/**
 * Vue 集成 composables 测试（v0.2.6 补强）
 * @module tests/integrations/vue
 *
 * 项目零运行时依赖（vue 为 peer dependency），
 * 使用最小 Vue mock 验证 composables 的真实逻辑：
 * - onMounted 时执行查询
 * - watch sql/deps 变化重新执行
 * - refresh 手动刷新
 * - 表名校验（SQL 注入防护）
 */
import 'fake-indexeddb/auto';

// ---- 最小 Vue mock（自包含：jest.mock 工厂不能引用外部变量） ----
jest.mock('vue', () => {
  const mountQueue: Array<() => void | Promise<void>> = [];
  const watchList: Array<{ sources: any[]; cb: () => void | Promise<void> }> = [];
  return {
    ref: (init: any) => {
      const box: { value: any } = { value: init };
      return box;
    },
    watch: (sources: any[], cb: any) => {
      watchList.push({ sources, cb });
    },
    onMounted: (fn: any) => {
      mountQueue.push(fn);
    },
    __mockMounted: mountQueue,
    __mockWatch: watchList,
    __mockReset: () => {
      mountQueue.length = 0;
      watchList.length = 0;
    },
  };
}, { virtual: true });

import { useSqlarkQuery, useSqlarkTable, useSqlarkDatabase } from '../../src/integrations/vue';

/** mock 模块内的挂载/监听队列（自包含作用域） */
const vueMock = jest.requireMock('vue') as {
  __mockMounted: Array<() => void | Promise<void>>;
  __mockWatch: Array<{ sources: any[]; cb: () => void | Promise<void> }>;
  __mockReset: () => void;
};

beforeEach(() => {
  vueMock.__mockReset();
});

/** 模拟组件挂载：执行 onMounted 注册的回调 */
async function flushMounted(): Promise<void> {
  const fns = vueMock.__mockMounted.splice(0);
  for (const fn of fns) {
    await fn();
  }
}

/** 触发 watch 回调 */
async function flushWatch(): Promise<void> {
  const pairs = vueMock.__mockWatch.splice(0);
  for (const { cb } of pairs) {
    await cb();
  }
}

/** 构造最小响应式引用（与 vue.mock 的 ref 等价） */
function makeRef<T>(init: T): { value: T } {
  return { value: init };
}

describe('useSqlarkQuery', () => {
  test('onMounted 时执行 SQL 查询并更新响应式 data', async () => {
    const db = { query: jest.fn().mockResolvedValue([{ id: '1' }]) } as any;
    const hook = useSqlarkQuery(db, 'SELECT * FROM users');

    expect(hook.loading.value).toBe(true);
    expect(db.query).not.toHaveBeenCalled();

    await flushMounted();

    expect(db.query).toHaveBeenCalledWith('SELECT * FROM users');
    expect(hook.loading.value).toBe(false);
    expect(hook.data.value).toEqual([{ id: '1' }]);
    expect(hook.error.value).toBeNull();
  });

  test('查询失败时设置 error', async () => {
    const db = { query: jest.fn().mockRejectedValue(new Error('vue boom')) } as any;
    const hook = useSqlarkQuery(db, 'SELECT * FROM users');

    await flushMounted();

    expect(hook.error.value).toBeInstanceOf(Error);
    expect((hook.error.value as Error).message).toBe('vue boom');
    expect(hook.data.value).toEqual([]);
  });

  test('refresh 重新执行查询', async () => {
    let call = 0;
    const db = { query: jest.fn().mockImplementation(async () => [{ n: ++call }]) } as any;
    const hook = useSqlarkQuery(db, 'SELECT * FROM users');

    await flushMounted();
    expect(hook.data.value).toEqual([{ n: 1 }]);

    await hook.refresh();
    expect(db.query).toHaveBeenCalledTimes(2);
    expect(hook.data.value).toEqual([{ n: 2 }]);
  });

  test('watch 注册在 sql 与 deps 上', async () => {
    const db = { query: jest.fn().mockResolvedValue([]) } as any;
    const sqlRef = makeRef('SELECT * FROM users');
    useSqlarkQuery(db, sqlRef.value, [sqlRef]);

    expect(vueMock.__mockWatch).toHaveLength(1);
    expect(vueMock.__mockWatch[0].sources).toHaveLength(2); // [() => sql, ...deps]

    // 模拟依赖变化触发 watch
    sqlRef.value = 'SELECT * FROM orders';
    await flushWatch();
    expect(db.query).toHaveBeenCalledWith('SELECT * FROM users');
  });
});

describe('useSqlarkTable', () => {
  test('合法表名执行全表查询', async () => {
    const db = { query: jest.fn().mockResolvedValue([{ id: 1 }]) } as any;
    const hook = useSqlarkTable(db, 'users');

    await flushMounted();

    expect(db.query).toHaveBeenCalledWith('SELECT * FROM users');
    expect(hook.data.value).toEqual([{ id: 1 }]);
  });

  test('非法表名抛出校验错误（SQL 注入防护）', () => {
    const db = { query: jest.fn() } as any;
    expect(() => useSqlarkTable(db, 'users; DELETE FROM orders')).toThrow(/Invalid table name/);
    expect(() => useSqlarkTable(db, 'users--')).toThrow(/Invalid table name/);
    expect(db.query).not.toHaveBeenCalled();
  });
});

describe('useSqlarkDatabase', () => {
  test('onMounted 创建并初始化数据库实例', async () => {
    const hook = useSqlarkDatabase({ name: 'vue-hook' });
    expect(hook.ready.value).toBe(false);

    await flushMounted();

    expect(hook.db.value).not.toBeNull();
    expect(hook.ready.value).toBe(true);
    expect(hook.error.value).toBeNull();
  });

  test('初始化失败时设置 error', async () => {
    // 使用非法配置触发初始化错误（mode 未知）
    const hook = useSqlarkDatabase({ name: 'vue-fail', mode: 'unknown-mode' as any });
    await flushMounted();

    expect(hook.db.value).toBeNull();
    expect(hook.ready.value).toBe(false);
    expect(hook.error.value).toBeInstanceOf(Error);
  });
});