// Config Sidebar - Handles sidebar population and navigation
class ConfigSidebar {
  constructor() {
    this.categoriesList = null;
  }

  populateSidebar() {
    
    this.categoriesList = document.getElementById('config-categories-list');
    if (!this.categoriesList) {
      console.error('ConfigSidebar: config-categories-list element not found');
      return;
    }

    if (!window.configData || !window.configData.categories) {
      console.error('ConfigSidebar: No config data available for sidebar');
      return;
    }

    this.categoriesList.innerHTML = '';

    // Overview — the Admin landing (an ops/health board, not a config form).
    const overviewItem = document.createElement('div');
    overviewItem.className = 'category';
    overviewItem.setAttribute('data-category', 'overview');
    overviewItem.innerHTML = '<svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="currentColor" stroke-width="2" style="margin-right:8px;vertical-align:middle"><rect x="3" y="3" width="7" height="9"></rect><rect x="14" y="3" width="7" height="5"></rect><rect x="14" y="12" width="7" height="9"></rect><rect x="3" y="16" width="7" height="5"></rect></svg> Dashboard';
    overviewItem.addEventListener('click', function () {
      window.history.pushState({}, '', window.adminPath('overview'));
      document.querySelectorAll('.category').forEach(function (item) { item.classList.remove('active'); });
      this.classList.add('active');
      window.configCategory = 'overview';
      if (window.configManager && typeof window.configManager.renderConfig === 'function') {
        window.configManager.renderConfig('overview');
      }
    });
    this.categoriesList.appendChild(overviewItem);

    // System sits right under Overview — both are admin-landing surfaces
    // (Overview = ops/health summary, System = live host + per-app stats),
    // distinct from the config form pages or the Tools utilities below.
    const systemItem = document.createElement('div');
    systemItem.className = 'category';
    systemItem.setAttribute('data-category', 'system');
    systemItem.innerHTML = '<svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="currentColor" stroke-width="2" style="margin-right:8px;vertical-align:middle"><polyline points="22 12 18 12 15 21 9 3 6 12 2 12"></polyline></svg> System';
    systemItem.addEventListener('click', function () {
      window.history.pushState({}, '', window.adminPath('system'));
      document.querySelectorAll('.category').forEach(function (item) { item.classList.remove('active'); });
      this.classList.add('active');
      window.configCategory = 'system';
      if (window.configManager && typeof window.configManager.renderConfig === 'function') {
        window.configManager.renderConfig('system');
      }
    });
    this.categoriesList.appendChild(systemItem);

    // "Config" group heading above the configuration categories (mirrors the
    // "Tools" heading below).
    const configLabel = document.createElement('div');
    configLabel.className = 'sidebar-group-label';
    configLabel.textContent = 'Config';
    this.categoriesList.appendChild(configLabel);

    // Convert categories object to array and sort by ORDER
    const categoriesArray = Object.entries(window.configData.categories).map(([key, value]) => ({
      id: key,
      ...value
    }));
    
    // Sort by ORDER if available, otherwise by title
    categoriesArray.sort(function(a, b) {
      const orderA = parseInt(a.order) || 999;
      const orderB = parseInt(b.order) || 999;
      return orderA - orderB;
    });
    
    var self = this; // Preserve 'this' context
    
    categoriesArray.forEach(function(category) {
      // Backup config (engine/schedule/retention) now lives in the Backups tab's
      // embedded center (Overview › Backups › Configuration), so it's hidden from
      // the Admin config sidebar to avoid a second surface for the same data.
      if (category.id === 'backup') return;

      const categoryItem = document.createElement('div');
      categoryItem.className = 'category';
      categoryItem.setAttribute('data-category', category.id);
      
      // Use correct icon from our new structure
      const iconName = category.icon || category.id;
      const iconPath = '/components/admin/config/icons/' + iconName + '.svg';
      
      categoryItem.innerHTML = '<img src="' + iconPath + '" alt="' + category.title + '" style="width: 20px; height: 20px; margin-right: 8px;"/> ' + category.title;
      
      categoryItem.addEventListener('click', function() {
        // Update URL without full page reload
        window.history.pushState({}, '', window.adminPath(category.id));
        
        // Update active state
        document.querySelectorAll('.category').forEach(function(item) {
          item.classList.remove('active');
        });
        this.classList.add('active');
        
        // Update global category and load dynamically
        window.configCategory = category.id;
        
        // Load config dynamically without page refresh
        if (window.configManager && typeof window.configManager.renderConfig === 'function') {
          window.configManager.renderConfig(category.id);
        }
      });
      
      self.categoriesList.appendChild(categoryItem);
    });

    // Tools group — admin pages that live in this area but aren't config
    // categories (rendered by their own controller, not the config form).
    const toolsLabel = document.createElement('div');
    toolsLabel.className = 'sidebar-group-label';
    toolsLabel.textContent = 'Tools';
    self.categoriesList.appendChild(toolsLabel);

    const sshItem = document.createElement('div');
    sshItem.className = 'category';
    sshItem.setAttribute('data-category', 'ssh-access');
    // Inline key icon (currentColor so it follows the theme — security.svg
    // hardcodes a fixed blue stroke and so visually goes missing on certain
    // themes; the other Tools/admin items all use inline SVGs).
    sshItem.innerHTML = '<svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="margin-right:8px;vertical-align:middle"><circle cx="7.5" cy="15.5" r="5.5"></circle><line x1="11" y1="12" x2="21" y2="2"></line><line x1="17" y1="6" x2="20" y2="9"></line><line x1="14" y1="9" x2="17" y2="12"></line></svg> SSH Access';
    sshItem.addEventListener('click', function () {
      window.history.pushState({}, '', window.adminPath('ssh-access'));
      document.querySelectorAll('.category').forEach(function (item) { item.classList.remove('active'); });
      this.classList.add('active');
      window.configCategory = 'ssh-access';
      if (window.configManager && typeof window.configManager.renderConfig === 'function') {
        window.configManager.renderConfig('ssh-access');
      }
    });
    self.categoriesList.appendChild(sshItem);

    // Peers moved out of Admin → Overview › Migrate › Peers (it pairs with the
    // cross-host Restore there). /admin/tools/peers + /peers redirect there.

    // Set initial active category
    this.setActiveCategory(window.configCategory || 'overview');
    
  }

  setActiveCategory(categoryId) {
    // Update active state
    document.querySelectorAll('.category').forEach(function(item) {
      item.classList.remove('active');
    });
    var activeItem = document.querySelector('[data-category="' + categoryId + '"]');
    if (activeItem) {
      activeItem.classList.add('active');
    }
  }
}

// Export to global scope
window.ConfigSidebar = ConfigSidebar;
