/**
 * v0.8.0 回归套件 —— B-3 单管线（SQL 只有一条执行路径）
 * ============================================================================
 * 修复前每个 QueryBuilder 的 `execute()` 都有自己的执行动作：
 *   - `SelectQueryBuilder`：**无 JOIN 时直接调 `engine.find`**，只有 JOIN 走 executor；
 *   - `UpdateQueryBuilder` / `DeleteQueryBuilder`：直接调 `engine.update/delete`。
 *
 * 于是 TABLE API（`db.table('t').select()...`）与 SQL API（`db.query()`）是两条管线，
 * 规则各写一份。本套件锁定"两条入口必须逐值等价"这一不变量 —— 任何一侧将来
 * 自行加逻辑（如自己处理投影、自己下推 LIMIT），下面的断言就会失败。
 */
import { MetonaSqlark } from '../src/core';
import { rows as rowsOf } from './helpers/assertions';
import type { DatabaseConfig } from '../src/constants';

const ENGINES: Array<[string, DatabaseConfig['mode'], Partial<DatabaseConfig>]> = [
  ['memory', 'memory', {}],
  ['disk', 'disk', {}],
  ['hybrid', 'hybrid', {}],
  ['aria', 'aria', { diskEngine: 'memory' }],
];

describe('[v0.8.0] B-3 单管线：TABLE API 与 SQL API 逐值等价', () => {
  describe.each(ENGINES)('%s 引擎', (label, mode, extra) => {
    let db: MetonaSqlark;

    beforeEach(async () => {
      db = await MetonaSqlark.create({
        name: `b3-${label}-${Math.random().toString(36).slice(2)}`,
        mode,
        ...extra,
      });
      await db.defineTable('t', {
        id: { type: 'string', primaryKey: true },
        g: { type: 'string' },
        n: { type: 'number' },
      });
      await db.query("INSERT INTO t VALUES ('1','a',10),('2','a',20),('3','b',30),('4','b',40)");
    });

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

    // -------------------------------------------------------------------
    //  SELECT：直通路径此前缺少的阶段
    // -------------------------------------------------------------------

    it('SELECT 带表前缀的列：两条入口输出键相同', async () => {
      // 修复前 builder 直通 engine.find，行键保留 `t.n`；SQL 路径归一化为 `n`
      const viaBuilder = rowsOf<Record<string, unknown>>(
        await db.table('t').select(['t.id', 't.n']).execute(),
      );
      const viaSql = rowsOf<Record<string, unknown>>(await db.query('SELECT t.id, t.n FROM t'));
      expect(viaBuilder).toHaveLength(4);
      expect(Object.keys(viaBuilder[0]).sort()).toEqual(Object.keys(viaSql[0]).sort());
      expect(viaBuilder).toEqual(expect.arrayContaining(viaSql));
    });

    it('SELECT 列别名：两条入口一致', async () => {
      const viaBuilder = rowsOf<Record<string, unknown>>(
        await db.table('t').select(['id AS ident']).execute(),
      );
      const viaSql = rowsOf<Record<string, unknown>>(await db.query('SELECT id AS ident FROM t'));
      expect(viaBuilder).toEqual(viaSql);
    });

    it('SELECT 未知列：两条入口都抛 COLUMN_NOT_FOUND', async () => {
      // 修复前 builder 直通引擎：引擎不校验列是否存在 → 静默产出 `[{}, {}, {}, {}]`
      await expect(db.table('t').select(['nope']).execute()).rejects.toMatchObject({
        code: 'COLUMN_NOT_FOUND',
      });
      await expect(db.query('SELECT nope FROM t')).rejects.toMatchObject({
        code: 'COLUMN_NOT_FOUND',
      });
    });

    it('SELECT LIMIT/OFFSET：两条入口切片一致（不双重截断）', async () => {
      const viaBuilder = rowsOf<Record<string, unknown>>(
        await db.table('t').select(['id']).orderBy('id').limit(2).offset(1).execute(),
      );
      const viaSql = rowsOf<Record<string, unknown>>(
        await db.query('SELECT id FROM t ORDER BY id LIMIT 2 OFFSET 1'),
      );
      expect(viaBuilder).toEqual([{ id: '2' }, { id: '3' }]);
      expect(viaBuilder).toEqual(viaSql);
    });

    it('SELECT 常量列：两条入口一致', async () => {
      const viaBuilder = rowsOf<Record<string, unknown>>(
        await db.table('t').select(['id', '1 AS one']).limit(1).execute(),
      );
      expect(viaBuilder).toEqual([{ id: '1', one: 1 }]);
    });

    // -------------------------------------------------------------------
    //  UPDATE / DELETE：此前完全绕过 Executor
    // -------------------------------------------------------------------

    it('UPDATE 带真实子查询 WHERE：TABLE API 正确解析（此前静默 0 行）', async () => {
      // 修复前：builder 把 `{ $subquery: ... }` 直接交给 engine.update，引擎层无人
      // 解析 → matchWhere 判 UNKNOWN → **返回 0 且不报错**（用户以为没有匹配行）。
      await db.defineTable('u', { id: { type: 'string', primaryKey: true } });
      await db.query("INSERT INTO u VALUES ('1'),('2')");

      const affected = await db
        .table('t')
        .update({ g: 'z' })
        .where({ id: { $in: { $subquery: { type: 'SELECT', columns: ['id'], from: 'u', where: {} } } } as never })
        .execute();

      expect(affected).toBe(2);
      const rows = rowsOf<Record<string, unknown>>(await db.query('SELECT id, g FROM t ORDER BY id'));
      expect(rows).toEqual([
        { id: '1', g: 'z' },
        { id: '2', g: 'z' },
        { id: '3', g: 'b' },
        { id: '4', g: 'b' },
      ]);
    });

    it('DELETE 带真实子查询 WHERE：TABLE API 正确解析（此前静默 0 行）', async () => {
      await db.defineTable('u', { id: { type: 'string', primaryKey: true } });
      await db.query("INSERT INTO u VALUES ('1'),('2')");

      const affected = await db
        .table('t')
        .delete()
        .where({ id: { $in: { $subquery: { type: 'SELECT', columns: ['id'], from: 'u', where: {} } } } as never })
        .execute();

      expect(affected).toBe(2);
      expect(rowsOf(await db.query('SELECT id FROM t ORDER BY id'))).toEqual([
        { id: '3' },
        { id: '4' },
      ]);
    });

    it('UPDATE 基础路径：两条入口影响行数一致', async () => {
      const viaSql = await db.query("UPDATE t SET g = 'x' WHERE n > 15");
      const sb = rowsOf(await db.query("SELECT id FROM t WHERE g = 'x' ORDER BY id"));
      expect(viaSql).toBe(3);
      expect(sb).toEqual([{ id: '2' }, { id: '3' }, { id: '4' }]);

      const viaBuilder = await db.table('t').update({ g: 'y' }).where({ n: { $gt: 15 } }).execute();
      expect(viaBuilder).toBe(3);
      expect(rowsOf(await db.query("SELECT id FROM t WHERE g = 'y' ORDER BY id"))).toEqual(sb);
    });

    it('DELETE 基础路径：两条入口影响行数一致', async () => {
      const viaBuilder = await db.table('t').delete().where({ n: { $gt: 15 } }).execute();
      expect(viaBuilder).toBe(3);
      // 剩余行按 SELECT id 投影（SQL 路径只返回 id —— 两条入口的投影也一致）
      expect(rowsOf(await db.query('SELECT id FROM t'))).toEqual([{ id: '1' }]);
    });

    it('UPDATE 未知列：两条入口都抛 COLUMN_NOT_FOUND', async () => {
      await expect(
        db.table('t').update({ nope: 1 } as never).where({ id: '1' }).execute(),
      ).rejects.toMatchObject({ code: 'COLUMN_NOT_FOUND' });
    });

    it('UPDATE 违反 maxLength：两条入口都抛 VALIDATION_ERROR', async () => {
      await db.defineTable('u', {
        id: { type: 'string', primaryKey: true },
        name: { type: 'string', maxLength: 3 },
      });
      await db.query("INSERT INTO u VALUES ('1', 'abc')");
      await expect(
        db.table('u').update({ name: 'abcd' } as never).where({ id: '1' }).execute(),
      ).rejects.toMatchObject({ code: 'VALIDATION_ERROR' });
    });

    // -------------------------------------------------------------------
    //  生命周期钩子仍在（且拿到真实 where）
    // -------------------------------------------------------------------

    it('TABLE API 写操作的钩子仍触发，且 before 拿到真实 where', async () => {
      const seen: string[] = [];
      db.on('beforeUpdate', (query) => {
        seen.push(`before:${JSON.stringify((query as { where: unknown }).where)}`);
      });
      db.on('afterUpdate', (_query, _updates, count) => { seen.push(`after:${String(count)}`); });

      await db.table('t').update({ g: 'q' }).where({ n: { $gt: 15 } }).execute();
      // 关键：before 的 where 必须是 builder 上累积的条件，
      // 而不是构造 builder 时的空对象（否则钩子拿不到过滤条件）
      expect(seen).toEqual(['before:{"n":{"$gt":15}}', 'after:3']);
    });

    it('TABLE API 删除的钩子仍触发，且 before 拿到真实 where', async () => {
      const seen: string[] = [];
      db.on('beforeDelete', (query) => {
        seen.push(`before:${JSON.stringify((query as { where: unknown }).where)}`);
      });
      db.on('afterDelete', (_query, count) => { seen.push(`after:${String(count)}`); });

      await db.table('t').delete().where({ id: '1' }).execute();
      expect(seen).toEqual(['before:{"id":"1"}', 'after:1']);
    });

    // -------------------------------------------------------------------
    //  maxRowsPerQuery 与列校验也覆盖 TABLE API
    // -------------------------------------------------------------------

    it('TABLE API 的 SELECT 同样受 maxRowsPerQuery 约束', async () => {
      const limited = rowsOf(await db.table('t').select(['id']).execute());
      // 本引擎默认不限（maxRowsPerQuery 0），此处只验证两条入口结果一致
      const viaSql = rowsOf(await db.query('SELECT id FROM t'));
      expect(limited).toEqual(viaSql);
    });
  });
});

describe('[v0.8.0] B-3 单管线：maxRowsPerQuery 对两条入口一致', () => {
  it('TABLE API 与 SQL 都被截断到同一行数', async () => {
    const db = await MetonaSqlark.create({ name: 'b3-maxrows', mode: 'memory', maxRowsPerQuery: 2 });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true } });
    await db.query("INSERT INTO t VALUES ('1'),('2')");
    await db.query("INSERT INTO t VALUES ('3')");

    const viaSql = rowsOf(await db.query('SELECT id FROM t'));
    const viaBuilder = rowsOf(await db.table('t').select(['id']).execute());
    // 修复前 builder 直通引擎、不受 maxRowsPerQuery 约束 → 返回 3 行
    expect(viaBuilder).toHaveLength(2);
    expect(viaBuilder).toEqual(viaSql);
    await db.close();
  });
});