// router.js —— 本地路由/中转代理：Codex 直连本地，默认指令经 activeId 转发；
// 若请求显式携带已登记的 model，则按 model 路由到对应分组，支持总控/子 Agent 分组并行。
const http = require("http");
const https = require("https");
const fs = require("fs");
const path = require("path");
const os = require("os");
const crypto = require("crypto");
const { URL } = require("url");
const { app, safeStorage } = require("electron");
const translate = require("./translate");
const mediaUnderstanding = require("./media-understanding");

let CODEX_HOME = path.join(os.homedir(), ".codex");
const CLAUDE_HOME = path.join(os.homedir(), ".claude");
const PROVIDER_ID = "local-router"; // config.toml 里的 provider 名（走本地路由进程时用）
const DIRECT_PROVIDER_ID = "td-direct"; // config.toml 里的 provider 名（直连中转、不经路由时用）

function setCodexDataDir(dir) {
  if (typeof dir !== "string" || !dir.trim()) return;
  CODEX_HOME = path.resolve(dir);
}

function cfgPath() {
  return path.join(app.getPath("userData"), "router.json");
}

const RETRYABLE_WRITE_CODES = new Set(["EACCES", "EBUSY", "EEXIST", "ENOTEMPTY", "EPERM"]);

function sleepSync(ms) {
  if (!ms) return;
  Atomics.wait(new Int32Array(new SharedArrayBuffer(4)), 0, 0, ms);
}

function retryWriteOperation(fn) {
  const delays = [0, 10, 25, 50, 100, 200];
  let lastError;
  for (const delay of delays) {
    if (delay) sleepSync(delay);
    try {
      return fn();
    } catch (e) {
      lastError = e;
      if (!RETRYABLE_WRITE_CODES.has(e && e.code)) throw e;
    }
  }
  throw lastError;
}

// Windows 上 Codex/安全软件可能短暂占用配置文件。先同目录原子替换，失败时重试，
// 再退化为带重试的直接覆盖；最终回读校验，绝不把写入失败伪装成切换成功。
function safeWriteFileSync(file, content, encoding) {
  fs.mkdirSync(path.dirname(file), { recursive: true });
  const data = Buffer.isBuffer(content) ? content : Buffer.from(String(content), encoding || "utf-8");
  const tmp = `${file}.${process.pid}.${Date.now()}.${crypto.randomBytes(4).toString("hex")}.tmp`;
  const before = readFileState(file);
  let targetMayHaveChanged = false;
  try {
    retryWriteOperation(() => fs.writeFileSync(tmp, data));
    try {
      retryWriteOperation(() => fs.renameSync(tmp, file));
      targetMayHaveChanged = true;
    } catch (renameError) {
      if (!RETRYABLE_WRITE_CODES.has(renameError && renameError.code)) throw renameError;
      targetMayHaveChanged = true;
      retryWriteOperation(() => fs.writeFileSync(file, data));
    }
    const actual = retryWriteOperation(() => fs.readFileSync(file));
    if (!actual.equals(data)) {
      const error = new Error(`写入后校验失败：${file}`);
      error.code = "EVERIFY";
      throw error;
    }
  } catch (e) {
    let rollbackError = null;
    if (targetMayHaveChanged) {
      try {
        if (before.exists) retryWriteOperation(() => fs.writeFileSync(file, before.data));
        else retryWriteOperation(() => fs.rmSync(file, { force: true }));
      } catch (restoreError) {
        rollbackError = restoreError;
      }
    }
    const detail = e && e.code ? `${e.code}: ${e.message}` : String((e && e.message) || e);
    const rollbackDetail = rollbackError
      ? `；原内容恢复失败：${rollbackError.code || "ERROR"}: ${rollbackError.message}`
      : "";
    throw new Error(`无法写入配置文件 ${file}（${detail}）${rollbackDetail}`);
  } finally {
    try { fs.rmSync(tmp, { force: true }); } catch {}
  }
}

function readFileState(file) {
  try {
    return { exists: true, data: retryWriteOperation(() => fs.readFileSync(file)) };
  } catch (e) {
    if (e && e.code === "ENOENT") return { exists: false, data: null };
    throw e;
  }
}

function restoreFileState(file, state) {
  if (state.exists) {
    safeWriteFileSync(file, state.data);
    return;
  }
  retryWriteOperation(() => fs.rmSync(file, { force: true }));
}

function writeCodexConfigPair(configText, authText) {
  const configFile = path.join(CODEX_HOME, "config.toml");
  const authFile = path.join(CODEX_HOME, "auth.json");
  const beforeConfig = readFileState(configFile);
  const beforeAuth = readFileState(authFile);
  try {
    safeWriteFileSync(configFile, configText, "utf-8");
    safeWriteFileSync(authFile, authText, "utf-8");
    try { fs.chmodSync(authFile, 0o600); } catch {}
  } catch (writeError) {
    const rollbackErrors = [];
    try { restoreFileState(configFile, beforeConfig); } catch (e) { rollbackErrors.push(`config.toml: ${(e && e.message) || e}`); }
    try { restoreFileState(authFile, beforeAuth); } catch (e) { rollbackErrors.push(`auth.json: ${(e && e.message) || e}`); }
    if (rollbackErrors.length) {
      throw new Error(`${writeError.message}；回滚失败：${rollbackErrors.join("；")}`);
    }
    throw writeError;
  }
}

function readJsonForUpdate(file) {
  const text = readTextForUpdate(file);
  if (!text.trim()) return {};
  try {
    const value = JSON.parse(text);
    return value && typeof value === "object" && !Array.isArray(value) ? value : {};
  } catch (e) {
    throw new Error(`配置文件 JSON 解析失败 ${file}：${e.message}`);
  }
}

function readTextForUpdate(file) {
  try {
    return retryWriteOperation(() => fs.readFileSync(file, "utf-8"));
  } catch (e) {
    if (e && e.code === "ENOENT") return "";
    throw e;
  }
}

// —— 加解密（复用 safeStorage）——
function enc(s) {
  if (!s) return "";
  try {
    if (safeStorage.isEncryptionAvailable()) return "v1:" + safeStorage.encryptString(s).toString("base64");
  } catch {}
  return "b64:" + Buffer.from(s, "utf-8").toString("base64");
}
function dec(s) {
  if (!s) return "";
  try {
    if (s.startsWith("v1:")) return safeStorage.decryptString(Buffer.from(s.slice(3), "base64"));
    if (s.startsWith("b64:")) return Buffer.from(s.slice(4), "base64").toString("utf-8");
  } catch {}
  return "";
}

// —— 配置持久化 —— config: { port, routerKey, activeId, activeClaudeId, groups:[{id,name,baseUrl,key,model}] }
// 两个激活槽，按协议族各留一个，让 Codex/GPT 与 Claude Code 能同时激活、互不顶替：
//   activeId       —— OpenAI 协议族（Codex/GPT：mode = responses / chat，含默认分组）
//   activeClaudeId —— Anthropic 协议族（Claude Code：mode = claude）
let config = null;

function defaultConfig() {
  return { port: 8787, routerKey: "rk-" + crypto.randomBytes(16).toString("hex"), activeId: null, activeClaudeId: null, groups: [] };
}

// 分组所属协议族：claude 模式 = Anthropic 族，其余（responses/chat/默认）= OpenAI 族
function isClaudeGroup(g) { return !!g && g.mode === "claude"; }
// 工具/插件专用分组：只给画布、技能或插件显式调用，不参与 Codex/GPT 默认分组选择。
function isToolOnlyGroup(g) { return !!g && !g.isDefault && (g.codexImage || g.codexVideo || g.stt); }
function load() {
  if (config) return config;
  try {
    const raw = JSON.parse(fs.readFileSync(cfgPath(), "utf-8"));
    raw.routerKey = raw.routerKey ? dec(raw.routerKey) : defaultConfig().routerKey;
    raw.groups = (raw.groups || []).map((g) => {
      const out = { ...g, key: dec(g.key) };
      // officialBackup.authJson 含 OAuth tokens，落盘时加密，读时解密
      if (out.officialBackup && out.officialBackup.authJson) {
        out.officialBackup = { ...out.officialBackup, authJson: dec(out.officialBackup.authJson) };
      }
      return out;
    });
    config = { ...defaultConfig(), ...raw };
  } catch {
    config = defaultConfig();
  }
  ensureDefault();
  migrateActiveSlots();
  return config;
}

// 老配置只有单一 activeId：若它指向的是 claude 分组，迁移到 activeClaudeId，
// 并为空出来的 OpenAI 槽自动选一个非 claude 分组，保证两族各有默认激活。
function migrateActiveSlots() {
  if (!("activeClaudeId" in config)) config.activeClaudeId = null;
  const act = config.groups.find((g) => g.id === config.activeId);
  if (act && isClaudeGroup(act)) {
    if (!config.activeClaudeId) config.activeClaudeId = act.id;
    // 优先选真正的中转分组（非默认、非 claude）；没有再退到默认分组
    const proxy = config.groups.find((g) => !isClaudeGroup(g) && !g.isDefault && !isToolOnlyGroup(g));
    const fallback = config.groups.find((g) => !isClaudeGroup(g));
    config.activeId = (proxy || fallback || {}).id || null;
  }
  const activeOpenAI = config.groups.find((g) => g.id === config.activeId);
  if (isToolOnlyGroup(activeOpenAI)) {
    const proxy = config.groups.find((g) => !isClaudeGroup(g) && !g.isDefault && !isToolOnlyGroup(g));
    const fallback = config.groups.find((g) => !isClaudeGroup(g) && !isToolOnlyGroup(g));
    config.activeId = (proxy || fallback || {}).id || null;
    save();
  }
  const activeClaude = config.groups.find((g) => g.id === config.activeClaudeId);
  if (isToolOnlyGroup(activeClaude)) {
    const cg = config.groups.find((g) => isClaudeGroup(g) && !isToolOnlyGroup(g));
    config.activeClaudeId = cg ? cg.id : null;
    save();
  }
  // 补齐 claude 槽：若从未设过，且存在 claude 分组，默认选第一个
  if (!config.activeClaudeId) {
    const cg = config.groups.find((g) => isClaudeGroup(g));
    if (cg) config.activeClaudeId = cg.id;
  }
}
function save() {
  const out = {
    ...config,
    routerKey: enc(config.routerKey),
    groups: config.groups.map((g) => {
      const o = { ...g, key: enc(g.key) };
      if (o.officialBackup && o.officialBackup.authJson) {
        o.officialBackup = { ...o.officialBackup, authJson: enc(o.officialBackup.authJson) };
      }
      return o;
    }),
  };
  const p = cfgPath();
  safeWriteFileSync(p, JSON.stringify(out, null, 2), "utf-8");
  try {
    fs.chmodSync(p, 0o600);
  } catch {}
}

// 取激活分组。wantClaude=true 取 Anthropic 族（activeClaudeId），否则取 OpenAI 族（activeId）。
function activeGroup(wantClaude) {
  load();
  const id = wantClaude ? config.activeClaudeId : config.activeId;
  return config.groups.find((g) => g.id === id) || null;
}

function requestModel(body) {
  try {
    const parsed = JSON.parse(Buffer.isBuffer(body) ? body.toString("utf-8") : String(body || ""));
    return String(parsed && parsed.model || "").trim();
  } catch {
    return "";
  }
}

function requestRouteHintModel(body) {
  let parsed;
  try {
    parsed = JSON.parse(Buffer.isBuffer(body) ? body.toString("utf-8") : String(body || ""));
  } catch {
    return "";
  }
  const seen = new Set();
  const texts = [];
  const walk = (value) => {
    if (value == null) return;
    if (typeof value === "string") {
      texts.push(value);
      return;
    }
    if (typeof value !== "object" || seen.has(value)) return;
    seen.add(value);
    if (Array.isArray(value)) {
      value.forEach(walk);
      return;
    }
    for (const key of ["instructions", "text", "content", "input", "output", "arguments", "prompt"]) {
      walk(value[key]);
    }
  };
  walk(parsed);
  const text = texts.join("\n");
  const m = text.match(/TD_MODEL_ROUTE\s+model=["']?([^"'\]\s;]+)/i);
  return m ? String(m[1] || "").trim() : "";
}

function rewriteRequestModel(body, model) {
  const target = String(model || "").trim();
  if (!target || !body.length) return body;
  let j;
  try {
    j = JSON.parse(body.toString("utf-8"));
  } catch {
    return body;
  }
  if (!j || typeof j !== "object" || Array.isArray(j) || j.model === target) return body;
  j.model = target;
  return Buffer.from(JSON.stringify(j), "utf-8");
}

// 返回 { group, byModel }：显式模型命中 routeModels 时不受 activeId 影响。
// routeModels 由员工团队生成时登记，避免用户切换激活分组后子 Agent 跑错上游。
function requestGroup(wantClaude, body) {
  const active = activeGroup(wantClaude);
  if (wantClaude) return { group: active, byModel: false };
  load();
  const candidates = config.groups.filter((g) =>
    !g.isDefault && !isClaudeGroup(g) && !isToolOnlyGroup(g) && g.baseUrl && g.key
  );

  // 只有带明确路由提示的团队/子 Agent 请求才按模型覆盖 activeId。
  // 普通 Codex 请求如果仍然带着旧的模型名（例如顶部选择器未刷新，还停留在
  // kimi-k3），绝不能因为 exact/routeModels 命中而把用户刚选的 activeId 拽回去。
  const hintModel = requestRouteHintModel(body);
  if (hintModel) {
    const explicit = candidates.find((g) => Array.isArray(g.routeModels) && g.routeModels.includes(hintModel));
    if (explicit) return { group: explicit, byModel: true, routeModel: hintModel };
    const exact = candidates.find((g) => g.model && String(g.model) === hintModel);
    if (exact) return { group: exact, byModel: true, routeModel: hintModel };
  }

  const model = requestModel(body);
  if (!model) return { group: active, byModel: false };
  const explicit = candidates.find((g) => Array.isArray(g.routeModels) && g.routeModels.includes(model));
  if (explicit) return { group: explicit, byModel: true, routeModel: model };
  return { group: active, byModel: false };
}

// 判断一个进来的请求是否是 Anthropic 协议（Claude Code）：走 /v1/messages，或带 anthropic 头。
function reqIsAnthropic(req) {
  const h = req.headers || {};
  return /\/v1\/messages/.test(req.url || "") || "anthropic-version" in h || "x-api-key" in h;
}

// —— 默认分组：客户原本的 Codex 配置（自己账号，直连）——
function readConfigToml() {
  try {
    return fs.readFileSync(path.join(CODEX_HOME, "config.toml"), "utf-8");
  } catch {
    return "";
  }
}
function currentModelProvider() {
  const head = readConfigToml().split("\n[")[0];
  const m = head.match(/^\s*model_provider\s*=\s*["']([^"']+)/m);
  return m ? m[1] : "";
}
function modelProviderFromText(text) {
  const head = String(text || "").split("\n[")[0];
  const m = head.match(/^\s*model_provider\s*=\s*["']([^"']+)/m);
  return m ? m[1] : "";
}
// 读根级 model（新版桌面 Codex 登录态通常没有；用于复原时精确还原/清除中转写入的 model）
function currentRootModel() {
  const head = readConfigToml().split("\n[")[0];
  const m = head.match(/^\s*model\s*=\s*["']([^"']+)/m);
  return m ? m[1] : "";
}
function extractProviderBlock(text, prov) {
  const esc = prov.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
  const re = new RegExp(`\\[model_providers\\.${esc}\\][\\s\\S]*?(?=\\n\\[|$)`, "m");
  const m = text.match(re);
  return m ? m[0].trimEnd() + "\n" : "";
}
function readAuthKey() {
  try {
    return JSON.parse(fs.readFileSync(path.join(CODEX_HOME, "auth.json"), "utf-8")).OPENAI_API_KEY || "";
  } catch {
    return "";
  }
}
function maskSecret(s) {
  if (!s) return "";
  if (s.length <= 10) return "****";
  return s.slice(0, 6) + "..." + s.slice(-4);
}
function authSummaryFromText(text) {
  if (!text) return { exists: false, loginMode: "未检测到凭证", hasOpenAIKey: false, keyPreview: "", hasTokens: false };
  try {
    const a = JSON.parse(text);
    const key = a.OPENAI_API_KEY || "";
    const tokens = a.tokens || {};
    const hasTokens = !!(tokens.access_token || tokens.id_token || tokens.refresh_token);
    return {
      exists: true,
      loginMode: hasTokens ? "ChatGPT OAuth 登录" : (key ? "API Key" : "未检测到凭证"),
      hasOpenAIKey: !!key,
      keyPreview: maskSecret(key),
      hasTokens,
    };
  } catch {
    return { exists: true, loginMode: "auth.json 解析失败", hasOpenAIKey: false, keyPreview: "", hasTokens: false };
  }
}
function readAuthSummary() {
  try {
    return authSummaryFromText(fs.readFileSync(path.join(CODEX_HOME, "auth.json"), "utf-8"));
  } catch {
    return authSummaryFromText("");
  }
}
// 是否已用自己账号登录 Codex（ChatGPT OAuth）——凭证是 auth.json 的 tokens，而非 API key。
// 这是「我的账号 · 直连」的真实判据：只要 tokens 在，切中转只是覆盖 OPENAI_API_KEY，登录不会丢。
function isLoggedIn() {
  try {
    const a = JSON.parse(fs.readFileSync(path.join(CODEX_HOME, "auth.json"), "utf-8"));
    return !!(a && a.tokens && (a.tokens.access_token || a.tokens.id_token || a.tokens.refresh_token));
  } catch {
    return false;
  }
}
// 从 TOML 文本里删除某个 section（从 [header] 行删到下一个 [ 行之前），按行处理最稳
function removeTomlSection(text, header) {
  const lines = text.split("\n");
  const out = [];
  let skip = false;
  for (const line of lines) {
    const t = line.trim();
    if (t === `[${header}]`) {
      skip = true;
      continue;
    }
    if (skip && t.startsWith("[") && t.endsWith("]")) skip = false; // 遇到下一个 section，停止跳过
    if (!skip) out.push(line);
  }
  return out.join("\n").replace(/\n{3,}/g, "\n\n");
}
function isManagedProviderId(id) {
  return id === PROVIDER_ID || id === DIRECT_PROVIDER_ID;
}
function configLooksManaged(text) {
  const s = String(text || "");
  if (!s.trim()) return false;
  if (isManagedProviderId(modelProviderFromText(s))) return true;
  return s.includes(`[model_providers.${PROVIDER_ID}]`) || s.includes(`[model_providers.${DIRECT_PROVIDER_ID}]`);
}

// 当前 Codex 是否仍保留“本地路由”接管痕迹。这个状态只用于页面显示和取消按钮，
// 不把直连中转（td-direct）误显示成已启用本地路由。
function codexRouteApplied() {
  const text = readConfigToml();
  if (modelProviderFromText(text) === PROVIDER_ID) return true;
  if (extractProviderBlock(text, PROVIDER_ID)) return true;
  try {
    const auth = JSON.parse(readTextIfExists(path.join(CODEX_HOME, "auth.json")) || "{}");
    return auth.OPENAI_API_KEY === config.routerKey;
  } catch {
    return false;
  }
}
function cleanOfficialConfigToml(text) {
  let out = String(text || "");
  out = removeTomlSection(out, `model_providers.${PROVIDER_ID}`);
  out = removeTomlSection(out, `model_providers.${DIRECT_PROVIDER_ID}`);
  out = out.replace(/^\s*model_provider\s*=.*$\n?/m, "");
  out = out.replace(/^\s*model\s*=.*$\n?/m, "");
  return out.replace(/\n{3,}/g, "\n\n").trimEnd() + (out.trim() ? "\n" : "");
}
function authLooksManaged(text) {
  try {
    const auth = JSON.parse(text || "{}");
    const key = auth.OPENAI_API_KEY || "";
    return !!(key && (key === config.routerKey || /^rk-[a-z0-9-]+/i.test(key) || config.groups.some((g) => !g.isDefault && g.key === key)));
  } catch {
    return false;
  }
}
function cleanOfficialAuthJson(text) {
  let auth = {};
  try { auth = JSON.parse(text || "{}"); } catch {}
  const tokens = auth.tokens || {};
  const hasTokens = !!(tokens.access_token || tokens.id_token || tokens.refresh_token);
  if (hasTokens || authLooksManaged(text)) delete auth.OPENAI_API_KEY;
  return JSON.stringify(auth, null, 2);
}
function readTextIfExists(file) {
  try { return fs.readFileSync(file, "utf-8"); } catch { return ""; }
}
function routerConfigBackups() {
  const dir = path.join(CODEX_HOME, "backups_state", "router");
  let names = [];
  try { names = fs.readdirSync(dir); } catch { return []; }
  return names
    .filter((n) => /^config\.toml\.\d+\.bak$/.test(n))
    .sort((a, b) => {
      const ta = Number((a.match(/\.(\d+)\.bak$/) || [])[1] || 0);
      const tb = Number((b.match(/\.(\d+)\.bak$/) || [])[1] || 0);
      return ta - tb;
    })
    .map((n) => readTextIfExists(path.join(dir, n)))
    .filter(Boolean);
}
function bestOfficialConfigToml(...preferred) {
  const officialDir = path.join(CODEX_HOME, "backups_state", "router", "official-login");
  const candidates = [
    readTextIfExists(path.join(officialDir, "config.toml.clean")),
    readTextIfExists(path.join(officialDir, "config.toml.orig")),
    ...routerConfigBackups(),
    ...preferred,
  ].filter((s) => s && s.trim());
  const clean = candidates.find((s) => !configLooksManaged(s));
  if (clean) return clean.replace(/\n{3,}/g, "\n\n").trimEnd() + "\n";
  return cleanOfficialConfigToml(candidates[0] || "");
}
function bestOfficialAuthJson(...preferred) {
  const officialDir = path.join(CODEX_HOME, "backups_state", "router", "official-login");
  const candidates = [
    readTextIfExists(path.join(officialDir, "auth.json.clean")),
    readTextIfExists(path.join(officialDir, "auth.json.orig")),
    ...preferred,
  ].filter((s) => s && s.trim());
  const clean = candidates.find((s) => !authLooksManaged(s));
  return cleanOfficialAuthJson(clean || candidates[0] || "{}");
}

function backupConfig(text) {
  try {
    const dir = path.join(CODEX_HOME, "backups_state", "router");
    fs.mkdirSync(dir, { recursive: true });
    fs.writeFileSync(path.join(dir, "config.toml." + Date.now() + ".bak"), text || "");
  } catch {}
}
// 首次接管 Codex 配置前，把官方登录信息（含 OAuth tokens 的 auth.json + 当前 config.toml）
// 完整快照进默认分组 def.officialBackup，并落一份磁盘副本。幂等：只在第一次真正执行。
// 保证任何时候「切回默认」都能 100% 还原回官方登录态。
function snapshotOfficialLogin(def) {
  if (!def) return false;
  let configToml = "";
  let authJson = "";
  try { configToml = fs.readFileSync(path.join(CODEX_HOME, "config.toml"), "utf-8"); } catch {}
  try { authJson = fs.readFileSync(path.join(CODEX_HOME, "auth.json"), "utf-8"); } catch {}
  const backup = def.officialBackup || {};
  const backupAuth = backup.authJson || "";
  const hasTokens = isLoggedIn() || !!authSummaryFromText(backupAuth).hasTokens || !!authSummaryFromText(authJson).hasTokens;
  const polluted = configLooksManaged(backup.configToml || "") || authLooksManaged(backup.authJson || "")
    || isManagedProviderId(def.modelProvider);
  if (backup.done && !hasTokens && !polluted) return false; // 纯 API key 老用户且快照干净：沿用原始快照。
  if (hasTokens || polluted) {
    const cleanConfigToml = bestOfficialConfigToml(backup.configToml || "", configToml);
    const cleanAuthJson = bestOfficialAuthJson(backup.authJson || "", authJson);
    const changed = !backup.done
      || backup.configToml !== cleanConfigToml
      || backup.authJson !== cleanAuthJson
      || def.modelProvider
      || def.providerBlock
      || def.authKey
      || def.origModel;
    const cleanProvider = modelProviderFromText(cleanConfigToml);
    def.modelProvider = cleanProvider && !isManagedProviderId(cleanProvider) ? cleanProvider : "";
    def.providerBlock = def.modelProvider ? extractProviderBlock(cleanConfigToml, def.modelProvider) : "";
    def.authKey = "";
    def.origModel = "";
    def.officialBackup = {
      done: true,
      ts: backup.ts || Date.now(),
      repairedTs: changed ? Date.now() : backup.repairedTs,
      configToml: cleanConfigToml,
      authJson: cleanAuthJson,
      hadTokens: hasTokens,
    };
    try {
      const dir = path.join(CODEX_HOME, "backups_state", "router", "official-login");
      fs.mkdirSync(dir, { recursive: true });
      fs.writeFileSync(path.join(dir, "config.toml.clean"), cleanConfigToml, "utf-8");
      fs.writeFileSync(path.join(dir, "auth.json.clean"), cleanAuthJson, "utf-8");
      try { fs.chmodSync(path.join(dir, "auth.json.clean"), 0o600); } catch {}
    } catch {}
    return !!changed;
  }
  if (backup.done) return false; // 幂等守卫
  // 磁盘副本（灾备）：仅当不存在时写，避免二次接管覆盖原始官方备份
  try {
    const dir = path.join(CODEX_HOME, "backups_state", "router", "official-login");
    fs.mkdirSync(dir, { recursive: true });
    const cfgOrig = path.join(dir, "config.toml.orig");
    const authOrig = path.join(dir, "auth.json.orig");
    if (configToml && !fs.existsSync(cfgOrig)) fs.writeFileSync(cfgOrig, configToml, "utf-8");
    if (authJson && !fs.existsSync(authOrig)) {
      fs.writeFileSync(authOrig, authJson, "utf-8");
      try { fs.chmodSync(authOrig, 0o600); } catch {}
    }
  } catch {}
  def.officialBackup = {
    done: true,
    ts: Date.now(),
    configToml,
    authJson,
    hadTokens: isLoggedIn(),
  };
  return true;
}
// 首次使用时，把当前(原始)Codex 配置快照为不可删除的「默认」分组。
// 铁律：默认分组必须代表「我的账号 · 直连」的登录态，绝不能是接入中转的状态，
// 否则「切回默认」会把 Codex 重新指向中转，用户就再也复原不回自己账号了。
function ensureDefault() {
  if (!config) return;
  const loggedIn = isLoggedIn();
  const existing = config.groups.find((g) => g.isDefault);
  if (existing) {
    let changed = snapshotOfficialLogin(existing); // 幂等：确保已装用户也补上官方登录完整备份，并修复历史污染快照
    // 自愈：已用自己账号登录，但历史版本把默认分组错误地快照成了中转 provider →
    // 纠正为「纯登录态」，保证「切回默认」永远能干净复原自己账号。
    if (loggedIn && (existing.modelProvider || existing.providerBlock || existing.authKey)) {
      existing.modelProvider = "";
      existing.providerBlock = "";
      existing.authKey = "";
      existing.origModel = "";
      changed = true;
    }
    if (changed) save();
    return;
  }
  if (loggedIn) {
    // 已登录自己账号：默认分组 = Codex 原生登录直连（不覆盖 model_provider、无 API key、
    // 保留 auth.json 的 tokens）。无论此刻 config.toml 指向哪个中转，都能干净复原。
    config.groups.unshift({
      id: "default",
      isDefault: true,
      name: "默认（我的账号 · 直连）",
      modelProvider: "",
      providerBlock: "",
      authKey: "",
      origModel: currentRootModel(), // 记住原始根级 model（新版桌面登录态通常无 → ""），复原时精确还原
    });
    snapshotOfficialLogin(config.groups[0]);
    if (!config.activeId) config.activeId = "default";
    save();
    return;
  }
  // 未用 OAuth 登录（纯 API key 用户，无 tokens 可保护）：沿用原逻辑，快照当前直连 provider。
  const prov = currentModelProvider();
  if (!prov || isManagedProviderId(prov)) return; // 已是本软件接管 / 无配置 → 不快照
  const text = readConfigToml();
  config.groups.unshift({
    id: "default",
    isDefault: true,
    name: "默认（我的账号 · 直连）",
    modelProvider: prov,
    providerBlock: extractProviderBlock(text, prov),
    authKey: readAuthKey(),
    origModel: currentRootModel(),
  });
  snapshotOfficialLogin(config.groups[0]);
  if (!config.activeId) config.activeId = "default";
  save();
}
// 模型目录路径（config.toml 的 model_catalog_json，默认 cc-switch-model-catalog.json）
function catalogPath() {
  const m = readConfigToml().match(/model_catalog_json\s*=\s*["']([^"']+)/);
  const name = m ? m[1] : "cc-switch-model-catalog.json";
  return path.isAbsolute(name) ? name : path.join(CODEX_HOME, name);
}

// 国产模型的实际可用窗口通常小于 Codex 模板模型。分组未填写时给出保守值，
// 让 Codex 在上游拒绝请求前预留足够空间完成自动压缩。用户填写的值始终优先
// （≥1024 即生效；过小的值多半也是有意为之，比如想强制尽早压缩）。
function effectiveContextWindow(group, fallback = 0) {
  const configured = parseInt(group && group.contextWindow, 10);
  if (configured >= 1024) return configured;
  const hint = `${group && group.model || ""} ${group && group.name || ""}`.toLowerCase();
  if (/deepseek/.test(hint)) return 65536;
  if (/kimi/.test(hint)) return 131072;
  return fallback;
}

function setCompactionHeadroom(model, window) {
  // Desktop starts its own compaction from this ratio.  The 95% inherited from
  // GPT templates leaves too little room for the compaction prompt on 64K/128K
  // third-party models, so the request can hit the provider limit first.
  if (!model || !window) return;
  model.effective_context_window_percent = Math.min(
    Number(model.effective_context_window_percent) || 95,
    80
  );
}
// Codex 只有在 config.toml 显式写了 model_catalog_json 时才会读本地模型目录；不写这行，
// 本工具登记的 context_window / 压缩阈值全部无效，Codex 会把未知模型按默认 GPT 模板
// （272000×95%≈258K）处理 → 深度求索/Kimi 真实窗口远小于此 → 永远等不到自动压缩。
// 另外该路径按进程 CWD 解析（桌面端 CWD 不固定），必须写绝对路径。
// 已指向其它目录文件时尊重用户配置不动；目录文件不存在/为空时跳过，避免 Codex 启动报错。
function ensureCatalogLinked(text) {
  const abs = catalogPath();
  try {
    const cat = JSON.parse(fs.readFileSync(abs, "utf-8"));
    if (!cat || !Array.isArray(cat.models) || !cat.models.length) return text;
  } catch {
    return text;
  }
  const m = String(text || "").match(/^\s*model_catalog_json\s*=\s*["']([^"']+)["']/m);
  if (m) {
    const existing = m[1];
    const resolved = path.isAbsolute(existing) ? existing : path.join(CODEX_HOME, existing);
    if (resolved !== abs) return text; // 用户指向了自己的目录文件，尊重
    if (path.isAbsolute(existing)) return text; // 已是绝对路径且指向同一文件
    return text.replace(/^\s*model_catalog_json\s*=.*$/m, `model_catalog_json = "${abs}"`);
  }
  return `model_catalog_json = "${abs}"\n${text}`;
}

// 把分组的模型 + 上下文窗口写进 Codex 模型目录，让 Codex 按真实窗口自动压缩
// 铁律：只要分组指定了 model，就必须保证它在目录里存在（visibility=list）。
// 否则 config.toml 的根级 model 指向一个「目录里没有的模型」，Codex 会以未知模型启动、
// 无法解析出该模型 → 侧栏历史线程还原失败 = 用户看到「切模型后会话记录消失」。
// contextWindow 只是「可选的窗口覆盖」，绝不能作为「是否登记进目录」的前置条件。
function applyModelCatalog(group) {
  if (!group || group.isDefault || !group.model) return; // 不再要求 contextWindow
  const p = catalogPath();
  let cat;
  try {
    cat = JSON.parse(fs.readFileSync(p, "utf-8"));
  } catch {
    return; // 无目录文件就不动
  }
  if (!cat.models || !cat.models.length) return;
  const win = effectiveContextWindow(group); // 未填时为 DeepSeek/Kimi 使用保守窗口
  const existing = cat.models.find((m) => m.slug === group.model);
  if (existing) {
    if (win) {
      existing.context_window = win;
      existing.max_context_window = win;
      setCompactionHeadroom(existing, win);
    }
    existing.visibility = "list"; // 已在目录：无论有无窗口，都确保可见
  } else {
    const tpl = JSON.parse(JSON.stringify(cat.models[0])); // 克隆模板(含 base_instructions 等必需字段)
    // 未指定窗口时，用模板自带窗口兜底（再退到 128000），保证新模型有合法窗口
    const w = win || parseInt(tpl.context_window, 10) || 128000;
    tpl.slug = group.model;
    tpl.display_name = group.model;
    tpl.description = group.model;
    tpl.context_window = w;
    tpl.max_context_window = w;
    setCompactionHeadroom(tpl, w);
    tpl.priority = 900;
    tpl.visibility = "list";
    cat.models.push(tpl);
  }
  try {
    fs.writeFileSync(p + ".bak-router", fs.readFileSync(p));
  } catch {}
  safeWriteFileSync(p, JSON.stringify(cat, null, 2), "utf-8");
}
// 【根治「切模型丢会话」】把分组中转站 /models 返回的全部文本模型，先登记进 Codex 模型目录。
// 关键：用户是在 Codex 本体的模型选择器里切模型的，那条路径不经过本 App，App 的 applyModelCatalog
// 不会触发；若目标 slug 不在目录里，Codex 会以未知模型启动、侧栏历史还原失败 = 会话"消失"。
// 因此必须【先回填】：把该中转能用的模型全部登记为 visibility=list，用户在 Codex 里选哪个都不丢。
// 非文本模型（画图/审阅/语音等）不是对话模型，排除；任何网络/解析失败都不动既有目录（离线安全）。
const NON_TEXT_MODEL_RE = /(image|imagine|whisper|audio|voice|tts|stt|embed|rerank|review|moderation|vision-ocr)/i;
async function syncCatalogFromProvider(group) {
  try {
    if (!group || group.isDefault || !group.baseUrl || !group.key) return { ok: false, skipped: true };
    if (group.mode === "claude") return { ok: false, skipped: true }; // Claude 族不写 Codex 目录
    let ids = [];
    try {
      ids = await fetchModels(group.baseUrl, group.key); // 复用既有 /v1/models · /models 探测
    } catch (e) {
      return { ok: false, error: (e && e.message) || String(e) }; // 网络/接口失败 → 不动既有目录
    }
    const textIds = ids.filter((s) => !NON_TEXT_MODEL_RE.test(s));
    if (!textIds.length) return { ok: false, error: "无可登记的文本模型" };
    const p = catalogPath();
    let cat;
    try {
      cat = JSON.parse(fs.readFileSync(p, "utf-8"));
    } catch {
      return { ok: false, error: "无模型目录文件" };
    }
    if (!cat.models || !cat.models.length) return { ok: false, error: "模型目录为空" };
    const tpl0 = cat.models[0];
    const w0 = parseInt(tpl0.context_window, 10) || 128000;
    // 回填窗口用分组的真实窗口（用户填写 > 国产模型保守值 > 模板窗口），并统一压缩阈值；
    // 否则回填模型继承 GPT 模板的 272000×95%≈258K，Codex 永远等不到自动压缩。
    const win = effectiveContextWindow(group, w0);
    let added = 0;
    let revealed = 0;
    let refreshed = 0;
    for (const slug of textIds) {
      const ex = cat.models.find((m) => m.slug === slug);
      if (ex) {
        if (ex.visibility !== "list") { ex.visibility = "list"; revealed++; }
        if (win && (ex.context_window !== win || ex.max_context_window !== win)) {
          ex.context_window = win;
          ex.max_context_window = win;
          refreshed++;
        }
        setCompactionHeadroom(ex, win);
        continue;
      }
      const t = JSON.parse(JSON.stringify(tpl0)); // 克隆模板(含 base_instructions 等必需字段)
      t.slug = slug;
      t.display_name = slug;
      t.description = slug;
      t.context_window = win;
      t.max_context_window = win;
      setCompactionHeadroom(t, win);
      t.priority = 900;
      t.visibility = "list";
      cat.models.push(t);
      added++;
    }
    if (added || revealed || refreshed) {
      try { fs.writeFileSync(p + ".bak-router", fs.readFileSync(p)); } catch {}
      safeWriteFileSync(p, JSON.stringify(cat, null, 2), "utf-8");
    }
    return { ok: true, added, revealed, refreshed, total: textIds.length };
  } catch (e) {
    return { ok: false, error: (e && e.message) || String(e) };
  }
}
// 兜底：确保某个裸 model slug 一定在目录里（visibility=list）。用于 setConfigModel 前的自愈，
// 覆盖「config.toml 指向的模型没有对应分组（手改/历史残骸）」这种也会导致侧栏历史还原失败的情况。
function ensureModelInCatalog(model) {
  if (!model) return;
  const p = catalogPath();
  let cat;
  try {
    cat = JSON.parse(fs.readFileSync(p, "utf-8"));
  } catch {
    return; // 无目录文件就不动
  }
  if (!cat.models || !cat.models.length) return;
  const existing = cat.models.find((m) => m.slug === model);
  if (existing) {
    if (existing.visibility !== "list") {
      existing.visibility = "list";
      try { fs.writeFileSync(p + ".bak-router", fs.readFileSync(p)); } catch {}
      safeWriteFileSync(p, JSON.stringify(cat, null, 2), "utf-8");
    }
    return;
  }
  const tpl = JSON.parse(JSON.stringify(cat.models[0]));
  const w = parseInt(tpl.context_window, 10) || 128000;
  tpl.slug = model;
  tpl.display_name = model;
  tpl.description = model;
  tpl.context_window = w;
  tpl.max_context_window = w;
  tpl.priority = 900;
  tpl.visibility = "list";
  cat.models.push(tpl);
  try { fs.writeFileSync(p + ".bak-router", fs.readFileSync(p)); } catch {}
  safeWriteFileSync(p, JSON.stringify(cat, null, 2), "utf-8");
}
// 把 config.toml 根级 model 设成指定值（写入前先确保该模型已在目录里，避免 Codex 以未知模型启动）
function setConfigModel(model) {
  if (!model) return;
  ensureModelInCatalog(model);
  const cfgFile = path.join(CODEX_HOME, "config.toml");
  let text = readTextForUpdate(cfgFile);
  text = setRootModelInText(text, model);
  text = ensureCatalogLinked(text);
  safeWriteFileSync(cfgFile, text, "utf-8");
}

function setRootModelInText(text, model) {
  if (!model) return text;
  if (/^\s*model\s*=/m.test(text)) return text.replace(/^\s*model\s*=.*$/m, `model = "${model}"`);
  if (/^\s*model_provider\s*=/m.test(text)) {
    return text.replace(/^(\s*model_provider\s*=.*)$/m, `$1\nmodel = "${model}"`);
  }
  return `model = "${model}"\n${text}`;
}

// 恢复到默认（把 config.toml/auth.json 还原成客户原始配置，Codex 直连自己账号）
function restoreDirect() {
  const def = config.groups.find((g) => g.isDefault);
  if (!def) {
    // 没有默认分组时也必须清理本工具的接管痕迹，不能让“取消路由”变成空操作。
    const cfgFile = path.join(CODEX_HOME, "config.toml");
    const before = readTextForUpdate(cfgFile);
    backupConfig(before);
    const text = cleanOfficialConfigToml(before);
    const authFile = path.join(CODEX_HOME, "auth.json");
    const authText = cleanOfficialAuthJson(readTextForUpdate(authFile));
    writeCodexConfigPair(text, authText);
    return;
  }
  if (snapshotOfficialLogin(def)) save();
  const cfgFile = path.join(CODEX_HOME, "config.toml");
  let text = readTextForUpdate(cfgFile);
  backupConfig(text);
  if (def.officialBackup && def.officialBackup.done && def.officialBackup.configToml && !configLooksManaged(def.officialBackup.configToml)) {
    const authText = def.officialBackup.authJson || JSON.stringify(readJsonForUpdate(path.join(CODEX_HOME, "auth.json")), null, 2);
    writeCodexConfigPair(def.officialBackup.configToml, authText);
    return;
  }
  // 先移除本地路由段 + 直连中转段（无论哪种复原都要清掉，避免残留污染）
  text = removeTomlSection(text, `model_providers.${PROVIDER_ID}`);
  text = removeTomlSection(text, `model_providers.${DIRECT_PROVIDER_ID}`);
  if (def.modelProvider) {
    // 有原始直连 provider（纯 API key 用户，如 Mac 的 custom）：设根键 + 追加原始段，避免重复键。
    // 此分支完全保持旧行为（不动根级 model 行），确保已在用的 Mac 环境零回归。
    if (/^\s*model_provider\s*=/m.test(text)) text = text.replace(/^\s*model_provider\s*=.*$/m, `model_provider = "${def.modelProvider}"`);
    else text = `model_provider = "${def.modelProvider}"\n` + text;
    if (def.providerBlock) {
      text = removeTomlSection(text, `model_providers.${def.modelProvider}`);
      text = text.trimEnd() + "\n\n" + def.providerBlock;
    }
  } else {
    // 纯登录态（Windows 新格式 OAuth）：删根级 model_provider 覆盖，回到 Codex 原生登录直连。
    text = text.replace(/^\s*model_provider\s*=.*$\n?/m, "");
    // 清掉中转写入的根级 model；原始登录态通常无 model，若快照记了 origModel 则精确还原。
    text = text.replace(/^\s*model\s*=.*$\n?/m, "");
    if (def.origModel) text = `model = "${def.origModel}"\n` + text;
  }
  text = text.replace(/\n{3,}/g, "\n\n");
  const af = path.join(CODEX_HOME, "auth.json");
  let authText;
  // 优先用官方登录完整备份整体还原（含 OAuth tokens）→ 100% 复原官方登录态
  if (def.officialBackup && def.officialBackup.done && def.officialBackup.hadTokens && def.officialBackup.authJson) {
    authText = def.officialBackup.authJson;
  } else {
    const a = readJsonForUpdate(af);
    // 登录态：清空 OPENAI_API_KEY、保留 tokens → Codex 用 OAuth 直连；纯 key 用户则还原原始 key
    a.OPENAI_API_KEY = def.authKey || null;
    authText = JSON.stringify(a, null, 2);
  }
  writeCodexConfigPair(text, authText);
}

function getGroupKey(id) {
  load();
  const g = config.groups.find((x) => x.id === id);
  return g ? g.key : "";
}

// 按 id 取分组（含解密后的 key，供内部功能按指定分组直调中转）。只读，不改激活态/切回逻辑。
function groupById(id) {
  load();
  return config.groups.find((x) => x.id === id) || null;
}

// 登记一个模型属于哪个 OpenAI 兼容分组。生成团队时调用，运行时按请求 model 分流。
// 只保存模型名和分组归属，不改变当前激活分组，也不触碰 Codex 配置文件。
function registerModelRoute(groupId, model) {
  load();
  const name = String(model || "").trim();
  const group = config.groups.find((g) => g.id === groupId);
  if (!name || !group || group.isDefault || isClaudeGroup(group) || !group.baseUrl || !group.key) {
    return { ok: false, skipped: true };
  }
  let changed = false;
  config.groups.forEach((g) => {
    if (g.id === group.id) return;
    if (Array.isArray(g.routeModels) && g.routeModels.includes(name)) {
      g.routeModels = g.routeModels.filter((x) => x !== name);
      changed = true;
    }
  });
  group.routeModels = Array.isArray(group.routeModels) ? group.routeModels : [];
  if (!group.routeModels.includes(name)) {
    group.routeModels.push(name);
    changed = true;
  }
  if (changed) save();
  return { ok: true, groupId: group.id, model: name, changed };
}

// 可供画布等内部功能"按需选用"的中转分组列表：排除默认直连分组，需配齐 baseUrl+key。只读。
function usableGroups() {
  load();
  return config.groups.filter((g) => !g.isDefault && g.baseUrl && g.key);
}

// 给内部功能（如「会话记忆」摘要）用的可调用分组：优先当前激活的中转分组，
// 不可用则取第一个配置齐全的中转分组；默认分组（直连账号）不参与。
function llmGroup() {
  load();
  const usable = (g) => g && !g.isDefault && !isToolOnlyGroup(g) && g.baseUrl && g.key && g.model;
  const act = config.groups.find((g) => g.id === config.activeId);
  if (usable(act)) return act;
  return config.groups.find(usable) || null;
}

// 供「语音输入」转写用：优先当前激活且勾选 STT 的分组，否则取任一勾选 STT 的分组。
// 需配齐 baseUrl+key 且勾了 stt；返回的 group 带 sttModel（如 speech-01 / whisper-1）。
function sttGroup() {
  load();
  const ok = (g) => g && !g.isDefault && g.baseUrl && g.key && g.stt;
  const act = config.groups.find((g) => g.id === config.activeId);
  if (ok(act)) return act;
  return config.groups.find(ok) || null;
}

function modelFetchBases(baseUrl) {
  const base = String(baseUrl || "").replace(/\/$/, "");
  const bases = [base];
  try {
    const u = new URL(base);
    if (/\/anthropic$/i.test(u.pathname)) {
      u.pathname = u.pathname.replace(/\/anthropic$/i, "") || "/";
      bases.push(u.href.replace(/\/$/, ""));
    }
  } catch {}
  return Array.from(new Set(bases.filter(Boolean)));
}

function knownModelsForBase(baseUrl) {
  try {
    const u = new URL(String(baseUrl || ""));
    if (u.hostname === "api.deepseek.com" && /\/anthropic\/?$/i.test(u.pathname)) {
      return ["deepseek-v4-pro[1m]", "deepseek-v4-flash"];
    }
  } catch {}
  return [];
}

// 拉取某个中转 API 的模型列表（试 /v1/models 再 /models）
async function fetchModels(baseUrl, key) {
  if (!baseUrl) throw new Error("请先填 API 地址");
  let lastErr = null;
  for (const base of modelFetchBases(baseUrl)) {
    for (const p of ["/v1/models", "/models"]) {
      try {
        const res = await fetch(base + p, {
          headers: { Authorization: "Bearer " + (key || ""), "User-Agent": "codex-market" },
        });
        if (!res.ok) {
          lastErr = new Error("HTTP " + res.status);
          continue;
        }
        const j = await res.json();
        const arr = Array.isArray(j) ? j : j.data || j.models || [];
        const list = arr.map((m) => (typeof m === "string" ? m : m.id || m.name)).filter(Boolean);
        if (list.length) return Array.from(new Set(list));
      } catch (e) {
        lastErr = e;
      }
    }
  }
  const known = knownModelsForBase(baseUrl);
  if (known.length) return known;
  throw lastErr || new Error("未获取到模型列表（接口可能不支持 /v1/models）");
}

// —— 代理服务器 ——
let server = null;

// 抓取一次真实请求/响应到 userData/router-capture/（用于开发协议转换）
function captureDir() {
  return path.join(app.getPath("userData"), "router-capture");
}
function writeCapture(name, data) {
  try {
    fs.mkdirSync(captureDir(), { recursive: true });
    fs.writeFileSync(path.join(captureDir(), name), data);
  } catch {}
}

function upstreamHeaders(incoming, host, bodyLength) {
  const headers = { ...(incoming || {}) };
  const connectionHeaders = String(headers.connection || "")
    .split(",")
    .map((name) => name.trim().toLowerCase())
    .filter(Boolean);
  for (const name of connectionHeaders) delete headers[name];
  for (const name of [
    "connection",
    "proxy-connection",
    "keep-alive",
    "transfer-encoding",
    "te",
    "trailer",
    "upgrade",
    "content-length",
  ]) {
    delete headers[name];
  }
  headers.host = host;
  headers["content-length"] = bodyLength;
  return headers;
}

function requestTextForIntent(req) {
  const parts = [];
  const walk = (v) => {
    if (v == null) return;
    if (typeof v === "string") {
      parts.push(v);
      return;
    }
    if (Array.isArray(v)) {
      for (const it of v) walk(it);
      return;
    }
    if (typeof v === "object") {
      for (const key of ["text", "content", "input", "output", "arguments"]) walk(v[key]);
    }
  };
  walk(req && req.input);
  return parts.join("\n");
}

function hasExplicitGenImageIntent(req) {
  return /\$gen[\s_-]*image\b/i.test(requestTextForIntent(req));
}

function stripGenImageSkill(instructions) {
  if (typeof instructions !== "string" || !instructions.includes("gen-image")) return instructions;
  return instructions
    .split(/\r?\n/)
    .filter((line) => !/^\s*-\s+gen-image\s*:/.test(line))
    .join("\n");
}

function rewriteResponsesBody(body, group, { preserveModel = false } = {}) {
  if (!body.length) return body;
  let j;
  try {
    j = JSON.parse(body.toString("utf-8"));
  } catch {
    return body;
  }
  if (!j || typeof j !== "object") return body;
  let changed = false;
  if (!preserveModel && group.model && "model" in j && j.model !== group.model) {
    j.model = group.model;
    changed = true;
  }
  // 普通聊天分组没有 image-generation 权限时，上游会因 gen-image skill 声明误判为生图请求。
  // 只有用户显式输入 "$gen image" 才保留该 skill，让真正生图走脚本里的图片接口分组。
  if (!hasExplicitGenImageIntent(j)) {
    const nextInstructions = stripGenImageSkill(j.instructions);
    if (nextInstructions !== j.instructions) {
      j.instructions = nextInstructions;
      changed = true;
    }
  }
  return changed ? Buffer.from(JSON.stringify(j), "utf-8") : body;
}

function rewriteAnthropicBody(body, group) {
  const model = group && group.model ? String(group.model).trim() : "";
  if (!body.length || !model) return body;
  let j;
  try {
    j = JSON.parse(body.toString("utf-8"));
  } catch {
    return body;
  }
  if (!j || typeof j !== "object" || Array.isArray(j)) return body;
  if (j.model === model) return body;
  j.model = model;
  return Buffer.from(JSON.stringify(j), "utf-8");
}

function handle(req, res) {
  const wantClaude = reqIsAnthropic(req);
  // 校验路由 key（Codex 用 auth.json 里的 routerKey 作 Bearer 发来）
  const auth = req.headers["authorization"] || "";
  if (config.routerKey && auth !== "Bearer " + config.routerKey) {
    // 放行 localhost 但不匹配时也继续（避免 key 变动导致不可用），仅记录
  }
  const chunks = [];
  req.on("data", (c) => chunks.push(c));
  req.on("end", async () => {
    const rawBody = Buffer.concat(chunks);
    const routed = requestGroup(wantClaude, rawBody);
    const g = routed.group;
    if (!g) {
      res.writeHead(503, { "content-type": "text/plain; charset=utf-8" });
      res.end(wantClaude ? "本地路由：未选择 Claude Code 分组" : "本地路由：未选择中转分组");
      return;
    }
    let body = rawBody;
    const doCapture = /responses/.test(req.url || "");
    if (routed.routeModel) body = rewriteRequestModel(body, routed.routeModel);
    if (doCapture) body = rewriteResponsesBody(body, g, { preserveModel: routed.byModel });
    if (wantClaude) body = rewriteAnthropicBody(body, g);
    // —— chat 模式：Responses ⇄ Chat Completions 协议转换（DeepSeek/GLM/Kimi 等）——
    if (g.mode === "chat" && /responses/.test(req.url || "")) {
      let responsesReq = {};
      try {
        responsesReq = JSON.parse(body.toString("utf-8"));
      } catch {}
      if (g.multimodal) {
        try {
          await mediaUnderstanding.enrichResponsesRequest(responsesReq, {
            instruction: requestTextForIntent(responsesReq),
          });
        } catch {}
      }
      const chatReq = translate.responsesToChat(responsesReq, routed.byModel ? responsesReq.model : (g.model || responsesReq.model), {
        // 图片已由 MiniMax 预处理为证据，故只移除会读取原图的 view_image；
        // shell/文件等编码工具仍必须保留，否则模型只能回复一句文字而无法执行任务。
        omitVisualTools: !!g.multimodal,
      });
      const chatBody = Buffer.from(JSON.stringify(chatReq), "utf-8");
      // 拼 chat 端点：多数网关/厂商(DeepSeek/GLM/Kimi/one-api)是 /v1/chat/completions
      const cbase = g.baseUrl.replace(/\/$/, "");
      let chatEndpoint;
      if (/\/chat\/completions$/.test(cbase)) chatEndpoint = cbase; // 用户已填全
      else if (/\/v\d+$/.test(cbase)) chatEndpoint = cbase + "/chat/completions"; // 已含 /v1
      else chatEndpoint = cbase + "/v1/chat/completions";
      let chatUrl;
      try {
        chatUrl = new URL(chatEndpoint);
      } catch {
        res.writeHead(502);
        res.end("分组 API 地址无效");
        return;
      }
      const https2 = chatUrl.protocol === "https:";
      const conv = new translate.ChatToResponses(chatReq.model);
      let ended = false;
      const endOnce = (tail) => {
        if (ended) return;
        ended = true;
        if (tail) res.write(tail);
        res.end();
      };
      res.writeHead(200, { "content-type": "text/event-stream; charset=utf-8", "cache-control": "no-cache", connection: "keep-alive" });
      if (doCapture) writeCapture("last-chat-request.json", `UPSTREAM ${chatUrl.href}\n\n` + JSON.stringify(chatReq, null, 2));
      const up2 = (https2 ? https : http).request(
        {
          method: "POST",
          hostname: chatUrl.hostname,
          port: chatUrl.port || (https2 ? 443 : 80),
          path: chatUrl.pathname + chatUrl.search,
          headers: {
            "content-type": "application/json",
            authorization: "Bearer " + g.key,
            accept: "text/event-stream",
            host: chatUrl.host,
            "content-length": Buffer.byteLength(chatBody),
          },
        },
        (upRes) => {
          if (upRes.statusCode !== 200) {
            const eb = [];
            upRes.on("data", (c) => eb.push(c));
            upRes.on("end", () => {
              const raw = Buffer.concat(eb).toString("utf-8").slice(0, 2000);
              if (doCapture) writeCapture("last-chat-response.txt", `STATUS ${upRes.statusCode}\n\n` + raw);
              // 提取上游错误消息，作为一条助手回复显示给 Codex（而不是"断连"）
              let human = raw.slice(0, 800);
              try {
                const j = JSON.parse(raw);
                human = (j.error && (j.error.message || j.error)) || j.message || human;
              } catch {}
              let s = conv.onChunk({ choices: [{ delta: { content: `⚠️ 中转上游返回错误 (${upRes.statusCode})：\n${human}` } }] });
              s += conv.finish();
              endOnce(s);
            });
            return;
          }
          const rawBuf = [];
          let sseBuf = "";
          upRes.on("data", (chunk) => {
            if (doCapture) rawBuf.push(chunk);
            sseBuf += chunk.toString("utf-8");
            let i;
            while ((i = sseBuf.indexOf("\n")) >= 0) {
              const line = sseBuf.slice(0, i).trim();
              sseBuf = sseBuf.slice(i + 1);
              if (!line.startsWith("data:")) continue;
              const data = line.slice(5).trim();
              if (data === "[DONE]") {
                endOnce(conv.finish());
                return;
              }
              try {
                res.write(conv.onChunk(JSON.parse(data)));
              } catch {}
            }
          });
          upRes.on("end", () => {
            if (doCapture) writeCapture("last-chat-response.txt", `STATUS 200\n\n` + Buffer.concat(rawBuf).toString("utf-8").slice(0, 8000));
            endOnce(conv.finish());
          });
        }
      );
      up2.on("error", (e) => {
        if (doCapture) writeCapture("last-chat-response.txt", "PROXY ERROR: " + String(e.message || e));
        endOnce(conv.ev("error", { code: "proxy_error", message: String(e.message || e) }));
      });
      up2.end(chatBody);
      return;
    }

    let target;
    try {
      target = new URL(g.baseUrl.replace(/\/$/, "") + req.url);
    } catch {
      res.writeHead(502);
      res.end("分组 API 地址无效");
      return;
    }
    const isHttps = target.protocol === "https:";
    const mod = isHttps ? https : http;
    const headers = upstreamHeaders(req.headers, target.host, body.length);
    // Anthropic 风格请求（Claude Code 走 /v1/messages）：保持客户端原本的认证方式，只把密钥换成分组的真实密钥。
    // 关键：不要同时塞 Bearer + x-api-key —— 有的中转会据此判定为"直连 API 模式"而落到空账号池，返回 "No available accounts"。
    const isAnthropic = /\/v1\/messages/.test(req.url || "") || "anthropic-version" in headers || "x-api-key" in headers;
    if (isAnthropic) {
      if ("x-api-key" in headers) {
        headers["x-api-key"] = g.key; // 客户端用的是 x-api-key 模式
        delete headers["authorization"];
      } else {
        headers["authorization"] = "Bearer " + g.key; // Claude Code 默认：只发 Bearer
        delete headers["x-api-key"];
      }
      if (!headers["anthropic-version"]) headers["anthropic-version"] = "2023-06-01";
    } else {
      headers["authorization"] = "Bearer " + g.key; // 非 Anthropic（Codex 等）：换成分组密钥
    }
    // 1M 长上下文：若本次请求的模型被该分组标记为「1M」，加上 Anthropic 的 1M beta 头解锁百万窗口。
    // 对 GPT/GLM 等 OpenAI 兼容网关该头无害（被忽略）；对 Claude 生效。
    if (Array.isArray(g.oneMillionModels) && g.oneMillionModels.length && body.length) {
      let reqModel = "";
      try { reqModel = (JSON.parse(body.toString("utf-8")) || {}).model || ""; } catch {}
      if (reqModel && g.oneMillionModels.includes(reqModel)) {
        const beta = "context-1m-2025-08-07";
        const existing = headers["anthropic-beta"];
        headers["anthropic-beta"] = existing ? (existing.includes(beta) ? existing : existing + "," + beta) : beta;
      }
    }
    if (doCapture) {
      writeCapture("last-request.json", `URL ${req.method} ${req.url}\nUPSTREAM ${target.href}\n\n` + body.toString("utf-8"));
    }
    const up = mod.request(
      {
        method: req.method,
        hostname: target.hostname,
        port: target.port || (isHttps ? 443 : 80),
        path: target.pathname + target.search,
        headers,
      },
      (upRes) => {
        res.writeHead(upRes.statusCode || 502, upRes.headers);
        if (doCapture) {
          const buf = [];
          upRes.on("data", (c) => {
            buf.push(c);
            res.write(c);
          });
          upRes.on("end", () => {
            res.end();
            writeCapture("last-response.txt", `STATUS ${upRes.statusCode}\n\n` + Buffer.concat(buf).toString("utf-8"));
          });
        } else {
          upRes.pipe(res); // 流式透传（SSE 也 OK）
        }
      }
    );
    up.on("error", (e) => {
      if (!res.headersSent) res.writeHead(502, { "content-type": "text/plain; charset=utf-8" });
      res.end("上游错误：" + e.message);
    });
    up.end(body);
  });
}

function start() {
  load();
  if (server) return { running: true, port: config.port };
  return new Promise((resolve, reject) => {
    server = http.createServer(handle);
    server.on("error", (e) => {
      server = null;
      reject(e);
    });
    server.listen(config.port, "127.0.0.1", () => resolve({ running: true, port: config.port }));
  });
}
function stop() {
  if (server) {
    server.close();
    server = null;
  }
  return { running: false };
}

// 只解除本工具对 Codex 的接管，不把用户后来手写的 provider 覆盖成官方直连。
// 关键边界：如果根级 model_provider 已经不是 local-router/td-direct，说明用户已经
// 自己写了中转 provider，此时只清理本工具残留的段和路由 Key，保留用户配置。
function releaseCodexTakeover() {
  load();
  const cfgFile = path.join(CODEX_HOME, "config.toml");
  const before = readTextForUpdate(cfgFile);
  backupConfig(before);

  const managedProvider = isManagedProviderId(modelProviderFromText(before));
  let text = before;
  // 无论根级当前指向谁，都先移除本工具可能残留的两个段，避免污染用户配置。
  text = removeTomlSection(text, `model_providers.${PROVIDER_ID}`);
  text = removeTomlSection(text, `model_providers.${DIRECT_PROVIDER_ID}`);
  if (managedProvider) {
    // 根级还指向本工具，才删根级 model_provider 和根级 model；否则不碰用户配置。
    text = text.replace(/^\s*model_provider\s*=.*$\n?/m, "");
    text = text.replace(/^\s*model\s*=.*$\n?/m, "");
  }
  text = text.replace(/\n{3,}/g, "\n\n").trimEnd() + (text.trim() ? "\n" : "");

  const authFile = path.join(CODEX_HOME, "auth.json");
  const authRaw = readTextForUpdate(authFile);
  const auth = readJsonForUpdate(authFile);
  const authManaged = authLooksManaged(authRaw);
  if (authManaged) delete auth.OPENAI_API_KEY;
  writeCodexConfigPair(text, JSON.stringify(auth, null, 2));
  return {
    removedManagedProvider: managedProvider,
    keptUserProvider: !managedProvider && !!modelProviderFromText(text),
    authCleared: authManaged,
  };
}

// 路由页面的“停止”：关闭本地服务；只要 Codex 仍有本软件接管痕迹，就释放接管。
// 保留 stop() 的纯停止语义，避免改端口、退出应用等流程产生配置写入副作用。
function stopAndRestoreDirect() {
  return disableCodex();
}

// “取消本地路由”必须是幂等操作：无论路由进程当前是否运行，只要 Codex 配置仍由本工具接管，
// 都立即清除 local-router / td-direct / 路由 Key，同时保留用户自己写的 provider。
function disableCodex() {
  load();
  const shouldRelease = configLooksManaged(readConfigToml())
    || authLooksManaged(readTextIfExists(path.join(CODEX_HOME, "auth.json")));
  const stopped = stop();
  if (!shouldRelease) return { ...stopped, released: false, skippedRelease: true };
  try {
    const detail = releaseCodexTakeover();
    return { ...stopped, released: true, ...detail };
  } catch (e) {
    return { ...stopped, released: false, releaseError: String((e && e.message) || e) };
  }
}
function isRunning() {
  return !!server;
}

function status() {
  load();
  return {
    running: isRunning(),
    port: config.port,
    routerKey: config.routerKey,
    address: `http://127.0.0.1:${config.port}`,
    activeId: config.activeId,
    activeClaudeId: config.activeClaudeId,
    claudeApplied: claudeApplied(),
    codexApplied: codexRouteApplied(),
    groups: config.groups.map((g) => ({
      id: g.id,
      name: g.name,
      baseUrl: g.isDefault ? "（Codex 原始配置 · 直连你的账号）" : g.baseUrl,
      model: g.model || "",
      mode: g.mode || "responses",
      contextWindow: g.contextWindow || "",
      hasKey: g.isDefault ? true : !!g.key,
      isDefault: !!g.isDefault,
      codexImage: !!g.codexImage,
      codexVideo: !!g.codexVideo,
      stt: !!g.stt,
      sttModel: g.sttModel || "",
      multimodal: !!g.multimodal,
      oneMillionModels: Array.isArray(g.oneMillionModels) ? g.oneMillionModels : [],
    })),
  };
}

function defaultConfigInfo() {
  load();
  const def = config.groups.find((g) => g.isDefault) || null;
  if (def && snapshotOfficialLogin(def)) save();
  const currentConfigToml = readConfigToml();
  const snapshotConfigToml = (def && def.officialBackup && def.officialBackup.configToml) || "";
  const snapshotAuthJson = (def && def.officialBackup && def.officialBackup.authJson) || "";
  return {
    ok: true,
    codexHome: CODEX_HOME,
    configPath: path.join(CODEX_HOME, "config.toml"),
    authPath: path.join(CODEX_HOME, "auth.json"),
    currentConfigToml,
    snapshotConfigToml,
    current: {
      modelProvider: currentModelProvider() || "Codex 原生登录态",
      model: currentRootModel() || "",
      managed: configLooksManaged(currentConfigToml) || authLooksManaged(readTextIfExists(path.join(CODEX_HOME, "auth.json"))),
      auth: readAuthSummary(),
    },
    snapshot: {
      savedAt: def && def.officialBackup && def.officialBackup.ts ? def.officialBackup.ts : 0,
      repairedAt: def && def.officialBackup && def.officialBackup.repairedTs ? def.officialBackup.repairedTs : 0,
      modelProvider: (def && def.modelProvider) || "Codex 原生登录态",
      model: (def && def.origModel) || "",
      hasProviderBlock: !!(def && def.providerBlock),
      managed: configLooksManaged(snapshotConfigToml) || authLooksManaged(snapshotAuthJson),
      auth: authSummaryFromText(snapshotAuthJson),
    },
  };
}

// ——————————————————————————————————————————————————————————————
// gen-image 生图技能：把「用于 Codex 生图」的中转分组凭证写进技能的 .env
// ——————————————————————————————————————————————————————————————
// 技能目录名可能因显示名不同而变（市场安装按 skill.name 派生中文目录），
// 故扫描各 skills/*/SKILL.md 的 name 字段来定位，而非写死路径。
function genImageSkillDir() {
  const base = path.join(CODEX_HOME, "skills");
  let names = [];
  try {
    names = fs.readdirSync(base, { withFileTypes: true })
      .filter((d) => d.isDirectory() || d.isSymbolicLink())
      .map((d) => d.name);
  } catch {
    return null;
  }
  for (const name of names) {
    try {
      const txt = fs.readFileSync(path.join(base, name, "SKILL.md"), "utf-8");
      const fm = /^---\s*\n([\s\S]*?)\n---/.exec(txt);
      const scope = fm ? fm[1] : txt.slice(0, 400);
      const m = /^\s*name\s*:\s*(.+)$/im.exec(scope);
      if (m && m[1].trim().replace(/^["']|["']$/g, "") === "gen-image") return path.join(base, name);
    } catch {}
  }
  for (const guess of ["gen-image", "gen-image-生图"]) {
    if (fs.existsSync(path.join(base, guess, "SKILL.md"))) return path.join(base, guess);
  }
  return null;
}

function writeGenImageEnv(dir, baseUrl, key, model) {
  const body =
    "# 由 TD工具箱「中转」自动写入：勾选“在 Codex 中用于生图”的分组凭证。\n" +
    "# 取消勾选 / 删除该分组会被清除。请勿手动提交到 git。\n" +
    `IMAGE_API_BASE_URL=${baseUrl || ""}\n` +
    `IMAGE_API_KEY=${key || ""}\n` +
    `IMAGE_MODEL=${model || "gpt-image-2"}\n`;
  const p = path.join(dir, ".env");
  fs.writeFileSync(p, body, "utf-8");
  try { fs.chmodSync(p, 0o600); } catch {}
}

function clearGenImageEnv(dir) {
  const p = path.join(dir, ".env");
  try {
    if (!fs.existsSync(p)) return;
    // 只清除工具箱自动写入的那份，保留用户手工建的 .env（避免误删）
    if (fs.readFileSync(p, "utf-8").includes("由 TD工具箱")) fs.unlinkSync(p);
  } catch {}
}

// 依据当前分组的 codexImage 标记，同步写入/清除 gen-image 的 .env。
// 生图默认用 gpt-image-2（分组的 model 是对话模型，不用于生图）。
function syncGenImage() {
  load();
  const dir = genImageSkillDir();
  const src = config.groups.find((g) => g.codexImage && !g.isDefault && g.baseUrl && g.key);
  if (!dir) return { ok: false, reason: src ? "skill-not-installed" : "no-skill" };
  if (!src) { clearGenImageEnv(dir); return { ok: true, cleared: true, dir }; }
  writeGenImageEnv(dir, src.baseUrl, src.key, src.imageModel || "gpt-image-2");
  return { ok: true, wrote: true, dir, group: src.name };
}

// —— 分组增删改 / 切换 ——
function upsertGroup(g) {
  load();
  // 附件理解仅在 Responses -> Chat 的转译路径生效，避免错误保存到其它协议分组。
  g.multimodal = g.mode === "chat" && !!g.multimodal;
  let id;
  let prevMode = null; // 编辑前的接口类型（用于判断是否从 claude 改成别的）
  if (g.id) {
    const i = config.groups.findIndex((x) => x.id === g.id);
    if (i >= 0) { prevMode = config.groups[i].mode || "responses"; config.groups[i] = { ...config.groups[i], ...g }; }
    else config.groups.push({ ...g });
    id = g.id;
  } else {
    g.id = "g-" + crypto.randomBytes(6).toString("hex");
    config.groups.push(g);
    id = g.id;
  }
  // 生图来源唯一：勾选的分组独占，清掉其它分组的标记
  const cur = config.groups.find((x) => x.id === id);
  if (cur && cur.codexImage) {
    for (const grp of config.groups) if (grp.id !== id) grp.codexImage = false;
  }
  // 视频来源唯一：勾选的分组独占，清掉其它分组的标记
  if (cur && cur.codexVideo) {
    for (const grp of config.groups) if (grp.id !== id) grp.codexVideo = false;
  }
  if (isToolOnlyGroup(cur) && config.activeId === id) {
    const next = config.groups.find((x) => !isClaudeGroup(x) && !x.isDefault && !isToolOnlyGroup(x))
      || config.groups.find((x) => !isClaudeGroup(x) && !isToolOnlyGroup(x));
    config.activeId = next ? next.id : null;
  }
  if (isToolOnlyGroup(cur) && config.activeClaudeId === id) {
    const next = config.groups.find((x) => isClaudeGroup(x) && !isToolOnlyGroup(x));
    config.activeClaudeId = next ? next.id : null;
  }
  save();
  try { syncGenImage(); } catch {}
  // 保存只保存配置，不自动接入 Codex/Claude，也不改 activeId。
  // 真正启用由用户点击列表单选触发 setActive，避免插件专用分组被误设为默认对话分组。
  const st = status();
  if (cur && !cur.isDefault) {
    if (cur.id === config.activeClaudeId && cur.mode === "claude") {
      try {
        const r = claudeApplied() ? applyToClaudeCode() : (claudeDirectApplied() ? applyDirectToClaude(cur.id) : null);
        if (r && r.ok) st._claudeApplied = true;
        else if (r && !r.ok) { st._claudeSkipped = r.skipped; st._claudeReason = r.error; }
      } catch (e) {
        st._claudeError = (e && e.message) || String(e);
      }
    }
    // 仅当【本分组】之前是 claude 模式、现改回 Codex 模式 → 还原它写过的 Claude Code 配置
    if (prevMode === "claude" && cur.mode !== "claude" && config.claudePrev && claudeDirectApplied()) {
      try { restoreClaudeCode(); st._claudeRestored = true; } catch {}
    }
  }
  return st;
}
function deleteGroup(id) {
  load();
  const g = config.groups.find((x) => x.id === id);
  if (g && g.isDefault) return { ...status(), error: "默认分组不可删除" };
  const wasClaude = isClaudeGroup(g);
  config.groups = config.groups.filter((x) => x.id !== id);
  // 删的是哪族分组，就补选同族的另一个（找不到则清空该族激活槽），不影响另一族。
  if (wasClaude) {
    if (config.activeClaudeId === id) {
      const next = config.groups.find((x) => isClaudeGroup(x) && !isToolOnlyGroup(x));
      config.activeClaudeId = next ? next.id : null;
    }
  } else {
    if (config.activeId === id) {
      const next = config.groups.find((x) => !isClaudeGroup(x) && !x.isDefault && !isToolOnlyGroup(x))
        || config.groups.find((x) => !isClaudeGroup(x) && !isToolOnlyGroup(x));
      config.activeId = next ? next.id : null;
    }
  }
  save();
  try { syncGenImage(); } catch {}  // 删掉的可能正是生图来源，同步清除 .env
  return status();
}
function setActive(id) {
  load();
  const target = config.groups.find((g) => g.id === id);
  if (!target) return status();
  if (isToolOnlyGroup(target)) {
    return {
      ...status(),
      _activeSkipped: true,
      _activeReason: "该分组是插件/画布专用分组，不参与 Codex/GPT 默认分组选择",
    };
  }
  // Claude Code（Anthropic 族）：落 activeClaudeId，写 ~/.claude/settings.json，绝不碰 Codex 配置。
  // 与 OpenAI 族互不顶替 —— 两族可同时激活。
  if (isClaudeGroup(target)) {
    const previousActiveClaudeId = config.activeClaudeId;
    const hadClaudePrev = Object.prototype.hasOwnProperty.call(config, "claudePrev");
    const previousClaudePrev = hadClaudePrev ? JSON.parse(JSON.stringify(config.claudePrev)) : undefined;
    config.activeClaudeId = id;
    try {
      let claudeMode = "proxy";
      let claudeSkipped, claudeReason;
      if (isRunning()) {
        // 路由在跑：settings.json 指向本地路由，并同步 ANTHROPIC_MODEL 让新开 CLI 立即显示当前分组模型。
        claudeMode = "proxy";
        const r = applyToClaudeCode();
        if (!r.ok) { claudeSkipped = r.skipped; claudeReason = r.error; }
      } else {
        // 默认模式：直连中转，把分组地址写进 settings.json（新开 claude 会话生效）
        claudeMode = "direct";
        const r = applyDirectToClaude(id);
        if (!r.ok) { claudeSkipped = r.skipped; claudeReason = r.error; }
      }
      save();
      return { ...status(), _mode: claudeMode, _claudeSkipped: claudeSkipped, _claudeReason: claudeReason };
    } catch (e) {
      config.activeClaudeId = previousActiveClaudeId;
      if (hadClaudePrev) config.claudePrev = previousClaudePrev;
      else delete config.claudePrev;
      save();
      throw e;
    }
  }
  const before = currentModelProvider();
  const wasTakenOver = before === PROVIDER_ID || before === DIRECT_PROVIDER_ID;
  const previousActiveId = config.activeId;
  let needsRestart = false;
  let needsCodexRefresh = false;
  let mode = "proxy";
  config.activeId = id;
  try {
    if (target.isDefault) {
      // 切回默认 = 还原原始配置，Codex 直连自己账号（需重启 Codex）
      restoreDirect();
      mode = "direct";
      needsRestart = wasTakenOver; // 之前在走路由或直连中转 → 需重启
    } else if (isRunning()) {
      // 路由进程在跑（高级模式）：先更新 activeId，再同步本地路由和目标模型。
      mode = "proxy";
      if (before !== PROVIDER_ID) {
        applyToCodex();
        needsRestart = true; // 从直连/默认切到路由 → 需重启一次
      } else if (target.model) {
        // 路由进程已经接管 Codex：上游请求会即时切到新模型，但 Codex 客户端的
        // 顶部模型选择器只在启动时读取 config.toml 的根级 model，不会热刷新。
        const beforeModel = currentRootModel();
        applyModelCatalog(target);
        setConfigModel(target.model);
        needsCodexRefresh = beforeModel !== target.model;
      }
    } else {
      // 默认模式：直连中转，改 config.toml 指向该分组地址（必然需重启 Codex）
      mode = "direct";
      const r = applyDirectToCodex(id);
      // applyDirectToCodex 内部已保存；chat/缺 key 则不写配置，但保留用户选中的分组。
      needsRestart = !!r.ok && !r.restored;
      save();
      return { ...status(), _needsRestart: needsRestart, _mode: mode, _directSkipped: r.skipped, _directReason: r.error };
    }
    save();
    return { ...status(), _needsRestart: needsRestart, _needsCodexRefresh: needsCodexRefresh, _mode: mode };
  } catch (e) {
    config.activeId = previousActiveId;
    save();
    throw e;
  }
}
function setPort(port) {
  load();
  config.port = parseInt(port, 10) || 8787;
  save();
  return status();
}

// —— 自动配置 Codex —— 写 config.toml 的 local-router provider + auth.json 的 routerKey
function codexSnippet() {
  load();
  return `model_provider = "${PROVIDER_ID}"\n\n[model_providers.${PROVIDER_ID}]\nname = "本地路由"\nbase_url = "http://127.0.0.1:${config.port}"\nwire_api = "responses"\nrequires_openai_auth = true`;
}

function applyToCodex() {
  load();
  // 本地路由需要一个中转分组做上游；若当前是默认/空，自动选第一个中转分组（排除 claude 模式）
  const cur = config.groups.find((g) => g.id === config.activeId);
  if (!cur || cur.isDefault || cur.mode === "claude" || isToolOnlyGroup(cur)) {
    const proxy = config.groups.find((g) => !g.isDefault && g.mode !== "claude" && !isToolOnlyGroup(g));
    if (proxy) config.activeId = proxy.id;
  }
  const cfgFile = path.join(CODEX_HOME, "config.toml");
  let text = readTextForUpdate(cfgFile);
  // 备份
  try {
    fs.mkdirSync(path.join(CODEX_HOME, "backups_state", "router"), { recursive: true });
    fs.writeFileSync(path.join(CODEX_HOME, "backups_state", "router", "config.toml." + Date.now() + ".bak"), text);
  } catch {}

  // 替换/插入 model_provider 根键
  if (/^\s*model_provider\s*=/m.test(text)) {
    text = text.replace(/^\s*model_provider\s*=.*$/m, `model_provider = "${PROVIDER_ID}"`);
  } else {
    text = `model_provider = "${PROVIDER_ID}"\n` + text;
  }
  // 清掉「默认分组」原始 provider 的旧段（已存进 router.json，避免残留误导）
  const def = config.groups.find((g) => g.isDefault);
  if (def && def.modelProvider && def.modelProvider !== PROVIDER_ID) {
    text = removeTomlSection(text, `model_providers.${def.modelProvider}`);
  }
  // 替换/插入 [model_providers.local-router] 段：先删旧的（含被 bug 弄重复的），再追加干净的
  const block = `[model_providers.${PROVIDER_ID}]\nname = "本地路由"\nbase_url = "http://127.0.0.1:${config.port}"\nwire_api = "responses"\nrequires_openai_auth = true\n`;
  text = removeTomlSection(text, `model_providers.${PROVIDER_ID}`);
  text = text.trimEnd() + "\n\n" + block;

  // auth.json 写 routerKey（保留其它字段），Codex 会把它当 Bearer 发到本地路由
  const authFile = path.join(CODEX_HOME, "auth.json");
  const auth = readJsonForUpdate(authFile);
  auth.OPENAI_API_KEY = config.routerKey;
  // 当前分组若指定了模型 → 写模型目录窗口 + 设 config 模型
  const cur2 = config.groups.find((g) => g.id === config.activeId);
  if (cur2 && !cur2.isDefault && cur2.model) {
    applyModelCatalog(cur2);
    ensureModelInCatalog(cur2.model);
    text = setRootModelInText(text, cur2.model);
  }
  text = ensureCatalogLinked(text);
  writeCodexConfigPair(text, JSON.stringify(auth, null, 2));
  // 先回填该中转站的全部文本模型进目录（异步、不阻塞、失败不动目录），
  // 保证用户之后在 Codex 本体里切到任何模型都不会因"模型不在目录"而丢会话。
  if (cur2 && !cur2.isDefault) syncCatalogFromProvider(cur2).catch(() => {});
  save();
  return { ok: true };
}

// —— 直连中转写配置（不经本地路由，不起进程）——
// 把指定分组的中转 base_url/key 直接写进 config.toml + auth.json，Codex 直连中转站。
// 仅在用户明确选择/接入分组时调用；重启 Codex 生效。chat 模式分组需协议转换、无法直连 → 拒绝。
function applyDirectToCodex(groupId) {
  load();
  const g = config.groups.find((x) => x.id === (groupId || config.activeId));
  if (!g) return { ok: false, error: "分组不存在" };
  if (isToolOnlyGroup(g)) {
    return { ok: false, skipped: true, error: "该分组是插件/画布专用分组，不写入 Codex 默认配置" };
  }
  if (g.isDefault) {
    restoreDirect(); // 默认分组语义 = 回到官方登录直连
    config.activeId = g.id;
    save();
    return { ok: true, restored: true };
  }
  if (!g.baseUrl || !g.key) {
    return { ok: false, skipped: true, error: "该分组缺少 API 地址或密钥，未写入 Codex 配置" };
  }
  if (g.mode === "chat") {
    return { ok: false, skipped: true, needRouter: true, error: "该分组为 Chat 协议转换模式，直连 Codex 不支持，需启用本地路由" };
  }
  if (g.mode === "claude") {
    return { ok: false, skipped: true, error: "该分组为 Claude Code 类型，不写入 Codex 配置" };
  }

  // 接管前先确保官方登录已完整备份（幂等）
  const def = config.groups.find((x) => x.isDefault);
  if (def) snapshotOfficialLogin(def);

  const cfgFile = path.join(CODEX_HOME, "config.toml");
  let text = readTextForUpdate(cfgFile);
  backupConfig(text);

  // 清理其他接管痕迹：本地路由段、上次直连段、默认分组原始 provider 段
  text = removeTomlSection(text, `model_providers.${PROVIDER_ID}`);
  text = removeTomlSection(text, `model_providers.${DIRECT_PROVIDER_ID}`);
  if (def && def.modelProvider && def.modelProvider !== DIRECT_PROVIDER_ID) {
    text = removeTomlSection(text, `model_providers.${def.modelProvider}`);
  }
  // 替换/插入根键 → 指向直连 provider
  if (/^\s*model_provider\s*=/m.test(text)) {
    text = text.replace(/^\s*model_provider\s*=.*$/m, `model_provider = "${DIRECT_PROVIDER_ID}"`);
  } else {
    text = `model_provider = "${DIRECT_PROVIDER_ID}"\n` + text;
  }
  // 追加 [model_providers.td-direct] 段：base_url = 分组真实中转地址（非 127.0.0.1）
  const base = g.baseUrl.replace(/\/+$/, "");
  const block = `[model_providers.${DIRECT_PROVIDER_ID}]\nname = "${(g.name || "中转直连").replace(/"/g, "")}"\nbase_url = "${base}"\nwire_api = "responses"\nrequires_openai_auth = true\n`;
  text = text.trimEnd() + "\n\n" + block;
  text = text.replace(/\n{3,}/g, "\n\n");

  // auth.json 写分组真实 key（Codex 直连中转站时用它作 Bearer）
  const authFile = path.join(CODEX_HOME, "auth.json");
  const auth = readJsonForUpdate(authFile);
  auth.OPENAI_API_KEY = g.key;

  // 分组指定模型 → 写模型目录窗口 + 设根级 model
  if (g.model) {
    applyModelCatalog(g);
    ensureModelInCatalog(g.model);
    text = setRootModelInText(text, g.model);
  }
  text = ensureCatalogLinked(text);
  writeCodexConfigPair(text, JSON.stringify(auth, null, 2));
  // 先回填：把该中转站能用的全部文本模型登记进 Codex 模型目录（异步、不阻塞保存、失败不动目录）。
  // 这样即便用户之后在 Codex 本体的模型选择器里切到别的模型（那条路径不经过本 App），
  // 目标模型也已在目录里 → Codex 能正常启动、侧栏历史不再"消失"。
  syncCatalogFromProvider(g).catch(() => {});
  config.activeId = g.id;
  save();
  return { ok: true, direct: true, group: g.name };
}
function claudeSettingsPath() {
  return path.join(CLAUDE_HOME, "settings.json");
}

function applyToClaudeCode() {
  load();
  // Anthropic 请求由路由按 activeClaudeId 派发（见 handle）；这里只把 settings.json 指向本地路由。
  // 不再动 activeId（OpenAI/Codex 槽）—— 两族独立，接入 Claude Code 不该顶掉 Codex 的选择。
  fs.mkdirSync(CLAUDE_HOME, { recursive: true });
  const p = claudeSettingsPath();
  const existed = fs.existsSync(p);
  const settings = readJsonForUpdate(p);
  // 备份原文件
  if (existed) {
    try {
      const dir = path.join(CLAUDE_HOME, "backups_router");
      fs.mkdirSync(dir, { recursive: true });
      fs.writeFileSync(path.join(dir, "settings.json." + Date.now() + ".bak"), fs.readFileSync(p));
    } catch {}
  }
  settings.env = settings.env || {};
  // 首次接入时记住用户原有值，便于「取消接入」还原。
  // 老版本只记录了 base/token；这里补记 model，避免覆盖后无法还原。
  if (!config.claudePrev) {
    config.claudePrev = {
      base: Object.prototype.hasOwnProperty.call(settings.env, "ANTHROPIC_BASE_URL") ? settings.env.ANTHROPIC_BASE_URL : null,
      token: Object.prototype.hasOwnProperty.call(settings.env, "ANTHROPIC_AUTH_TOKEN") ? settings.env.ANTHROPIC_AUTH_TOKEN : null,
      model: Object.prototype.hasOwnProperty.call(settings.env, "ANTHROPIC_MODEL") ? settings.env.ANTHROPIC_MODEL : null,
    };
  } else if (!Object.prototype.hasOwnProperty.call(config.claudePrev, "model")) {
    config.claudePrev.model = Object.prototype.hasOwnProperty.call(settings.env, "ANTHROPIC_MODEL") ? settings.env.ANTHROPIC_MODEL : null;
  }
  settings.env.ANTHROPIC_BASE_URL = `http://127.0.0.1:${config.port}`;
  settings.env.ANTHROPIC_AUTH_TOKEN = config.routerKey;
  const g = activeGroup(true);
  if (g && g.model && g.model.trim()) settings.env.ANTHROPIC_MODEL = g.model.trim();
  else delete settings.env.ANTHROPIC_MODEL;
  safeWriteFileSync(p, JSON.stringify(settings, null, 2), "utf-8");
  try {
    fs.chmodSync(p, 0o600);
  } catch {}
  save();
  return { ok: true, path: p };
}

// 取消接入：把 settings.json 里的两项还原成用户原值（或删除）
function restoreClaudeCode() {
  load();
  const p = claudeSettingsPath();
  if (!fs.existsSync(p)) return { ok: true }; // 没有文件就无需还原
  const settings = readJsonForUpdate(p);
  settings.env = settings.env || {};
  const prev = config.claudePrev || { base: null, token: null, model: null };
  for (const [k, v] of [["ANTHROPIC_BASE_URL", prev.base], ["ANTHROPIC_AUTH_TOKEN", prev.token], ["ANTHROPIC_MODEL", prev.model]]) {
    if (v == null) delete settings.env[k];
    else settings.env[k] = v;
  }
  if (settings.env && Object.keys(settings.env).length === 0) delete settings.env;
  safeWriteFileSync(p, JSON.stringify(settings, null, 2), "utf-8");
  delete config.claudePrev;
  save();
  return { ok: true };
}

// Claude Code 是否已指向本地路由
function claudeApplied() {
  try {
    const s = JSON.parse(fs.readFileSync(claudeSettingsPath(), "utf-8"));
    return !!(s.env && s.env.ANTHROPIC_BASE_URL === `http://127.0.0.1:${(config || {}).port || 8787}`);
  } catch {
    return false;
  }
}

// —— Claude Code 直连中转（不经本地路由）——
// 把指定分组的中转地址/key 直接写进 ~/.claude/settings.json 的 env，Claude Code 直连中转站。
// 与 applyToClaudeCode（写本地路由地址）对称，但 base_url = 分组主地址（非 127.0.0.1）。
function applyDirectToClaude(groupId) {
  load();
  const g = config.groups.find((x) => x.id === (groupId || config.activeId));
  if (!g) return { ok: false, error: "分组不存在" };
  if (g.isDefault) return { ok: false, error: "默认分组不接入 Claude Code" };
  if (isToolOnlyGroup(g)) return { ok: false, skipped: true, error: "该分组是插件/画布专用分组，不写入 Claude Code 配置" };
  // Claude Code 直连用分组主字段：API 地址 baseUrl、API 密钥 key、默认模型 model
  if (!g.baseUrl || !g.key) {
    return { ok: false, skipped: true, error: "该分组缺少 API 地址或密钥，未写入 Claude Code 配置" };
  }
  const base = g.baseUrl.replace(/\/+$/, "");

  fs.mkdirSync(CLAUDE_HOME, { recursive: true });
  const p = claudeSettingsPath();
  const existed = fs.existsSync(p);
  const settings = readJsonForUpdate(p);
  // 备份原文件
  if (existed) {
    try {
      const dir = path.join(CLAUDE_HOME, "backups_router");
      fs.mkdirSync(dir, { recursive: true });
      fs.writeFileSync(path.join(dir, "settings.json." + Date.now() + ".bak"), fs.readFileSync(p));
    } catch {}
  }
  settings.env = settings.env || {};
  // 首次接入时记住用户原有值，便于「取消接入」还原（与 applyToClaudeCode 共用 claudePrev）
  if (!config.claudePrev) {
    config.claudePrev = {
      base: Object.prototype.hasOwnProperty.call(settings.env, "ANTHROPIC_BASE_URL") ? settings.env.ANTHROPIC_BASE_URL : null,
      token: Object.prototype.hasOwnProperty.call(settings.env, "ANTHROPIC_AUTH_TOKEN") ? settings.env.ANTHROPIC_AUTH_TOKEN : null,
      model: Object.prototype.hasOwnProperty.call(settings.env, "ANTHROPIC_MODEL") ? settings.env.ANTHROPIC_MODEL : null,
    };
  }
  settings.env.ANTHROPIC_BASE_URL = base;
  settings.env.ANTHROPIC_AUTH_TOKEN = g.key;
  if (g.model && g.model.trim()) settings.env.ANTHROPIC_MODEL = g.model.trim();
  else delete settings.env.ANTHROPIC_MODEL;
  safeWriteFileSync(p, JSON.stringify(settings, null, 2), "utf-8");
  try { fs.chmodSync(p, 0o600); } catch {}
  save();
  return { ok: true, direct: true, path: p, group: g.name };
}

// Claude Code 是否已指向某个中转直连地址（非本地路由）
function claudeDirectApplied() {
  try {
    const s = JSON.parse(fs.readFileSync(claudeSettingsPath(), "utf-8"));
    const url = s.env && s.env.ANTHROPIC_BASE_URL;
    return !!(url && !/127\.0\.0\.1/.test(url));
  } catch {
    return false;
  }
}

module.exports = {
  load,
  setCodexDataDir,
  start,
  stop,
  stopAndRestoreDirect,
  disableCodex,
  isRunning,
  status,
  defaultConfigInfo,
  upsertGroup,
  deleteGroup,
  setActive,
  setPort,
  applyToCodex,
  applyDirectToCodex,
  codexSnippet,
  applyToClaudeCode,
  applyDirectToClaude,
  restoreClaudeCode,
  claudeApplied,
  claudeDirectApplied,
  getGroupKey,
  syncGenImage,
  groupById,
  registerModelRoute,
  usableGroups,
  llmGroup,
  sttGroup,
  fetchModels,
  syncCatalogFromProvider,
};