"use client";

import Image from "next/image";
import Link from "next/link";
import { ChevronLeft, ChevronRight } from "lucide-react";
import { useRef, useState } from "react";

// Galería deslizable de la tarjeta de producto: permite ver todas las
// imágenes desde el listado sin entrar al producto. En móvil se desliza
// con el dedo (scroll-snap nativo); en escritorio aparecen flechas al
// pasar el mouse. Cada imagen sigue siendo un link a la ficha.
export function ProductCardGallery({
  images,
  name,
  href,
  priority = false,
}: {
  images: string[];
  name: string;
  href: string;
  priority?: boolean;
}) {
  const scroller = useRef<HTMLDivElement>(null);
  const [index, setIndex] = useState(0);
  const total = images.length;

  const goTo = (target: number) => {
    const node = scroller.current;
    if (!node) return;
    const next = Math.max(0, Math.min(total - 1, target));
    node.scrollTo({ left: next * node.clientWidth, behavior: "smooth" });
  };

  const onScroll = () => {
    const node = scroller.current;
    if (!node || node.clientWidth === 0) return;
    setIndex(Math.round(node.scrollLeft / node.clientWidth));
  };

  return (
    <>
      <div
        ref={scroller}
        onScroll={total > 1 ? onScroll : undefined}
        className="flex h-full snap-x snap-mandatory overflow-x-auto [overscroll-behavior-x:contain] [scrollbar-width:none] [&::-webkit-scrollbar]:hidden"
      >
        {images.map((src, slide) => (
          <Link
            key={src}
            href={href}
            prefetch={false}
            className="relative block h-full w-full shrink-0 snap-center snap-always"
            aria-label={total > 1 ? `${name}, imagen ${slide + 1} de ${total}` : name}
            tabIndex={slide === 0 ? 0 : -1}
          >
            <Image
              src={src}
              alt={slide === 0 ? name : `${name} (imagen ${slide + 1})`}
              fill
              priority={priority && slide === 0}
              sizes="(max-width: 640px) 82vw, (max-width: 1024px) 44vw, 280px"
              className="object-cover transition duration-500 group-hover:scale-[1.035]"
            />
          </Link>
        ))}
      </div>

      {total > 1 && (
        <>
          <button
            type="button"
            aria-label="Imagen anterior"
            disabled={index === 0}
            onClick={() => goTo(index - 1)}
            className="absolute left-2 top-1/2 hidden size-9 -translate-y-1/2 place-items-center rounded-full bg-white/95 text-ari-marino opacity-0 shadow-lg transition group-hover:opacity-100 focus-visible:opacity-100 disabled:pointer-events-none disabled:!opacity-0 pointer-fine:grid"
          >
            <ChevronLeft className="size-5" />
          </button>
          <button
            type="button"
            aria-label="Imagen siguiente"
            disabled={index === total - 1}
            onClick={() => goTo(index + 1)}
            className="absolute right-2 top-1/2 hidden size-9 -translate-y-1/2 place-items-center rounded-full bg-white/95 text-ari-marino opacity-0 shadow-lg transition group-hover:opacity-100 focus-visible:opacity-100 disabled:pointer-events-none disabled:!opacity-0 pointer-fine:grid"
          >
            <ChevronRight className="size-5" />
          </button>
          <div className="absolute inset-x-0 bottom-2 flex justify-center">
            <div className="flex items-center rounded-full bg-white/85 px-1 shadow-sm backdrop-blur">
              {images.map((src, dot) => (
                <button
                  key={src}
                  type="button"
                  aria-label={`Ver imagen ${dot + 1} de ${total}`}
                  aria-current={dot === index}
                  onClick={() => goTo(dot)}
                  className="grid h-5 place-items-center px-[3px]"
                >
                  <span
                    className={`block h-1.5 rounded-full transition-all ${
                      dot === index ? "w-4 bg-ari-coral" : "w-1.5 bg-ari-marino/35"
                    }`}
                  />
                </button>
              ))}
            </div>
          </div>
        </>
      )}
    </>
  );
}