/**
 * API-Client für HTTP-Kommunikation mit dem Backend.
 */

/**
 * Template-Inhalt laden und anzeigen
 * @param {string} path - Pfad zur Template-Datei
 */
async function viewTemplate(path) {
  try {
    const response = await fetch(path);
    if (!response.ok) throw new Error('Datei nicht gefunden');

    let content = await response.text();

    // Für JSON: formatiert anzeigen
    if (path.endsWith('.json')) {
      try {
        const data = JSON.parse(content);
        content = JSON.stringify(data, null, 2);
      } catch (e) {
        // Nicht valides JSON, als Raw Text anzeigen
      }
    }

    showModal(path.split('/').pop(), content);
  } catch (e) {
    showModal(path, `Fehler beim Laden: ${e.message}`);
  }
}

/**
 * Template-Inhalt kopieren
 * @param {string} path - Pfad zur Template-Datei
 */
async function copyContent(path) {
  try {
    const response = await fetch(path);
    if (!response.ok) throw new Error('Datei nicht gefunden');

    let content = await response.text();

    // Für JSON: originalen Inhalt (nicht formatiert) kopieren
    if (path.endsWith('.json')) {
      try {
        JSON.parse(content);
        // Valides JSON - originalen Inhalt behalten
      } catch (e) {
        // Nicht valides JSON
      }
    }

    await copyContentToClipboard(content);
  } catch (e) {
    showToast(`✗ Fehler: ${e.message}`);
  }
}

/**
 * Template-Daten vom Server laden
 * @returns {Promise<Array>} Template-Liste
 */
async function loadTemplates() {
  const response = await fetch('/templates.json');
  if (!response.ok) {
    return await scanTemplates();
  }
  return response.json();
}

/**
 * Templates manuell scannen (Fallback wenn templates.json fehlt)
 * @returns {Promise<Array>} Template-Liste
 */
async function scanTemplates() {
  const templates = [];
  const systemFiles = ['commit_analysis', 'code_reviewer', 'summarizer'];
  for (const file of systemFiles) {
    try {
      const response = await fetch(`/templates/system/${file}.json`);
      if (response.ok) {
        const data = await response.json();
        templates.push({
          path: `/templates/system/${file}.json`,
          type: 'system',
          name: data.name || file,
          description: data.description || '',
          version: data.version || '1.0',
          tags: data.tags || [],
          format: 'json'
        });
      }
    } catch (e) {}
  }

  const userFiles = ['email_draft', 'brainstorming'];
  for (const file of userFiles) {
    try {
      const response = await fetch(`/templates/user/${file}.md`);
      if (response.ok) {
        const text = await response.text();
        const name = text.split('\n')[0].replace('# ', '');
        templates.push({
          path: `/templates/user/${file}.md`,
          type: 'user',
          name: name,
          description: '',
          version: '1.0',
          tags: [],
          format: 'md'
        });
      }
    } catch (e) {}
  }

  return templates;
}

/**
 * Bearbeiteten Inhalt speichern
 */
async function saveEditedContent() {
  if (!window.currentEditTemplate) return;

  try {
    if (window.currentEditTemplate.endsWith('.json')) {
      const editContainer = document.getElementById('edit-content-content');
      const firstChild = editContainer.children[0];
      const formDiv = (firstChild && firstChild.nodeType === Node.ELEMENT_NODE && firstChild.tagName === 'DIV') ? firstChild : null;
      if (!formDiv) {
        showToast('✗ Keine Eingabefelder gefunden');
        return;
      }

      const updatedData = extractJsonFromForm(formDiv);
      const finalJsonString = JSON.stringify(updatedData, null, window.currentIndent);

      // Valid JSON prüfen
      try {
        JSON.parse(finalJsonString);
      } catch (e) {
        showToast('✗ Ungültiges JSON. Bitte korrigiere den Inhalt.');
        return;
      }

      const response = await fetch(window.currentEditTemplate, {
        method: 'PUT',
        headers: {'Content-Type': 'text/plain'},
        body: finalJsonString
      });

      if (response.ok) {
        showToast('✓ Änderungen gespeichert');
        closeEditModal();
        if (wasViewModalOpen()) {
          closeModal();
        }
        await viewTemplate(window.currentEditTemplate);
      } else {
        throw new Error(`HTTP ${response.status}`);
      }
    } else {
      const textarea = document.getElementById('edit-textarea');
      const content = textarea.value;

      const response = await fetch(window.currentEditTemplate, {
        method: 'PUT',
        headers: {'Content-Type': 'text/plain'},
        body: content
      });

      if (response.ok) {
        showToast('✓ Änderungen gespeichert');
        closeEditModal();
        if (wasViewModalOpen()) {
          closeModal();
        }
        await viewTemplate(window.currentEditTemplate);
      } else {
        throw new Error(`HTTP ${response.status}`);
      }
    }
  } catch (e) {
    showToast(`✗ Fehler beim Speichern: ${e.message}`);
  }
}