import { Component, inject, signal } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Router, ActivatedRoute } from '@angular/router';
import { FormsModule } from '@angular/forms';
import { NzInputModule } from 'ng-zorro-antd/input';
import { NzButtonModule } from 'ng-zorro-antd/button';
import { NzCardModule } from 'ng-zorro-antd/card';
import { NzAlertModule } from 'ng-zorro-antd/alert';
import { AuthService } from '../../../core/services/auth.service';
import { ApiService } from '../../../core/services/api.service';
import { isAdminKey } from '../../../core/models';

@Component({
  selector: 'app-login',
  standalone: true,
  imports: [
    CommonModule,
    FormsModule,
    NzInputModule,
    NzButtonModule,
    NzCardModule,
    NzAlertModule,
  ],
  templateUrl: './login.component.html',
  styleUrl: './login.component.scss'
})
export class LoginComponent {
  private authService = inject(AuthService);
  private apiService = inject(ApiService);
  private router = inject(Router);
  private route = inject(ActivatedRoute);

  userId = '';
  adminKey = '';
  loading = signal(false);
  error = signal<string | null>(null);

  async login(): Promise<void> {
    if (!this.userId.trim() || !this.adminKey.trim()) {
      this.error.set('Please enter both User ID and Admin Key');
      return;
    }

    this.loading.set(true);
    this.error.set(null);

    // Temporarily set credentials to make the API call
    this.authService.login(this.userId.trim(), this.adminKey.trim());

    this.apiService.getCurrentKey(this.userId.trim()).subscribe({
      next: (key) => {
        if (!isAdminKey(key)) {
          this.authService.logout();
          this.error.set('This key does not have admin permissions. Please use an admin key.');
          this.loading.set(false);
          return;
        }

        // Login successful
        const returnUrl = this.route.snapshot.queryParams['returnUrl'] || '/messages';
        this.router.navigateByUrl(returnUrl);
      },
      error: (err) => {
        this.authService.logout();
        if (err.status === 401 || err.status === 403) {
          this.error.set('Invalid User ID or Admin Key');
        } else if (err.status === 404) {
          this.error.set('User not found');
        } else {
          this.error.set('Failed to authenticate. Please try again.');
        }
        this.loading.set(false);
      }
    });
  }
}