import { describe, it, expect, vi, beforeEach } from 'vitest';
import { AxiosError } from 'axios';
import {
  login,
  register,
  logout,
  refreshToken,
  requestPasswordReset,
  resetPassword,
  verifyEmail,
  resendVerificationEmail,
  type AuthResponse,
} from './authService';
import { apiClient } from '@/services/api/client';

// Mock apiClient
vi.mock('@/services/api/client', () => ({
  apiClient: {
    post: vi.fn(),
    get: vi.fn(),
  },
}));

// Mock handleApiServiceError - it always throws, so we let it through
// but need the real implementation for error handling tests
vi.mock('@/utils/serviceErrorHandler', async () => {
  const actual = await vi.importActual('@/utils/serviceErrorHandler');
  return actual;
});

const mockedApiClient = apiClient as {
  post: ReturnType<typeof vi.fn>;
  get: ReturnType<typeof vi.fn>;
};

describe('authService', () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  describe('login', () => {
    it('should successfully login and return auth response', async () => {
      const mockResponse: AuthResponse = {
        user: {
          id: '1',
          email: 'test@example.com',
          username: 'testuser',
        },
        token: {
          access_token: 'access-token-123',
          refresh_token: 'refresh-token-123',
          expires_in: 3600,
        },
      };

      mockedApiClient.post.mockResolvedValue({ data: mockResponse });

      const result = await login({
        email: 'test@example.com',
        password: 'password123',
      });

      expect(result).toEqual(mockResponse);
      expect(mockedApiClient.post).toHaveBeenCalledWith('/auth/login', {
        email: 'test@example.com',
        password: 'password123',
      });
    });

    it('should throw on login failure', async () => {
      const mockError = new AxiosError('Login failed');
      mockError.response = {
        status: 401,
        data: { error: 'Invalid credentials' },
      } as any;

      mockedApiClient.post.mockRejectedValue(mockError);

      await expect(
        login({
          email: 'test@example.com',
          password: 'wrongpassword',
        }),
      ).rejects.toThrow();
    });

    it('should throw on network errors', async () => {
      const mockError = new AxiosError('Network Error');
      mockError.request = {};

      mockedApiClient.post.mockRejectedValue(mockError);

      await expect(
        login({
          email: 'test@example.com',
          password: 'password123',
        }),
      ).rejects.toThrow();
    });
  });

  describe('register', () => {
    it('should successfully register and return auth response', async () => {
      const mockResponse: AuthResponse = {
        user: {
          id: '1',
          email: 'newuser@example.com',
          username: 'newuser',
        },
        token: {
          access_token: 'access-token-123',
          refresh_token: 'refresh-token-123',
          expires_in: 3600,
        },
      };

      mockedApiClient.post.mockResolvedValue({ data: mockResponse });

      const result = await register({
        email: 'newuser@example.com',
        password: 'password123',
        password_confirm: 'password123',
        username: 'newuser',
      });

      expect(result).toEqual(mockResponse);
      expect(mockedApiClient.post).toHaveBeenCalledWith('/auth/register', {
        email: 'newuser@example.com',
        password: 'password123',
        password_confirm: 'password123',
        username: 'newuser',
      });
    });

    it('should throw on registration failure', async () => {
      const mockError = new AxiosError('Registration failed');
      mockError.response = {
        status: 409,
        data: { error: 'Email already exists' },
      } as any;

      mockedApiClient.post.mockRejectedValue(mockError);

      await expect(
        register({
          email: 'existing@example.com',
          password: 'password123',
          password_confirm: 'password123',
          username: 'existinguser',
        }),
      ).rejects.toThrow();
    });
  });

  describe('logout', () => {
    it('should successfully logout', async () => {
      mockedApiClient.post.mockResolvedValue({ data: {} });

      await logout();

      expect(mockedApiClient.post).toHaveBeenCalledWith('/auth/logout');
    });

    it('should throw on logout failure', async () => {
      const mockError = new AxiosError('Logout failed');
      mockError.response = {
        status: 500,
        data: { error: 'Internal server error' },
      } as any;

      mockedApiClient.post.mockRejectedValue(mockError);

      await expect(logout()).rejects.toThrow();
    });
  });

  describe('refreshToken', () => {
    it('should successfully refresh token and return auth response', async () => {
      const mockResponse: AuthResponse = {
        user: {
          id: '1',
          email: 'test@example.com',
          username: 'testuser',
        },
        token: {
          access_token: 'new-access-token-123',
          refresh_token: 'new-refresh-token-123',
          expires_in: 3600,
        },
      };

      mockedApiClient.post.mockResolvedValue({ data: mockResponse });

      const result = await refreshToken('refresh-token-123');

      expect(result).toEqual(mockResponse);
      expect(mockedApiClient.post).toHaveBeenCalledWith('/auth/refresh', {
        refreshToken: 'refresh-token-123',
      });
    });

    it('should throw on refresh failure', async () => {
      const mockError = new AxiosError('Refresh failed');
      mockError.response = {
        status: 401,
        data: { error: 'Invalid refresh token' },
      } as any;

      mockedApiClient.post.mockRejectedValue(mockError);

      await expect(refreshToken('invalid-token')).rejects.toThrow();
    });
  });

  describe('requestPasswordReset', () => {
    it('should successfully request password reset', async () => {
      mockedApiClient.post.mockResolvedValue({ data: {} });

      await requestPasswordReset({
        email: 'test@example.com',
      });

      expect(mockedApiClient.post).toHaveBeenCalledWith(
        '/auth/password/reset-request',
        {
          email: 'test@example.com',
        },
      );
    });

    it('should throw on request failure', async () => {
      const mockError = new AxiosError('Request failed');
      mockError.response = {
        status: 404,
        data: { error: 'User not found' },
      } as any;

      mockedApiClient.post.mockRejectedValue(mockError);

      await expect(
        requestPasswordReset({
          email: 'nonexistent@example.com',
        }),
      ).rejects.toThrow();
    });
  });

  describe('resetPassword', () => {
    it('should successfully reset password', async () => {
      mockedApiClient.post.mockResolvedValue({ data: {} });

      await resetPassword({
        token: 'reset-token-123',
        password: 'newpassword123',
        confirmPassword: 'newpassword123',
      });

      expect(mockedApiClient.post).toHaveBeenCalledWith(
        '/auth/password/reset',
        {
          token: 'reset-token-123',
          password: 'newpassword123',
        },
      );
    });

    it('should throw on reset failure', async () => {
      const mockError = new AxiosError('Reset failed');
      mockError.response = {
        status: 400,
        data: { error: 'Invalid or expired token' },
      } as any;

      mockedApiClient.post.mockRejectedValue(mockError);

      await expect(
        resetPassword({
          token: 'invalid-token',
          password: 'newpassword123',
          confirmPassword: 'newpassword123',
        }),
      ).rejects.toThrow();
    });
  });

  describe('verifyEmail', () => {
    it('should successfully verify email', async () => {
      mockedApiClient.get.mockResolvedValue({ data: {} });

      await verifyEmail('verification-token-123');

      expect(mockedApiClient.get).toHaveBeenCalledWith(
        '/auth/verify-email?token=verification-token-123',
      );
    });

    it('should throw on verification failure', async () => {
      const mockError = new AxiosError('Verification failed');
      mockError.response = {
        status: 400,
        data: { error: 'Invalid or expired token' },
      } as any;

      mockedApiClient.get.mockRejectedValue(mockError);

      await expect(verifyEmail('invalid-token')).rejects.toThrow();
    });
  });

  describe('resendVerificationEmail', () => {
    it('should successfully resend verification email', async () => {
      mockedApiClient.post.mockResolvedValue({ data: {} });

      await resendVerificationEmail('test@example.com');

      expect(mockedApiClient.post).toHaveBeenCalledWith(
        '/auth/resend-verification',
        {
          email: 'test@example.com',
        },
      );
    });

    it('should throw on resend failure', async () => {
      const mockError = new AxiosError('Resend failed');
      mockError.response = {
        status: 429,
        data: { error: 'Too many requests' },
      } as any;

      mockedApiClient.post.mockRejectedValue(mockError);

      await expect(
        resendVerificationEmail('test@example.com'),
      ).rejects.toThrow();
    });
  });
});