// Mock dependencies
jest.mock('../../../../../services/email/core/EmailClient', () => {
  return jest.fn().mockImplementation(() => ({
    initialize: jest.fn().mockResolvedValue(),
    sendEmail: jest.fn().mockResolvedValue({ success: true, messageId: 'msg-123' }),
  }));
});

jest.mock('../../../../../services/email/core/TemplateManager', () => {
  return jest.fn().mockImplementation(() => ({
    initialize: jest.fn().mockResolvedValue(),
    renderTemplate: jest.fn().mockResolvedValue('<html>Test</html>'),
  }));
});

jest.mock('../../../../../utils/logger', () => ({
  info: jest.fn(),
  error: jest.fn(),
  warn: jest.fn(),
}));

const AlphaInvitationEmailService = require('../../../../../services/email/domain/AlphaInvitationEmailService');

describe('AlphaInvitationEmailService', () => {
  let service;
  const originalEnv = process.env;

  beforeEach(() => {
    jest.clearAllMocks();
    process.env = { ...originalEnv, FRONTEND_URL: 'http://localhost:3000' };
    service = new AlphaInvitationEmailService();
  });

  afterEach(() => {
    process.env = originalEnv;
  });

  describe('initialize', () => {
    it('should initialize only once', async () => {
      await service.initialize();
      await service.initialize();

      expect(service.emailClient.initialize).toHaveBeenCalledTimes(1);
      expect(service.templateManager.initialize).toHaveBeenCalledTimes(1);
    });
  });

  describe('sendAlphaInvitation', () => {
    const email = 'john@example.com';
    const code = 'ALPHA-123-XYZ';

    it('should send alpha invitation email with correct variables', async () => {
      const result = await service.sendAlphaInvitation(email, code);

      expect(result.success).toBe(true);
      expect(service.templateManager.renderTemplate).toHaveBeenCalledWith(
        'alphaInvitationToUser',
        expect.objectContaining({
          code: 'ALPHA-123-XYZ',
          email: 'john@example.com',
          frontendUrl: 'http://localhost:3000',
          title: 'Welcome to Alpha Testing!',
        })
      );
      expect(service.emailClient.sendEmail).toHaveBeenCalledWith(
        'john@example.com',
        'Your Alpha Access Code - Village Share',
        expect.any(String)
      );
    });

    it('should include code in message variable', async () => {
      await service.sendAlphaInvitation(email, code);

      expect(service.templateManager.renderTemplate).toHaveBeenCalledWith(
        'alphaInvitationToUser',
        expect.objectContaining({
          message: expect.stringContaining('ALPHA-123-XYZ'),
        })
      );
    });

    it('should handle errors gracefully', async () => {
      service.templateManager.renderTemplate.mockRejectedValueOnce(new Error('Template error'));

      const result = await service.sendAlphaInvitation(email, code);

      expect(result.success).toBe(false);
      expect(result.error).toBe('Template error');
    });
  });
});
