"use client";

import { useEffect, useState } from "react";
import Image from "next/image";
import { ChevronLeft, ChevronRight, X } from "lucide-react";

export function Gallery({ images, alt }: { images: string[]; alt: string }) {
  const [active, setActive] = useState<number | null>(null);

  useEffect(() => {
    if (active === null) return;
    const onKey = (e: KeyboardEvent) => {
      if (e.key === "Escape") setActive(null);
      if (e.key === "ArrowRight")
        setActive((i) => (i === null ? null : (i + 1) % images.length));
      if (e.key === "ArrowLeft")
        setActive((i) =>
          i === null ? null : (i - 1 + images.length) % images.length,
        );
    };
    document.body.style.overflow = "hidden";
    window.addEventListener("keydown", onKey);
    return () => {
      document.body.style.overflow = "";
      window.removeEventListener("keydown", onKey);
    };
  }, [active, images.length]);

  return (
    <>
      <div className="grid gap-3 sm:grid-cols-2 lg:grid-cols-3">
        {images.map((src, i) => (
          <button
            key={src + i}
            type="button"
            onClick={() => setActive(i)}
            className="group relative aspect-video overflow-hidden rounded-xl border border-[var(--border)] bg-[var(--navy-50)]"
          >
            <Image
              src={src}
              alt={`${alt} — ${i + 1}`}
              fill
              sizes="(min-width: 1024px) 33vw, (min-width: 768px) 50vw, 100vw"
              className="object-cover transition group-hover:scale-105"
            />
          </button>
        ))}
      </div>

      {active !== null && (
        <div
          className="fixed inset-0 z-50 flex items-center justify-center bg-black/90 p-4"
          onClick={() => setActive(null)}
        >
          <button
            type="button"
            aria-label="Kapat"
            onClick={() => setActive(null)}
            className="absolute right-4 top-4 z-10 flex size-10 items-center justify-center rounded-full bg-white/10 text-white hover:bg-white/20"
          >
            <X className="size-5" />
          </button>

          {images.length > 1 && (
            <>
              <button
                type="button"
                aria-label="Önceki"
                onClick={(e) => {
                  e.stopPropagation();
                  setActive((i) =>
                    i === null ? null : (i - 1 + images.length) % images.length,
                  );
                }}
                className="absolute left-4 z-10 flex size-10 items-center justify-center rounded-full bg-white/10 text-white hover:bg-white/20"
              >
                <ChevronLeft className="size-5" />
              </button>
              <button
                type="button"
                aria-label="Sonraki"
                onClick={(e) => {
                  e.stopPropagation();
                  setActive((i) =>
                    i === null ? null : (i + 1) % images.length,
                  );
                }}
                className="absolute right-4 z-10 flex size-10 items-center justify-center rounded-full bg-white/10 text-white hover:bg-white/20"
              >
                <ChevronRight className="size-5" />
              </button>
            </>
          )}

          <div
            className="relative max-h-[90vh] max-w-6xl"
            onClick={(e) => e.stopPropagation()}
          >
            <Image
              src={images[active]}
              alt={`${alt} — ${active + 1}`}
              width={1600}
              height={1200}
              className="max-h-[90vh] w-auto rounded-lg object-contain"
            />
            <p className="mt-3 text-center text-xs text-white/60">
              {active + 1} / {images.length}
            </p>
          </div>
        </div>
      )}
    </>
  );
}