"use client";
import { FC, useState, useEffect, useCallback } from "react";
import { Movie } from "@/types/global";
import {
  FaPlus,
  FaFire,
  FaChevronLeft,
  FaChevronRight,
  FaMinus,
} from "react-icons/fa";
import { RiCalendarCheckLine, RiCalendarScheduleLine } from "react-icons/ri";
import { useGlobalStore } from "@/app/store/globalStore";
import Link from "next/link";
import { Button } from "@/components/atoms/Button";

type Props = {
  movies: Movie[];
  preheading?: string;
  autoRotate?: boolean;
  rotateInterval?: number;
};

export const Hero: FC<Props> = ({
  movies,
  preheading,
  autoRotate = true,
  rotateInterval = 10000,
}) => {
  const [currentIndex, setCurrentIndex] = useState(0);
  const [isTransitioning, setIsTransitioning] = useState(false);

  const {
    movies: storedMovies,
    addMovie: addMovieToStore,
    deleteMovie: deleteMovieInStore,
  } = useGlobalStore();

  const currentMovie = movies[currentIndex];

  if (!currentMovie) return null;

  const {
    id,
    title,
    overview,
    backdrop_path,
    poster_path,
    release_date,
    popularity,
    vote_average,
  } = currentMovie;

  const alreadyInStore = storedMovies.find((m) => m.id === id);
  const isReleased = new Date(release_date) < new Date();
  const releaseDate = new Date(release_date);

  const nextSlide = useCallback(() => {
    if (isTransitioning) return;
    setIsTransitioning(true);
    setTimeout(() => {
      setCurrentIndex((prev) => (prev + 1) % movies.length);
      setIsTransitioning(false);
    }, 500);
  }, [movies.length, isTransitioning]);

  const prevSlide = useCallback(() => {
    if (isTransitioning) return;
    setIsTransitioning(true);
    setTimeout(() => {
      setCurrentIndex((prev) => (prev - 1 + movies.length) % movies.length);
      setIsTransitioning(false);
    }, 500);
  }, [movies.length, isTransitioning]);

  const goToSlide = useCallback(
    (index: number) => {
      if (isTransitioning || index === currentIndex) return;
      setIsTransitioning(true);
      setTimeout(() => {
        setCurrentIndex(index);
        setIsTransitioning(false);
      }, 500);
    },
    [currentIndex, isTransitioning]
  );

  // Auto-rotate functionality.
  useEffect(() => {
    if (!autoRotate || movies.length <= 1) return;

    const interval = setInterval(nextSlide, rotateInterval);
    return () => clearInterval(interval);
  }, [autoRotate, rotateInterval, nextSlide, movies.length]);

  const handleAdd = async () => {
    addMovieToStore(currentMovie);
  };

  const handleRemove = async () => {
    deleteMovieInStore(id);
  };

  return (
    <section className="relative min-h-[70vh] flex items-center overflow-hidden pt-10 pb-20">
      {/* Background carousel */}
      <div className="absolute inset-0">
        {movies.map((movie, index) => (
          <div
            key={movie.id}
            className={`absolute inset-0 transition-opacity duration-500 ${
              index === currentIndex ? "opacity-100" : "opacity-0"
            }`}
          >
            <img
              src={`http://image.tmdb.org/t/p/w1280${backdrop_path}`}
              alt={movie.title}
              className="w-full h-full object-cover"
            />
          </div>
        ))}
        <div className="absolute inset-0 bg-gradient-to-r from-black/80 via-black/50 to-transparent" />
        <div className="absolute inset-0 bg-gradient-to-t from-black/60 via-transparent to-black/30" />
      </div>

      {/* Navigation arrows */}
      {movies.length > 1 && (
        <>
          <button
            onClick={prevSlide}
            disabled={isTransitioning}
            className="absolute left-4 top-1/2 -translate-y-1/2 z-20 p-3 bg-black/50 hover:bg-black/70 text-white rounded-full transition-all disabled:opacity-50 disabled:cursor-not-allowed"
          >
            <FaChevronLeft size={20} />
          </button>
          <button
            onClick={nextSlide}
            disabled={isTransitioning}
            className="absolute right-4 top-1/2 -translate-y-1/2 z-20 p-3 bg-black/50 hover:bg-black/70 text-white rounded-full transition-all disabled:opacity-50 disabled:cursor-not-allowed"
          >
            <FaChevronRight size={20} />
          </button>
        </>
      )}

      {/* Content with fade transitions */}
      <div className="container relative z-10">
        <div
          className={`flex flex-col lg:flex-row items-center gap-8 lg:gap-12 transition-opacity duration-500 ${
            isTransitioning ? "opacity-0" : "opacity-100"
          }`}
        >
          {/* Poster */}
          <div className="flex-shrink-0">
            <Link href={`/film/${id}`}>
              <img
                src={`http://image.tmdb.org/t/p/w500${poster_path}`}
                alt={title}
                className="w-64 h-96 object-cover rounded-lg shadow-2xl hover:scale-105 transition-transform duration-300"
              />
            </Link>
          </div>

          {/* Movie details */}
          <div className="flex-1 text-center lg:text-left">
            {preheading && (
              <h3 className="font-bold text-white leading-tight mb-2">
                {preheading}
              </h3>
            )}
            <h2 className="text-4xl lg:text-6xl font-bold text-white mb-4 leading-tight hover:text-secondary transition-colors duration-300">
              <Link href={`/film/${id}`}>{title}</Link>
            </h2>

            {/* Movie meta info */}
            <div className="flex flex-wrap items-center justify-center lg:justify-start gap-4 mb-6 text-white/80">
              <div className="flex items-center gap-2">
                <span
                  className={`flex items-center gap-1 text-sm ${
                    isReleased ? "text-green-400" : "text-yellow-400"
                  }`}
                >
                  {isReleased ? (
                    <RiCalendarCheckLine />
                  ) : (
                    <RiCalendarScheduleLine />
                  )}
                  {releaseDate.toLocaleDateString("pl-PL", {
                    day: "numeric",
                    month: "long",
                    year: "numeric",
                  })}
                </span>
              </div>

              <div className="flex items-center gap-1 text-sm">
                <FaFire className="text-orange-400" />
                <span>{popularity.toFixed(1)}</span>
              </div>

              <div className="flex items-center gap-1 text-sm">
                <span className="text-yellow-400">★</span>
                <span>{vote_average.toFixed(1)}/10</span>
              </div>
            </div>

            {/* Overview */}
            <p className="text-lg lg:text-xl text-white/90 mb-8 max-w-2xl leading-relaxed line-clamp-3 hover:text-secondary transition-all duration-300">
              <Link href={`/film/${id}`}>{overview}</Link>
            </p>

            {/* Action buttons */}
            <div className="flex flex-col sm:flex-row gap-4 justify-center lg:justify-start">
              <Button
                theme={alreadyInStore ? "primary" : "secondary"}
                onClick={alreadyInStore ? handleRemove : handleAdd}
              >
                {alreadyInStore ? <FaMinus /> : <FaPlus />}
                <span>
                  {alreadyInStore ? "Usuń z listy" : "Dodaj do listy"}
                </span>
              </Button>
            </div>
          </div>
        </div>
      </div>

      {/* Dot indicators */}
      {movies.length > 1 && (
        <div className="absolute bottom-8 left-1/2 -translate-x-1/2 z-20 flex gap-2">
          {movies.map((_, index) => (
            <button
              key={index}
              onClick={() => goToSlide(index)}
              disabled={isTransitioning}
              className={`w-3 h-3 rounded-full transition-all duration-300 disabled:cursor-not-allowed cursor-pointer ${
                index === currentIndex
                  ? "bg-secondary scale-125"
                  : "bg-white/50 hover:bg-secondary/70"
              }`}
            />
          ))}
        </div>
      )}
    </section>
  );
};