import { Component, inject, signal } from '@angular/core';
import { Router } from '@angular/router';
import { FormsModule } from '@angular/forms';
import { AuthService } from '../../core/services/auth.service';
import { ThemeService } from '../../core/services/theme.service';
import {
  CardComponent,
  CardHeaderComponent,
  CardTitleComponent,
  CardDescriptionComponent,
  CardContentComponent,
  CardFooterComponent,
} from '../../ui/card/card.component';
import { ButtonComponent } from '../../ui/button/button.component';
import { InputComponent } from '../../ui/input/input.component';
import { LabelComponent } from '../../ui/label/label.component';
import { AlertComponent, AlertDescriptionComponent } from '../../ui/alert/alert.component';

@Component({
  selector: 'app-login',
  standalone: true,
  imports: [
    FormsModule,
    CardComponent,
    CardHeaderComponent,
    CardTitleComponent,
    CardDescriptionComponent,
    CardContentComponent,
    CardFooterComponent,
    ButtonComponent,
    InputComponent,
    LabelComponent,
    AlertComponent,
    AlertDescriptionComponent,
  ],
  template: `
    <div class="min-h-screen flex items-center justify-center bg-background p-4">
      <div class="absolute top-4 right-4">
        <button
          uiButton
          variant="ghost"
          size="icon"
          (click)="theme.toggle()"
        >
          @if (theme.resolvedTheme() === 'dark') {
            <svg class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
              <path stroke-linecap="round" stroke-linejoin="round" d="M12 3v1m0 16v1m9-9h-1M4 12H3m15.364 6.364l-.707-.707M6.343 6.343l-.707-.707m12.728 0l-.707.707M6.343 17.657l-.707.707M16 12a4 4 0 11-8 0 4 4 0 018 0z" />
            </svg>
          } @else {
            <svg class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
              <path stroke-linecap="round" stroke-linejoin="round" d="M20.354 15.354A9 9 0 018.646 3.646 9.003 9.003 0 0012 21a9.003 9.003 0 008.354-5.646z" />
            </svg>
          }
        </button>
      </div>

      <ui-card class="w-full max-w-md">
        <ui-card-header class="text-center">
          <div class="flex justify-center mb-4">
            <svg class="h-12 w-12 text-primary" viewBox="0 0 24 24" fill="currentColor">
              <path d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z"/>
            </svg>
          </div>
          <ui-card-title>Welcome to Onebox</ui-card-title>
          <ui-card-description>Enter your credentials to sign in</ui-card-description>
        </ui-card-header>

        <form (ngSubmit)="onSubmit()">
          <ui-card-content class="space-y-4">
            @if (error()) {
              <ui-alert variant="destructive">
                <ui-alert-description>{{ error() }}</ui-alert-description>
              </ui-alert>
            }

            <div class="space-y-2">
              <label uiLabel for="username">Username</label>
              <input
                uiInput
                id="username"
                type="text"
                [(ngModel)]="username"
                name="username"
                placeholder="Enter username"
                autocomplete="username"
                required
              />
            </div>

            <div class="space-y-2">
              <label uiLabel for="password">Password</label>
              <input
                uiInput
                id="password"
                type="password"
                [(ngModel)]="password"
                name="password"
                placeholder="Enter password"
                autocomplete="current-password"
                required
              />
            </div>
          </ui-card-content>

          <ui-card-footer>
            <button
              uiButton
              type="submit"
              class="w-full"
              [disabled]="loading()"
            >
              @if (loading()) {
                <svg class="animate-spin h-4 w-4 mr-2" fill="none" viewBox="0 0 24 24">
                  <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
                  <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                </svg>
                Signing in...
              } @else {
                Sign in
              }
            </button>
          </ui-card-footer>
        </form>

        <div class="px-6 pb-6">
          <p class="text-xs text-center text-muted-foreground">
            Default credentials: admin / admin
          </p>
        </div>
      </ui-card>
    </div>
  `,
})
export class LoginComponent {
  private auth = inject(AuthService);
  private router = inject(Router);
  theme = inject(ThemeService);

  username = '';
  password = '';
  loading = signal(false);
  error = signal<string | null>(null);

  async onSubmit(): Promise<void> {
    if (!this.username || !this.password) {
      this.error.set('Please enter username and password');
      return;
    }

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

    const result = await this.auth.login(this.username, this.password);

    this.loading.set(false);

    if (result.success) {
      this.router.navigate(['/dashboard']);
    } else {
      this.error.set(result.error || 'Invalid credentials');
    }
  }
}