// Sidebar Component

export function renderSidebar({ libraries, tags, selectedLibrary, selectedTag, onSelectLibrary, onSelectTag, onHome }) {
  const buildLibraryTree = (libs, parentId = null, depth = 0) => {
    return libs
      .filter(l => l.parentId === parentId)
      .map(lib => {
        const children = libs.filter(l => l.parentId === lib.id);
        const hasChildren = children.length > 0;
        const isSelected = selectedLibrary === lib.id;
        
        return `
          <div class="tree-node">
            <div class="tree-item ${isSelected ? 'active' : ''}" onclick="handleSelectLibrary('${lib.id}')">
              <span class="tree-toggle ${hasChildren ? 'expanded' : ''}" style="padding-left:${depth * 12}px">
                ${hasChildren ? '▶' : ''}
              </span>
              <span class="icon">📁</span>
              <span class="label">${escapeHtml(lib.name)}</span>
            </div>
            ${hasChildren ? `<div class="tree-children">${buildLibraryTree(libraries, lib.id, depth + 1)}</div>` : ''}
          </div>
        `;
      })
      .join('');
  };

  return `
    <aside class="sidebar">
      <div class="sidebar-scroll">
        <div class="sidebar-section">
          <h3>📚 Libraries</h3>
          <div class="library-tree">
            <div class="tree-item ${!selectedLibrary ? 'active' : ''}" onclick="handleHome()">
              <span class="icon">🏠</span>
              <span class="label">All Documents</span>
            </div>
            ${buildLibraryTree(libraries)}
          </div>
        </div>
        <div class="sidebar-section">
          <h3>🏷️ Tags</h3>
          <div class="tag-list">
            ${tags.map(tag => `
              <div class="tag-item ${selectedTag === tag.name ? 'active' : ''}" onclick="handleSelectTag('${escapeHtml(tag.name)}')">
                <span>#${escapeHtml(tag.name)}</span>
                <span class="tag-count">${tag.count}</span>
              </div>
            `).join('')}
          </div>
        </div>
        <div class="quick-links">
          <a class="quick-link" onclick="handleHome()">📋 All Documents</a>
          <a class="quick-link" onclick="window.app.navigate('editor')">+ New Document</a>
        </div>
      </div>
    </aside>
    <script>
      window.handleSelectLibrary = (id) => {
        ${onSelectLibrary ? `window.document.dispatchEvent(new CustomEvent('select-library', {detail: '${''}'}))` : ''}
      };
      window.handleSelectTag = (tag) => {
        ${onSelectTag ? `window.document.dispatchEvent(new CustomEvent('select-tag', {detail: tag}))` : ''}
      };
      window.handleHome = () => {
        ${onHome ? `window.document.dispatchEvent(new CustomEvent('go-home'))` : ''}
      };
      
      window.document.addEventListener('select-library', (e) => {
        ${onSelectLibrary ? onSelectLibrary.toString().replace(/\s+/g, ' ') : ''}
      });
      window.document.addEventListener('select-tag', (e) => {
        ${onSelectTag ? onSelectTag.toString().replace(/\s+/g, ' ') : ''}
      });
      window.document.addEventListener('go-home', (e) => {
        ${onHome ? onHome.toString().replace(/\s+/g, ' ') : ''}
      });
    </script>
  `;
}

function escapeHtml(str) {
  if (!str) return '';
  const div = document.createElement('div');
  div.textContent = str;
  return div.innerHTML;
}