"use client";

import { useState } from "react";

function ChevronIcon({ direction, className }: { direction: "prev" | "next"; className?: string }) {
  const d = direction === "prev" ? "M14.5 6.5 9 12l5.5 5.5" : "M9.5 6.5 15 12l-5.5 5.5";
  return (
    <svg viewBox="0 0 24 24" fill="none" className={className} aria-hidden>
      <path d={d} stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" />
    </svg>
  );
}

export function ProductGallery({ images, alt }: { images: string[]; alt: string }) {
  const [index, setIndex] = useState(0);
  const [zoomed, setZoomed] = useState(false);
  const [origin, setOrigin] = useState({ x: 50, y: 50 });

  const list = images.length > 0 ? images : ["/images/placeholder.svg"];
  const hasMultiple = list.length > 1;

  const go = (delta: number) => {
    setIndex((prev) => (prev + delta + list.length) % list.length);
  };

  return (
    <div className="grid gap-3">
      <div
        className="relative aspect-square w-full overflow-hidden rounded-2xl border border-border bg-surface"
        onMouseMove={(event) => {
          const rect = event.currentTarget.getBoundingClientRect();
          setOrigin({
            x: ((event.clientX - rect.left) / rect.width) * 100,
            y: ((event.clientY - rect.top) / rect.height) * 100,
          });
        }}
        onMouseEnter={() => setZoomed(true)}
        onMouseLeave={() => setZoomed(false)}
      >
        {/* eslint-disable-next-line @next/next/no-img-element */}
        <img
          src={list[index]}
          alt={alt}
          className="h-full w-full object-contain transition-transform duration-200 ease-out"
          style={{
            transform: zoomed ? "scale(2)" : "scale(1)",
            transformOrigin: `${origin.x}% ${origin.y}%`,
            cursor: zoomed ? "zoom-out" : "zoom-in",
          }}
        />

        {hasMultiple && (
          <>
            <button
              type="button"
              onClick={() => go(-1)}
              aria-label="تصویر بعدی"
              className="absolute top-1/2 right-3 z-10 flex h-9 w-9 -translate-y-1/2 items-center justify-center rounded-full border border-border bg-surface/90 text-foreground shadow-sm transition-colors hover:border-red hover:text-red"
            >
              <ChevronIcon direction="prev" className="h-5 w-5" />
            </button>
            <button
              type="button"
              onClick={() => go(1)}
              aria-label="تصویر قبلی"
              className="absolute top-1/2 left-3 z-10 flex h-9 w-9 -translate-y-1/2 items-center justify-center rounded-full border border-border bg-surface/90 text-foreground shadow-sm transition-colors hover:border-red hover:text-red"
            >
              <ChevronIcon direction="next" className="h-5 w-5" />
            </button>
          </>
        )}
      </div>

      {hasMultiple && (
        <div className="flex flex-wrap gap-3">
          {list.map((img, i) => (
            <button
              key={img + i}
              type="button"
              onClick={() => setIndex(i)}
              aria-label={`تصویر ${i + 1}`}
              className={`h-16 w-16 shrink-0 overflow-hidden rounded-lg border-2 transition-colors ${
                i === index ? "border-red" : "border-border hover:border-red-muted"
              }`}
            >
              {/* eslint-disable-next-line @next/next/no-img-element */}
              <img src={img} alt="" className="h-full w-full object-cover" />
            </button>
          ))}
        </div>
      )}
    </div>
  );
}