'use strict';

const assert = require('assert');
const fs = require('fs');
const path = require('path');
const vm = require('vm');

(async () => {
  const appSource = fs.readFileSync(path.join(__dirname, '..', 'public', 'app.js'), 'utf8');
  const indexSource = fs.readFileSync(path.join(__dirname, '..', 'public', 'index.html'), 'utf8');
  const objectUrls = new Map();
  const downloads = [];
  let objectUrlIndex = 0;
  let clipboardText = '';

  class TestBlob {
    constructor(parts, options = {}) {
      this.parts = parts;
      this.type = options.type || '';
    }
  }

  const context = vm.createContext({
    console, Set, Map, Date, JSON, Math, String, Number, Object, Array, RegExp, Promise, Uint8Array,
    setTimeout, clearTimeout,
    Blob: TestBlob,
    URL: {
      createObjectURL(blob) {
        const url = `blob:test/${++objectUrlIndex}`;
        objectUrls.set(url, blob);
        return url;
      },
      revokeObjectURL() {},
    },
    navigator: {
      clipboard: {
        async writeText(text) { clipboardText = text; },
      },
    },
    document: {
      createElement(tag) {
        if (tag === 'a') {
          return {
            href: '',
            download: '',
            click() {
              downloads.push({ filename: this.download, blob: objectUrls.get(this.href) });
            },
          };
        }
        return { value: '', select() {} };
      },
      body: { appendChild() {}, removeChild() {} },
      execCommand() { return true; },
    },
  });
  vm.runInContext(`${appSource}\nthis.__geminiApp = geminiApp;`, context, { filename: 'public/app.js' });

  const app = context.__geminiApp();
  assert.strictEqual(app.exportMode.csv, false, 'CSV导出默认应关闭');
  assert.strictEqual(app.exportFields.recharged_at, false, '充值时间导出默认应关闭');
  assert.strictEqual(app.exportFields.account_refund_status, false, '账号退款导出默认应关闭');
  assert.match(indexSource, /x-model="exportMode\.csv"[^>]*>\s*导出到 CSV/, '导出弹窗应显示CSV勾选项');
  assert.match(indexSource, /x-model="exportFields\.recharged_at"[^>]*>\s*充值时间/, '导出弹窗应显示充值时间勾选项');
  assert.match(indexSource, /x-model="exportFields\.account_refund_status"[^>]*>\s*账号退款/, '导出弹窗应显示账号退款勾选项');
  app.accounts = [{ email: 'reset@example.com' }];
  app.selectedEmails = new Set(['reset@example.com']);
  app.exportMode.csv = true;
  app.exportSelectedAccounts();
  assert.strictEqual(app.exportMode.csv, false, '每次重新打开导出弹窗都应恢复CSV默认状态');
  assert.strictEqual(app.exportMode.clipboard, true);

  const directCsv = app.buildExportCsv([
    { email: 'user@example.com', customer_name: 'A,客户', message: '第一行\n"第二行"' },
  ], ['email', 'customer_name', 'message']);
  assert.strictEqual(
    directCsv,
    '"邮箱","客户名","消息"\r\n"user@example.com","A,客户","第一行\n""第二行"""',
    'CSV应包含中文表头，并正确转义逗号、引号和换行',
  );
  const refundCsv = app.buildExportCsv([
    { email: 'refund@example.com', account_refund_status: 'gpt警告' },
  ], ['email', 'account_refund_status']);
  assert.strictEqual(
    refundCsv,
    '"邮箱","账号退款"\r\n"refund@example.com","gpt警告"',
    'CSV勾选账号退款后应导出当前退款状态',
  );

  const rawRechargeTime = '2026-08-22 05:51:48';
  const beijingRechargeTime = app.formatDate(rawRechargeTime);
  assert.match(beijingRechargeTime, /13:51:48/, '充值时间应转换为北京时间');
  const rechargeCsv = app.buildExportCsv([
    { email: 'paid@example.com', recharged_at: rawRechargeTime },
  ], ['email', 'recharged_at']);
  assert.strictEqual(
    rechargeCsv,
    `"邮箱","充值时间"\r\n"paid@example.com","${beijingRechargeTime}"`,
    'CSV勾选充值时间后应导出北京时间',
  );
  app.stagedBatchDetail = {
    batch: { selected_fields: ['email', 'recharged_at'] },
    accounts: [{ email: 'paid@example.com', recharged_at: rawRechargeTime }],
  };
  assert.strictEqual(
    app.stagedBatchText,
    `paid@example.com----${beijingRechargeTime}`,
    '暂存箱再次复制或下载时也应导出北京时间',
  );
  app.stagedBatchDetail = null;

  app._exportList = [{
    email: 'user@example.com',
    customer_name: 'A,客户',
    message: '第一行\n"第二行"',
  }];
  Object.keys(app.exportFields).forEach(key => { app.exportFields[key] = false; });
  ['email', 'customer_name', 'message', 'openai_auth_json'].forEach((key) => {
    app.exportFields[key] = true;
  });
  app.exportMode = { file: false, csv: true, clipboard: false, staging: false };
  app.showExportModal = true;
  const logs = [];
  app.addLog = (message, type) => logs.push({ message, type });
  let authLoadCount = 0;
  app.loadOpenAIAuthForExport = async (accounts) => {
    authLoadCount++;
    return {
      accounts: accounts.map(account => ({ ...account, openai_auth_json: '{"token":"x,y"}' })),
      missingCount: 0,
    };
  };

  await app.confirmExport();
  assert.strictEqual(authLoadCount, 1, '只选CSV时也必须加载授权JSON字段');
  assert.strictEqual(downloads.length, 1, '只选CSV时应触发一次下载');
  assert.match(downloads[0].filename, /^accounts_\d{4}-\d{2}-\d{2}\.csv$/);
  assert.strictEqual(downloads[0].blob.type, 'text/csv;charset=utf-8');
  assert.strictEqual(downloads[0].blob.parts[0], '\uFEFF', 'CSV应包含UTF-8 BOM');
  const downloadedCsv = downloads[0].blob.parts.join('').slice(1);
  assert.strictEqual(
    downloadedCsv,
    '"邮箱","客户名","消息","授权JSON"\r\n'
      + '"user@example.com","A,客户","第一行\n""第二行""","{""token"":""x,y""}"',
  );
  assert.strictEqual(clipboardText, '', '只选CSV时不应写入剪贴板');
  assert.strictEqual(app.showExportModal, false);
  assert.ok(logs.some(item => item.type === 'success' && /导出 1 个账号到 CSV/.test(item.message)));

  downloads.length = 0;
  authLoadCount = 0;
  app.showExportModal = true;
  app.exportMode = { file: true, csv: true, clipboard: false, staging: false };
  await app.confirmExport();
  assert.strictEqual(authLoadCount, 1, 'TXT和CSV同时导出时敏感字段只应加载一次');
  assert.deepStrictEqual(
    downloads.map(item => path.extname(item.filename)).sort(),
    ['.csv', '.txt'],
    'TXT与CSV可以同时勾选并分别下载',
  );

  console.log('account_csv_export.test.js: PASS');
})().catch(error => {
  console.error(error);
  process.exitCode = 1;
});