class AuthService {
  /**
   * Performs user sign in.
   * Mock implementation uses email: ujjwal@sentientgeeks.com and password: Test@123
   */
  async signIn(emailOrPhone: string, password: string): Promise<string> {
    // Simulating API call delay
    await new Promise<void>((resolve) => setTimeout(() => resolve(), 1000));

    // Mock credentials check
    if (emailOrPhone.trim() === 'ujjwal@sentientgeeks.com' && password === 'Test@123') {
      return 'mock-access-token';
    }

    /*
    // REAL API IMPLEMENTATION:
    try {
      const response = await fetch('https://api.yourdomain.com/auth/login', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          username: emailOrPhone,
          password: password,
        }),
      });

      if (!response.ok) {
        const errorData = await response.json();
        throw new Error(errorData.message || 'Login failed');
      }

      const data = await response.json();
      return data.accessToken; // returns the real token
    } catch (error) {
      throw error;
    }
    */

    throw new Error('Invalid email/phone number or password.');
  }
}

export default new AuthService();