(function () {
  'use strict';

  function onReady(fn) {
    if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', fn);
    else fn();
  }

  function setupSidebar() {
    const sidebarToggleBtn = document.getElementById('sidebarToggleBtn');
    const sidebar = document.getElementById('sidebar');
    const sidebarBackdrop = document.getElementById('sidebarBackdrop');
    if (!sidebarToggleBtn || !sidebar || !sidebarBackdrop) return;

    // Ensure clean state on page load
    sidebar.classList.remove('show');
    sidebarBackdrop.classList.remove('show');
    sidebarToggleBtn.setAttribute('aria-expanded', 'false');

    // Toggle sidebar visibility
    sidebarToggleBtn.addEventListener('click', function (event) {
      event.stopPropagation();
      event.preventDefault();

      // Toggle visibility
      sidebar.classList.toggle('show');
      sidebarBackdrop.classList.toggle('show');

      // Set aria-expanded for accessibility
      const isExpanded = sidebar.classList.contains('show');
      sidebarToggleBtn.setAttribute('aria-expanded', String(isExpanded));
    });

    // Close sidebar when clicking on backdrop
    sidebarBackdrop.addEventListener('click', function (event) {
      event.stopPropagation();
      sidebar.classList.remove('show');
      sidebarBackdrop.classList.remove('show');
      sidebarToggleBtn.setAttribute('aria-expanded', 'false');
    });

    // Close sidebar when clicking on any link inside it
    const sidebarLinks = sidebar.querySelectorAll('a.nav-link');
    sidebarLinks.forEach(link => {
      link.addEventListener('click', function () {
        // Let the link work, then close
        setTimeout(function () {
          sidebar.classList.remove('show');
          sidebarBackdrop.classList.remove('show');
          sidebarToggleBtn.setAttribute('aria-expanded', 'false');
        }, 100);
      });
    });

    // Ensure links are clickable
    sidebar.addEventListener('click', function (event) {
      event.stopPropagation();
    });
  }

  function initializeCartIntegration() {
    if (typeof window.updateCartCount !== 'function') {
      // define if missing
      window.updateCartCount = updateCartCount;
    }

    // initial
    updateCartCount();

    // Update cart count every 30 seconds
    setInterval(updateCartCount, 30000);

    // Listen for cart updates from other tabs/windows
    window.addEventListener('storage', function (e) {
      if (e.key === 'cart_items') {
        updateCartCount();
      }
    });

    // Listen for custom cart update events
    window.addEventListener('cartUpdated', function () {
      updateCartCount();
    });
  }

  async function updateCartCount() {
    try {
      const cartData = await window.apiJson('/api/cart', { cache: 'no-store' }) || {};
      const cartCount = parseInt(cartData.item_count) || 0;

      // Update sidebar cart counter
      const cartBadge = document.getElementById('cartItemCount');
      if (cartBadge) {
        if (cartCount > 0) {
          cartBadge.textContent = String(cartCount);
          cartBadge.style.display = 'flex';
        } else {
          cartBadge.style.display = 'none';
        }
      }

      // Update main navbar cart counter (from base.html)
      const navbarCartCount = document.querySelector('.cart-count');
      const navbarCartItem = document.getElementById('cartNavItem');
      if (navbarCartCount && navbarCartItem) {
        if (cartCount > 0) {
          navbarCartCount.textContent = String(cartCount);
          navbarCartCount.style.display = 'inline';
          navbarCartItem.style.display = 'block';
        } else {
          navbarCartCount.style.display = 'none';
          navbarCartItem.style.display = 'none';
        }
      }
    } catch (error) {
      // Hide counts on error
      const navbarCartCount = document.querySelector('.cart-count');
      const navbarCartItem = document.getElementById('cartNavItem');
      if (navbarCartCount && navbarCartItem) {
        navbarCartCount.style.display = 'none';
        navbarCartItem.style.display = 'none';
      }
      // Keep console error minimal
      // console.error('Error updating dashboard cart count:', error);
    }
  }

  // Expose minimal cart helpers used across dashboard (legacy localStorage-based)
  window.addToCart = function (serviceId, serviceName, price, specs) {
    try {
      const cartItems = JSON.parse(localStorage.getItem('cart_items') || '[]');
      const existingItem = cartItems.find(item => item.service_id === serviceId);
      if (existingItem) {
        window.showToast('Item already in cart', 'info');
        return false;
      }
      const newItem = {
        id: 'cart_' + Date.now() + '_' + Math.random().toString(36).substr(2, 9),
        service_id: serviceId,
        service_name: serviceName,
        price_tfc: price,
        specs: specs,
        added_at: new Date().toISOString()
      };
      cartItems.push(newItem);
      localStorage.setItem('cart_items', JSON.stringify(cartItems));
      updateCartCount();
      if (typeof window.emitCartUpdated === 'function') { window.emitCartUpdated(); }
      window.showToast('Added to cart successfully', 'success');
      return true;
    } catch (error) {
      window.showToast('Failed to add to cart', 'error');
      return false;
    }
  };

  window.removeFromCart = function (itemId) {
    try {
      const cartItems = JSON.parse(localStorage.getItem('cart_items') || '[]');
      const updatedItems = cartItems.filter(item => item.id !== itemId);
      localStorage.setItem('cart_items', JSON.stringify(updatedItems));
      updateCartCount();
      if (typeof window.emitCartUpdated === 'function') { window.emitCartUpdated(); }
      window.showToast('Removed from cart', 'success');
      return true;
    } catch (error) {
      window.showToast('Failed to remove from cart', 'error');
      return false;
    }
  };

  window.getCartItems = function () {
    try {
      return JSON.parse(localStorage.getItem('cart_items') || '[]');
    } catch (error) {
      return [];
    }
  };

  window.clearCart = function () {
    try {
      localStorage.removeItem('cart_items');
      updateCartCount();
      if (typeof window.emitCartUpdated === 'function') { window.emitCartUpdated(); }
      window.showToast('Cart cleared', 'success');
      return true;
    } catch (error) {
      window.showToast('Failed to clear cart', 'error');
      return false;
    }
  };

  // Toast helper
  window.showToast = function (message, type = 'info') {
    let toastContainer = document.getElementById('toastContainer');
    if (!toastContainer) {
      toastContainer = document.createElement('div');
      toastContainer.id = 'toastContainer';
      toastContainer.style.cssText = 'position: fixed; top: 20px; right: 20px; z-index: 9999; max-width: 300px;';
      document.body.appendChild(toastContainer);
    }
    const toast = document.createElement('div');
    const bgColor = type === 'success' ? '#28a745' : type === 'error' ? '#dc3545' : '#007bff';
    toast.style.cssText = 'background-color: ' + bgColor + '; color: white; padding: 12px 16px; border-radius: 6px; margin-bottom: 10px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); opacity: 0; transform: translateX(100%); transition: all 0.3s ease;';
    toast.textContent = message;
    toastContainer.appendChild(toast);
    setTimeout(function () {
      toast.style.opacity = '1';
      toast.style.transform = 'translateX(0)';
    }, 100);
    setTimeout(function () {
      toast.style.opacity = '0';
      toast.style.transform = 'translateX(100%)';
      setTimeout(function () {
        if (toast.parentNode) toast.parentNode.removeChild(toast);
      }, 300);
    }, 3000);
  };

  onReady(function () {
    setupSidebar();
    initializeCartIntegration();
  });
})();