"use client";
import { useState, useEffect, useMemo } from "react";
import { Product } from "../lib/data/products";
import { usePetStore } from "../lib/store/usePetStore";
import { productService } from "../lib/services/productService";
import { motion } from "motion/react";
import { Eye, ShoppingCart, Heart, AlertCircle, Sparkles, Dog, Cat } from "lucide-react";
import SafeImage from "./SafeImage";
import { ProductCardSkeleton } from "./Skeleton";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { useSettingsStore } from "../lib/store/settingsStore";
import { useCartStore } from "../lib/store/cartStore";
import { toast } from "sonner";

import { isSuitableForDog, isSuitableForCat, isSuitableForBoth, isSpeciesCompatible, matchesMedicalSymptom } from "../lib/petCompatibility";

function ProductCard({ product, priority = false }: { product: Product; priority?: boolean }) {
  const router = useRouter();
  const { getText, isInitialized } = useSettingsStore();
  const { getActivePet } = usePetStore();
  const activePet = getActivePet();
  const { addItem } = useCartStore();

  const nameFa = product.nameFa || product.name;
  const nameEn = product.nameEn || "";

  const forDog = isSuitableForDog(product.suitableFor);
  const forCat = isSuitableForCat(product.suitableFor);
  const forBoth = isSuitableForBoth(product.suitableFor) || (forDog && forCat);

  const compatibility = useMemo(() => {
    if (!activePet) return null;
    const petType = activePet.type || 'سگ';
    const sameSpecies = isSpeciesCompatible(product.suitableFor, petType);
    const matchedSymptom = matchesMedicalSymptom(activePet.medicalConditions, product.symptoms, product.benefits);
    
    if (!sameSpecies) return { type: "alert", text: `مخصوص ${product.suitableFor || 'پت'}` };
    if (matchedSymptom) return { type: "success", text: `توصیه شده برای ${matchedSymptom} ${activePet.name || 'پت شما'}` };
    return { type: "neutral", text: `مناسب برای ${activePet.name || 'پت شما'}` };
  }, [product, activePet]);

  const isCatalogOnly = isInitialized ? getText('CATALOG_ONLY_MODE', 'false') === 'true' : false;
  const showPreorderBtn = isCatalogOnly && (isInitialized ? getText('CATALOG_PREORDER_BTN', 'false') === 'true' : false);
  const allowCart = !isCatalogOnly && (isInitialized ? getText('allow_cart_purchase', 'true') === 'true' : true);
  const showPrices = !isCatalogOnly || (isInitialized ? getText('show_product_prices', 'true') === 'true' : true);

  return (
    <motion.div
      initial={{ opacity: 0, y: 15 }}
      whileInView={{ opacity: 1, y: 0 }}
      viewport={{ once: true }}
      transition={{ duration: 0.3, ease: "easeOut" }}
      onClick={() => router.push(`/shop/${product.slug || product.id}`)}
      className="group bg-white/90 backdrop-blur-md rounded-2xl sm:rounded-3xl border border-medical-gray-200/80 overflow-hidden hover:shadow-xl hover:shadow-canina-blue/10 hover:border-canina-blue/30 transition-all duration-300 flex flex-col cursor-pointer relative"
    >
      {/* Category Badge */}
      <div className="absolute top-3 right-3 sm:top-4 sm:right-4 z-30 px-2.5 py-1 bg-white/90 backdrop-blur-md rounded-full border border-medical-gray-200/80 text-2xs sm:text-xs font-black text-medical-gray-700 uppercase tracking-wider shadow-xs group-hover:bg-canina-blue group-hover:text-white transition-all">
        {product.category}
      </div>

      {/* Compatibility Tag */}
      {compatibility && (
        <div className={`absolute top-[2.8rem] sm:top-[3.25rem] right-3 sm:right-4 z-10 text-3xs font-black uppercase tracking-widest px-2.5 py-0.5 rounded-full shadow-xs flex items-center gap-1 ${
          compatibility.type === "alert" ? "bg-amber-100 text-amber-700" :
          compatibility.type === "success" ? "bg-green-100 text-green-700" : "bg-medical-gray-100 text-medical-gray-600"
        }`}>
          {compatibility.type === "alert" ? (
            forBoth ? (
              <span className="flex items-center gap-0.5">
                <Dog className="w-2.5 h-2.5" />
                <Cat className="w-2.5 h-2.5" />
              </span>
            ) : forCat ? (
              <Cat className="w-2.5 h-2.5" />
            ) : forDog ? (
              <Dog className="w-2.5 h-2.5" />
            ) : (
              <AlertCircle className="w-2.5 h-2.5" />
            )
          ) : compatibility.type === "success" ? (
            <Heart className="w-2.5 h-2.5" />
          ) : (
            <Sparkles className="w-2.5 h-2.5" />
          )}
          {compatibility.text}
        </div>
      )}

      {/* Image Container */}
      <div className="relative aspect-[16/11] sm:aspect-[4/3] bg-medical-gray-50 flex items-center justify-center overflow-hidden p-1 sm:p-2">
        <SafeImage
          src={product.image}
          alt={nameFa}
          priority={priority}
          sizes="(max-width: 640px) 180px, (max-width: 1024px) 240px, 280px)"
          className="w-full h-full group-hover:scale-105 transition-transform duration-500"
          imgClassName="object-contain w-full h-full max-h-[160px] sm:max-h-[200px] mx-auto"
        />

        {/* Species Badges (Dog / Cat) */}
        <div className="absolute bottom-2 left-2 flex gap-1 z-10">
          {forDog && (
            <div className="w-6 h-6 bg-white/90 backdrop-blur-xs rounded-md flex items-center justify-center text-medical-gray-500 border border-medical-gray-200 shadow-2xs" title="مناسب برای سگ">
              <Dog className="w-3.5 h-3.5 text-canina-blue" />
            </div>
          )}
          {forCat && (
            <div className="w-6 h-6 bg-white/90 backdrop-blur-xs rounded-md flex items-center justify-center text-medical-gray-500 border border-medical-gray-200 shadow-2xs" title="مناسب برای گربه">
              <Cat className="w-3.5 h-3.5 text-canina-blue" />
            </div>
          )}
        </div>
        {/* Hover Actions for desktop */}
        <div className="hidden sm:flex absolute inset-0 bg-canina-blue/60 opacity-0 group-hover:opacity-100 backdrop-blur-xs transition-all duration-300 items-center justify-center gap-3 z-20">
          <div
            onClick={(e) => { e.stopPropagation(); router.push(`/shop/${product.slug || product.id}`); }}
            className="w-10 h-10 rounded-full bg-white text-canina-blue flex items-center justify-center hover:scale-110 transition-transform shadow-lg cursor-pointer"
            title="مشاهده جزئیات"
          >
            <Eye className="w-5 h-5" />
          </div>
          {allowCart && (product.packageSize !== undefined && product.packageSize !== null ? Number(product.packageSize) : 100) > 0 && (
            <div
              onClick={(e) => {
                e.stopPropagation();
                addItem(product, 1);
                toast.success(`${nameFa} به سبد خرید اضافه شد.`);
              }}
              className="w-10 h-10 rounded-full bg-canina-blue text-white flex items-center justify-center hover:scale-110 transition-transform shadow-lg border border-white/20 cursor-pointer"
              title="افزودن به سبد خرید"
            >
              <ShoppingCart className="w-5 h-5" />
            </div>
          )}
        </div>
      </div>

      {/* Content */}
      <div className="px-3.5 py-3 sm:px-5 sm:py-4 flex flex-col flex-1 gap-2 sm:gap-3">
        {/* Dual-language Name */}
        <div className="flex flex-col gap-0.5">
          <h3 dir="rtl" className="text-xs sm:text-sm font-black text-medical-gray-900 group-hover:text-canina-blue transition-colors leading-snug text-right line-clamp-1 sm:line-clamp-2 font-vazir">
            {nameFa}
          </h3>
          {nameEn && (
            <span dir="ltr" className="text-2xs sm:text-xs-plus font-semibold text-slate-400 font-sans text-left block line-clamp-1">
              {nameEn}
            </span>
          )}
        </div>

        {/* Short description */}
        <p className="text-xs-plus sm:text-xs text-medical-gray-500 leading-relaxed line-clamp-1 sm:line-clamp-2 flex-1">
          {product.shortDescription || (product.description ? product.description.replace(/<[^>]*>/g, '') : '')}
        </p>

        {/* Footer: Price + CTA */}
        <div className="flex items-center justify-between pt-2 sm:pt-3 border-t border-medical-gray-100">
          <div className="text-xs sm:text-sm md:text-base font-black text-medical-gray-900 font-vazir whitespace-nowrap">
            {showPrices ? (typeof product.price === 'string' || typeof product.price === 'number' ? String(product.price) : 'تماس بگیرید') : 'تماس بگیرید'}
          </div>
          {showPreorderBtn ? (
            <span className="text-2xs sm:text-xs-plus font-black text-amber-600 bg-amber-50 px-2.5 py-1 rounded-full border border-amber-200">
              ثبت پیش‌خرید
            </span>
          ) : (
            <span className="text-2xs sm:text-xs-plus font-black text-canina-blue uppercase tracking-wider border-b border-canina-blue pb-0.5 group-hover:text-medical-gray-900 group-hover:border-medical-gray-900 transition-all whitespace-nowrap">
              {getText("product_view_details", "مشاهده جزئیات")}
            </span>
          )}
        </div>
      </div>
    </motion.div>
  );
}

export default function FeaturedProducts() {
  const router = useRouter();
  const getText = useSettingsStore((state) => state.getText);
  const [products, setProducts] = useState<Product[]>([]);
  const [isLoading, setIsLoading] = useState(true);

  useEffect(() => {
    productService.getFeaturedProducts()
      .then(setProducts)
      .catch(() => toast.error("خطا در دریافت لیست محصولات از سرور."))
      .finally(() => setIsLoading(false));
  }, []);

  return (
    <section className="py-8 sm:py-16 bg-medical-gray-50">
      <div className="max-w-7xl mx-auto px-4">
        <div className="flex items-center justify-between w-full mb-6 sm:mb-12 pb-4 sm:pb-6 border-b border-medical-gray-200 gap-2">
          <div>
            <div className="text-canina-blue text-[10px] sm:text-xs font-bold uppercase tracking-[0.2em] mb-1 sm:mb-2 font-vazir">
              {getText("featured_badge", "بیشترین انتخاب توسط دامپزشکان")}
            </div>
            <h2 className="text-xl sm:text-2xl md:text-3xl lg:text-4xl font-black text-medical-gray-900 font-lalezar tracking-wide">
              {getText("featured_title_line1", "محصولات برگزیده و راهکارهای")}{" "}
              <span className="text-canina-blue">{getText("featured_title_line2", "درمان تخصصی")}</span>
            </h2>
          </div>
          <button
            onClick={() => router.push("/shop")}
            className="inline-flex items-center gap-1 sm:gap-2 text-canina-blue font-black text-xs sm:text-sm hover:translate-x-1 transition-all group font-vazir shrink-0"
          >
            <span>{getText("featured_view_all", "مشاهده تمامی محصولات")}</span>
            <span className="text-sm sm:text-lg group-hover:-translate-x-1 transition-transform">←</span>
          </button>
        </div>

        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6">
          {isLoading ? (
            Array.from({ length: 4 }).map((_, i) => <ProductCardSkeleton key={i} />)
          ) : products.length > 0 ? (
            products.map((p, i) => <ProductCard key={p.id} product={p} priority={i < 2} />)
          ) : (
            <div className="col-span-full py-16 px-8 flex flex-col items-center justify-center text-center bg-white rounded-[2.5rem] border border-medical-gray-200 shadow-xl max-w-lg mx-auto">
              <AlertCircle className="w-12 h-12 text-canina-teal mb-4" />
              <h3 className="text-xl font-black text-medical-gray-900 mb-2 font-vazir">
                {getText("featured_no_products_title", "هیچ محصولی یافت نشد")}
              </h3>
              <p className="text-sm text-medical-gray-500 font-medium font-vazir leading-relaxed">
                {getText("featured_no_products_desc", "در حال حاضر هیچ محصول برجسته‌ای برای نمایش وجود ندارد.")}
              </p>
            </div>
          )}
        </div>
      </div>
    </section>
  );
}