import { GetStaticPaths, GetStaticProps } from "next"
import Head from "next/head"
import Image from "next/image"
import Link from "next/link"
import { useState } from "react"
import { Heart } from "lucide-react"
import Header from "../../components/Header"
import Footer from "../../components/Footer"
import { collections, getCollectionBySlug } from "../../data/collections"
import { Product, formatPrice, getProductsByCollection } from "../../data/products"
import { useRouter } from "next/router"
import { motion } from "framer-motion"

interface CollectionPageProps {
  collection: {
    id: number
    name: string
    image: string
    description: string
    url: string
    slug: string
  }
  collectionProducts: Product[]
}

export default function CollectionPage({ collection, collectionProducts }: CollectionPageProps) {
  const router = useRouter()
  const [hoveredProduct, setHoveredProduct] = useState<number | null>(null)
  const [favorites, setFavorites] = useState<number[]>([])

  // Если страница еще загружается, показываем заглушку
  if (router.isFallback) {
    return (
      <div className="min-h-screen flex items-center justify-center">
        <div className="animate-spin rounded-full h-32 w-32 border-t-2 border-b-2 border-gray-900"></div>
      </div>
    )
  }

  // Функция для добавления/удаления товара из избранного
  const toggleFavorite = (id: number, e: React.MouseEvent) => {
    e.stopPropagation()
    e.preventDefault()
    setFavorites((prev) => (prev.includes(id) ? prev.filter((itemId) => itemId !== id) : [...prev, id]))
  }

  return (
    <div className="min-h-screen bg-white font-['Arimo']">
      <Head>
        <title>{collection.name} | Brand Store</title>
        <link rel="icon" href="/favicon.ico" />
      </Head>

      <Header />

      <main>
        {/* Баннер коллекции */}
        <div className="relative h-[50vh] md:h-[60vh]">
          <Image
            src={collection.image}
            alt={collection.name}
            fill
            className="object-cover"
            priority
            quality={95}
          />
          <div className="absolute inset-0 bg-black bg-opacity-40 flex items-center justify-center">
            <div className="text-center text-white px-4">
              <motion.h1
                initial={{ opacity: 0, y: -20 }}
                animate={{ opacity: 1, y: 0 }}
                transition={{ duration: 0.5 }}
                className="text-3xl md:text-5xl font-bold mb-4 font-['Playfair_Display']"
              >
                {collection.name}
              </motion.h1>
              <motion.p
                initial={{ opacity: 0, y: 20 }}
                animate={{ opacity: 1, y: 0 }}
                transition={{ duration: 0.5, delay: 0.2 }}
                className="max-w-2xl mx-auto text-lg"
              >
                {collection.description}
              </motion.p>
            </div>
          </div>
        </div>

        {/* Список товаров */}
        <section className="py-12 px-4 md:px-8 max-w-7xl mx-auto">
          <div className="mb-8">
            <Link href="/collections" className="text-gray-600 hover:text-black transition-colors">
              ← Все коллекции
            </Link>
            <h2 className="text-2xl md:text-3xl font-bold mt-4 font-['Playfair_Display']">
              Товары из коллекции
            </h2>
          </div>

          {collectionProducts.length > 0 ? (
            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-8">
              {collectionProducts.map((product) => (
                <motion.div
                  key={product.id}
                  initial={{ opacity: 0, y: 20 }}
                  animate={{ opacity: 1, y: 0 }}
                  transition={{ duration: 0.5, delay: product.id * 0.05 }}
                  whileHover={{ y: -5, transition: { duration: 0.2 } }}
                >
                  <Link 
                    href={`/product/${product.slug}`}
                    className="block h-full"
                    onMouseEnter={() => setHoveredProduct(product.id)}
                    onMouseLeave={() => setHoveredProduct(null)}
                  >
                    <div className="relative overflow-hidden rounded-xl">
                      <div className="aspect-[3/4] relative overflow-hidden rounded-xl">
                        <Image
                          src={
                            hoveredProduct === product.id && product.images.length > 1 
                              ? product.images[1] 
                              : product.images[0]
                          }
                          alt={product.name}
                          fill
                          sizes="(max-width: 640px) 100vw, (max-width: 768px) 50vw, (max-width: 1024px) 33vw, 25vw"
                          className="object-cover transition-all duration-500 group-hover:scale-105"
                        />
                        {product.isNew && (
                          <span className="absolute top-4 left-4 bg-black text-white text-sm py-1 px-3 rounded">
                            Новинка
                          </span>
                        )}
                        <button
                          onClick={(e) => toggleFavorite(product.id, e)}
                          className="absolute top-4 right-4 bg-white/80 hover:bg-white rounded-full p-2 transition-all"
                          aria-label={favorites.includes(product.id) ? "Удалить из избранного" : "Добавить в избранное"}
                        >
                          <Heart
                            className={`w-5 h-5 ${favorites.includes(product.id) ? "fill-red-500 text-red-500" : "text-gray-700"}`}
                          />
                        </button>
                      </div>
                    </div>
                    <div className="mt-4">
                      <h3 className="text-lg font-medium">{product.name}</h3>
                      <p className="mt-1 text-lg font-bold">{formatPrice(product.price)} ₽</p>
                    </div>
                  </Link>
                </motion.div>
              ))}
            </div>
          ) : (
            <div className="text-center py-12">
              <p className="text-xl text-gray-600">В этой коллекции пока нет товаров</p>
              <Link href="/" className="mt-4 inline-block bg-black text-white px-6 py-2 rounded-md hover:bg-gray-800 transition-colors">
                Вернуться на главную
              </Link>
            </div>
          )}
        </section>
      </main>

      <Footer />
    </div>
  )
}

export const getStaticPaths: GetStaticPaths = async () => {
  const paths = collections.map((collection) => ({
    params: { slug: collection.slug },
  }))

  return {
    paths,
    fallback: 'blocking',
  }
}

export const getStaticProps: GetStaticProps = async ({ params }) => {
  const slug = params?.slug as string
  const collection = getCollectionBySlug(slug)

  if (!collection) {
    return {
      notFound: true,
    }
  }

  // Получаем товары, принадлежащие к данной коллекции
  const collectionProducts = getProductsByCollection(collection.id)

  return {
    props: {
      collection,
      collectionProducts,
    },
    revalidate: 600, // Перегенерация страницы каждые 10 минут
  }
} 