import { AuthApiClient } from '../../api/auth/AuthApiClient';
import { SessionViewModel } from '../../view-models/SessionViewModel';
import type { LoginParamsDTO } from '../../types/generated/LoginParamsDTO';
import type { SignupParamsDTO } from '../../types/generated/SignupParamsDTO';
import type { ForgotPasswordDTO } from '../../types/generated/ForgotPasswordDTO';
import type { ResetPasswordDTO } from '../../types/generated/ResetPasswordDTO';
import type { DemoLoginDTO } from '../../types/generated/DemoLoginDTO';

/**
 * Auth Service
 *
 * Orchestrates authentication operations by coordinating API calls.
 * All dependencies are injected via constructor.
 */
export class AuthService {
  constructor(
    private readonly apiClient: AuthApiClient
  ) {}

  /**
   * Sign up a new user
   */
  async signup(params: SignupParamsDTO): Promise<SessionViewModel> {
    try {
      const dto = await this.apiClient.signup(params);
      return new SessionViewModel(dto.user);
    } catch (error) {
      throw error;
    }
  }

  /**
   * Log in an existing user
   */
  async login(params: LoginParamsDTO): Promise<SessionViewModel> {
    try {
      const dto = await this.apiClient.login(params);
      return new SessionViewModel(dto.user);
    } catch (error) {
      throw error;
    }
  }

  /**
   * Log out the current user
   */
  async logout(): Promise<void> {
    try {
      await this.apiClient.logout();
    } catch (error) {
      throw error;
    }
  }

  /**
   * Forgot password - send reset link
   */
  async forgotPassword(params: ForgotPasswordDTO): Promise<{ message: string; magicLink?: string }> {
    try {
      return await this.apiClient.forgotPassword(params);
    } catch (error) {
      throw error;
    }
  }

  /**
   * Reset password with token
   */
  async resetPassword(params: ResetPasswordDTO): Promise<{ message: string }> {
    try {
      return await this.apiClient.resetPassword(params);
    } catch (error) {
      throw error;
    }
  }

  /**
   * Demo login (development only)
   */
  async demoLogin(params: DemoLoginDTO): Promise<SessionViewModel> {
    try {
      const dto = await this.apiClient.demoLogin(params);
      return new SessionViewModel(dto.user);
    } catch (error) {
      throw error;
    }
  }
}