// src/api/auth/authService.ts
import { tokenManager } from '../auth/tokenManager';
import { apiClient } from '../base/apiClient';

export interface LoginCredentials {
  email: string;
  password: string;
}

export interface RegisterData {
  email: string;
  password: string;
  full_name: string;
  tenant_name?: string;
}

export interface UserProfile {
  id: string;
  email: string;
  full_name: string;
  tenant_id: string;
  role: string;
  is_active: boolean;
  created_at: string;
}

class AuthService {
  async login(credentials: LoginCredentials): Promise<UserProfile> {
    // OAuth2 password flow
    const formData = new URLSearchParams();
    formData.append('username', credentials.email);
    formData.append('password', credentials.password);
    formData.append('grant_type', 'password');

    const response = await fetch('/api/auth/token', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
      },
      body: formData
    });

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

    const tokenResponse = await response.json();
    await tokenManager.storeTokens(tokenResponse);

    // Get user profile
    return this.getCurrentUser();
  }

  async register(data: RegisterData): Promise<UserProfile> {
    const response = await apiClient.post('/auth/register', data);
    
    // Auto-login after registration
    await this.login({
      email: data.email,
      password: data.password
    });

    return response;
  }

  async logout(): Promise<void> {
    try {
      await apiClient.post('/auth/logout');
    } finally {
      tokenManager.clearTokens();
      window.location.href = '/login';
    }
  }

  async getCurrentUser(): Promise<UserProfile> {
    return apiClient.get('/auth/me');
  }

  async updateProfile(updates: Partial<UserProfile>): Promise<UserProfile> {
    return apiClient.patch('/auth/profile', updates);
  }

  async changePassword(currentPassword: string, newPassword: string): Promise<void> {
    await apiClient.post('/auth/change-password', {
      current_password: currentPassword,
      new_password: newPassword
    });
  }

  isAuthenticated(): boolean {
    return tokenManager.isAuthenticated();
  }
}

export const authService = new AuthService();