"use client";

import React, { useState } from "react";
import { Product } from "@/data/products";
import { useCart } from "@/context/CartContext";
import {
  X,
  Plus,
  Minus,
  ShoppingBag,
  Star,
  CheckCircle2,
  ShieldCheck,
  Clock,
  Truck,
  Heart,
  AlertCircle,
} from "lucide-react";

interface ProductModalProps {
  product: Product | null;
  onClose: () => void;
}

export function ProductModal({ product, onClose }: ProductModalProps) {
  const { addToCart } = useCart();
  const [selectedImage, setSelectedImage] = useState(0);
  const [quantity, setQuantity] = useState(1);
  const [activeTab, setActiveTab] = useState<"descripcion" | "ingredientes" | "conservacion">("descripcion");
  const [added, setAdded] = useState(false);

  if (!product) return null;

  const handleAdd = () => {
    if (!product.inStock) return;
    addToCart(product, quantity);
    setAdded(true);
    setTimeout(() => {
      setAdded(false);
      onClose();
    }, 800);
  };

  return (
    <div className="fixed inset-0 z-50 overflow-y-auto bg-black/60 backdrop-blur-xs flex items-center justify-center p-4 sm:p-6 animate-in fade-in duration-200">
      {/* Click outside backdrop */}
      <div className="fixed inset-0" onClick={onClose} />

      <div className="relative bg-white rounded-3xl shadow-2xl max-w-4xl w-full overflow-hidden z-10 border border-stone-200 flex flex-col md:flex-row max-h-[90vh]">
        {/* Close Button */}
        <button
          onClick={onClose}
          className="absolute top-4 right-4 z-20 bg-stone-100/80 hover:bg-stone-200 text-stone-700 p-2 rounded-full transition"
          aria-label="Cerrar ventana"
        >
          <X className="w-5 h-5" />
        </button>

        {/* Left Column: Image Gallery */}
        <div className="md:w-1/2 p-6 bg-stone-50 flex flex-col justify-between border-b md:border-b-0 md:border-r border-stone-200">
          <div className="relative aspect-square w-full rounded-2xl overflow-hidden bg-white border border-stone-200 shadow-inner">
            {/* eslint-disable-next-line @next/next/no-img-element */}
            <img
              src={product.images[selectedImage] || product.thumbnail}
              alt={product.name}
              className="w-full h-full object-cover"
            />
            {product.isFreeShipping && (
              <span className="absolute top-3 left-3 bg-emerald-700 text-white text-xs font-bold px-3 py-1 rounded-full uppercase tracking-wider shadow-sm">
                Envío Gratis
              </span>
            )}
          </div>

          {/* Thumbnail Selector */}
          {product.images.length > 1 && (
            <div className="flex gap-2 mt-4 overflow-x-auto pb-1">
              {product.images.map((img, idx) => (
                <button
                  key={idx}
                  onClick={() => setSelectedImage(idx)}
                  className={`w-16 h-16 rounded-lg overflow-hidden border-2 transition shrink-0 ${
                    selectedImage === idx ? "border-amber-700 ring-2 ring-amber-200" : "border-stone-200 opacity-70 hover:opacity-100"
                  }`}
                >
                  {/* eslint-disable-next-line @next/next/no-img-element */}
                  <img src={img} alt="" className="w-full h-full object-cover" />
                </button>
              ))}
            </div>
          )}

          {/* Trust points */}
          <div className="mt-6 pt-4 border-t border-stone-200 text-xs text-stone-600 space-y-2">
            <div className="flex items-center gap-2">
              <Truck className="w-4 h-4 text-amber-800" />
              <span>Entrega rápida en 24-48h con packaging isotérmico</span>
            </div>
            <div className="flex items-center gap-2">
              <ShieldCheck className="w-4 h-4 text-emerald-700" />
              <span>Garantía de frescura artesana desde nuestro obrador</span>
            </div>
          </div>
        </div>

        {/* Right Column: Product Info & Purchase Controls */}
        <div className="md:w-1/2 p-6 sm:p-8 flex flex-col justify-between overflow-y-auto">
          <div className="space-y-4">
            {/* Category & Rating */}
            <div className="flex items-center justify-between">
              <span className="text-xs uppercase font-bold tracking-wider text-amber-900 bg-amber-100/60 px-2.5 py-1 rounded-md">
                {product.category}
              </span>
              <div className="flex items-center gap-1 text-amber-500">
                <Star className="w-4 h-4 fill-current" />
                <span className="text-xs font-bold text-stone-800">{product.rating.toFixed(1)}</span>
                <span className="text-xs text-stone-400">({product.reviewsCount} opiniones)</span>
              </div>
            </div>

            {/* Title & Weight */}
            <div>
              <h2 className="font-serif text-2xl sm:text-3xl font-bold text-stone-900 leading-snug">
                {product.name}
              </h2>
              <p className="text-sm font-medium text-stone-500 mt-1">
                Peso / Formato: <strong className="text-stone-800">{product.weight}</strong>
              </p>
            </div>

            {/* Price */}
            <div className="flex items-baseline gap-2">
              <span className="font-serif text-3xl font-bold text-amber-950">
                {product.price.toFixed(2)} €
              </span>
              <span className="text-xs text-stone-500">IVA incluido</span>
            </div>

            {/* Tabs for detailed content */}
            <div className="border-b border-stone-200">
              <div className="flex gap-4 text-xs font-bold">
                <button
                  onClick={() => setActiveTab("descripcion")}
                  className={`pb-2 border-b-2 transition ${
                    activeTab === "descripcion" ? "border-amber-800 text-amber-950" : "border-transparent text-stone-400 hover:text-stone-700"
                  }`}
                >
                  Descripción
                </button>
                <button
                  onClick={() => setActiveTab("ingredientes")}
                  className={`pb-2 border-b-2 transition ${
                    activeTab === "ingredientes" ? "border-amber-800 text-amber-950" : "border-transparent text-stone-400 hover:text-stone-700"
                  }`}
                >
                  Ingredientes & Alérgenos
                </button>
                <button
                  onClick={() => setActiveTab("conservacion")}
                  className={`pb-2 border-b-2 transition ${
                    activeTab === "conservacion" ? "border-amber-800 text-amber-950" : "border-transparent text-stone-400 hover:text-stone-700"
                  }`}
                >
                  Conservación
                </button>
              </div>
            </div>

            {/* Tab content */}
            <div className="text-xs text-stone-600 leading-relaxed min-h-[90px]">
              {activeTab === "descripcion" && (
                <p>{product.shortDescription || product.description}</p>
              )}
              {activeTab === "ingredientes" && (
                <div className="space-y-2">
                  <p><strong>Ingredientes:</strong> {product.ingredients}</p>
                  <div>
                    <strong>Alérgenos:</strong>
                    <div className="flex flex-wrap gap-1.5 mt-1">
                      {product.allergens.map((alg) => (
                        <span key={alg} className="bg-stone-100 text-stone-700 px-2 py-0.5 rounded text-[10px] font-medium border border-stone-200">
                          {alg}
                        </span>
                      ))}
                    </div>
                  </div>
                </div>
              )}
              {activeTab === "conservacion" && (
                <div className="flex items-start gap-2 bg-amber-50/70 p-3 rounded-lg border border-amber-200 text-amber-950">
                  <AlertCircle className="w-4 h-4 text-amber-700 shrink-0 mt-0.5" />
                  <p>{product.conservation}</p>
                </div>
              )}
            </div>
          </div>

          {/* Bottom Controls: Quantity & Add to Cart */}
          <div className="pt-6 border-t border-stone-200 space-y-3">
            {product.inStock ? (
              <div className="flex items-center gap-4">
                {/* Quantity */}
                <div className="flex items-center border border-stone-300 rounded-xl bg-stone-50">
                  <button
                    onClick={() => setQuantity(Math.max(1, quantity - 1))}
                    className="p-2.5 hover:bg-stone-200 text-stone-700 transition rounded-l-xl"
                  >
                    <Minus className="w-4 h-4" />
                  </button>
                  <span className="px-4 font-bold text-sm text-stone-900">
                    {quantity}
                  </span>
                  <button
                    onClick={() => setQuantity(quantity + 1)}
                    className="p-2.5 hover:bg-stone-200 text-stone-700 transition rounded-r-xl"
                  >
                    <Plus className="w-4 h-4" />
                  </button>
                </div>

                {/* Add to Cart Button */}
                <button
                  onClick={handleAdd}
                  className={`flex-1 py-3 px-6 rounded-xl font-bold text-sm flex items-center justify-center gap-2 shadow-lg transition duration-200 ${
                    added
                      ? "bg-emerald-700 text-white"
                      : "bg-amber-900 hover:bg-amber-950 text-amber-50 active:scale-98"
                  }`}
                >
                  {added ? (
                    <>
                      <CheckCircle2 className="w-5 h-5" />
                      <span>¡Añadido a la Cesta!</span>
                    </>
                  ) : (
                    <>
                      <ShoppingBag className="w-5 h-5" />
                      <span>Añadir a la Cesta · {(product.price * quantity).toFixed(2)} €</span>
                    </>
                  )}
                </button>
              </div>
            ) : (
              <div className="bg-stone-100 text-stone-500 py-3 rounded-xl text-center font-semibold text-sm">
                Producto temporalmente agotado
              </div>
            )}
          </div>
        </div>
      </div>
    </div>
  );
}