const { PluginRegistry } = require('../src/plugins/plugin-registry');
const { PluginAPI } = require('../src/plugins/plugin-api');
const { EventBus } = require('../src/plugins/event-bus');

class TestPlugin extends PluginAPI {
  init(context) {
    this.initialized = true;
    this.ctx = context;
  }
  activate() {
    this.activated = true;
  }
  deactivate() {
    this.deactivated = true;
  }
}

describe('PluginRegistry', () => {
  let registry;
  let mockDeps;

  beforeEach(() => {
    mockDeps = {
      sidebar: { registerPanel: jest.fn() },
      commands: { register: jest.fn() },
      statusBar: { registerIndicator: jest.fn() },
      eventBus: new EventBus(),
      settings: { get: jest.fn(), set: jest.fn(), onChanged: jest.fn() },
      editor: {
        getContent: jest.fn(() => ''),
        getSelection: jest.fn(() => ''),
        insertAtCursor: jest.fn(),
        onContentChanged: jest.fn(),
      },
      ipc: { invoke: jest.fn(), on: jest.fn() },
    };
    registry = new PluginRegistry(mockDeps);
  });

  test('register — stores plugin and calls init', () => {
    registry.register({
      id: 'test',
      name: 'Test',
      version: '1.0.0',
      description: 'desc',
      manifest: {},
      PluginClass: TestPlugin,
      dir: '/tmp/test',
    });
    const entry = registry.getPlugin('test');
    expect(entry).toBeDefined();
    expect(entry.instance.initialized).toBe(true);
  });

  test('register — works without PluginClass', () => {
    registry.register({
      id: 'manifest-only',
      name: 'Manifest Only',
      version: '1.0.0',
      description: 'desc',
      manifest: {},
      PluginClass: null,
      dir: '/tmp/test',
    });
    expect(registry.getPlugin('manifest-only')).toBeDefined();
  });

  test('register — init error does not crash, plugin not registered', () => {
    class BadPlugin extends PluginAPI {
      init() {
        throw new Error('init fail');
      }
    }
    expect(() => {
      registry.register({
        id: 'bad',
        name: 'Bad',
        version: '1.0.0',
        description: 'desc',
        manifest: {},
        PluginClass: BadPlugin,
        dir: '/tmp/test',
      });
    }).not.toThrow();
    expect(registry.getPlugin('bad')).toBeUndefined();
  });

  test('getPlugin — returns undefined for unknown', () => {
    expect(registry.getPlugin('nope')).toBeUndefined();
  });

  test('getAll — returns all registered plugins', () => {
    registry.register({
      id: 'a',
      name: 'A',
      version: '1',
      description: '',
      manifest: {},
      PluginClass: null,
      dir: '',
    });
    registry.register({
      id: 'b',
      name: 'B',
      version: '1',
      description: '',
      manifest: {},
      PluginClass: null,
      dir: '',
    });
    expect(registry.getAll()).toHaveLength(2);
  });

  test('activate — calls activate on plugin instance', () => {
    registry.register({
      id: 'test',
      name: 'Test',
      version: '1',
      description: '',
      manifest: {},
      PluginClass: TestPlugin,
      dir: '',
    });
    registry.activate('test');
    expect(registry.getPlugin('test').instance.activated).toBe(true);
  });

  test('deactivate — calls deactivate on plugin instance', () => {
    registry.register({
      id: 'test',
      name: 'Test',
      version: '1',
      description: '',
      manifest: {},
      PluginClass: TestPlugin,
      dir: '',
    });
    registry.deactivate('test');
    expect(registry.getPlugin('test').instance.deactivated).toBe(true);
  });

  test('exportHooks are available and populated', () => {
    registry.register({
      id: 'test',
      name: 'Test',
      version: '1',
      description: '',
      manifest: {},
      PluginClass: TestPlugin,
      dir: '',
    });
    const handler = jest.fn();
    registry.getPlugin('test').instance.ctx.exports.registerPreHook(handler);
    expect(registry.exportHooks.preHooks).toContain(handler);
  });
});