"use client";
import React, { useMemo, useState, useEffect } from "react";
import { Search, ShoppingBag, ChevronLeft, ArrowRight, Activity, Sparkles, HeartPulse, Stethoscope, ShieldCheck, Heart, AlertCircle } from "lucide-react";
import { usePetStore } from "../lib/store/usePetStore";
import { motion } from "motion/react";
import { Product } from "../lib/data/products";
import { productService } from "../lib/services/productService";

import { useRouter } from 'next/navigation';

export default function SearchResultsPage({ query }: { query: string }) {
  const router = useRouter();
  const { getActivePet } = usePetStore();
  const activePet = getActivePet();
  const [products, setProducts] = useState<Product[]>([]);

  useEffect(() => {
    productService.getProducts()
      .then(setProducts)
      .catch(err => console.error("Error fetching products in SearchResultsPage:", err));
  }, []);

  const results = products.filter(p => 
    p.name.toLowerCase().includes(query.toLowerCase()) ||
    p.description.toLowerCase().includes(query.toLowerCase()) ||
    p.main_ingredients.some(ing => ing.toLowerCase().includes(query.toLowerCase())) ||
    p.symptoms.some(sym => sym.toLowerCase().includes(query.toLowerCase()))
  );

  const bestSellers = products.slice(0, 3);

  return (
    <div className="min-h-screen bg-medical-gray-50 py-20 px-6 font-vazir" dir="rtl">
      <div className="max-w-7xl mx-auto">
        <button onClick={() => router.back()} className="flex items-center gap-2 text-medical-gray-400 font-black mb-10 hover:text-canina-blue transition-colors">
          <ArrowRight className="w-5 h-5 rotate-180" />
          بازگشت
        </button>

        <div className="flex flex-col md:flex-row md:items-end justify-between mb-16 gap-6">
          <div>
            <h1 className="text-4xl font-black text-medical-gray-900 italic mb-4">
              نتایج جستجو برای: <span className="text-canina-blue">"{query}"</span>
            </h1>
            <p className="text-medical-gray-500 font-medium">
              {results.length} محصول با معیارهای شما مطابقت دارد.
            </p>
          </div>
        </div>

        {results.length > 0 ? (
          <div className="grid md:grid-cols-2 lg:grid-cols-3 gap-8">
            {results.map((product) => {
              const compatibility = (() => {
                if (!activePet) return null;
                const sameSpecies = product.suitableFor === activePet.type || product.suitableFor === "هر دو";
                const helpsSymptom = activePet.medicalConditions.some(c => product.symptoms.includes(c));
                if (!sameSpecies) return { type: 'alert', text: `مخصوص ${product.suitableFor}` };
                if (helpsSymptom) return { type: 'success', text: `توصیه شده برای ${activePet.name}` };
                return { type: 'neutral', text: `مناسب برای ${activePet.name}` };
              })();

              return (
                <motion.div
                  key={product.id}
                  layoutId={product.id}
                  onClick={() => router.push(`/shop/${product.slug || product.id}`)}
                  className="bg-white rounded-[2.5rem] p-8 border border-medical-gray-200 group cursor-pointer hover:shadow-2xl hover:shadow-canina-blue/10 transition-all flex flex-col relative"
                >
                  <div className="relative aspect-square mb-8 bg-medical-gray-50 rounded-[2rem] overflow-hidden p-6 flex items-center justify-center">
                    <img 
                      src={product.image} 
                      alt={product.name} 
                      className="w-full h-full object-contain group-hover:scale-110 transition-transform duration-500" 
                      referrerPolicy="no-referrer"
                    />
                    {product.specialBadge && (
                      <div className="absolute top-4 right-4 bg-medical-gray-900 text-white text-[8px] font-black px-3 py-1 rounded-full uppercase tracking-widest">
                        {product.specialBadge}
                      </div>
                    )}
                    {compatibility && (
                      <div className={`absolute top-14 right-4 z-10 text-[8px] font-black uppercase tracking-widest px-3 py-1 rounded-full shadow-md 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' ? <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>
                    )}
                  </div>
                  
                  <div className="flex-1">
                    <span className="text-[10px] font-black text-canina-blue uppercase tracking-widest mb-2 block">{product.category}</span>
                    <h3 className="text-xl font-black text-medical-gray-900 mb-2 leading-tight group-hover:text-canina-blue transition-colors">{product.name}</h3>
                    <p className="text-xs text-medical-gray-400 line-clamp-2 leading-relaxed mb-6">{product.benefits}</p>
                  </div>

                  <div className="flex items-center justify-between pt-6 border-t border-medical-gray-100 italic">
                    <div>
                      <span className="text-lg font-black text-medical-gray-900">{product.price}</span>
                    </div>
                    <button className="bg-medical-gray-900 text-white w-10 h-10 rounded-xl flex items-center justify-center group-hover:bg-canina-blue transition-colors">
                      <ChevronLeft className="w-5 h-5" />
                    </button>
                  </div>
                </motion.div>
              )
            })}
          </div>
        ) : (
          <div className="space-y-16">
            <div className="bg-white border border-medical-gray-200 rounded-[3rem] p-12 text-center shadow-sm">
                <div className="w-20 h-20 bg-medical-gray-50 rounded-full flex items-center justify-center mx-auto text-medical-gray-300 mb-6">
                    <Search className="w-10 h-10" />
                </div>
                <h3 className="text-2xl font-black text-medical-gray-800 mb-4">نتیجه‌ای یافت نشد</h3>
                <p className="text-medical-gray-500 font-medium max-w-md mx-auto leading-relaxed">
                    متاسفیم، هیچ محصولی با عبارت مورد نظر شما مطابقت نداشت. شاید محصولات پرفروش ما برای شما مفید باشند؟
                </p>
            </div>

            <div>
                <h3 className="text-2xl font-black text-medical-gray-900 mb-10 italic">محصولات پیشنهادی (پرفروش)</h3>
                <div className="grid md:grid-cols-3 gap-8 opacity-60 hover:opacity-100 transition-opacity">
                    {bestSellers.map(p => (
                         <div key={p.id} onClick={() => router.push(`/shop/${p.id}`)} className="cursor-pointer group">
                             <div className="aspect-square bg-white rounded-[2rem] p-6 mb-4 border border-medical-gray-100 flex items-center justify-center">
                                 <img src={p.image} className="w-40 h-40 object-contain group-hover:scale-105 transition-transform" />
                             </div>
                             <h4 className="font-black text-medical-gray-900 text-center">{p.name}</h4>
                         </div>
                    ))}
                </div>
            </div>
          </div>
        )}
      </div>
    </div>
  );
}