// 已读取AGENTS.md
import * as fs from 'fs';
import * as path from 'path';

/**
 * 第六十八批回归闸门：列表有界 + 高频查询索引
 */
describe('第六十八批分页与索引闸门', () => {
  const rootDir = path.resolve(__dirname, '../../');
  const repoCode = fs.readFileSync(path.join(rootDir, 'server/src/db/repository.ts'), 'utf-8');
  const mysqlCode = fs.readFileSync(path.join(rootDir, 'server/src/db/mysql.ts'), 'utf-8');

  it('大列表查询必须有上限（避免全表下发）', () => {
    expect(repoCode).toContain("sql += ' ORDER BY id ASC LIMIT 500'");
    expect(repoCode).toContain("sql += ' ORDER BY is_top DESC, created_at DESC LIMIT 200'");
    expect(repoCode).toContain("sql += ' ORDER BY created_at DESC LIMIT 200'");
    // 管理端财务流水
    expect(repoCode).toContain('LIMIT 500');
  });

  it('提供高频查询索引（幂等）', () => {
    expect(mysqlCode).toContain('idx_orders_buyer');
    expect(mysqlCode).toContain('idx_orders_status_created');
    expect(mysqlCode).toContain('idx_fin_user');
    expect(mysqlCode).toContain('idx_users_phone');
    expect(mysqlCode).toContain('idx_pr_order');
    // 索引创建必须在所有建表之后，避免表不存在
    const createIdx = mysqlCode.indexOf('const indexDefs');
    const seedCall = mysqlCode.indexOf('await seedInitialDataIfEmpty(conn)');
    expect(createIdx).toBeGreaterThan(-1);
    expect(seedCall).toBeGreaterThan(createIdx);
  });

  it('expert_services 懒建表后补索引', () => {
    expect(repoCode).toContain('ALTER TABLE expert_services ADD INDEX idx_srv_expert');
  });
});