{% extends "base.html" %}

{% block content %}
<article>
  <header>
    <h1>🌲 Crumbforest Chat</h1>
    <p>Wähle deinen Gesprächspartner und stelle deine Fragen!</p>
  </header>

  <!-- Character Selection -->
  <section id="character-selection" style="display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; margin-bottom: 2rem;">
    <article class="character-card" data-character="eule" style="cursor: pointer; border: 2px solid transparent; transition: all 0.3s;">
      <header style="text-align: center;">
        <h2 style="font-size: 3rem; margin: 0;">🦉</h2>
        <h3 style="margin: 0.5rem 0;">Krümeleule</h3>
      </header>
      <p style="text-align: center; color: var(--pico-muted-color);">
        Weise und geduldig. Erklärt die Welt mit Ruhe und Respekt.
      </p>
    </article>

    <article class="character-card" data-character="fox" style="cursor: pointer; border: 2px solid transparent; transition: all 0.3s;">
      <header style="text-align: center;">
        <h2 style="font-size: 3rem; margin: 0;">🦊</h2>
        <h3 style="margin: 0.5rem 0;">FunkFox</h3>
      </header>
      <p style="text-align: center; color: var(--pico-muted-color);">
        Der rappende Bit! Erklärt Tech mit Beats und Reimen.
      </p>
    </article>

    <article class="character-card" data-character="bugsy" style="cursor: pointer; border: 2px solid transparent; transition: all 0.3s;">
      <header style="text-align: center;">
        <h2 style="font-size: 3rem; margin: 0;">🐞</h2>
        <h3 style="margin: 0.5rem 0;">Bugsy</h3>
      </header>
      <p style="text-align: center; color: var(--pico-muted-color);">
        Fehler ohne Scham. Macht Debugging zu einer Lernchance.
      </p>
    </article>
  </section>

  <!-- Chat Interface -->
  <section id="chat-interface" style="display: none;">
    <header style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem;">
      <div>
        <h2 id="current-character-name" style="margin: 0;">Character</h2>
        <p id="current-character-emoji" style="font-size: 2rem; margin: 0;">🦉</p>
      </div>
      <button id="change-character-btn" class="outline secondary">Character wechseln</button>
    </header>

    <!-- Chat Messages -->
    <div id="chat-messages" style="min-height: 300px; max-height: 500px; overflow-y: auto; padding: 1rem; background: var(--pico-card-background-color); border-radius: var(--pico-border-radius); margin-bottom: 1rem;">
      <p class="text-muted text-center">Stelle deine erste Frage! 🌱</p>
    </div>

    <!-- Input Form -->
    <form id="chat-form">
      <fieldset role="group">
        <input
          type="text"
          id="question-input"
          placeholder="Deine Frage..."
          required
          autocomplete="off"
        />
        <button type="submit" id="send-btn">Senden</button>
      </fieldset>
    </form>

    <!-- Loading Indicator -->
    <div id="loading" style="display: none; text-align: center; margin-top: 1rem;">
      <progress></progress>
      <p class="text-muted">Dein Character denkt nach...</p>
    </div>
  </section>
</article>

<style>
  .character-card:hover {
    border-color: var(--brand-color) !important;
    transform: scale(1.02);
  }

  .character-card.selected {
    border-color: var(--brand-color) !important;
    background: rgba(16, 185, 129, 0.05);
  }

  .message {
    margin-bottom: 1.5rem;
    padding: 1rem;
    border-radius: var(--pico-border-radius);
    animation: fadeIn 0.3s ease-out;
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(0.5rem);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .message-user {
    background: var(--pico-primary-background);
    border-left: 4px solid var(--pico-primary);
  }

  .message-character {
    background: var(--pico-card-background-color);
    border-left: 4px solid var(--brand-color);
  }

  .message-header {
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .message-content {
    white-space: pre-wrap;
    line-height: 1.6;
  }

  .sources {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--pico-muted-border-color);
    font-size: 0.875rem;
    color: var(--pico-muted-color);
  }

  .sources ul {
    margin: 0.5rem 0 0 0;
    padding-left: 1.5rem;
  }

  .sources li {
    margin-bottom: 0.25rem;
  }
</style>

<script>
  const API_URL = '/api/chat';
  let currentCharacter = null;

  // Character Selection
  document.querySelectorAll('.character-card').forEach(card => {
    card.addEventListener('click', () => {
      currentCharacter = card.dataset.character;
      startChat();
    });
  });

  // Change Character Button
  document.getElementById('change-character-btn').addEventListener('click', () => {
    document.getElementById('chat-interface').style.display = 'none';
    document.getElementById('character-selection').style.display = 'grid';
    document.getElementById('chat-messages').innerHTML = '<p class="text-muted text-center">Stelle deine erste Frage! 🌱</p>';
    currentCharacter = null;
  });

  function startChat() {
    // Update UI
    document.getElementById('character-selection').style.display = 'none';
    document.getElementById('chat-interface').style.display = 'block';

    // Update character info
    const characterInfo = {
      eule: { name: 'Krümeleule', emoji: '🦉' },
      fox: { name: 'FunkFox', emoji: '🦊' },
      bugsy: { name: 'Bugsy', emoji: '🐞' }
    };

    const info = characterInfo[currentCharacter];
    document.getElementById('current-character-name').textContent = info.name;
    document.getElementById('current-character-emoji').textContent = info.emoji;

    // Focus input
    document.getElementById('question-input').focus();
  }

  // Chat Form Submission
  document.getElementById('chat-form').addEventListener('submit', async (e) => {
    e.preventDefault();

    const input = document.getElementById('question-input');
    const question = input.value.trim();

    if (!question) return;

    // Add user message to chat
    addMessage('user', 'Du', question);

    // Clear input
    input.value = '';

    // Show loading
    document.getElementById('loading').style.display = 'block';
    document.getElementById('send-btn').disabled = true;

    try {
      // Send request to API
      const response = await fetch(API_URL, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          character_id: currentCharacter,
          question: question,
          lang: '{{ lang }}'
        })
      });

      if (!response.ok) {
        throw new Error(`API error: ${response.status}`);
      }

      const data = await response.json();

      // Add character response
      const characterInfo = {
        eule: { name: 'Krümeleule', emoji: '🦉' },
        fox: { name: 'FunkFox', emoji: '🦊' },
        bugsy: { name: 'Bugsy', emoji: '🐞' }
      };
      const info = characterInfo[currentCharacter];

      addMessage('character', `${info.emoji} ${info.name}`, data.answer, data.sources);

    } catch (error) {
      console.error('Chat error:', error);
      addMessage('error', '❌ Fehler', 'Entschuldigung, es gab einen Fehler. Bitte versuche es erneut.');
    } finally {
      // Hide loading
      document.getElementById('loading').style.display = 'none';
      document.getElementById('send-btn').disabled = false;
      input.focus();
    }
  });

  function addMessage(type, sender, content, sources = null) {
    const messagesDiv = document.getElementById('chat-messages');

    // Remove placeholder if exists
    if (messagesDiv.querySelector('.text-muted')) {
      messagesDiv.innerHTML = '';
    }

    const messageDiv = document.createElement('div');
    messageDiv.className = `message message-${type}`;

    let html = `
      <div class="message-header">${sender}</div>
      <div class="message-content">${escapeHtml(content)}</div>
    `;

    if (sources && sources.length > 0) {
      html += `
        <div class="sources">
          📚 Quellen (${sources.length}):
          <ul>
            ${sources.map(s => `<li>${escapeHtml(s.file_path)} (${s.score.toFixed(3)})</li>`).join('')}
          </ul>
        </div>
      `;
    }

    messageDiv.innerHTML = html;
    messagesDiv.appendChild(messageDiv);

    // Scroll to bottom
    messagesDiv.scrollTop = messagesDiv.scrollHeight;
  }

  function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
  }
</script>
{% endblock %}