{% extends 'base.html' %}

{% block title %}Beitrag bearbeiten{% endblock %}

{% block extra_css %}
<style>
  .markdown-preview {
    min-height: 200px;
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.6;
  }
  .markdown-preview p {
    margin-bottom: 1rem;
  }
  .markdown-preview h1, .markdown-preview h2, .markdown-preview h3, 
  .markdown-preview h4, .markdown-preview h5, .markdown-preview h6 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
  }
  .markdown-preview h1 { font-size: 1.8rem; }
  .markdown-preview h2 { font-size: 1.5rem; }
  .markdown-preview h3 { font-size: 1.3rem; }
  .markdown-preview h4 { font-size: 1.1rem; }
  .markdown-preview ul, .markdown-preview ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
  }
  .markdown-preview ul { list-style-type: disc; }
  .markdown-preview ol { list-style-type: decimal; }
  .markdown-preview pre {
    background-color: rgba(0,0,0,0.05);
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 1rem 0;
  }
  .markdown-preview code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    padding: 0.1em 0.3em;
    border-radius: 0.3em;
    background-color: rgba(0,0,0,0.05);
  }
  .markdown-preview pre code {
    padding: 0;
    background-color: transparent;
  }
  .markdown-preview blockquote {
    border-left: 4px solid;
    padding-left: 1rem;
    margin-left: 0;
    margin-right: 0;
    margin-bottom: 1rem;
    opacity: 0.8;
  }
  .dark .markdown-preview code {
    background-color: rgba(255,255,255,0.1);
  }
  .dark .markdown-preview blockquote {
    border-color: rgba(255,255,255,0.2);
  }
  .node-mention {
    display: inline-flex;
    align-items: center;
    background-color: rgba(109, 40, 217, 0.1);
    color: #6d28d9;
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 0.9em;
    margin: 0 2px;
    font-weight: 500;
  }
  .dark .node-mention {
    background-color: rgba(167, 139, 250, 0.2);
    color: #a78bfa;
  }
</style>
{% endblock %}

{% block content %}
<div class="container mx-auto px-4 py-8">
  <!-- Breadcrumb Navigation -->
  <div class="mb-6 flex items-center text-sm">
    <a href="{{ url_for('community') }}" class="opacity-75 hover:opacity-100 transition-opacity">
      <i class="fas fa-home mr-1"></i> Forum
    </a>
    <span class="mx-2 opacity-50">/</span>
    <a href="{{ url_for('forum_category', category_id=post.category_id) }}" class="opacity-75 hover:opacity-100 transition-opacity">
      {{ post.category.title }}
    </a>
    <span class="mx-2 opacity-50">/</span>
    {% if post.parent_id %}
    <a href="{{ url_for('forum_post', post_id=post.parent_id) }}" class="opacity-75 hover:opacity-100 transition-opacity truncate max-w-[200px]">
      {{ post.parent.title }}
    </a>
    <span class="mx-2 opacity-50">/</span>
    {% endif %}
    <span class="font-medium">Beitrag bearbeiten</span>
  </div>
  
  <!-- Formular-Header -->
  <div class="mb-6">
    <h1 class="text-2xl font-bold mb-2">Beitrag bearbeiten</h1>
    <p class="opacity-75">
      {% if post.parent_id %}
      Antwort auf <span class="font-medium">{{ post.parent.title }}</span>
      {% else %}
      in der Kategorie <span class="font-medium">{{ post.category.title }}</span>
      {% endif %}
    </p>
  </div>
  
  <!-- Formular -->
  <div class="mb-8 rounded-xl overflow-hidden"
       x-bind:class="darkMode ? 'bg-gray-800/60 border border-white/10' : 'bg-white border border-gray-200'">
    <div class="p-4 border-b font-medium" x-bind:class="darkMode ? 'border-white/10' : 'border-gray-200'">
      <i class="fas fa-edit mr-2"></i>
      Beitrag bearbeiten
    </div>
    <div class="p-6">
      <form action="{{ url_for('edit_post', post_id=post.id) }}" method="POST" x-data="{ 
        title: '{{ post.title|safe }}', 
        content: '{{ post.content|replace('\n', '\\n')|replace('\'', '\\\'')|safe }}',
        showPreview: false,
        previewHtml: '',
        
        updatePreview() {
          // Verarbeite den Inhalt
          if (this.content.trim() === '') {
            this.previewHtml = '<div class=\'opacity-50 italic\'>Die Vorschau wird hier angezeigt...</div>';
            return;
          }
          
          // Verarbeite Markdown
          let html = marked.parse(this.content);
          
          // Ersetze @Knotenname mit entsprechenden Links
          html = html.replace(/@([a-zA-Z0-9äöüÄÖÜß_-]+)/g, '<span class=\'node-mention\'><i class=\'fas fa-diagram-project fa-xs mr-1\'></i>$1</span>');
          
          this.previewHtml = html;
        }
      }">
        <div class="mb-6">
          <label for="title" class="block mb-2 font-medium">Titel</label>
          <div class="rounded-lg overflow-hidden"
               x-bind:class="darkMode ? 'border border-white/20' : 'border border-gray-300'">
            <input type="text" id="title" name="title" 
                  class="w-full px-4 py-3" 
                  x-bind:class="darkMode 
                  ? 'bg-gray-700/50 text-white placeholder-gray-400 focus:border-indigo-500' 
                  : 'bg-white text-gray-700 placeholder-gray-400 focus:border-indigo-500'"
                  x-model="title"
                  required>
          </div>
        </div>
        
        <div class="mb-6">
          <div class="flex justify-between items-center mb-2">
            <label for="content" class="font-medium">Inhalt</label>
            <div class="flex space-x-2">
              <button type="button"
                     class="px-3 py-1 rounded text-sm flex items-center"
                     x-bind:class="darkMode 
                     ? 'bg-gray-700 hover:bg-gray-600 text-white' 
                     : 'bg-gray-200 hover:bg-gray-300 text-gray-700'"
                     @click="showPreview = false"
                     x-bind:disabled="!showPreview"
                     x-bind:class="{'opacity-50': !showPreview}">
                <i class="fas fa-edit mr-1"></i> Bearbeiten
              </button>
              <button type="button"
                     class="px-3 py-1 rounded text-sm flex items-center"
                     x-bind:class="darkMode 
                     ? 'bg-gray-700 hover:bg-gray-600 text-white' 
                     : 'bg-gray-200 hover:bg-gray-300 text-gray-700'"
                     @click="updatePreview(); showPreview = true"
                     x-bind:disabled="showPreview"
                     x-bind:class="{'opacity-50': showPreview}">
                <i class="fas fa-eye mr-1"></i> Vorschau
              </button>
            </div>
          </div>
          
          <!-- Editor -->
          <div class="rounded-lg overflow-hidden mb-2"
               x-bind:class="darkMode ? 'border border-white/20' : 'border border-gray-300'"
               x-show="!showPreview">
            <textarea id="content" name="content" rows="12" 
                     class="w-full p-3 resize-y"
                     x-bind:class="darkMode 
                     ? 'bg-gray-700/50 text-white placeholder-gray-400 focus:border-indigo-500' 
                     : 'bg-white text-gray-700 placeholder-gray-400 focus:border-indigo-500'"
                     x-model="content"
                     required></textarea>
          </div>
          
          <!-- Preview -->
          <div class="rounded-lg overflow-hidden mb-2 p-4 markdown-preview"
               x-bind:class="darkMode 
               ? 'border border-white/20 bg-gray-700/30' 
               : 'border border-gray-300 bg-gray-50'"
               x-show="showPreview"
               x-html="previewHtml">
          </div>
          
          <!-- Markdown-Hilfsmittel -->
          <div class="mb-4" x-show="!showPreview">
            <div class="text-xs opacity-70">
              <p>Du kannst Knotenpunkte der Mindmap durch <code>@Knotenname</code> verlinken.</p>
              <p>Dieser Editor unterstützt Markdown-Formatierung:</p>
              <div class="flex flex-wrap gap-2 mt-1">
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format="**" data-before="" data-after="" title="Fett">
                  <i class="fas fa-bold"></i>
                </button>
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format="*" data-before="" data-after="" title="Kursiv">
                  <i class="fas fa-italic"></i>
                </button>
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format="`" data-before="" data-after="" title="Code">
                  <i class="fas fa-code"></i>
                </button>
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format="[Link-Text](URL)" data-before="" data-after="" title="Link">
                  <i class="fas fa-link"></i>
                </button>
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format="\n```\nCode-Block\n```" data-before="" data-after="" title="Code-Block">
                  <i class="fas fa-file-code"></i>
                </button>
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format=">" data-before="" data-after="" title="Zitat">
                  <i class="fas fa-quote-right"></i>
                </button>
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format="- " data-before="" data-after="" title="Liste">
                  <i class="fas fa-list-ul"></i>
                </button>
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format="1. " data-before="" data-after="" title="Nummerierte Liste">
                  <i class="fas fa-list-ol"></i>
                </button>
                <button type="button" class="markdown-button px-2 py-1 rounded text-xs" data-format="# " data-before="" data-after="" title="Überschrift">
                  <i class="fas fa-heading"></i>
                </button>
              </div>
            </div>
          </div>
        </div>
        
        <div class="flex justify-between items-center">
          <a href="{{ url_for('forum_post', post_id=post.parent_id or post.id) }}" 
             class="px-5 py-2.5 rounded-lg transition-all duration-300 flex items-center"
             x-bind:class="darkMode 
             ? 'bg-gray-700 hover:bg-gray-600 text-white' 
             : 'bg-gray-200 hover:bg-gray-300 text-gray-700'">
            Abbrechen
          </a>
          <button type="submit" 
                 class="px-5 py-2.5 rounded-lg transition-all duration-300 flex items-center"
                 x-bind:class="darkMode 
                 ? 'bg-indigo-700 hover:bg-indigo-600 text-white' 
                 : 'bg-indigo-500 hover:bg-indigo-600 text-white'">
            <i class="fas fa-save mr-2"></i>
            Änderungen speichern
          </button>
        </div>
      </form>
    </div>
  </div>
</div>
{% endblock %}

{% block scripts %}
<script>
  document.addEventListener('DOMContentLoaded', function() {
    // Markdown-Buttons für den Beitragseditor
    document.querySelectorAll('.markdown-button').forEach(button => {
      button.addEventListener('click', function() {
        const textarea = document.getElementById('content');
        const format = this.dataset.format;
        const before = this.dataset.before || '';
        const after = this.dataset.after || '';
        
        // Hole die aktuelle Auswahl
        const start = textarea.selectionStart;
        const end = textarea.selectionEnd;
        const selection = textarea.value.substring(start, end);
        
        // Wende die Formatierung an
        let formattedText;
        if (format.includes('\n')) {
          // Für Formate mit Zeilenumbrüchen (z.B. Code-Blöcke)
          formattedText = format.replace('Code-Block', selection || 'Code-Block');
        } else if (format.includes('[Link-Text](URL)')) {
          formattedText = format.replace('Link-Text', selection || 'Link-Text');
        } else if (format === '- ' || format === '1. ' || format === '# ' || format === '> ') {
          // Für Listen und Überschriften: am Anfang der Zeile einfügen
          const beforeSelection = textarea.value.substring(0, start);
          const afterSelection = textarea.value.substring(end);
          
          // Finde den Anfang der aktuellen Zeile
          const lastNewline = beforeSelection.lastIndexOf('\n');
          const lineStart = lastNewline === -1 ? 0 : lastNewline + 1;
          
          // Füge das Format am Zeilenanfang ein
          formattedText = beforeSelection.substring(0, lineStart) + 
                         format + 
                         beforeSelection.substring(lineStart) + 
                         selection + 
                         afterSelection;
          
          // Setze die neue Cursor-Position
          const newCursorPos = end + format.length;
          textarea.value = formattedText;
          textarea.setSelectionRange(newCursorPos, newCursorPos);
          
          // Alpine.js Model aktualisieren
          textarea.dispatchEvent(new Event('input'));
          return; // Früher zurückkehren, da wir die Formatierung bereits angewendet haben
        } else {
          // Für einfache Formatierungen wie fett, kursiv, Code
          formattedText = before + format + selection + format + after;
        }
        
        // Ersetze den Text
        textarea.value = textarea.value.substring(0, start) + formattedText + textarea.value.substring(end);
        
        // Setze den Fokus zurück auf das Textarea
        textarea.focus();
        
        // Alpine.js Model aktualisieren
        textarea.dispatchEvent(new Event('input'));
        
        // Setze die Auswahl neu, wenn es eine Auswahl gab
        if (selection) {
          const newStart = start + before.length + format.length;
          const newEnd = newStart + selection.length;
          textarea.setSelectionRange(newStart, newEnd);
        } else {
          // Setze den Cursor in die Mitte von **|** oder `|`
          const newCursorPos = start + before.length + format.length;
          textarea.setSelectionRange(newCursorPos, newCursorPos);
        }
      });
    });
  });
</script>
{% endblock %}