#!/usr/bin/env node
'use strict';

const assert = require('assert/strict');
const fs = require('fs');
const os = require('os');
const path = require('path');

function envValue(filePath, key) {
  const content = fs.readFileSync(filePath, 'utf8');
  const match = content.match(new RegExp(`^${key}=(.*)$`, 'm'));
  return match ? match[1].trim() : undefined;
}

async function main() {
  const packageRoot = path.resolve(__dirname, '..');
  const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'qiwei-account-switch-'));
  const previousCwd = process.cwd();
  const previousEnv = { ...process.env };
  const originalFetch = global.fetch;
  const requests = [];

  try {
    process.env.USERPROFILE = tempRoot;
    process.env.HOME = tempRoot;
    process.env.QIWEI_WORKSPACE_ROOT = tempRoot;
    process.env.QIWEI_OUTPUTS_DIR = path.join(tempRoot, 'outputs');
    process.env.CLAUDE_CODE_WORKDIR = tempRoot;
    process.env.QIWEI_AUTH_TOKEN = 'test-account-switch-token';
    delete process.env.QIWEI_UID;
    delete process.env.QIWE_UID;
    delete process.env.QIWEI_GUID;
    delete process.env.QIWE_GUID;
    process.chdir(tempRoot);

    const credentials = require(path.join(packageRoot, 'mcp', 'src', 'core', 'credentials'));
    const login = require(path.join(packageRoot, 'mcp', 'src', 'tools', 'qiwei-login-run'));
    assert.equal(path.dirname(credentials.CREDENTIALS_FILE), path.join(tempRoot, '.claude'));

    const envFile = path.join(tempRoot, '.env.local');
    credentials.saveQiweiClientConfig({
      uid: 'uid-account-a',
      guid: 'guid-account-a',
      apiBase: 'https://gateway.example/api/qiwei',
      envRoot: tempRoot,
    });
    assert.equal(envValue(envFile, 'QIWEI_UID'), 'uid-account-a');
    assert.equal(envValue(envFile, 'QIWEI_GUID'), 'guid-account-a');
    assert.equal(credentials.readQiweiGuid({ uid: 'uid-account-b' }), '');

    let checkLoggedIn = false;
    global.fetch = async (rawUrl, options = {}) => {
      const url = new URL(String(rawUrl));
      const body = options.body ? JSON.parse(options.body) : {};
      requests.push({ path: url.pathname, body });
      let data = {};
      if (url.pathname.endsWith('/login/start')) data = { uid: body.uid };
      else if (url.pathname.endsWith('/login/check')) {
        data = checkLoggedIn
          ? { uid: body.uid, status: 2, detail: { userId: 'user-b', nickname: '账号 B', guid: 'guid-account-b' } }
          : { uid: body.uid, status: 10, detail: {} };
      } else if (url.pathname.endsWith('/login/verify')) data = { accepted: true };
      else if (url.pathname.endsWith('/login/status')) data = { configured: true, online: true, statusCode: 2, detail: { userId: 'user-b', nickname: '账号 B' } };
      return new Response(JSON.stringify({ code: 0, data }), {
        status: 200,
        headers: { 'Content-Type': 'application/json' },
      });
    };

    const common = {
      uid: 'uid-account-b',
      authToken: 'test-account-switch-token',
      apiBase: 'https://gateway.example/api/qiwei',
      flowUi: false,
      openBrowser: false,
      persistConfig: false,
      skipSubscriptionCheck: true,
    };
    await login.qiweiLoginStart(common);
    const pending = await login.qiweiLoginCheck(common);
    assert.equal(pending.status, 'needs_verify_code');
    await login.qiweiLoginVerify({ ...common, code: '123456' });
    for (const request of requests.slice(0, 3)) {
      assert.equal(request.body.uid, 'uid-account-b');
      assert.equal(Object.prototype.hasOwnProperty.call(request.body, 'guid'), false);
    }

    checkLoggedIn = true;
    const loggedIn = await login.qiweiLoginCheck(common);
    assert.equal(loggedIn.summary.loggedIn, true);
    assert.equal(loggedIn.data.guid, 'guid-account-b');
    assert.equal(Object.prototype.hasOwnProperty.call(requests.at(-1).body, 'guid'), false);

    const { switchActiveAccount } = require(path.join(packageRoot, 'mcp', 'src', 'dashboard', 'agent-service'));
    await switchActiveAccount({
      uid: 'uid-account-b',
      guid: loggedIn.data.guid,
      apiBase: common.apiBase,
      userId: 'user-b',
      nickname: '账号 B',
    });
    assert.equal(envValue(envFile, 'QIWEI_UID'), 'uid-account-b');
    assert.equal(envValue(envFile, 'QIWEI_GUID'), 'guid-account-b');
    assert.equal(credentials.readQiweiGuid({ uid: 'uid-account-b' }), 'guid-account-b');

    await switchActiveAccount({
      uid: 'uid-account-c',
      guid: '',
      apiBase: common.apiBase,
      userId: 'user-c',
      nickname: '账号 C',
    });
    assert.equal(envValue(envFile, 'QIWEI_UID'), 'uid-account-c');
    assert.equal(envValue(envFile, 'QIWEI_GUID'), '');
    assert.equal(credentials.readQiweiGuid({ uid: 'uid-account-c' }), '');
    assert.equal(JSON.parse(fs.readFileSync(credentials.CREDENTIALS_FILE, 'utf8')).guid, undefined);

    const appSource = fs.readFileSync(path.join(packageRoot, 'mcp', 'src', 'dashboard', 'app.js'), 'utf8');
    assert.match(appSource, /qiwei-\$\{workspaceId\}-accounts/);
    assert.match(appSource, /await initializeWorkspaceAccountStorage\(\);[\s\S]*if \(currentAccount\(\)\?\.uid\)/);
    assert.match(appSource, /addAccount\(account, \{ activate: false \}\)[\s\S]*await switchAccount\(accountId/);
    assert.match(appSource, /if \(!switched\)[\s\S]*state\.currentAccountId = previousAccountId/);
    assert.match(appSource, /statusCode === 4[\s\S]*restorePreviousAccountSelection\(\)/);

    process.stdout.write(`${JSON.stringify({
      status: 'ok',
      checks: 20,
      coverage: [
        'new_uid_does_not_reuse_old_guid',
        'verify_and_check_keep_uid_isolation',
        'successful_switch_persists_uid_guid',
        'guidless_switch_clears_stale_guid',
        'workspace_scoped_browser_accounts',
        'failed_or_cancelled_login_restores_previous_account',
      ],
    }, null, 2)}\n`);
  } finally {
    global.fetch = originalFetch;
    process.chdir(previousCwd);
    for (const key of Object.keys(process.env)) {
      if (!(key in previousEnv)) delete process.env[key];
    }
    for (const [key, value] of Object.entries(previousEnv)) process.env[key] = value;
    fs.rmSync(tempRoot, { recursive: true, force: true });
  }
}

main().catch(error => {
  process.stderr.write(`${error.stack || error.message}\n`);
  process.exitCode = 1;
});