/*
 * Card component for showing a product in the store grid.
 *
 * Author: Shiv
 * Date: April 2026
 */

"use client";

import Link from "next/link";
import { useState } from "react";
import { useRouter } from "next/navigation";
import { useAuth } from "@/context/AuthContext";
import { useCart } from "@/context/CartContext";

//Shared CSS class for the quantity plus and minus buttons
const qtyBtnCls = "w-7 h-7 border border-[#ddd] rounded-md bg-white text-base cursor-pointer flex items-center justify-center transition-colors hover:border-[#e68672] disabled:opacity-50";

//Card shown in the products grid, includes quantity selector and add to cart button
export default function ProductCard({ prodId, prodName, categoryName, prodPrice, imageUrl }) {
  const { user } = useAuth();
  const { addItem, selectedStoreId } = useCart();
  const router = useRouter();
  const [quantity, setQuantity] = useState(1);
  const [adding, setAdding] = useState(false);
  const [feedback, setFeedback] = useState(null);

  //Adds the selected quantity to the cart, redirects to login if not logged in
  async function handleAddToCart(e) {
    e.preventDefault();
    if (!user) { router.push("/login"); return; }
    if (!selectedStoreId) {
      setFeedback("Please select a store first");
      setTimeout(() => setFeedback(null), 2500);
      return;
    }
    setAdding(true);
    setFeedback(null);
    try {
      await addItem(prodId, quantity);
      setFeedback("Added!");
      setTimeout(() => setFeedback(null), 1500);
    } catch (err) {
      setFeedback(err.message || "Failed to add");
      setTimeout(() => setFeedback(null), 2500);
    } finally {
      setAdding(false);
    }
  }

  return (
    <div className="flex flex-col no-underline rounded-2xl overflow-hidden shadow-[0_4px_12px_rgba(0,0,0,0.08)] transition-all duration-300 hover:-translate-y-1.5 hover:shadow-[0_8px_24px_rgba(0,0,0,0.13)] bg-white">
      <Link href={`/products/${prodId}`} className="no-underline text-inherit flex-1">
        <div className="bg-[#fff8ee] flex items-center justify-center aspect-square">
          <img
            src={imageUrl || "/images/pet-placeholder.png"}
            alt={prodName}
            className="w-full h-full object-cover"
            onError={(e) => {
              e.currentTarget.onerror = null;
              e.currentTarget.src = "/images/pet-placeholder.png";
            }}
          />
        </div>
        <div className="px-3 pt-[0.6rem] pb-3 flex flex-col gap-[0.2rem]">
          <h3 className="text-[0.95rem] font-bold text-[#222] m-0 truncate">{prodName}</h3>
          <p className="text-[0.8rem] text-[#666] m-0">{categoryName}</p>
          {prodPrice != null && (
            <span className="inline-block mt-1 text-[1.05rem] font-bold text-[#1a7a3c]">${parseFloat(prodPrice).toFixed(2)}</span>
          )}
        </div>
      </Link>

      <div className="px-3 pb-3 flex flex-col gap-1.5">
        <div className="flex items-center gap-2">
          <button className={qtyBtnCls} type="button" onClick={() => setQuantity((q) => Math.max(1, q - 1))} disabled={adding}>−</button>
          <span className="min-w-6 text-center font-semibold text-[0.9rem]">{quantity}</span>
          <button className={qtyBtnCls} type="button" onClick={() => setQuantity((q) => q + 1)} disabled={adding}>+</button>
        </div>
        <button
          className="w-full py-[0.45rem] bg-[#e68672] text-white border-none rounded-lg text-[0.88rem] font-bold cursor-pointer transition-colors hover:bg-[#d4705e] disabled:opacity-60 disabled:cursor-not-allowed"
          type="button"
          onClick={handleAddToCart}
          disabled={adding}
        >
          {adding ? "Adding…" : "Add to Cart"}
        </button>
        {feedback && <p className="text-[0.78rem] text-[#2e7d32] m-0 text-center">{feedback}</p>}
      </div>
    </div>
  );
}