import { Component, signal, computed, inject } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { MarkdownService } from '../../../../services/markdown.service';
import { HttpClient, HttpClientModule } from '@angular/common/http';
import { MarkdownViewerComponent } from '../../../../components/markdown-viewer/markdown-viewer.component';

const DEFAULT_MD_PATH = 'assets/samples/markdown-playground.md';
const DEFAULT_MD_PATH_ABS = '/assets/samples/markdown-playground.md';

@Component({
  selector: 'app-markdown-playground',
  standalone: true,
  imports: [CommonModule, FormsModule, HttpClientModule, MarkdownViewerComponent],
  template: `
    <div class="h-full flex flex-col bg-surface1 dark:bg-main">
      <!-- Header -->
      <header class="bg-card dark:bg-card border-b border-border dark:border-border px-6 py-4">
        <h1 class="text-2xl font-semibold text-main dark:text-gray-100">Markdown Playground</h1>
        <p class="text-sm text-muted dark:text-muted mt-1">
          Page de test interne pour valider tous les formatages Markdown supportés par ObsiViewer.
        </p>
      </header>

      <!-- Content -->
      <div class="flex-1 flex gap-4 p-4 overflow-hidden">
        <!-- Editor Panel -->
        <div class="flex-1 flex flex-col bg-card dark:bg-card rounded-lg border border-border dark:border-border overflow-hidden">
          <div class="px-4 py-2 border-b border-border dark:border-border bg-surface1 dark:bg-gray-750">
            <h2 class="text-sm font-semibold text-main dark:text-main">Markdown Source</h2>
          </div>
          <textarea
            [ngModel]="sample()"
            (ngModelChange)="sample.set($event)"
            class="flex-1 p-4 font-mono text-sm bg-card dark:bg-card text-main dark:text-gray-100 resize-none focus:outline-none"
            placeholder="Entrez votre Markdown ici..."
            spellcheck="false"
          ></textarea>
        </div>

        <!-- Preview Panel -->
        <div class="flex-1 flex flex-col bg-card dark:bg-card rounded-lg border border-border dark:border-border overflow-hidden">
          <div class="px-4 py-2 border-b border-border dark:border-border bg-surface1 dark:bg-gray-750 flex items-center justify-between">
            <h2 class="text-sm font-semibold text-main dark:text-main">Preview</h2>
            <div class="flex items-center gap-2">
              <button
                (click)="toggleViewMode()"
                class="text-xs px-3 py-1 rounded bg-surface2 dark:bg-surface2 hover:bg-muted dark:hover:bg-gray-600 text-main dark:text-main"
                title="Toggle between inline and component view"
              >
                {{ useComponentView() ? 'Inline View' : 'Component View' }}
              </button>
              <button
                (click)="resetToDefault()"
                class="text-xs px-3 py-1 rounded bg-surface2 dark:bg-surface2 hover:bg-muted dark:hover:bg-gray-600 text-main dark:text-main"
              >
                Reset
              </button>
            </div>
          </div>
          <div class="flex-1 overflow-auto" [class.p-4]="!useComponentView()">
            <!-- Component View -->
            <app-markdown-viewer
              *ngIf="useComponentView()"
              [content]="sample()"
              [allNotes]="[]"
              [showToolbar]="false"
              [fullscreenMode]="false">
            </app-markdown-viewer>
            
            <!-- Inline View -->
            <div
              *ngIf="!useComponentView()"
              class="md-view"
              [innerHTML]="renderedHtml()"
            ></div>
          </div>
        </div>
      </div>
    </div>
  `,
  styles: [`
    :host {
      display: block;
      height: 100%;
    }

    textarea {
      tab-size: 2;
    }

    textarea::-webkit-scrollbar {
      width: 8px;
      height: 8px;
    }

    textarea::-webkit-scrollbar-track {
      background: transparent;
    }

    textarea::-webkit-scrollbar-thumb {
      background: rgba(0, 0, 0, 0.2);
      border-radius: 4px;
    }

    textarea::-webkit-scrollbar-thumb:hover {
      background: rgba(0, 0, 0, 0.3);
    }

    .dark textarea::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.2);
    }

    .dark textarea::-webkit-scrollbar-thumb:hover {
      background: rgba(255, 255, 255, 0.3);
    }
  `]
})
export class MarkdownPlaygroundComponent {
  private markdownService = inject(MarkdownService);
  private http = inject(HttpClient);

  sample = signal<string>('');
  useComponentView = signal<boolean>(true);

  renderedHtml = computed(() => {
    const markdown = this.sample();
    try {
      return this.markdownService.render(markdown, [], undefined);
    } catch (error) {
      console.error('Markdown render error:', error);
      return `<div class="text-red-500">Erreur de rendu: ${error}</div>`;
    }
  });

  constructor() {
    this.loadDefaultSample();
  }

  private loadDefaultSample(): void {
    this.http.get(DEFAULT_MD_PATH, { responseType: 'text' }).subscribe({
      next: (text) => this.sample.set(text ?? ''),
      error: (err) => {
        console.warn('Fallback: retry loading default markdown via absolute path', err);
        this.http.get(DEFAULT_MD_PATH_ABS, { responseType: 'text' }).subscribe({
          next: (text) => this.sample.set(text ?? ''),
          error: (err2) => {
            console.error('Failed to load default markdown (both paths):', err2);
            this.sample.set('');
          }
        });
      }
    });
  }

  resetToDefault(): void {
    this.loadDefaultSample();
  }

  toggleViewMode(): void {
    this.useComponentView.update(v => !v);
  }
}