import { Component, Input, OnInit } from '@angular/core';
import { CommonModule } from '@angular/common';
import { MatCardModule } from '@angular/material/card';
import { MatButtonModule } from '@angular/material/button';
import { MatIconModule } from '@angular/material/icon';
import { MatExpansionModule } from '@angular/material/expansion';
import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
import { Tunnel, Mapping } from '../../../shared/models';
import { ApiService } from '../../../core/services/api.service';

@Component({
  selector: 'app-tunnel-list',
  standalone: true,
  imports: [
    CommonModule,
    MatCardModule,
    MatButtonModule,
    MatIconModule,
    MatExpansionModule,
    MatProgressSpinnerModule,
  ],
  template: `
    <mat-card class="tunnels-card">
      <mat-card-header>
        <mat-icon mat-card-avatar>dns</mat-icon>
        <mat-card-title>Tunnels</mat-card-title>
        <mat-card-subtitle
          >{{ tunnels.length }} tunnel(s) configured</mat-card-subtitle
        >
      </mat-card-header>

      <mat-card-content>
        @if (isLoading) {
          <div class="loading-container">
            <mat-spinner diameter="30"></mat-spinner>
          </div>
        }

        @if (!isLoading && tunnels.length === 0) {
          <div class="empty-state">
            <mat-icon>info</mat-icon>
            <p>No tunnels configured</p>
          </div>
        }

        <mat-accordion>
          @for (tunnel of tunnels; track tunnel.id) {
            <mat-expansion-panel>
              <mat-expansion-panel-header>
                <mat-panel-title>
                  <mat-icon class="tunnel-icon">hub</mat-icon>
                  {{ tunnel.name }}
                </mat-panel-title>
                <mat-panel-description>
                  {{ tunnel.environment }}
                </mat-panel-description>
              </mat-expansion-panel-header>

              @if (expandedTunnelId === tunnel.id) {
                @if (mappingsLoading) {
                  <mat-spinner diameter="20"></mat-spinner>
                } @else if (tunnelMappings[tunnel.id]?.length === 0) {
                  <p class="no-mappings">No mappings for this tunnel</p>
                } @else {
                  @for (mapping of tunnelMappings[tunnel.id]; track mapping.id) {
                    <div class="mapping-item">
                      <span class="hostname"
                        >{{ mapping.subdomain }}.hithomelabs.com</span
                      >
                      <span class="service"
                        >→ {{ mapping.protocol }}://192.168.0.100:{{
                          mapping.port
                        }}</span
                      >
                    </div>
                  }
                }
              } @else {
                <button
                  mat-button
                  color="primary"
                  (click)="loadMappings(tunnel.id)"
                >
                  <mat-icon>visibility</mat-icon>
                  View Mappings
                </button>
              }
            </mat-expansion-panel>
          }
        </mat-accordion>
      </mat-card-content>
    </mat-card>
  `,
  styles: [
    `
      .tunnels-card {
        margin-bottom: 1.5rem;
      }

      .loading-container {
        display: flex;
        justify-content: center;
        padding: 2rem;
      }

      .empty-state {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 2rem;
        color: #666;
      }

      .empty-state mat-icon {
        font-size: 48px;
        width: 48px;
        height: 48px;
      }

      .tunnel-icon {
        margin-right: 0.5rem;
      }

      .mapping-item {
        display: flex;
        flex-direction: column;
        padding: 0.75rem;
        margin: 0.5rem 0;
        background: #f5f5f5;
        border-radius: 4px;
      }

      .hostname {
        font-weight: 500;
        color: #1976d2;
      }

      .service {
        color: #666;
        font-size: 0.9rem;
      }

      .no-mappings {
        color: #999;
        font-style: italic;
      }

      mat-panel-title {
        display: flex;
        align-items: center;
      }
    `,
  ],
})
export class TunnelListComponent implements OnInit {
  @Input() tunnels: Tunnel[] = [];

  isLoading = false;
  mappingsLoading = false;
  expandedTunnelId: string | null = null;
  tunnelMappings: { [key: string]: Mapping[] } = {};

  constructor(private apiService: ApiService) {}

  ngOnInit(): void {}

  loadMappings(tunnelId: string): void {
    this.expandedTunnelId = tunnelId;
    this.mappingsLoading = true;

    this.apiService.getTunnelMappings(tunnelId).subscribe({
      next: (response) => {
        this.tunnelMappings[tunnelId] = response.data;
        this.mappingsLoading = false;
      },
      error: (err) => {
        console.error('Error loading mappings:', err);
        this.mappingsLoading = false;
      },
    });
  }
}