/** REACT */
import { useMemo, useRef, useState } from "react";
/** SWIPER PACKAGE */
import { Swiper as SwiperType } from "swiper";
import "swiper/css";
import "swiper/css/navigation";
import "swiper/css/pagination";
import { Pagination } from "swiper/modules";
import { Swiper, SwiperClass, SwiperSlide } from "swiper/react";
import { PaginationOptions } from "swiper/types";
/** THEME */
import EggArrowIcon from "$/uwil/Icons/EggArrowIcon";
import ItemCard from "$/uwil/ItemCard";
import { bgColors, imageShapes } from "@/front/lib/constants";
import { cn } from "@/lib/utils";
import {
  CarouselBreakpointsProps,
  CarouselPropsWithNavigation,
  SwiperButtonProps,
} from "@/types/front";

function NextButton({ swiperRef, disabled, icon }: SwiperButtonProps) {
  return (
    <button
      type="button"
      onClick={() => swiperRef.current?.slideNext()}
      disabled={disabled}
      className="hidden md:block disabled:opacity-0 z-10 hover:scale-105 transition-transform"
    >
      {icon ?? <EggArrowIcon direction="right" />}
    </button>
  );
}

function PrevButton({ swiperRef, disabled, icon }: SwiperButtonProps) {
  return (
    <button
      type="button"
      onClick={() => swiperRef.current?.slidePrev()}
      disabled={disabled}
      className="hidden md:block disabled:opacity-0 z-10 hover:scale-105 transition-transform"
    >
      {icon ?? <EggArrowIcon direction="left" />}
    </button>
  );
}

const defaultSlidesPerView: Record<number, number> = {
  768: 2,
  1024: 3,
  1248: 4,
};

export default function CarouselContent(props: CarouselPropsWithNavigation) {
  const {
    items,
    carousel,
    variant = bgColors.PRIMARY,
    prevBtn,
    nextBtn,
    shape = imageShapes.ROUNDED,
  } = props;
  const [isBeginning, setIsBeginning] = useState(true);
  const [isEnd, setIsEnd] = useState(false);

  const swiperRef = useRef<SwiperType | null>(null);

  const spaceBetween = carousel?.spaceBetween ?? 50;
  const slidesPerView = carousel?.slidesPerView ?? 1;
  const defaultPagination = useMemo((): PaginationOptions => {
    const bulletClass =
      variant === bgColors.PRIMARY
        ? "inline-block w-3 h-3 rounded-full bg-background/90 ring-1 ring-primary-foreground/20 mx-1"
        : "inline-block w-3 h-3 rounded-full bg-primary mx-1";

    return {
      clickable: true,
      bulletClass,
      bulletActiveClass: "!bg-primary-foreground w-6 h-6",
    };
  }, [variant]);

  const breakpoints = useMemo(() => {
    return Object.keys({
      ...defaultSlidesPerView,
      ...carousel?.breakpoints,
    }).reduce((acc, key) => {
      const numKey = Number(key);

      acc[numKey] = {
        ...carousel?.breakpoints?.[numKey],
        slidesPerView:
          carousel?.breakpoints?.[numKey]?.slidesPerView ??
          defaultSlidesPerView[numKey],
      };

      return acc;
    }, {} as CarouselBreakpointsProps);
  }, [carousel?.breakpoints]);

  const pagination = useMemo(() => {
    if (carousel?.pagination === false) return false;

    return {
      ...defaultPagination,
      ...(typeof carousel?.pagination === "object" ? carousel.pagination : {}),
    };
  }, [carousel?.pagination, defaultPagination]);

  const handleSwiper = (swiper: SwiperClass) => {
    swiperRef.current = swiper;
    carousel?.onSwiper?.(swiper);
  };

  return (
    <div className="relative flex justify-center items-center w-full ">
      <PrevButton icon={prevBtn} swiperRef={swiperRef} disabled={isBeginning} />
      <Swiper
        modules={[Pagination]}
        centeredSlides={carousel?.centeredSlides}
        spaceBetween={spaceBetween}
        slidesPerView={slidesPerView}
        onSlideChange={(swiper) => {
          carousel?.onSlideChange?.(swiper);
          setIsBeginning(swiper.isBeginning);
          setIsEnd(swiper.isEnd || swiper.isLocked);
        }}
        onAfterInit={(swiper) => {
          setIsBeginning(swiper.isBeginning);
          setIsEnd(swiper.isEnd || swiper.isLocked);
        }}
        watchOverflow={carousel?.watchOverflow}
        onSwiper={handleSwiper}
        autoplay={carousel?.autoplay}
        pagination={pagination}
        navigation={carousel?.navigation}
        breakpoints={breakpoints}
        wrapperClass={cn("pb-20", carousel?.wrapperClass)}
        className="w-full"
      >
        {items.map((item) => {
          const slideKey = `${item.image.src}-${item.title?.text ?? item.button?.href ?? "slide"}`;

          return (
            <SwiperSlide key={slideKey} className="justify-center !flex">
              <ItemCard
                image={{ lazyload: true, ...item.image }}
                shape={shape}
                title={item.title}
                subtitle={item.subtitle}
                description={item.description}
                button={item.button}
                variant={variant}
              />
            </SwiperSlide>
          );
        })}
      </Swiper>
      <NextButton icon={nextBtn} swiperRef={swiperRef} disabled={isEnd} />
    </div>
  );
}