/**
 * 恢复 GroupChat.guid 字段并回填数据
 * 线上旧架构代码仍在使用 guid 做多租户隔离，误删除导致所有按 guid 查询的 SQL 报错 42703
 *
 * 用法: cd backend && npx tsx scripts/restore-guid-field.ts
 */
import 'dotenv/config';
import Parse from '../src/db/parse-client.js';

const GUID = process.env.QIWE_GUID || 'B8591A9D-B540-44F9-9D74-B2EF5B419EAA';

async function main(): Promise<void> {
  console.log(`=== 恢复 GroupChat.guid 字段 ===`);
  console.log(`GUID: ${GUID}\n`);

  // 1. 检查字段是否已存在
  const schemas = await Parse.Schema.all({ useMasterKey: true });
  const groupChatSchema = schemas.find((s: any) => s.className === 'GroupChat');
  if (!groupChatSchema) {
    console.error('❌ GroupChat 表不存在');
    process.exit(1);
  }

  const existingFields = Object.keys(groupChatSchema.fields).filter((k: string) => !k.startsWith('_'));
  console.log(`当前 GroupChat 字段: ${existingFields.join(', ')}`);

  if (existingFields.includes('guid')) {
    console.log('\n✅ guid 字段已存在，跳过 schema 更新');
  } else {
    // 2. 添加 guid 字段
    const schema = new Parse.Schema('GroupChat');
    schema.addField('guid', 'String');
    await schema.update({ useMasterKey: true });
    console.log('\n✅ 已添加 guid (String) 字段到 GroupChat');
  }

  // 3. 回填所有缺少 guid 的记录
  console.log('\n开始回填数据...');
  const q = new Parse.Query('GroupChat');
  q.doesNotExist('guid');
  q.limit(500);
  const groups = await q.find({ useMasterKey: true });

  console.log(`找到 ${groups.length} 条缺少 guid 的记录`);

  if (groups.length > 0) {
    const toSave: Parse.Object[] = [];
    for (const g of groups) {
      g.set('guid', GUID);
      toSave.push(g);
    }
    // 分批保存
    for (let i = 0; i < toSave.length; i += 100) {
      const batch = toSave.slice(i, i + 100);
      await Parse.Object.saveAll(batch, { useMasterKey: true });
      console.log(`  已回填 ${Math.min(i + 100, toSave.length)}/${toSave.length}`);
    }
  }

  // 4. 验证
  const verifyQ = new Parse.Query('GroupChat');
  verifyQ.equalTo('guid', GUID);
  verifyQ.limit(1);
  const test = await verifyQ.first({ useMasterKey: true });
  if (test) {
    console.log(`\n✅ 验证通过: 成功查询到 guid='${GUID}' 的记录 (roomId=${test.get('roomId')})`);
  } else {
    console.log('\n⚠️ 验证失败: 未查询到匹配记录');
  }

  console.log('\n✅ 恢复完成!');
}

main().catch((err) => {
  console.error('❌ 失败:', err);
  process.exit(1);
});