetId + ":" + requestId;
}

function bindNetworkHandlers(ownerSession) {
  if (!ownerSession) return;
  if (!ownerSession._tdTokenNetId) ownerSession._tdTokenNetId = nextNetworkSessionId++;
  ownerSession.on("Network.responseReceived", (params) => handleNetworkResponse(params, ownerSession));
  ownerSession.on("Network.loadingFinished", (params) => handleNetworkLoadingFinished(params, ownerSession));
  ownerSession.on("Network.loadingFailed", (params) => handleNetworkLoadingFailed(params, ownerSession));
}

function handleNetworkResponse(params, ownerSession) {
  const { requestId, response } = params || {};
  if (!requestId || !response || !ownerSession) return;
  const url = response.url || "";
  if (!LLM_URL_RE.test(url)) return;
  // 只处理 JSON 响应
  const mime = (response.mimeType || "").toLowerCase();
  if (!mime.includes("json") && !mime.includes("text")) return;
  tokenNet.matchedCount += 1;
  tokenNet.lastMatchedUrl = url;
  pendingNetworkReqs.set(networkReqKey(ownerSession, requestId), { url, mimeType: mime });
}

function handleNetworkLoadingFailed(params, ownerSession) {
  const { requestId } = params || {};
  if (requestId && ownerSession) pendingNetworkReqs.delete(networkReqKey(ownerSession, requestId));
}

async function handleNetworkLoadingFinished(params, ownerSession) {
  const { requestId } = params || {};
  if (!requestId || !ownerSession) return;
  const key = networkReqKey(ownerSession, requestId);
  if (!pendingNetworkReqs.has(key)) return;
  const reqInfo = pendingNetworkReqs.get(key) || {};
  pendingNetworkReqs.delete(key);
  if (!session || !ownerSession) return;
  try {
    const r = await ownerSession.send("Network.getResponseBody", { requestId });
    const body = (r && r.body) || "";
    if (!body || body.length < 10) return;
    // 可能被 base64 编码
    let text = body;
    if (r && r.base64Encoded) {
      try { text = Buffer.from(body, "base64").toString("utf8"); } catch { return; }
    }
    // 解析 JSON 提取 usage
    const usage = extractUsageFromText(text);
    if (usage && usage.total > 0) {
      tokenNet.usageCount += 1;
      tokenNet.lastUsageUrl = reqInfo.url || "";
      tokenNet.lastUsageTotal = usage.total || 0;
      tokenNet.lastError = "";
      dlog(
        "token: +" + usage.total +
          " input=" + (usage.input || 0) +
          " output=" + (usage.output || 0) +
          " cached=" + (usage.cached || 0) +
          " from",
        reqInfo.url || "?"
      );
      // 通过 Runtime.evaluate 调注入脚本更新 UI
      try {
        await session.send("Runtime.evaluate", {
          expression: "window.__tdTokenAdd && window.__tdTokenAdd(" + JSON.stringify(usage) + ", 'network')",
          awaitPromise: false,
        });
      } catch {}
    } else {
      tokenNet.noUsageCount += 1;
      tokenNet.lastNoUsageUrl = reqInfo.url || "";
    }
  } catch (e) {
    tokenNet.lastError = String((e && e.message) || e || "getResponseBody failed").slice(0, 160);
    // getResponseBody 可能失败（响应体已被清掉或太大），静默跳过
  }
}

function extractUsageFromText(text) {
  let best = null;
  const take = (obj) => {
    best = betterUsage(best, extractUsageFromObject(obj));
  };
  try {
    take(JSON.parse(text));
  } catch {}
  if (usageTotal(best) > 0) return best;

  // Stream/SSE: data: {"usage":...}\n\n or data: [DONE]
  const lines = String(text || "").split(/\r?\n/);
  for (const line of lines) {
    const s = line.trim();
    const payload = s.startsWith("data:") ? s.slice(5).trim() : s;
    if (!payload || payload === "[DONE]") continue;
    try { take(JSON.parse(payload)); } catch {}
  }
  return best;
}

function cleanTokenNumber(n) {
  n = Number(n);
  return Number.isFinite(n) && n > 0 ? Math.round(n) : 0;
}

function usageTotal(u) {
  return u ? cleanTokenNumber(u.total) : 0;
}

function betterUsage(a, b) {
  return usageTotal(b) > usageTotal(a) ? b : a;
}

function hasOwn(obj, key) {
  return Object.prototype.hasOwnProperty.call(obj, key);
}

function looksLikeUsage(usage) {
  if (!usage || typeof usage !== "object") return false;
  const keys = [
    "input_tokens", "prompt_tokens", "output_tokens", "completion_tokens", "total_tokens",
    "promptTokenCount", "prompt_token_count", "inputTokenCount", "outputTokenCount",
    "candidatesTokenCount", "candidates_token_count", "totalTokenCount", "total_token_count",
    "token_count", "cache_creation_input_tokens", "cache_read_input_tokens",
    "cachedContentTokenCount", "cached_content_token_count", "reasoning_tokens",
    "thoughtsTokenCount", "thoughts_token_count",
  ];
  if (keys.some((key) => hasOwn(usage, key))) return true;
  return hasOwn(usage, "total") && (hasOwn(usage, "input") || hasOwn(usage, "output") || hasOwn(usage, "cached"));
}

function extractUsageFromRawUsage(usage) {
  if (!usage || typeof usage !== "object") return null;
  if (!looksLikeUsage(usage)) return null;
  const input = cleanTokenNumber(
    usage.input_tokens ||
      usage.prompt_tokens ||
      usage.promptTokenCount ||
      usage.prompt_token_count ||
      usage.inputTokenCount
  );
  const output = cleanTokenNumber(
    usage.output_tokens ||
      usage.completion_tokens ||
      usage.candidatesTokenCount ||
      usage.candidates_token_count ||
      usage.outputTokenCount
  );
  const reasoning = cleanTokenNumber(usage.reasoning_tokens || usage.thoughtsTokenCount || usage.thoughts_token_count);
  const details = usage.input_tokens_details || usage.prompt_tokens_details || usage.inputTokenDetails || usage.promptTokenDetails || {};
  const cached =
    cleanTokenNumber(details.cached_tokens) +
    cleanTokenNumber(usage.cache_creation_input_tokens) +
    cleanTokenNumber(usage.cache_read_input_tokens) +
    cleanTokenNumber(usage.cachedContentTokenCount) +
    cleanTokenNumber(usage.cached_content_token_count);
  const total = cleanTokenNumber(
    usage.total_tokens ||
      usage.totalTokenCount ||
      usage.total_token_count ||
      usage.token_count ||
      usage.total
  ) || input + output + reasoning + cached;
  if (!total) return null;
  return { total, input, output: output + reasoning, cached };
}

function extractUsageFromObject(obj) {
  if (!obj || typeof obj !== "object") return null;
  const direct =
    extractUsageFromRawUsage(obj.usage) ||
    extractUsageFromRawUsage(obj.usage_metadata) ||
    extractUsageFromRawUsage(obj.usageMetadata) ||
    extractUsageFromRawUsage(obj);
  if (direct) return direct;
  let best = null;
  for (const val of Object.values(obj)) {
    if (!val || typeof val !== "object") continue;
    if (Array.isArray(val)) {
      for (const item of val) best = betterUsage(best, extractUsageFromObject(item));
    } else {
      best = betterUsage(best, extractUsageFromObject(val));
    }
  }
  return best;
}

async function attachNetworkSession(target, generation) {
  if (!target || !target.webSocketDebuggerUrl) return;
  let netSession = null;
  try {
    netSession = await openSession(target.webSocketDebuggerUrl, null);
    bindNetworkHandlers(netSession);
    await netSession.send("Network.enable");
    if (!session || generation !== networkAttachGeneration) {
      try { netSession.close(); } catch {}
      return false;
    }
    networkSessions.push(netSession);
    dlog("token network attached:", target.type || "target", target.id || "", target.url || "");
    return true;
  } catch (e) {
    if (netSession) {
      try { netSession.close(); } catch {}
    }
    tokenNet.lastError = String((e && e.message) || e || "attach network failed").slice(0, 160);
    return false;
  }
}

async function attachWorkerNetworkTargets(port, parentId) {
  const targets = await listTargets(port);
  const workers = targets.filter((t) =>
    t &&
    t.webSocketDebuggerUrl &&
    (t.type === "worker" || t.type === "service_worker" || t.type === "shared_worker") &&
    (!parentId || t.parentId === parentId)
  );
  const generation = networkAttachGeneration;
  const results = await Promise.all(workers.map((worker) => attachNetworkSession(worker, generation)));
  tokenNet.attachedWorkers = results.filter(Boolean).length;
}

function closeNetworkSessions() {
  networkAttachGeneration += 1;
  for (const s of networkSessions) {
    try { s.close(); } catch {}
  }
  networkSessions = [];
  pendingNetworkReqs.clear();
}

// —— 连接到已带端口的 Codex ——
async function connectToTarget(port) {
  const targets = await listTargets(port);
  const tgt = pickTarget(targets);
  if (!tgt) return false;
  closeNetworkSessions();
  state.target = { id: tgt.id, url: tgt.url, title: tgt.title };
  setPhase("connecting");
  session = await openSession(tgt.webSocketDebuggerUrl, handleBinding);
  session.on("Runtime.bindingCalled", handleBinding);
  // Token 用量：Network 层拦截 LLM 响应
  bindNetworkHandlers(session);
  session.ws.on("close", () => {
    stopTokenSync();
    closeNetworkSessions();
    session = null;
    setPhase("disconnected");
  });
  setPhase("injecting");
  await inject(session);
  startTokenSync();
  setPhase("connected", { target: state.target });
  attachWorkerNetworkTargets(port, tgt.id).catch((e) => {
    tokenNet.lastError = String((e && e.message) || e || "attach workers failed").slice(0, 160);
  });
  return true;
}

// —— 轮询直到出现 page target（重启后用）——
async function waitForReady(port) {
  const t0 = Date.now();
  while (Date.now() - t0 < READY_POLL_MAX_MS) {
    const targets = await listTargets(port);
    const tgt = pickTarget(targets);
    if (tgt) return tgt;
    await new Promise((r) => setTimeout(r, READY_POLL_INTERVAL));
  }
  return null;
}

// —— 启动接管：杀当前 Codex → 带端口重启 ——
function killCodex() {
  return new Promise((resolve) => {
    if (process.platform === "darwin") {
      execFile("osascript", ["-e", 'tell application "ChatGPT" to quit'], () => {
        // 兜底：osascript 没杀掉就 pkill
        execFile("pgrep", ["-f", "ChatGPT.app/Contents/MacOS/ChatGPT"], (_e, out) => {
          if (out && out.trim()) {
            execFile("pkill", ["-f", "ChatGPT.app/Contents/MacOS/ChatGPT"], () =>
              setTimeout(resolve, 800)
            );
          } else resolve();
        });
      });
    } else if (process.platform === "win32") {
      execFile("taskkill", ["/IM", "ChatGPT.exe", "/F"], () =>
        setTimeout(resolve, 800)
      );
    } else resolve();
  });
}
function spawnCodex(exePath, port) {
  const child = spawn(exePath, [`--remote-debugging-port=${port}`], {
    detached: true,
    stdio: "ignore",
  });
  try {
    child.unref();
  } catch {}
}

// —— 对外：status / connect / disconnect ——
function status() {
  return snapshot();
}
function onStatus(cb) {
  onStatusCb = cb;
}

// connect(onStatusCb)：流程见计划。forceRestart=true 时直接重启（前端已确认）。
async function connect(cb, opts = {}) {
  if (cb) onStatusCb = cb;
  const port = opts.port || DEFAULT_PORT;
  state.port = port;
  setPhase("checking");
  // 1. 端口已开？
  const ok = await connectToTarget(port);
  if (ok) return snapshot();
  // 2. 判断 Codex 是否在跑
  const running = providerSync.codexRunning ? providerSync.codexRunning() : false;
  if (!running && !opts.forceRestart) {
    // 没在跑也没开端口：直接尝试拉起带端口的实例（无需杀进程）
    const exe = codexExecutable();
    if (!exe) {
      setPhase("error", { lastError: "未找到 Codex 可执行文件" });
      return snapshot();
    }
    state.codexPath = exe;
    setPhase("restarting", { codexPath: exe });
    spawnCodex(exe, port);
    const tgt = await waitForReady(port);
    if (!tgt) {
      setPhase("error", { lastError: "Codex 启动后未开放调试端口，请重试" });
      return snapshot();
    }
    const ok2 = await connectToTarget(port);
    if (!ok2) setPhase("error", { lastError: "已启动但未找到可注入页面" });
    return snapshot();
  }
  // 3. 在跑但没端口：需用户在前端确认后 forceRestart 重启
  if (running && !opts.forceRestart) {
    state.codexPath = codexExecutable();
    setPhase("running_no_port", { codexPath: state.codexPath });
    return snapshot(); // 前端据此弹"重启确认"
  }
  // 4. forceRestart：杀进程 → 重启
  const exe = codexExecutable();
  if (!exe) {
    setPhase("error", { lastError: "未找到 Codex 可执行文件" });
    return snapshot();
  }
  state.codexPath = exe;
  setPhase("restarting");
  await killCodex();
  spawnCodex(exe, port);
  const tgt = await waitForReady(port);
  if (!tgt) {
    setPhase("error", { lastError: "重启 Codex 后未开放调试端口" });
    return snapshot();
  }
  const ok3 = await connectToTarget(port);
  if (!ok3) setPhase("error", { lastError: "已启动但未找到可注入页面" });
  return snapshot();
}

function disconnect() {
  stopTokenSync();
  closeNetworkSessions();
  if (session) {
    try {
      session.close();
    } catch {}
    session = null;
  }
  setPhase("disconnected");
  return snapshot();
}

// 当前语音转写配置（来自路由里勾选 STT 的分组），供前端只读展示。
function sttInfo() {
  const g = router.sttGroup();
  if (!g) return { ready: false, groupName: "", model: "" };
  return {
    ready: true,
    groupName: g.name || "",
    model: g.sttModel || "whisper-1",
    baseUrl: (g.baseUrl || "").replace(/\/+$/, ""),
  };
}

// 诊断：用每个非默认分组的真 key 探测 /v1/audio/transcriptions 是否存在。
// 404 = 路径不存在(不支持STT)；400/401/4xx-body非404/200 = 路径存在(支持，鉴权/参数问题另算)。
async function probeStt() {
  const groups = router.usableGroups ? router.usableGroups() : [];
  const out = [];
  const body = Buffer.from([0x1a, 0x45, 0xdf, 0xa3]); // 假 webm 头，只为触发路径判断
  for (const g of groups) {
    const base = (g.baseUrl || "").replace(/\/+$/, "");
    if (!base || !g.key) { out.push({ name: g.name, baseUrl: base, status: 0, note: "缺地址或密钥" }); continue; }
    try {
      const form = new FormData();
      form.append("file", new Blob([body], { type: "audio/webm" }), "v.webm");
      form.append("model", g.sttModel || "whisper-1");
      const res = await fetch(base + "/v1/audio/transcriptions", {
        method: "POST",
        headers: { Authorization: "Bearer " + g.key },
        body: form,
      });
      const text = await res.text().catch(() => "");
      const notFound = res.status === 404 || /404 page not found|not found/i.test(text.slice(0, 60));
      out.push({
        name: g.name,
        baseUrl: base,
        status: res.status,
        supported: !notFound,
        note: text.slice(0, 120).replace(/\s+/g, " "),
      });
    } catch (e) {
      out.push({ name: g.name, baseUrl: base, status: 0, supported: false, note: String((e && e.message) || e).slice(0, 120) });
    }
  }
  return out;
}

// —— Token 用量读取 / 重置（通过 CDP Runtime.evaluate 调注入脚本的 window API）——
async function tokenStatus() {
  if (!session) return { date: "", total: 0 };
  try {
    const r = await session.send("Runtime.evaluate", {
      expression: "window.__tdTokenGet ? window.__tdTokenGet() : JSON.stringify({date:'',total:0})",
      awaitPromise: false,
    });
    const raw = (r && r.result && r.result.value) || "";
    const parsed = (() => { try { return JSON.parse(raw); } catch { return { date: "", total: 0 }; } })();
    return {
      date: parsed.date || "",
      total: Number(parsed.total) || 0,
      input: Number(parsed.input) || 0,
      output: Number(parsed.output) || 0,
      cached: Number(parsed.cached) || 0,
      estimate: Number(parsed.estimate || parsed.estimated) || 0,
      unknown: Number(parsed.unknown) || 0,
      lastSource: parsed.lastSource || parsed.source || "",
      network: { ...tokenNet },
    };
  } catch {
    return { date: "", total: 0 };
  }
}
async function tokenSet(usage) {
  if (!session) return false;
  try {
    await session.send("Runtime.evaluate", {
      expression: "window.__tdTokenSet && window.__tdTokenSet(" + JSON.stringify(usage || {}) + ")",
      awaitPromise: false,
    });
    return true;
  } catch {
    return false;
  }
}
async function tokenReset() {
  if (!session) return false;
  try {
    await session.send("Runtime.evaluate", {
      expression: "window.__tdTokenReset ? window.__tdTokenReset() : 'no'",
      awaitPromise: false,
    });
    return true;
  } catch {
    return false;
  }
}

module.exports = {
  status,
  connect,
  disconnect,
  onStatus,
  sttInfo,
  probeStt,
  tokenStatus,
  tokenSet,
  tokenReset,
  // 供临时实测脚本复用
  _listTargets: listTargets,
  _pickTarget: pickTarget,
  _openSession: openSession,
  _inject: inject,
  DEFAULT_PORT,
};