/**
 * Shared Cart and Wishlist Utilities
 * Extracted from duplicated code across multiple pages
 */

const CartUtils = {
  /**
   * Get cart from localStorage
   * @returns {Array} Cart items
   */
  getCart() {
    try {
      return JSON.parse(localStorage.getItem("skyart_cart") || "[]");
    } catch (error) {
      console.error("Error loading cart:", error);
      return [];
    }
  },

  /**
   * Save cart to localStorage
   * @param {Array} cart - Cart items
   */
  saveCart(cart) {
    try {
      localStorage.setItem("skyart_cart", JSON.stringify(cart));
      this.updateCartBadge();
    } catch (error) {
      console.error("Error saving cart:", error);
    }
  },

  /**
   * Add item to cart
   * @param {Object} product - Product to add
   * @param {number} quantity - Quantity to add
   * @param {string} variant - Selected variant
   */
  addToCart(product, quantity = 1, variant = null) {
    const cart = this.getCart();
    const cartKey = variant ? `${product.id}-${variant}` : product.id;

    const existingIndex = cart.findIndex((item) => {
      const itemKey = item.variant
        ? `${item.productId}-${item.variant}`
        : item.productId;
      return itemKey === cartKey;
    });

    if (existingIndex >= 0) {
      cart[existingIndex].quantity += quantity;
    } else {
      cart.push({
        productId: product.id,
        name: product.name,
        price: product.price,
        image: product.images?.[0]?.image_url || product.imageurl,
        quantity,
        variant,
        slug: product.slug,
      });
    }

    this.saveCart(cart);
    return cart;
  },

  /**
   * Remove item from cart
   * @param {string} productId - Product ID to remove
   * @param {string} variant - Variant to remove
   */
  removeFromCart(productId, variant = null) {
    const cart = this.getCart();
    const cartKey = variant ? `${productId}-${variant}` : productId;

    const filtered = cart.filter((item) => {
      const itemKey = item.variant
        ? `${item.productId}-${item.variant}`
        : item.productId;
      return itemKey !== cartKey;
    });

    this.saveCart(filtered);
    return filtered;
  },

  /**
   * Update cart item quantity
   * @param {string} productId - Product ID
   * @param {number} quantity - New quantity
   * @param {string} variant - Variant
   */
  updateQuantity(productId, quantity, variant = null) {
    const cart = this.getCart();
    const cartKey = variant ? `${productId}-${variant}` : productId;

    const index = cart.findIndex((item) => {
      const itemKey = item.variant
        ? `${item.productId}-${item.variant}`
        : item.productId;
      return itemKey === cartKey;
    });

    if (index >= 0) {
      if (quantity <= 0) {
        cart.splice(index, 1);
      } else {
        cart[index].quantity = quantity;
      }
      this.saveCart(cart);
    }

    return cart;
  },

  /**
   * Get cart total
   * @returns {number} Total price
   */
  getCartTotal() {
    const cart = this.getCart();
    return cart.reduce((total, item) => {
      return total + parseFloat(item.price) * item.quantity;
    }, 0);
  },

  /**
   * Update cart badge count
   */
  updateCartBadge() {
    const cart = this.getCart();
    const count = cart.reduce((sum, item) => sum + item.quantity, 0);
    const badge = document.querySelector(".cart-badge");
    if (badge) {
      badge.textContent = count;
      badge.style.display = count > 0 ? "flex" : "none";
    }
  },

  /**
   * Clear cart
   */
  clearCart() {
    localStorage.removeItem("skyart_cart");
    this.updateCartBadge();
  },
};

const WishlistUtils = {
  /**
   * Get wishlist from localStorage
   * @returns {Array} Wishlist items
   */
  getWishlist() {
    try {
      return JSON.parse(localStorage.getItem("wishlist") || "[]");
    } catch (error) {
      console.error("Error loading wishlist:", error);
      return [];
    }
  },

  /**
   * Save wishlist to localStorage
   * @param {Array} wishlist - Wishlist items
   */
  saveWishlist(wishlist) {
    try {
      localStorage.setItem("wishlist", JSON.stringify(wishlist));
      this.updateWishlistBadge();
    } catch (error) {
      console.error("Error saving wishlist:", error);
    }
  },

  /**
   * Add item to wishlist
   * @param {Object} product - Product to add
   */
  addToWishlist(product) {
    const wishlist = this.getWishlist();

    if (!wishlist.find((item) => item.id === product.id)) {
      wishlist.push({
        id: product.id,
        name: product.name,
        price: product.price,
        image: product.images?.[0]?.image_url || product.imageurl,
        slug: product.slug,
      });
      this.saveWishlist(wishlist);
    }

    return wishlist;
  },

  /**
   * Remove item from wishlist
   * @param {string} productId - Product ID to remove
   */
  removeFromWishlist(productId) {
    const wishlist = this.getWishlist();
    const filtered = wishlist.filter((item) => item.id !== productId);
    this.saveWishlist(filtered);
    return filtered;
  },

  /**
   * Check if product is in wishlist
   * @param {string} productId - Product ID
   * @returns {boolean} True if in wishlist
   */
  isInWishlist(productId) {
    const wishlist = this.getWishlist();
    return wishlist.some((item) => item.id === productId);
  },

  /**
   * Update wishlist badge count
   */
  updateWishlistBadge() {
    const wishlist = this.getWishlist();
    const badge = document.querySelector(".wishlist-badge");
    if (badge) {
      badge.textContent = wishlist.length;
      badge.style.display = wishlist.length > 0 ? "flex" : "none";
    }
  },

  /**
   * Clear wishlist
   */
  clearWishlist() {
    localStorage.removeItem("wishlist");
    this.updateWishlistBadge();
  },
};

/**
 * Format price for display
 * @param {number} price - Price to format
 * @returns {string} Formatted price
 */
const formatPrice = (price) => {
  return `$${parseFloat(price).toFixed(2)}`;
};

/**
 * Format date for display
 * @param {string} dateString - ISO date string
 * @returns {string} Formatted date
 */
const formatDate = (dateString) => {
  const date = new Date(dateString);
  return date.toLocaleDateString("en-US", {
    year: "numeric",
    month: "long",
    day: "numeric",
  });
};

/**
 * Debounce function
 * @param {Function} func - Function to debounce
 * @param {number} wait - Wait time in ms
 * @returns {Function} Debounced function
 */
const debounce = (func, wait) => {
  let timeout;
  return function executedFunction(...args) {
    const later = () => {
      clearTimeout(timeout);
      func(...args);
    };
    clearTimeout(timeout);
    timeout = setTimeout(later, wait);
  };
};

/**
 * Show notification toast
 * @param {string} message - Message to display
 * @param {string} type - Type: success, error, info
 */
const showNotification = (message, type = "success") => {
  // Check if a notification container exists
  let container = document.querySelector(".notification-container");
  if (!container) {
    container = document.createElement("div");
    container.className = "notification-container";
    container.style.cssText = `
      position: fixed;
      top: 100px;
      right: 20px;
      z-index: 10000;
    `;
    document.body.appendChild(container);
  }

  const notification = document.createElement("div");
  notification.className = `notification notification-${type}`;
  notification.style.cssText = `
    background: ${
      type === "success" ? "#10b981" : type === "error" ? "#ef4444" : "#3b82f6"
    };
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    animation: slideIn 0.3s ease-out;
  `;
  notification.textContent = message;

  container.appendChild(notification);

  setTimeout(() => {
    notification.style.animation = "slideOut 0.3s ease-out";
    setTimeout(() => notification.remove(), 300);
  }, 3000);
};

// Export for use in other scripts
if (typeof window !== "undefined") {
  window.CartUtils = CartUtils;
  window.WishlistUtils = WishlistUtils;
  window.formatPrice = formatPrice;
  window.formatDate = formatDate;
  window.debounce = debounce;
  window.showNotification = showNotification;
}