import React, { useEffect, useRef, useState } from "react";
import { FaChevronLeft, FaChevronRight } from "react-icons/fa";

/**
 * A responsive carousel component that displays a list of children in a sliding manner.
 * It supports various features such as auto-play, pause on hover, navigation buttons, and responsive design.
 *
 * @param {ReactNode[]} children - The list of children to be displayed in the carousel.
 * @param {number} limit - The maximum number of children to be displayed in a single slide.
 * @param {number} [mdLimit] - The maximum number of children to be displayed in a single slide on medium-sized screens.
 * @param {number} [smLimit] - The maximum number of children to be displayed in a single slide on small-sized screens.
 * @param {number} [lgLimit] - The maximum number of children to be displayed in a single slide on large-sized screens.
 * @param {string} [title] - The title of the carousel.
 * @param {string} [bgImg] - The background image of the carousel.
 * @param {number} [autoAdvanceInterval] - The interval at which the carousel auto-advances.
 * @param {boolean} [pauseOnHover] - Whether the carousel should pause on hover.
 * @param {boolean} [autoPlay] - Whether the carousel should auto-play.
 * @param {string} [arrowPosition] - The position of the navigation arrows.
 * @param {boolean} [showArrows] - Whether to show the navigation arrows.
 * @param {string} [border] - The border style of the carousel.
 * @param {boolean} [showNavigation] - Whether to show the navigation buttons.
 * @param {string} [gap] - The gap between the children.
 * @param {string} [bg] - The background color of the carousel.
 * @param {string} [px] - The padding x of the carousel.
 * @param {string} [py] - The padding y of the carousel.
 * @return {JSX.Element} The carousel component.
 */

const useInterval = (callback, delay) => {
  const savedCallback = useRef();

  useEffect(() => {
    savedCallback.current = callback;
  }, [callback]);

  useEffect(() => {
    const tick = () => {
      savedCallback.current();
    };

    if (delay !== null) {
      const id = setInterval(tick, delay);
      return () => clearInterval(id);
    }
  }, [delay]);
};

const ResponsiveCarousel = ({
  children,
  limit,
  mdLimit,
  smLimit,
  lgLimit,
  title,
  bgImg,
  autoAdvanceInterval,
  pauseOnHover,
  autoPlay,
  arrowPosition,
  showArrows,
  border,
  showNavigation,
  gap,
  bg,
  px,
  py,
}) => {
  const [currentSlide, setCurrentSlide] = useState(0);
  const slideCount = Math.ceil(children.length / limit);
  const [isPlaying, setIsPlaying] = useState(autoPlay);
  const [updatedLimit, setUpdatedLimit] = useState(limit);

  useEffect(() => {
    const updateLimit = () => {
      if (window.innerWidth >= 1280) {
        setUpdatedLimit(lgLimit || limit);
      } else if (window.innerWidth >= 768) {
        setUpdatedLimit(mdLimit || limit);
      } else {
        setUpdatedLimit(smLimit || limit);
      }
    };
    updateLimit();
    window.addEventListener("resize", updateLimit);
    return () => window.removeEventListener("resize", updateLimit);
  }, [limit, mdLimit, smLimit, lgLimit]);

  const chunkedChildren = Array.from({ length: slideCount }, (_, i) =>
    children.slice(i * updatedLimit, (i + 1) * updatedLimit)
  );

  // console.log("border: ", border != "none" ? border + "px" : border);
  const prevSlide = () => {
    setCurrentSlide((prevSlide) =>
      prevSlide === 0 ? slideCount - 1 : prevSlide - 1
    );
  };

  const nextSlide = () => {
    setCurrentSlide((prevSlide) =>
      prevSlide === slideCount - 1 ? 0 : prevSlide + 1
    );
  };

  useEffect(() => {
    if (autoPlay) {
      const id = setInterval(() => {
        if (isPlaying) {
          nextSlide();
        }
      }, autoAdvanceInterval);

      return () => clearInterval(id);
    }
  }, [autoPlay, autoAdvanceInterval, isPlaying]);

  const handleMouseEnter = () => {
    if (pauseOnHover) {
      setIsPlaying(false);
    }
  };
  const RenderButtons = () => {
    return (
      <div className="flex justify-center">
        <button
          onClick={prevSlide}
          className="bg-white/40 hover:bg-gray-100 text-gray-dark  font-bold py-2 px-2 "
        >
          <FaChevronLeft />
        </button>
        <button
          onClick={nextSlide}
          className="bg-white/40 hover:bg-gray-100 text-gray-dark  font-bold py-2 px-2 "
        >
          <FaChevronRight />
        </button>
      </div>
    );
  };

  const handleMouseLeave = () => {
    if (pauseOnHover) {
      setIsPlaying(autoPlay);
    }
  };

  return (
    <>
      {title && (
        <div className={"w-full text-base flex justify-between "}>
          <div id="title" className="bg-white text-sm uppercase">
            {title}
          </div>

          {showArrows && <RenderButtons position="topRight" />}
        </div>
      )}
      <div
        className={`bg-${bg} px-${px} py-${py} flex border border-${
          border != "none" ? border + "px" : border
        } border-gray-200 justify-evenly items-center overflow-hidden w-full relative mx-auto`}
        onMouseEnter={handleMouseEnter}
        onMouseLeave={handleMouseLeave}
      >
        <div className={`w-full flex justify-evenly gap-${gap}`}>
          {chunkedChildren.map((chunk, index) => (
            <div
              key={index}
              className={`flex w-full justify-evenly gap-${gap} transition-transform duration-500 ${
                index !== currentSlide ? "absolute" : ""
              } ${
                index === currentSlide
                  ? "translate-x-0"
                  : index < currentSlide
                  ? "-translate-x-full"
                  : "translate-x-full"
              }`}
            >
              {chunk}
            </div>
          ))}
        </div>
      </div>
    </>
  );
};
export default ResponsiveCarousel;