/**
 * AriaEngine 二级索引查询测试
 * 全部 MemoryBackend，纯异步无定时器，不会卡死
 */
import { AriaEngine } from '../../src/engine/aria/index';
import { createSchema } from '../../src/table/schema';

describe('AriaEngine — 二级索引查询', () => {
  let engine: AriaEngine;

  beforeEach(async () => {
    engine = new AriaEngine({ storageBackend: 'memory' });
    await engine.open('idx-test', 1);
    await engine.createTable(createSchema('users', {
      id: { type: 'string', primaryKey: true },
      name: { type: 'string', index: true },
      age: { type: 'number', index: true },
      email: { type: 'string', unique: true },
    }));
    await engine.insert('users', [
      { id: '1', name: 'Alice', age: 30, email: 'a@t.com' },
      { id: '2', name: 'Bob', age: 25, email: 'b@t.com' },
      { id: '3', name: 'Charlie', age: 35, email: 'c@t.com' },
      { id: '4', name: 'Alice', age: 30, email: 'a2@t.com' },
    ]);
  });

  afterEach(async () => { await engine.close(); });

  it('索引 $eq 查询 — name 列', async () => {
    const rows = await engine.find('users', { table: 'users', where: { name: 'Alice' } });
    expect(rows).toHaveLength(2);
  });

  it('索引 $eq 查询 — age 列', async () => {
    const rows = await engine.find('users', { table: 'users', where: { age: 30 } });
    expect(rows).toHaveLength(2);
  });

  it('索引 $in 查询', async () => {
    const rows = await engine.find('users', { table: 'users', where: { age: { $in: [25, 35] } } });
    expect(rows).toHaveLength(2);
  });

  it('索引 $gt 查询', async () => {
    const rows = await engine.find('users', { table: 'users', where: { age: { $gt: 28 } } });
    expect(rows).toHaveLength(3);
  });

  it('索引 $lt 查询', async () => {
    const rows = await engine.find('users', { table: 'users', where: { age: { $lt: 30 } } });
    expect(rows).toHaveLength(1);
  });

  it('索引 $gte + $lte 范围', async () => {
    const rows = await engine.find('users', { table: 'users', where: { age: { $gte: 25, $lte: 30 } } });
    expect(rows).toHaveLength(3);
  });

  it('索引不存在的值返回空', async () => {
    const rows = await engine.find('users', { table: 'users', where: { name: 'Nobody' } });
    expect(rows).toHaveLength(0);
  });

  it('唯一索引 $eq 查询', async () => {
    const rows = await engine.find('users', { table: 'users', where: { email: 'a@t.com' } });
    expect(rows).toHaveLength(1);
    expect(rows[0].id).toBe('1');
  });

  it('PK 等值优先走主索引', async () => {
    const rows = await engine.find('users', { table: 'users', where: { id: '2' } });
    expect(rows).toHaveLength(1);
    expect(rows[0].name).toBe('Bob');
  });

  it('无索引列回退全表扫描', async () => {
    // email 是唯一索引但查询用了 $like（不支持索引）
    const rows = await engine.find('users', { table: 'users', where: { email: { $like: 'a%' } } });
    expect(rows).toHaveLength(2);
  });

  it('插入后索引立即可查', async () => {
    await engine.insert('users', [{ id: '5', name: 'Diana', age: 28, email: 'd@t.com' }]);
    const rows = await engine.find('users', { table: 'users', where: { name: 'Diana' } });
    expect(rows).toHaveLength(1);
  });

  it('删除后索引不再返回', async () => {
    await engine.delete('users', { table: 'users', where: { id: '1' } });
    const rows = await engine.find('users', { table: 'users', where: { name: 'Alice' } });
    expect(rows).toHaveLength(1);
    expect(rows[0].id).toBe('4');
  });

  it('更新后新旧索引均正确', async () => {
    await engine.update('users', { table: 'users', where: { id: '1' } }, { name: 'Alicia', age: 31 });
    const old = await engine.find('users', { table: 'users', where: { name: 'Alice' } });
    expect(old).toHaveLength(1);
    const updated = await engine.find('users', { table: 'users', where: { name: 'Alicia' } });
    expect(updated).toHaveLength(1);
    const byAge = await engine.find('users', { table: 'users', where: { age: 31 } });
    expect(byAge).toHaveLength(1);
  });
});