import { Test, TestingModule } from '@nestjs/testing';
import { ConfigService } from '@nestjs/config';
import { WeComChannelService } from './wecom-channel.service';
import { NotificationPayload } from './notification-channel.interface';

describe('WeComChannelService', () => {
  let service: WeComChannelService;
  let configService: ConfigService;

  const defaultConfig: Record<string, string> = {
    WECOM_WEBHOOK_URL: 'https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=test-key',
    WECOM_WEBHOOK_URL_ALERT: 'https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=alert-key',
    NOTIFICATION_MOCK_MODE: 'false',
  };

  const mockConfigGet = jest.fn((key: string, defaultValue?: string) => {
    return defaultConfig[key] ?? defaultValue;
  });

  beforeEach(async () => {
    mockConfigGet.mockClear();
    mockConfigGet.mockImplementation((key: string, defaultValue?: string) => {
      return defaultConfig[key] ?? defaultValue;
    });

    const module: TestingModule = await Test.createTestingModule({
      providers: [
        WeComChannelService,
        {
          provide: ConfigService,
          useValue: { get: mockConfigGet },
        },
      ],
    }).compile();

    service = module.get<WeComChannelService>(WeComChannelService);
    configService = module.get<ConfigService>(ConfigService);
  });

  it('should be defined', () => {
    expect(service).toBeDefined();
  });

  it('should have correct name and type', () => {
    expect(service.name).toBe('WeCom');
    expect(service.type).toBe('wecom');
  });

  describe('send text message', () => {
    it('should send text message successfully', async () => {
      const httpPostSpy = jest.spyOn(service as any, 'httpPost').mockResolvedValue({
        errcode: 0,
        errmsg: 'ok',
      });

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Test',
        content: 'Hello from WeCom',
        channel: 'wecom',
      };

      const result = await service.send(payload);

      expect(result.success).toBe(true);
      expect(httpPostSpy).toHaveBeenCalledWith(
        'https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=test-key',
        {
          msgtype: 'text',
          text: {
            content: '【Test】\nHello from WeCom',
            mentioned_list: [],
          },
        },
      );
    });

    it('should include title in text message content', async () => {
      const httpPostSpy = jest.spyOn(service as any, 'httpPost').mockResolvedValue({
        errcode: 0,
        errmsg: 'ok',
      });

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Alert Title',
        content: 'Detail content',
        channel: 'wecom',
      };

      await service.send(payload);

      expect(httpPostSpy).toHaveBeenCalledWith(
        expect.any(String),
        expect.objectContaining({
          msgtype: 'text',
          text: expect.objectContaining({
            content: expect.stringContaining('Alert Title'),
          }),
        }),
      );
    });
  });

  describe('send markdown message', () => {
    it('should send markdown message when contentHtml is provided', async () => {
      const httpPostSpy = jest.spyOn(service as any, 'httpPost').mockResolvedValue({
        errcode: 0,
        errmsg: 'ok',
      });

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Markdown Test',
        content: 'Plain text',
        contentHtml: '# Heading\n> Quote\n**Bold**',
        channel: 'wecom',
      };

      const result = await service.send(payload);

      expect(result.success).toBe(true);
      expect(httpPostSpy).toHaveBeenCalledWith(
        expect.any(String),
        {
          msgtype: 'markdown',
          markdown: {
            content: '# Heading\n> Quote\n**Bold**',
          },
        },
      );
    });

    it('should send markdown message when metadata.msgtype is markdown', async () => {
      const httpPostSpy = jest.spyOn(service as any, 'httpPost').mockResolvedValue({
        errcode: 0,
        errmsg: 'ok',
      });

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Markdown Test',
        content: '# Heading\n**Bold text**',
        channel: 'wecom',
        metadata: { msgtype: 'markdown' },
      };

      const result = await service.send(payload);

      expect(result.success).toBe(true);
      expect(httpPostSpy).toHaveBeenCalledWith(
        expect.any(String),
        {
          msgtype: 'markdown',
          markdown: {
            content: '# Heading\n**Bold text**',
          },
        },
      );
    });
  });

  describe('mention users', () => {
    it('should mention specified users in text message', async () => {
      const httpPostSpy = jest.spyOn(service as any, 'httpPost').mockResolvedValue({
        errcode: 0,
        errmsg: 'ok',
      });

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Mention Test',
        content: 'Please check this',
        channel: 'wecom',
        metadata: {
          mentioned_list: ['zhangsan', 'lisi'],
        },
      };

      await service.send(payload);

      expect(httpPostSpy).toHaveBeenCalledWith(
        expect.any(String),
        expect.objectContaining({
          msgtype: 'text',
          text: expect.objectContaining({
            mentioned_list: ['zhangsan', 'lisi'],
          }),
        }),
      );
    });

    it('should mention @all when specified', async () => {
      const httpPostSpy = jest.spyOn(service as any, 'httpPost').mockResolvedValue({
        errcode: 0,
        errmsg: 'ok',
      });

      const payload: NotificationPayload = {
        type: 'warning',
        title: 'Urgent',
        content: 'Everyone attention',
        channel: 'wecom',
        metadata: {
          mentioned_list: ['@all'],
        },
      };

      await service.send(payload);

      expect(httpPostSpy).toHaveBeenCalledWith(
        expect.any(String),
        expect.objectContaining({
          text: expect.objectContaining({
            mentioned_list: ['@all'],
          }),
        }),
      );
    });
  });

  describe('multiple webhooks', () => {
    it('should use alert webhook when metadata.webhookKey is specified', async () => {
      const httpPostSpy = jest.spyOn(service as any, 'httpPost').mockResolvedValue({
        errcode: 0,
        errmsg: 'ok',
      });

      const payload: NotificationPayload = {
        type: 'error',
        title: 'Alert',
        content: 'System error',
        channel: 'wecom',
        metadata: {
          webhookKey: 'WECOM_WEBHOOK_URL_ALERT',
        },
      };

      await service.send(payload);

      expect(httpPostSpy).toHaveBeenCalledWith(
        'https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=alert-key',
        expect.any(Object),
      );
    });
  });

  describe('error handling', () => {
    it('should throw error when webhook URL is not configured', async () => {
      mockConfigGet.mockReturnValue(undefined);

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Test',
        content: 'Hello',
        channel: 'wecom',
      };

      const result = await service.send(payload);

      expect(result.success).toBe(false);
      expect(result.error).toContain('Webhook URL not configured');
    });

    it('should return failure when WeCom API returns error', async () => {
      jest.spyOn(service as any, 'httpPost').mockResolvedValue({
        errcode: 40001,
        errmsg: 'invalid token',
      });

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Test',
        content: 'Hello',
        channel: 'wecom',
      };

      const result = await service.send(payload);

      expect(result.success).toBe(false);
      expect(result.error).toContain('invalid token');
    });

    it('should handle network errors gracefully', async () => {
      jest.spyOn(service as any, 'httpPost').mockRejectedValue(
        new Error('Network timeout'),
      );

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Test',
        content: 'Hello',
        channel: 'wecom',
      };

      const result = await service.send(payload);

      expect(result.success).toBe(false);
      expect(result.error).toContain('Network timeout');
    });
  });

  describe('validate', () => {
    it('should validate payload with title and content', async () => {
      const payload: NotificationPayload = {
        type: 'info',
        title: 'Test',
        content: 'Hello',
        channel: 'wecom',
      };

      const isValid = await service.validate(payload);
      expect(isValid).toBe(true);
    });

    it('should invalidate payload without title or content', async () => {
      const payload: NotificationPayload = {
        type: 'info',
        title: '',
        content: '',
        channel: 'wecom',
      };

      const isValid = await service.validate(payload);
      expect(isValid).toBe(false);
    });
  });

  describe('isAvailable', () => {
    it('should return true when webhook URL is configured', async () => {
      const available = await service.isAvailable();
      expect(available).toBe(true);
    });

    it('should return false when webhook URL is not configured', async () => {
      mockConfigGet.mockReturnValue(undefined);
      const available = await service.isAvailable();
      expect(available).toBe(false);
    });
  });

  describe('mock mode', () => {
    it('should return mock result when NOTIFICATION_MOCK_MODE is true', async () => {
      mockConfigGet.mockImplementation((key: string) => {
        if (key === 'NOTIFICATION_MOCK_MODE') return 'true';
        if (key === 'WECOM_WEBHOOK_URL') return 'https://example.com';
        return undefined;
      });

      const payload: NotificationPayload = {
        type: 'info',
        title: 'Test',
        content: 'Hello',
        channel: 'wecom',
      };

      const result = await service.send(payload);

      expect(result.success).toBe(true);
      expect(result.message).toContain('mock');
    });
  });
});