import { useEffect, useRef, useState } from 'react';
import { ChevronLeft, ChevronRight, Play, Star, Calendar, Clock } from 'lucide-react';

export default function MovieSlider({ movies = [] }) {
  const containerRef = useRef(null);
  const [canScrollLeft, setCanScrollLeft] = useState(false);
  const [canScrollRight, setCanScrollRight] = useState(true);

  const checkScroll = () => {
    const el = containerRef.current;
    if (!el) return;
    setCanScrollLeft(el.scrollLeft > 0);
    setCanScrollRight(el.scrollLeft + el.clientWidth < el.scrollWidth - 10);
  };

  useEffect(() => {
    checkScroll();
    const el = containerRef.current;
    if (el) {
      el.addEventListener('scroll', checkScroll);
      window.addEventListener('resize', checkScroll);
      return () => {
        el.removeEventListener('scroll', checkScroll);
        window.removeEventListener('resize', checkScroll);
      };
    }
  }, [movies]);

  const scroll = (dir) => {
    const el = containerRef.current;
    if (!el) return;
    el.scrollBy({ left: dir * el.clientWidth * 0.8, behavior: 'smooth' });
  };

  if (!movies?.length) return null;

  return (
    <div className="relative mx-auto max-w-7xl px-4 py-4">
      <div className="mb-3 flex items-center gap-2 text-lg font-bold text-white md:text-xl">
        <span className="h-5 w-1 rounded bg-[#e50914]" />
        Đề xuất hot
      </div>
      <div className="relative">
        <div
          ref={containerRef}
          className="flex snap-x snap-mandatory gap-4 overflow-x-auto pb-4 scrollbar-hide"
          style={{ scrollbarWidth: 'none', msOverflowStyle: 'none' }}
        >
          {movies.map((movie) => {
            const thumb = movie.thumb_url || movie.poster_url || '';
            const year = movie.year || (movie.modified?.time ? new Date(movie.modified.time).getFullYear() : '');
            return (
              <a
                key={movie._id || movie.slug}
                href={`/phim/${movie.slug}`}
                className="group relative w-[260px] flex-shrink-0 snap-start overflow-hidden rounded-xl sm:w-[300px] md:w-[340px]"
              >
                <div className="relative aspect-[16/10] overflow-hidden">
                  <img
                    src={thumb}
                    alt={movie.name}
                    loading="lazy"
                    className="h-full w-full object-cover transition-transform duration-500 group-hover:scale-105"
                    onError={(e) => { e.currentTarget.src = 'https://via.placeholder.com/640x360/1a1a1a/888?text=No+Image'; }}
                  />
                  <div className="absolute inset-0 bg-gradient-to-t from-black via-black/30 to-transparent" />
                  <div className="absolute inset-0 flex items-center justify-center opacity-0 transition-opacity duration-300 group-hover:opacity-100">
                    <div className="flex h-14 w-14 items-center justify-center rounded-full bg-[#e50914]/90 shadow-xl backdrop-blur-sm">
                      <Play size={24} className="ml-1 text-white" fill="white" />
                    </div>
                  </div>
                  <div className="absolute left-3 top-3">
                    {movie.quality && (
                      <span className="rounded bg-[#e50914] px-2 py-0.5 text-[10px] font-bold uppercase text-white">
                        {movie.quality}
                      </span>
                    )}
                  </div>
                </div>
                <div className="p-3">
                  <h3 className="line-clamp-1 text-sm font-bold text-white group-hover:text-[#e50914]">
                    {movie.name}
                  </h3>
                  <div className="mt-1 flex flex-wrap items-center gap-3 text-[11px] text-gray-400">
                    {year && <span className="flex items-center gap-1"><Calendar size={10} /> {year}</span>}
                    {movie.time && <span className="flex items-center gap-1"><Clock size={10} /> {movie.time}</span>}
                    {movie.tmdb?.vote_average && (
                      <span className="flex items-center gap-1 text-yellow-400">
                        <Star size={10} fill="currentColor" /> {movie.tmdb.vote_average.toFixed(1)}
                      </span>
                    )}
                  </div>
                </div>
              </a>
            );
          })}
        </div>

        {canScrollLeft && (
          <button
            onClick={() => scroll(-1)}
            className="absolute left-0 top-1/2 -translate-y-1/2 z-10 flex h-9 w-9 items-center justify-center rounded-full bg-black/60 text-white backdrop-blur-sm hover:bg-[#e50914] transition-colors"
          >
            <ChevronLeft size={20} />
          </button>
        )}
        {canScrollRight && (
          <button
            onClick={() => scroll(1)}
            className="absolute right-0 top-1/2 -translate-y-1/2 z-10 flex h-9 w-9 items-center justify-center rounded-full bg-black/60 text-white backdrop-blur-sm hover:bg-[#e50914] transition-colors"
          >
            <ChevronRight size={20} />
          </button>
        )}
      </div>
    </div>
  );
}