"use client";

import { useState, useEffect, useCallback, ReactNode } from "react";
import { motion, AnimatePresence } from "framer-motion";
import { ChevronLeft, ChevronRight } from "lucide-react";
import { cn } from "@/lib/utils";
import Image from "next/image";

// =============================================================================
// CAROUSEL
// Sliding content carousel
// =============================================================================

interface CarouselProps {
  children: ReactNode[];
  autoPlay?: boolean;
  autoPlayInterval?: number;
  showArrows?: boolean;
  showDots?: boolean;
  className?: string;
}

export function Carousel({
  children,
  autoPlay = false,
  autoPlayInterval = 5000,
  showArrows = true,
  showDots = true,
  className,
}: CarouselProps) {
  const [current, setCurrent] = useState(0);
  const [direction, setDirection] = useState(0);

  const slideCount = children.length;

  const next = useCallback(() => {
    setDirection(1);
    setCurrent((prev) => (prev + 1) % slideCount);
  }, [slideCount]);

  const prev = useCallback(() => {
    setDirection(-1);
    setCurrent((prev) => (prev - 1 + slideCount) % slideCount);
  }, [slideCount]);

  const goTo = (index: number) => {
    setDirection(index > current ? 1 : -1);
    setCurrent(index);
  };

  useEffect(() => {
    if (!autoPlay) return;
    const timer = setInterval(next, autoPlayInterval);
    return () => clearInterval(timer);
  }, [autoPlay, autoPlayInterval, next]);

  const variants = {
    enter: (direction: number) => ({
      x: direction > 0 ? 1000 : -1000,
      opacity: 0,
    }),
    center: {
      x: 0,
      opacity: 1,
    },
    exit: (direction: number) => ({
      x: direction < 0 ? 1000 : -1000,
      opacity: 0,
    }),
  };

  return (
    <div className={cn("relative overflow-hidden", className)}>
      <div className="relative aspect-video">
        <AnimatePresence initial={false} custom={direction}>
          <motion.div
            key={current}
            custom={direction}
            variants={variants}
            initial="enter"
            animate="center"
            exit="exit"
            transition={{
              x: { type: "spring", stiffness: 300, damping: 30 },
              opacity: { duration: 0.2 },
            }}
            className="absolute inset-0"
          >
            {children[current]}
          </motion.div>
        </AnimatePresence>
      </div>

      {/* Arrows */}
      {showArrows && slideCount > 1 && (
        <>
          <button
            onClick={prev}
            className="absolute left-4 top-1/2 -translate-y-1/2 w-10 h-10 rounded-full bg-background/80 backdrop-blur-sm flex items-center justify-center hover:bg-background transition-colors"
            aria-label="Previous slide"
          >
            <ChevronLeft className="w-6 h-6" />
          </button>
          <button
            onClick={next}
            className="absolute right-4 top-1/2 -translate-y-1/2 w-10 h-10 rounded-full bg-background/80 backdrop-blur-sm flex items-center justify-center hover:bg-background transition-colors"
            aria-label="Next slide"
          >
            <ChevronRight className="w-6 h-6" />
          </button>
        </>
      )}

      {/* Dots */}
      {showDots && slideCount > 1 && (
        <div className="absolute bottom-4 left-1/2 -translate-x-1/2 flex gap-2">
          {children.map((_, index) => (
            <button
              key={index}
              onClick={() => goTo(index)}
              className={cn(
                "w-2 h-2 rounded-full transition-colors",
                current === index
                  ? "bg-primary w-6"
                  : "bg-primary/40 hover:bg-primary/60"
              )}
              aria-label={`Go to slide ${index + 1}`}
            />
          ))}
        </div>
      )}
    </div>
  );
}

// =============================================================================
// IMAGE CAROUSEL
// Carousel with images
// =============================================================================

interface ImageCarouselProps {
  images: { src: string; alt: string; caption?: string }[];
  autoPlay?: boolean;
  autoPlayInterval?: number;
  showArrows?: boolean;
  showDots?: boolean;
  showCaptions?: boolean;
  className?: string;
}

export function ImageCarousel({
  images,
  autoPlay = true,
  autoPlayInterval = 5000,
  showArrows = true,
  showDots = true,
  showCaptions = true,
  className,
}: ImageCarouselProps) {
  return (
    <Carousel
      autoPlay={autoPlay}
      autoPlayInterval={autoPlayInterval}
      showArrows={showArrows}
      showDots={showDots}
      className={className}
    >
      {images.map((image, index) => (
        <div key={index} className="relative w-full h-full">
          <Image
            src={image.src}
            alt={image.alt}
            fill
            className="object-cover"
          />
          {showCaptions && image.caption && (
            <div className="absolute bottom-0 left-0 right-0 p-4 bg-gradient-to-t from-black/60 to-transparent">
              <p className="text-white text-center">{image.caption}</p>
            </div>
          )}
        </div>
      ))}
    </Carousel>
  );
}

// =============================================================================
// TESTIMONIAL CAROUSEL
// Carousel for testimonials
// =============================================================================

interface Testimonial {
  content: string;
  author: string;
  role?: string;
  avatar?: string;
  rating?: number;
}

interface TestimonialCarouselProps {
  testimonials: Testimonial[];
  autoPlay?: boolean;
  className?: string;
}

export function TestimonialCarousel({
  testimonials,
  autoPlay = true,
  className,
}: TestimonialCarouselProps) {
  const [current, setCurrent] = useState(0);

  useEffect(() => {
    if (!autoPlay) return;
    const timer = setInterval(() => {
      setCurrent((prev) => (prev + 1) % testimonials.length);
    }, 6000);
    return () => clearInterval(timer);
  }, [autoPlay, testimonials.length]);

  return (
    <div className={cn("relative", className)}>
      <div className="overflow-hidden">
        <AnimatePresence mode="wait">
          <motion.div
            key={current}
            initial={{ opacity: 0, y: 20 }}
            animate={{ opacity: 1, y: 0 }}
            exit={{ opacity: 0, y: -20 }}
            transition={{ duration: 0.3 }}
            className="text-center px-4"
          >
            {/* Rating */}
            {testimonials[current].rating && (
              <div className="flex justify-center gap-1 mb-4">
                {Array.from({ length: 5 }).map((_, i) => (
                  <span
                    key={i}
                    className={cn(
                      "text-xl",
                      i < testimonials[current].rating!
                        ? "text-yellow-500"
                        : "text-muted"
                    )}
                  >
                    ★
                  </span>
                ))}
              </div>
            )}

            {/* Quote */}
            <blockquote className="text-xl md:text-2xl italic max-w-3xl mx-auto">
              &ldquo;{testimonials[current].content}&rdquo;
            </blockquote>

            {/* Author */}
            <div className="mt-6 flex items-center justify-center gap-4">
              {testimonials[current].avatar && (
                <div className="relative w-12 h-12 rounded-full overflow-hidden">
                  <Image
                    src={testimonials[current].avatar}
                    alt={testimonials[current].author}
                    fill
                    className="object-cover"
                  />
                </div>
              )}
              <div className="text-left">
                <div className="font-semibold">
                  {testimonials[current].author}
                </div>
                {testimonials[current].role && (
                  <div className="text-sm text-muted-foreground">
                    {testimonials[current].role}
                  </div>
                )}
              </div>
            </div>
          </motion.div>
        </AnimatePresence>
      </div>

      {/* Dots */}
      {testimonials.length > 1 && (
        <div className="flex justify-center gap-2 mt-8">
          {testimonials.map((_, index) => (
            <button
              key={index}
              onClick={() => setCurrent(index)}
              className={cn(
                "w-2 h-2 rounded-full transition-all",
                current === index
                  ? "bg-primary w-6"
                  : "bg-muted-foreground/30 hover:bg-muted-foreground/50"
              )}
              aria-label={`Go to testimonial ${index + 1}`}
            />
          ))}
        </div>
      )}
    </div>
  );
}