/**
 * PluginManager 完整测试
 */

import { PluginManager } from '../../src/plugin/index';
import type { MetonaPlugin } from '../../src/constants';

describe('PluginManager', () => {
  let pm: PluginManager;

  beforeEach(() => {
    pm = new PluginManager();
  });

  // ---- 注册/卸载 ----

  describe('注册和卸载', () => {
    it('注册插件', () => {
      const plugin: MetonaPlugin = {
        name: 'test-plugin',
        version: '1.0.0',
        install: jest.fn(),
        destroy: jest.fn(),
      };
      pm.register(plugin);
      expect(pm.getPlugins()).toHaveLength(1);
      expect(plugin.install).toHaveBeenCalled();
    });

    it('按优先级排序', () => {
      const p1: MetonaPlugin = { name: 'low', version: '1.0', priority: 1, install: jest.fn(), destroy: jest.fn() };
      const p2: MetonaPlugin = { name: 'high', version: '1.0', priority: 10, install: jest.fn(), destroy: jest.fn() };
      const p3: MetonaPlugin = { name: 'mid', version: '1.0', priority: 5, install: jest.fn(), destroy: jest.fn() };

      pm.register(p1);
      pm.register(p2);
      pm.register(p3);

      const plugins = pm.getPlugins();
      expect(plugins[0].name).toBe('high');
      expect(plugins[1].name).toBe('mid');
      expect(plugins[2].name).toBe('low');
    });

    it('卸载插件调用 destroy', () => {
      const destroyFn = jest.fn();
      const plugin: MetonaPlugin = {
        name: 'test',
        version: '1.0',
        install: jest.fn(),
        destroy: destroyFn,
      };
      pm.register(plugin);
      pm.unregister('test');
      expect(destroyFn).toHaveBeenCalled();
      expect(pm.getPlugins()).toHaveLength(0);
    });

    it('卸载不存在的插件不报错', () => {
      expect(() => pm.unregister('nonexistent')).not.toThrow();
    });

    it('getPlugins 返回副本', () => {
      const plugin: MetonaPlugin = {
        name: 'test', version: '1.0', install: jest.fn(), destroy: jest.fn(),
      };
      pm.register(plugin);
      const plugins = pm.getPlugins();
      plugins.push({ name: 'external', version: '1.0', install: jest.fn(), destroy: jest.fn() });
      expect(pm.getPlugins()).toHaveLength(1);
    });
  });

  // ---- 钩子 ----

  describe('钩子系统', () => {
    it('注册和触发钩子', async () => {
      const callback = jest.fn();
      pm.on('beforeInsert', callback);
      await pm.trigger('beforeInsert', { id: '1' });
      expect(callback).toHaveBeenCalledWith({ id: '1' });
    });

    it('多个回调', async () => {
      const cb1 = jest.fn();
      const cb2 = jest.fn();
      pm.on('afterQuery', cb1);
      pm.on('afterQuery', cb2);
      await pm.trigger('afterQuery', 'SELECT *', []);
      expect(cb1).toHaveBeenCalled();
      expect(cb2).toHaveBeenCalled();
    });

    it('卸载钩子', async () => {
      const cb = jest.fn();
      pm.on('beforeUpdate', cb);
      pm.off('beforeUpdate', cb);
      await pm.trigger('beforeUpdate');
      expect(cb).not.toHaveBeenCalled();
    });

    it('触发未注册的钩子不报错', async () => {
      await expect(pm.trigger('beforeInsert')).resolves.toBeUndefined();
    });

    it('卸载不存在的回调不报错', () => {
      expect(() => pm.off('beforeInsert', jest.fn())).not.toThrow();
    });

    it('异步回调', async () => {
      const cb = jest.fn().mockResolvedValue(undefined);
      pm.on('beforeQuery', cb);
      await pm.trigger('beforeQuery');
      expect(cb).toHaveBeenCalled();
    });
  });

  // ---- 生命周期钩子覆盖 ----

  describe('全部钩子类型', () => {
    const hooks = [
      'beforeCreateTable', 'afterCreateTable',
      'beforeDropTable', 'afterDropTable',
      'beforeInsert', 'afterInsert',
      'beforeUpdate', 'afterUpdate',
      'beforeDelete', 'afterDelete',
      'beforeQuery', 'afterQuery',
      'beforeTransaction', 'afterTransaction',
    ] as const;

    hooks.forEach((hook) => {
      it(`钩子 ${hook} 可注册和触发`, async () => {
        const cb = jest.fn();
        pm.on(hook, cb);
        await pm.trigger(hook);
        expect(cb).toHaveBeenCalledTimes(1);
      });
    });
  });

  // ---- destroy ----

  describe('销毁', () => {
    it('destroy 调用所有插件的 destroy', () => {
      const d1 = jest.fn();
      const d2 = jest.fn();
      pm.register({ name: 'p1', version: '1.0', install: jest.fn(), destroy: d1 });
      pm.register({ name: 'p2', version: '1.0', install: jest.fn(), destroy: d2 });
      pm.destroy();
      expect(d1).toHaveBeenCalled();
      expect(d2).toHaveBeenCalled();
      expect(pm.getPlugins()).toHaveLength(0);
    });

    it('destroy 清空钩子', async () => {
      const cb = jest.fn();
      pm.on('beforeInsert', cb);
      pm.destroy();
      await pm.trigger('beforeInsert');
      expect(cb).not.toHaveBeenCalled();
    });

    it('插件 destroy 出错不影响销毁流程', () => {
      const badPlugin: MetonaPlugin = {
        name: 'bad',
        version: '1.0',
        install: jest.fn(),
        destroy: () => { throw new Error('destroy failed'); },
      };
      const goodPlugin: MetonaPlugin = {
        name: 'good',
        version: '1.0',
        install: jest.fn(),
        destroy: jest.fn(),
      };
      pm.register(badPlugin);
      pm.register(goodPlugin);
      expect(() => pm.destroy()).not.toThrow();
      expect(goodPlugin.destroy).toHaveBeenCalled();
    });
  });
});