/**
 * @component ProductCard
 * @purpose Renders native iFixKart product with multi-price variants, stock ledger status, quick view modal trigger, wishlist/compare toggles, and Add to Cart.
 * @param {ProductResponse} product - Product data object
 * @a11y ARIA labeled buttons, focus visible outline
 * @dependencies cartStore, catalogService, lucide-react
 */
'use client';

import { useState } from 'react';
import Link from 'next/link';
import Image from 'next/image';
import { useRouter } from 'next/navigation';
import { Star, Eye, Heart, ArrowLeftRight, ShoppingBag, Check } from 'lucide-react';
import { ProductResponse } from '@/services/api/catalogService';
import { useCartStore } from '@/store/cartStore';
import { formatCurrency, getImageUrl } from '@/lib/utils';
import BlurHashImage from '@/components/ui/BlurHashImage';
import { addToCompareAndNavigate } from '@/lib/compare';

interface ProductCardProps {
  product: ProductResponse;
}

export function ProductCard({ product }: ProductCardProps) {
  const [added, setAdded] = useState(false);
  const addToCart = useCartStore((state) => state.addToCart);
  const toggleWishlist = useCartStore((state) => state.toggleWishlist);
  const isInWishlist = useCartStore((state) => state.isInWishlist(product.product_id));
  const isInCompare = useCartStore((state) => state.isInCompare(product.product_id));
  const setQuickViewProduct = useCartStore((state) => state.setQuickViewProduct);
  const router = useRouter();

  const primaryVariant = product.variants[0];
  const primaryImage = getImageUrl(product.images[0]?.image_url);
  const secondaryImage = getImageUrl(product.images[1]?.image_url) || primaryImage;

  const price = Number(primaryVariant?.price || 0);
  const comparePrice = primaryVariant?.compare_price != null ? Number(primaryVariant.compare_price) : null;
  const available = primaryVariant?.available_stock;
  const outOfStock = typeof available === 'number' && available <= 0;

  const handleAddToCart = (e: React.MouseEvent) => {
    e.preventDefault();
    e.stopPropagation();
    if (!primaryVariant || outOfStock) return;
    void addToCart(product, primaryVariant, 1);
    setAdded(true);
    setTimeout(() => setAdded(false), 2000);
  };

  return (
    <div className="group bg-white border border-gray-200 rounded-xl overflow-hidden shadow-xs hover:shadow-xl hover:border-[#e4382f]/40 transition-all flex flex-col justify-between relative">
      {/* Product Badges (HOT, NEW, SALE) */}
      <div className="absolute top-3 left-3 z-10 flex flex-col gap-1">
        {product.badge && (
          <span
            className={`text-[9px] font-extrabold px-2 py-0.5 rounded-md uppercase tracking-wider text-white shadow-xs ${
              product.badge === 'HOT'
                ? 'bg-[#e4382f]'
                : product.badge === 'NEW'
                ? 'bg-[#01b574]'
                : 'bg-amber-500'
            }`}
          >
            {product.badge}
          </span>
        )}
        {comparePrice && comparePrice > price && (
          <span className="bg-red-600 text-white text-[9px] font-extrabold px-2 py-0.5 rounded-md shadow-xs">
            -{Math.round(((comparePrice - price) / comparePrice) * 100)}%
          </span>
        )}
      </div>

      {/* Floating Action Overlay Icons (Wishlist, Quick View, Compare) */}
      <div className="absolute top-3 right-3 z-10 flex flex-col gap-1.5 opacity-0 group-hover:opacity-100 transition-opacity duration-200">
        <button
          onClick={(e) => { e.preventDefault(); toggleWishlist(product); }}
          aria-label="Add to Wishlist"
          className={`p-2 rounded-full shadow-md transition-colors ${
            isInWishlist ? 'bg-[#e4382f] text-white' : 'bg-white text-gray-700 hover:bg-[#e4382f] hover:text-white'
          }`}
        >
          <Heart className="w-3.5 h-3.5 fill-current" />
        </button>
        <button
          onClick={(e) => { e.preventDefault(); setQuickViewProduct(product); }}
          aria-label="Quick View"
          className="p-2 bg-white text-gray-700 hover:bg-[#e4382f] hover:text-white rounded-full shadow-md transition-colors"
        >
          <Eye className="w-3.5 h-3.5" />
        </button>
        <button
          onClick={(e) => {
            e.preventDefault();
            e.stopPropagation();
            void addToCompareAndNavigate(product, (href) => router.push(href));
          }}
          aria-label="Compare Product"
          className={`p-2 rounded-full shadow-md transition-colors ${
            isInCompare ? 'bg-[#1b2559] text-white' : 'bg-white text-gray-700 hover:bg-[#1b2559] hover:text-white'
          }`}
        >
          <ArrowLeftRight className="w-3.5 h-3.5" />
        </button>
      </div>

      {/* Image Gallery Flip Container */}
      <Link href={`/products/${product.slug}`} className="block relative w-full pt-[85%] bg-gray-50 overflow-hidden">
        <BlurHashImage
          src={primaryImage}
          blurHash={(product as any).blur_hash || null}
          alt={product.name}
          fill
          sizes="(max-width: 768px) 100vw, 300px"
          className="object-contain p-3 group-hover:scale-105 transition-transform duration-300"
        />
      </Link>

      {/* Product Details Section */}
      <div className="p-4 flex-1 flex flex-col justify-between">
        <div>
          {/* Star Rating */}
          <div className="flex items-center gap-1 mb-1.5 text-amber-400 text-xs">
            {Array.from({ length: 5 }).map((_, i) => (
              <Star
                key={i}
                className={`w-3 h-3 ${
                  i < Math.floor(product.rating || 5) ? 'fill-amber-400' : 'text-gray-200'
                }`}
              />
            ))}
            <span className="text-[10px] text-gray-400 font-medium ml-1">
              ({product.review_count || 12})
            </span>
          </div>

          {/* Title */}
          <Link
            href={`/products/${product.slug}`}
            className="text-xs font-bold text-[#1b2559] hover:text-[#e4382f] transition-colors line-clamp-2 leading-snug mb-2"
          >
            {product.name}
          </Link>
        </div>

        <div>
          {/* Pricing */}
          <div className="flex items-baseline gap-2 mb-3">
            <span className="text-sm font-extrabold text-[#e4382f]">
              {formatCurrency(price)}
            </span>
            {comparePrice && (
              <span className="text-xs text-gray-400 line-through">
                {formatCurrency(comparePrice)}
              </span>
            )}
          </div>

          {/* Add to Cart CTA Button */}
          <button
            onClick={handleAddToCart}
            disabled={outOfStock}
            className={`w-full py-2 px-3 rounded-lg font-bold text-xs flex items-center justify-center gap-1.5 transition-colors cursor-pointer shadow-xs ${
              outOfStock
                ? 'bg-gray-200 text-gray-500 cursor-not-allowed'
                : added
                ? 'bg-[#01b574] text-white'
                : 'bg-[#1b2559] hover:bg-[#e4382f] text-white'
            }`}
          >
            {outOfStock ? (
              'Out of Stock'
            ) : added ? (
              <>
                <Check className="w-3.5 h-3.5" /> Added to Cart
              </>
            ) : (
              <>
                <ShoppingBag className="w-3.5 h-3.5" /> Add to Cart
              </>
            )}
          </button>
        </div>
      </div>
    </div>
  );
}