import { Component, inject, signal, OnInit, effect } from '@angular/core';
import { ActivatedRoute, Router, RouterLink } from '@angular/router';
import { ApiService } from '../../core/services/api.service';
import { ToastService } from '../../core/services/toast.service';
import { WebSocketService } from '../../core/services/websocket.service';
import { IPlatformService, IContainerStats, TPlatformServiceType } from '../../core/types/api.types';
import {
  CardComponent,
  CardHeaderComponent,
  CardTitleComponent,
  CardDescriptionComponent,
  CardContentComponent,
} from '../../ui/card/card.component';
import { ButtonComponent } from '../../ui/button/button.component';
import { BadgeComponent } from '../../ui/badge/badge.component';
import { SkeletonComponent } from '../../ui/skeleton/skeleton.component';

@Component({
  selector: 'app-platform-service-detail',
  standalone: true,
  imports: [
    RouterLink,
    CardComponent,
    CardHeaderComponent,
    CardTitleComponent,
    CardDescriptionComponent,
    CardContentComponent,
    ButtonComponent,
    BadgeComponent,
    SkeletonComponent,
  ],
  template: `
    <div class="space-y-6">
      <!-- Header -->
      <div>
        <a routerLink="/services" class="text-sm text-muted-foreground hover:text-foreground inline-flex items-center gap-1 mb-2">
          <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="M15 19l-7-7 7-7" />
          </svg>
          Back to Services
        </a>

        @if (loading() && !service()) {
          <ui-skeleton class="h-9 w-48" />
        } @else if (service()) {
          <div class="flex items-center gap-4">
            <h1 class="text-3xl font-bold tracking-tight">{{ service()!.displayName }}</h1>
            <ui-badge [variant]="getStatusVariant(service()!.status)">{{ service()!.status }}</ui-badge>
            @if (service()!.isCore) {
              <ui-badge variant="outline">Core Service</ui-badge>
            }
          </div>
        }
      </div>

      @if (loading() && !service()) {
        <div class="grid gap-6 md:grid-cols-2">
          <ui-card>
            <ui-card-header class="flex flex-col space-y-1.5">
              <ui-skeleton class="h-6 w-32" />
            </ui-card-header>
            <ui-card-content class="space-y-4">
              @for (_ of [1,2,3]; track $index) {
                <ui-skeleton class="h-4 w-full" />
              }
            </ui-card-content>
          </ui-card>
        </div>
      } @else if (service()) {
        <div class="grid gap-6 md:grid-cols-2">
          <!-- Service Details -->
          <ui-card>
            <ui-card-header class="flex flex-col space-y-1.5">
              <ui-card-title>Service Details</ui-card-title>
              <ui-card-description>Platform service information</ui-card-description>
            </ui-card-header>
            <ui-card-content>
              <dl class="space-y-4">
                <div>
                  <dt class="text-sm font-medium text-muted-foreground">Type</dt>
                  <dd class="text-sm">{{ service()!.type }}</dd>
                </div>
                <div>
                  <dt class="text-sm font-medium text-muted-foreground">Resource Types</dt>
                  <dd class="text-sm">
                    <div class="flex flex-wrap gap-1 mt-1">
                      @for (type of service()!.resourceTypes; track type) {
                        <ui-badge variant="outline">{{ type }}</ui-badge>
                      }
                    </div>
                  </dd>
                </div>
                @if (service()!.containerId) {
                  <div>
                    <dt class="text-sm font-medium text-muted-foreground">Container ID</dt>
                    <dd class="text-sm font-mono">{{ service()!.containerId?.slice(0, 12) }}</dd>
                  </div>
                }
                @if (service()!.createdAt) {
                  <div>
                    <dt class="text-sm font-medium text-muted-foreground">Created</dt>
                    <dd class="text-sm">{{ formatDate(service()!.createdAt!) }}</dd>
                  </div>
                }
              </dl>
            </ui-card-content>
          </ui-card>

          <!-- Actions -->
          <ui-card>
            <ui-card-header class="flex flex-col space-y-1.5">
              <ui-card-title>Actions</ui-card-title>
              <ui-card-description>Manage platform service state</ui-card-description>
            </ui-card-header>
            <ui-card-content class="space-y-4">
              @if (service()!.isCore) {
                <p class="text-sm text-muted-foreground">
                  This is a core service managed by Onebox. It cannot be stopped manually.
                </p>
              } @else {
                <div class="flex flex-wrap gap-2">
                  @if (service()!.status === 'stopped' || service()!.status === 'not-deployed' || service()!.status === 'failed') {
                    <button uiButton (click)="startService()" [disabled]="actionLoading()">
                      @if (actionLoading()) {
                        <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 12h4z"></path>
                        </svg>
                      }
                      Start Service
                    </button>
                  }
                  @if (service()!.status === 'running') {
                    <button uiButton variant="outline" (click)="stopService()" [disabled]="actionLoading()">
                      Stop Service
                    </button>
                  }
                </div>
              }
            </ui-card-content>
          </ui-card>

          <!-- Resource Stats (only shown when service is running) -->
          @if (service()!.status === 'running' && stats()) {
            <ui-card>
              <ui-card-header class="flex flex-col space-y-1.5">
                <ui-card-title>Resource Usage</ui-card-title>
                <ui-card-description>
                  <span class="flex items-center gap-2">
                    <span class="relative flex h-2 w-2">
                      <span class="animate-ping absolute inline-flex h-full w-full rounded-full bg-green-400 opacity-75"></span>
                      <span class="relative inline-flex rounded-full h-2 w-2 bg-green-500"></span>
                    </span>
                    Live stats
                  </span>
                </ui-card-description>
              </ui-card-header>
              <ui-card-content>
                <div class="grid grid-cols-2 gap-4">
                  <!-- CPU -->
                  <div class="space-y-2">
                    <div class="flex items-center justify-between text-sm">
                      <span class="text-muted-foreground">CPU</span>
                      <span class="font-medium">{{ formatPercent(stats()!.cpuPercent) }}</span>
                    </div>
                    <div class="h-2 bg-muted rounded-full overflow-hidden">
                      <div class="h-full bg-primary transition-all duration-300" [style.width.%]="stats()!.cpuPercent"></div>
                    </div>
                  </div>

                  <!-- Memory -->
                  <div class="space-y-2">
                    <div class="flex items-center justify-between text-sm">
                      <span class="text-muted-foreground">Memory</span>
                      <span class="font-medium">{{ formatBytes(stats()!.memoryUsed) }} / {{ formatBytes(stats()!.memoryLimit) }}</span>
                    </div>
                    <div class="h-2 bg-muted rounded-full overflow-hidden">
                      <div class="h-full bg-primary transition-all duration-300" [style.width.%]="stats()!.memoryPercent"></div>
                    </div>
                  </div>

                  <!-- Network RX -->
                  <div class="space-y-1">
                    <div class="flex items-center justify-between text-sm">
                      <span class="text-muted-foreground">Network In</span>
                      <span class="font-medium">{{ formatBytes(stats()!.networkRx) }}</span>
                    </div>
                  </div>

                  <!-- Network TX -->
                  <div class="space-y-1">
                    <div class="flex items-center justify-between text-sm">
                      <span class="text-muted-foreground">Network Out</span>
                      <span class="font-medium">{{ formatBytes(stats()!.networkTx) }}</span>
                    </div>
                  </div>
                </div>
              </ui-card-content>
            </ui-card>
          }

          <!-- Service Description -->
          <ui-card>
            <ui-card-header class="flex flex-col space-y-1.5">
              <ui-card-title>About {{ service()!.displayName }}</ui-card-title>
            </ui-card-header>
            <ui-card-content>
              <p class="text-sm text-muted-foreground">{{ getServiceDescription(service()!.type) }}</p>
            </ui-card-content>
          </ui-card>
        </div>
      }
    </div>
  `,
})
export class PlatformServiceDetailComponent implements OnInit {
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private api = inject(ApiService);
  private toast = inject(ToastService);
  private ws = inject(WebSocketService);

  service = signal<IPlatformService | null>(null);
  stats = signal<IContainerStats | null>(null);
  loading = signal(false);
  actionLoading = signal(false);

  private statsInterval: any;

  constructor() {
    // Listen for WebSocket stats updates for platform services
    effect(() => {
      const update = this.ws.statsUpdate();
      const currentService = this.service();
      // Platform services use "onebox-{type}" as service name in WebSocket
      if (update && currentService && update.serviceName === `onebox-${currentService.type}`) {
        this.stats.set(update.stats);
      }
    });
  }

  ngOnInit(): void {
    const type = this.route.snapshot.paramMap.get('type') as TPlatformServiceType;
    if (type) {
      this.loadService(type);
    }
  }

  async loadService(type: TPlatformServiceType): Promise<void> {
    this.loading.set(true);
    try {
      const response = await this.api.getPlatformService(type);
      if (response.success && response.data) {
        this.service.set(response.data);
        // Load stats if service is running
        if (response.data.status === 'running') {
          this.loadStats(type);
          // Start polling stats every 5 seconds
          this.startStatsPolling(type);
        }
      } else {
        this.toast.error(response.error || 'Platform service not found');
        this.router.navigate(['/services']);
      }
    } catch {
      this.toast.error('Failed to load platform service');
    } finally {
      this.loading.set(false);
    }
  }

  async loadStats(type: TPlatformServiceType): Promise<void> {
    try {
      const response = await this.api.getPlatformServiceStats(type);
      if (response.success && response.data) {
        this.stats.set(response.data);
      }
    } catch {
      // Silent fail - stats are optional
    }
  }

  startStatsPolling(type: TPlatformServiceType): void {
    // Clear existing interval if any
    if (this.statsInterval) {
      clearInterval(this.statsInterval);
    }
    // Poll every 5 seconds
    this.statsInterval = setInterval(() => {
      if (this.service()?.status === 'running') {
        this.loadStats(type);
      }
    }, 5000);
  }

  getStatusVariant(status: string): 'success' | 'destructive' | 'warning' | 'secondary' {
    switch (status) {
      case 'running': return 'success';
      case 'stopped':
      case 'not-deployed': return 'secondary';
      case 'failed': return 'destructive';
      case 'starting':
      case 'stopping': return 'warning';
      default: return 'secondary';
    }
  }

  formatDate(timestamp: number): string {
    return new Date(timestamp).toLocaleString();
  }

  formatBytes(bytes: number): string {
    if (bytes === 0) return '0 B';
    const k = 1024;
    const sizes = ['B', 'KB', 'MB', 'GB', 'TB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    return parseFloat((bytes / Math.pow(k, i)).toFixed(1)) + ' ' + sizes[i];
  }

  formatPercent(value: number): string {
    return value.toFixed(1) + '%';
  }

  getServiceDescription(type: TPlatformServiceType): string {
    const descriptions: Record<TPlatformServiceType, string> = {
      mongodb: 'MongoDB is a document-oriented NoSQL database used for high volume data storage. It stores data in flexible, JSON-like documents.',
      minio: 'MinIO is a high-performance, S3-compatible object storage service. Use it to store unstructured data like photos, videos, log files, and backups.',
      redis: 'Redis is an in-memory data structure store, used as a distributed cache, message broker, and key-value database.',
      postgresql: 'PostgreSQL is a powerful, open-source object-relational database system with over 35 years of active development.',
      rabbitmq: 'RabbitMQ is a message broker that enables applications to communicate with each other using messages through queues.',
      caddy: 'Caddy is a powerful, enterprise-ready, open-source web server with automatic HTTPS. It serves as the reverse proxy for Onebox.',
    };
    return descriptions[type] || 'A platform service managed by Onebox.';
  }

  async startService(): Promise<void> {
    const type = this.service()?.type;
    if (!type) return;

    this.actionLoading.set(true);
    try {
      const response = await this.api.startPlatformService(type);
      if (response.success) {
        this.toast.success('Platform service started');
        this.loadService(type);
      } else {
        this.toast.error(response.error || 'Failed to start platform service');
      }
    } catch {
      this.toast.error('Failed to start platform service');
    } finally {
      this.actionLoading.set(false);
    }
  }

  async stopService(): Promise<void> {
    const type = this.service()?.type;
    if (!type) return;

    this.actionLoading.set(true);
    try {
      const response = await this.api.stopPlatformService(type);
      if (response.success) {
        this.toast.success('Platform service stopped');
        // Clear stats and stop polling
        this.stats.set(null);
        if (this.statsInterval) {
          clearInterval(this.statsInterval);
          this.statsInterval = null;
        }
        this.loadService(type);
      } else {
        this.toast.error(response.error || 'Failed to stop platform service');
      }
    } catch {
      this.toast.error('Failed to stop platform service');
    } finally {
      this.actionLoading.set(false);
    }
  }
}