/**
 * v0.7.2 修复回归测试
 *
 * 覆盖：
 * - UPDATE 语句级原子性（多行更新撞唯一约束 → 整句拒绝，四引擎）
 * - 批内唯一互查（两行同时更新到同一新唯一值 → 整句拒绝）
 * - 事务内 DDL 拒绝（ALTER TABLE / CREATE INDEX / DROP INDEX，Memory/KVStore 对齐 Aria）
 * - SET NULL 级联撞 required 列 → FOREIGN_KEY_VIOLATION（delete 与 update 主键变更，Memory/Aria）
 * - bindParameters 注释感知（行注释 / 块注释中的 ? 与引号不参与绑定）
 * - 未闭合字符串字面量 → PARSE_ERROR
 * - 未知 where 操作符 → QUERY_ERROR（不再静默全匹配）
 * - UPDATE undefined 值语义化（保留旧值，不再删除列）
 * - Hybrid 磁盘写失败补偿（内存对齐磁盘状态）
 */

import { MetonaSqlark } from '../src/core';
import { parse } from '../src/sql/parser';
import { bindParameters } from '../src/sql/params';
import { matchWhere } from '../src/query/where-matcher';
import { MemoryEngine } from '../src/engine/memory';
import { KVStoreEngine } from '../src/engine/kvstore_engine';
import { HybridEngine } from '../src/hybrid/index';
import { createSchema } from '../src/table/schema';

function uniqueDB(): string {
  return `v072-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
}

// ===================================================================
//  UPDATE 语句级原子性
// ===================================================================

describe('v0.7.2 — UPDATE 语句级原子性', () => {
  const modes = ['memory', 'disk', 'hybrid', 'aria'] as const;

  for (const mode of modes) {
    it(`${mode}: 多行更新撞唯一约束 → 整句拒绝、数据不变`, async () => {
      const db = await MetonaSqlark.create({ name: uniqueDB(), mode, diskEngine: 'memory' });
      await db.defineTable('t', {
        id: { type: 'string', primaryKey: true },
        email: { type: 'string', unique: true },
      });
      await db.table('t').insertMany([
        { id: 'a', email: 'a@x.com' },
        { id: 'b', email: 'b@x.com' },
        { id: 'c', email: 'c@x.com' },
      ]);
      await db.table('t').update({ email: 'z@x.com' }).where({ id: 'a' }).execute();

      // 一条语句同时把 b、c 改成 a 已占用的 z@x.com：b 成功改到一半，c 撞唯一
      await expect(
        db.table('t').update({ email: 'z@x.com' }).where({ id: 'c' }).execute(),
      ).rejects.toThrow(); // 单行冲突

      // 关键场景：无 where 全表更新到同一值 → 第二行即冲突
      await expect(
        db.table('t').update({ email: 'y@x.com' }).execute(),
      ).rejects.toMatchObject({ code: 'UNIQUE_VIOLATION' });

      // 整句拒绝：任何行都不该被改成 y@x.com
      const rows = await db.query('SELECT id, email FROM t ORDER BY id') as Record<string, unknown>[];
      expect(rows).toEqual([
        { id: 'a', email: 'z@x.com' },
        { id: 'b', email: 'b@x.com' },
        { id: 'c', email: 'c@x.com' },
      ]);
      await db.close();
    });
  }

  it('memory: 校验失败（required 置 null）也整句拒绝', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('t', {
      id: { type: 'string', primaryKey: true },
      name: { type: 'string', required: true },
    });
    await db.table('t').insertMany([
      { id: '1', name: 'A' },
      { id: '2', name: 'B' },
    ]);
    await expect(
      db.table('t').update({ name: null }).execute(),
    ).rejects.toMatchObject({ code: 'VALIDATION_ERROR' });
    const rows = await db.query('SELECT * FROM t ORDER BY id') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: '1', name: 'A' }, { id: '2', name: 'B' }]);
    await db.close();
  });

  it('aria: 主键变更撞已有主键整句拒绝（含 WAL 一致性）', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'aria', diskEngine: 'memory' });
    await db.defineTable('t', {
      id: { type: 'string', primaryKey: true },
      n: { type: 'number' },
    });
    await db.table('t').insertMany([
      { id: 'a', n: 1 }, { id: 'b', n: 2 }, { id: 'c', n: 3 },
    ]);
    // a → c 撞已有 c；且 d 行的更新（同语句）也不得生效
    await expect(
      db.table('t').update({ id: 'c' }).where({ id: 'a' }).execute(),
    ).rejects.toMatchObject({ code: 'DUPLICATE_KEY' });
    const rows = await db.query('SELECT * FROM t ORDER BY id') as Record<string, unknown>[];
    expect(rows.map((r) => r.id)).toEqual(['a', 'b', 'c']);
    await db.close();
  });
});

// ===================================================================
//  批内唯一互查
// ===================================================================

describe('v0.7.2 — 批内唯一互查', () => {
  it('两行同时更新到同一新唯一值 → 整句拒绝（memory）', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('t', {
      id: { type: 'string', primaryKey: true },
      email: { type: 'string', unique: true },
    });
    await db.table('t').insertMany([
      { id: 'a', email: 'a@x.com' },
      { id: 'b', email: 'b@x.com' },
    ]);
    await expect(
      db.table('t').update({ email: 'z@x.com' }).execute(),
    ).rejects.toMatchObject({ code: 'UNIQUE_VIOLATION' });
    const rows = await db.query('SELECT email FROM t ORDER BY id') as Record<string, unknown>[];
    expect(rows).toEqual([{ email: 'a@x.com' }, { email: 'b@x.com' }]);
    await db.close();
  });

  it('两行同时更新到同一新唯一值 → 整句拒绝（aria）', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'aria', diskEngine: 'memory' });
    await db.defineTable('t', {
      id: { type: 'string', primaryKey: true },
      email: { type: 'string', unique: true },
    });
    await db.table('t').insertMany([
      { id: 'a', email: 'a@x.com' },
      { id: 'b', email: 'b@x.com' },
    ]);
    await expect(
      db.table('t').update({ email: 'z@x.com' }).execute(),
    ).rejects.toMatchObject({ code: 'UNIQUE_VIOLATION' });
    const rows = await db.query('SELECT email FROM t ORDER BY id') as Record<string, unknown>[];
    expect(rows).toEqual([{ email: 'a@x.com' }, { email: 'b@x.com' }]);
    await db.close();
  });

  it('唯一值不变时更新自身不误报（回归）', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('t', {
      id: { type: 'string', primaryKey: true },
      email: { type: 'string', unique: true },
      name: { type: 'string' },
    });
    await db.table('t').insertMany([
      { id: 'a', email: 'a@x.com', name: 'A' },
    ]);
    const n = await db.table('t').update({ name: 'A2', email: 'a@x.com' }).execute();
    expect(n).toBe(1);
    const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
    expect(rows[0].name).toBe('A2');
    await db.close();
  });
});

// ===================================================================
//  事务内 DDL 拒绝
// ===================================================================

describe('v0.7.2 — 事务内 DDL 拒绝（三引擎一致）', () => {
  it('memory: 事务内 ALTER TABLE 抛 NOT_SUPPORTED，事务可继续提交', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true }, a: { type: 'number' } });
    await db.query('BEGIN');
    await db.query("INSERT INTO t VALUES ('1', 10)");
    await expect(db.query('ALTER TABLE t ADD COLUMN b STRING')).rejects.toMatchObject({ code: 'NOT_SUPPORTED' });
    await db.query('COMMIT');
    const schema = await db.getEngine().getTableSchema('t');
    expect('b' in (schema!.columns)).toBe(false);
    const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: '1', a: 10 }]);
    await db.close();
  });

  it('memory: ROLLBACK 后无 DDL 残留', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true } });
    await db.query('BEGIN');
    await expect(db.query('ALTER TABLE t ADD COLUMN b STRING')).rejects.toMatchObject({ code: 'NOT_SUPPORTED' });
    await db.query('ROLLBACK');
    const schema = await db.getEngine().getTableSchema('t');
    expect(Object.keys(schema!.columns)).toEqual(['id']);
    await db.close();
  });

  it('kv: 事务内 ALTER TABLE 抛 NOT_SUPPORTED', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'disk', diskEngine: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true } });
    await db.query('BEGIN');
    await expect(db.query('ALTER TABLE t ADD COLUMN b STRING')).rejects.toMatchObject({ code: 'NOT_SUPPORTED' });
    await db.query('ROLLBACK');
    const schema = await db.getEngine().getTableSchema('t');
    expect(Object.keys(schema!.columns)).toEqual(['id']);
    await db.close();
  });

  it('kv: 事务内 CREATE INDEX / DROP INDEX 抛 NOT_SUPPORTED', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'disk', diskEngine: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true }, v: { type: 'number' } });
    await db.query('BEGIN');
    await expect(db.query('CREATE INDEX idx_v ON t (v)')).rejects.toMatchObject({ code: 'NOT_SUPPORTED' });
    await db.query('ROLLBACK');
    const schema = await db.getEngine().getTableSchema('t');
    expect(schema!.columns.v.index).toBeFalsy();
    await db.close();
  });

  it('memory: 事务内 createTable/dropTable 仍可回滚（既有行为保持）', async () => {
    const eng = new MemoryEngine();
    await eng.open(uniqueDB(), 1);
    await eng.createTable(createSchema('t', { id: { type: 'string', primaryKey: true } }));
    await eng.beginTransaction();
    await eng.createTable(createSchema('tmp', { id: { type: 'string', primaryKey: true } }));
    await eng.rollbackTransaction();
    expect(await eng.hasTable('tmp')).toBe(false);
    expect(await eng.hasTable('t')).toBe(true);
    await eng.close();
  });

  it('hybrid: 事务内 ALTER TABLE 抛 NOT_SUPPORTED（内存层拒绝）', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'hybrid', diskEngine: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true } });
    await db.query('BEGIN');
    await expect(db.query('ALTER TABLE t ADD COLUMN b STRING')).rejects.toMatchObject({ code: 'NOT_SUPPORTED' });
    await db.query('ROLLBACK');
    const schema = await db.getEngine().getTableSchema('t');
    expect(Object.keys(schema!.columns)).toEqual(['id']);
    await db.close();
  });
});

// ===================================================================
//  SET NULL 级联撞 required 列
// ===================================================================

describe('v0.7.2 — SET NULL 级联撞 required 列', () => {
  it('memory: delete 级联 SET NULL 到 required 列 → FOREIGN_KEY_VIOLATION', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('parent', { id: { type: 'string', primaryKey: true } });
    await db.defineTable('child', {
      id: { type: 'string', primaryKey: true },
      pid: { type: 'string', required: true, references: 'parent.id', onDelete: 'SET NULL' },
    });
    await db.query("INSERT INTO parent VALUES ('p1')");
    await db.query("INSERT INTO child VALUES ('c1', 'p1')");
    await expect(db.query("DELETE FROM parent WHERE id = 'p1'")).rejects.toMatchObject({ code: 'FOREIGN_KEY_VIOLATION' });
    // 整体拒绝：父行仍在
    const rows = await db.query('SELECT * FROM parent') as Record<string, unknown>[];
    expect(rows).toHaveLength(1);
    await db.close();
  });

  it('aria: delete 级联 SET NULL 到 required 列 → FOREIGN_KEY_VIOLATION', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'aria', diskEngine: 'memory' });
    await db.defineTable('parent', { id: { type: 'string', primaryKey: true } });
    await db.defineTable('child', {
      id: { type: 'string', primaryKey: true },
      pid: { type: 'string', required: true, references: 'parent.id', onDelete: 'SET NULL' },
    });
    await db.query("INSERT INTO parent VALUES ('p1')");
    await db.query("INSERT INTO child VALUES ('c1', 'p1')");
    await expect(db.query("DELETE FROM parent WHERE id = 'p1'")).rejects.toMatchObject({ code: 'FOREIGN_KEY_VIOLATION' });
    const rows = await db.query('SELECT * FROM parent') as Record<string, unknown>[];
    expect(rows).toHaveLength(1);
    await db.close();
  });

  it('memory: update 主键变更 SET NULL 到 required 列 → 整体拒绝', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('parent', { id: { type: 'string', primaryKey: true } });
    await db.defineTable('child', {
      id: { type: 'string', primaryKey: true },
      pid: { type: 'string', required: true, references: 'parent.id', onUpdate: 'SET NULL' },
    });
    await db.query("INSERT INTO parent VALUES ('p1')");
    await db.query("INSERT INTO child VALUES ('c1', 'p1')");
    await expect(
      db.table('parent').update({ id: 'p2' }).where({ id: 'p1' }).execute(),
    ).rejects.toMatchObject({ code: 'FOREIGN_KEY_VIOLATION' });
    const rows = await db.query('SELECT * FROM parent') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: 'p1' }]);
    await db.close();
  });

  it('aria: update 主键变更 SET NULL 到 required 列 → 整体拒绝', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'aria', diskEngine: 'memory' });
    await db.defineTable('parent', { id: { type: 'string', primaryKey: true } });
    await db.defineTable('child', {
      id: { type: 'string', primaryKey: true },
      pid: { type: 'string', required: true, references: 'parent.id', onUpdate: 'SET NULL' },
    });
    await db.query("INSERT INTO parent VALUES ('p1')");
    await db.query("INSERT INTO child VALUES ('c1', 'p1')");
    await expect(
      db.table('parent').update({ id: 'p2' }).where({ id: 'p1' }).execute(),
    ).rejects.toMatchObject({ code: 'FOREIGN_KEY_VIOLATION' });
    const rows = await db.query('SELECT * FROM parent') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: 'p1' }]);
    await db.close();
  });

  it('SET NULL 到非 required 列仍正常（回归）', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('parent', { id: { type: 'string', primaryKey: true } });
    await db.defineTable('child', {
      id: { type: 'string', primaryKey: true },
      pid: { type: 'string', references: 'parent.id', onDelete: 'SET NULL' },
    });
    await db.query("INSERT INTO parent VALUES ('p1')");
    await db.query("INSERT INTO child VALUES ('c1', 'p1')");
    await db.query("DELETE FROM parent WHERE id = 'p1'");
    const rows = await db.query('SELECT * FROM child') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: 'c1', pid: null }]);
    await db.close();
  });
});

// ===================================================================
//  bindParameters 注释感知
// ===================================================================

describe('v0.7.2 — bindParameters 注释感知', () => {
  it('行注释中的 ? 不参与占位符', () => {
    const sql = "SELECT * FROM t -- comment with ? inside\n WHERE id = ?";
    const bound = bindParameters(sql, ['1']);
    expect(bound).toContain('comment with ? inside');
    expect(bound).toContain("WHERE id = '1'");
  });

  it('块注释中的 ? 不参与占位符', () => {
    const sql = 'SELECT * FROM t /* c ? c */ WHERE id = ?';
    const bound = bindParameters(sql, ['1']);
    expect(bound).toContain('/* c ? c */');
    expect(bound).toContain("WHERE id = '1'");
  });

  it("行注释中的单引号不触发未闭合字符串（-- don't）", () => {
    const sql = "SELECT * FROM t WHERE id = ? -- don't touch";
    const bound = bindParameters(sql, ['1']);
    expect(bound).toContain("-- don't touch");
  });

  it('块注释中的单引号不触发未闭合字符串', () => {
    const sql = "SELECT * FROM t /* it's fine */ WHERE id = ?";
    const bound = bindParameters(sql, ['1']);
    expect(bound).toContain("/* it's fine */");
  });

  it('占位符数量按注释外计算（注释里两个 ? 不报参数不足）', () => {
    const sql = "SELECT * FROM t WHERE id = ? /* ? ? */ AND x = ? -- ?\n";
    const bound = bindParameters(sql, ['1', '2']);
    expect(bound).toContain("'1'");
    expect(bound).toContain("'2'");
  });

  it('SQL 注入载荷仍被安全编码（回归）', () => {
    const sql = 'SELECT * FROM t WHERE name = ?';
    const bound = bindParameters(sql, ["O'Brien'; DROP TABLE t; --"]);
    expect(bound).toContain("'O''Brien''; DROP TABLE t; --'");
  });
});

// ===================================================================
//  未闭合字符串字面量
// ===================================================================

describe('v0.7.2 — 未闭合字符串字面量', () => {
  it("SELECT 'abc → PARSE_ERROR", () => {
    expect(() => parse("SELECT 'abc")).toThrowError(/Unterminated string/);
  });

  it('query API 同样抛 PARSE_ERROR', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await expect(db.query("SELECT 'abc")).rejects.toMatchObject({ code: 'PARSE_ERROR' });
    await db.close();
  });
});

// ===================================================================
//  未知 where 操作符
// ===================================================================

describe('v0.7.2 — 未知 where 操作符抛错', () => {
  it('$between 未实现 → QUERY_ERROR（不再静默全匹配）', () => {
    expect(() => matchWhere({ age: 3 }, { age: { $between: [1, 2] } } as never)).toThrowError(/Unknown where operator/);
  });

  it('query API 路径同样报错', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true } });
    await db.query("INSERT INTO t VALUES ('1')");
    await expect(
      db.getEngine().find('t', { table: 't', where: { id: { $betwen: '1' } } as never }),
    ).rejects.toThrowError(/Unknown where operator/);
    await db.close();
  });
});

// ===================================================================
//  UPDATE undefined 语义化
// ===================================================================

describe('v0.7.2 — UPDATE undefined 语义化', () => {
  const modes = ['memory', 'disk', 'hybrid', 'aria'] as const;

  for (const mode of modes) {
    it(`${mode}: update({ col: undefined }) 保留旧值`, async () => {
      const db = await MetonaSqlark.create({ name: uniqueDB(), mode, diskEngine: 'memory' });
      await db.defineTable('t', {
        id: { type: 'string', primaryKey: true },
        tag: { type: 'string', default: 'def' },
      });
      await db.query("INSERT INTO t VALUES ('1', 'x')");
      await db.table('t').update({ tag: undefined }).where({ id: '1' }).execute();
      const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
      expect(rows[0]).toEqual({ id: '1', tag: 'x' });
      await db.close();
    });

    it(`${mode}: update({ col: null }) 仍显式置空`, async () => {
      const db = await MetonaSqlark.create({ name: uniqueDB(), mode, diskEngine: 'memory' });
      await db.defineTable('t', {
        id: { type: 'string', primaryKey: true },
        tag: { type: 'string' },
      });
      await db.query("INSERT INTO t VALUES ('1', 'x')");
      await db.table('t').update({ tag: null }).where({ id: '1' }).execute();
      const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
      expect(rows[0]).toEqual({ id: '1', tag: null });
      await db.close();
    });
  }

  it('主键 undefined 不触发主键变更路径（kv 引擎）', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'disk', diskEngine: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true }, n: { type: 'number' } });
    await db.query("INSERT INTO t VALUES ('1', 1)");
    const n = await db.table('t').update({ id: undefined, n: 2 }).where({ id: '1' }).execute();
    expect(n).toBe(1);
    const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
    expect(rows[0]).toEqual({ id: '1', n: 2 });
    await db.close();
  });
});

// ===================================================================
//  Hybrid 磁盘写失败补偿
// ===================================================================

describe('v0.7.2 — Hybrid 磁盘写失败补偿', () => {
  it('insert 磁盘失败 → 错误抛出 + 内存与磁盘一致', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'hybrid', diskEngine: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true } });
    await db.query("INSERT INTO t VALUES ('1')");

    const eng = db.getEngine() as HybridEngine;
    const disk = (eng as unknown as { diskEngine: IStorageEngineMock }).diskEngine;
    const origInsert = disk.insert.bind(disk);
    let fail = true;
    disk.insert = async (table: string, rows: Record<string, unknown>[]) => {
      if (fail) throw new Error('disk down');
      return origInsert(table, rows);
    };

    await expect(db.query("INSERT INTO t VALUES ('2')")).rejects.toThrow('disk down');
    // 内存已对齐磁盘：'2' 不在（补偿后重载）
    const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: '1' }]);

    // 恢复后正常写入
    fail = false;
    await db.query("INSERT INTO t VALUES ('3')");
    const rows2 = await db.query('SELECT * FROM t ORDER BY id') as Record<string, unknown>[];
    expect(rows2).toEqual([{ id: '1' }, { id: '3' }]);
    await db.close();
  });

  it('update 磁盘失败 → 错误抛出 + 内存对齐磁盘', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'hybrid', diskEngine: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true }, n: { type: 'number' } });
    await db.query("INSERT INTO t VALUES ('1', 1)");

    const eng = db.getEngine() as HybridEngine;
    const disk = (eng as unknown as { diskEngine: IStorageEngineMock }).diskEngine;
    disk.update = async () => { throw new Error('disk down'); };

    await expect(db.table('t').update({ n: 99 }).where({ id: '1' }).execute()).rejects.toThrow('disk down');
    const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: '1', n: 1 }]);
    await db.close();
  });

  it('delete 磁盘失败 → 错误抛出 + 内存对齐磁盘', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'hybrid', diskEngine: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true } });
    await db.query("INSERT INTO t VALUES ('1')");

    const eng = db.getEngine() as HybridEngine;
    const disk = (eng as unknown as { diskEngine: IStorageEngineMock }).diskEngine;
    disk.delete = async () => { throw new Error('disk down'); };

    await expect(db.table('t').delete().where({ id: '1' }).execute()).rejects.toThrow('disk down');
    const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: '1' }]);
    await db.close();
  });

  it('事务内写失败仍由快照回滚（补偿不影响事务路径）', async () => {
    const db = await MetonaSqlark.create({ name: uniqueDB(), mode: 'hybrid', diskEngine: 'memory' });
    await db.defineTable('t', { id: { type: 'string', primaryKey: true } });
    await db.query("INSERT INTO t VALUES ('1')");
    await expect(db.transaction(async (trx) => {
      await trx.table('t').insert({ id: '2' });
      throw new Error('tx fail');
    })).rejects.toThrow('tx fail');
    const rows = await db.query('SELECT * FROM t') as Record<string, unknown>[];
    expect(rows).toEqual([{ id: '1' }]);
    await db.close();
  });
});

interface IStorageEngineMock {
  insert: (table: string, rows: Record<string, unknown>[]) => Promise<string[]>;
  update: (table: string, query: never, updates: Record<string, unknown>) => Promise<number>;
  delete: (table: string, query: never) => Promise<number>;
}

// 确保 KVStoreEngine 也导出（引用用）
void KVStoreEngine;