"use client";

import Image from "next/image";
import Link from "next/link";
import { useEffect, useState } from "react";
import { SlotImage } from "@/components/SlotImage";
import { heroSides, heroSlides } from "@/lib/data";
import type { StaticImageWithUrl } from "@/lib/static-images";
import { slotAlt, slotAspectStyle } from "@/lib/static-images";

const overlayStyle = {
  background:
    "linear-gradient(to left, rgba(0,0,0,0.88) 0%, rgba(0,0,0,0.72) 42%, rgba(0,0,0,0.28) 72%, transparent 100%)",
};

type Props = {
  images?: StaticImageWithUrl[];
  aspectRatio?: string;
  sideImages?: StaticImageWithUrl[];
  sideAspectRatio?: string;
};

export function HeroSlider({
  images = [],
  aspectRatio,
  sideImages = [],
  sideAspectRatio,
}: Props) {
  const slides = images;
  const [index, setIndex] = useState(0);
  const [paused, setPaused] = useState(false);
  const count = slides.length > 0 ? slides.length : heroSlides.length;

  useEffect(() => {
    setIndex((current) => (count ? current % count : 0));
  }, [count]);

  useEffect(() => {
    if (paused || count < 2) return;
    const id = window.setInterval(() => {
      setIndex((current) => (current + 1) % count);
    }, 5000);
    return () => window.clearInterval(id);
  }, [paused, count]);

  const sliderStyle = slotAspectStyle(aspectRatio, "21:8");

  return (
    <section className="container-site pt-5">
      <div
        className="relative overflow-hidden rounded-2xl min-h-[240px] md:min-h-[360px]"
        style={sliderStyle ?? { aspectRatio: "21 / 8" }}
        onMouseEnter={() => setPaused(true)}
        onMouseLeave={() => setPaused(false)}
      >
        {slides.length > 0
          ? slides.map((slide, i) => {
              const title = slide.titleFa?.trim();
              const english = slide.titleEn?.trim();
              const subtitle = slide.subtext?.trim();
              const hasCopy = Boolean(title || english || subtitle);
              return (
                <div
                  key={slide.id}
                  aria-hidden={i !== index}
                  className={`absolute inset-0 transition-opacity duration-700 ease-in-out ${
                    i === index ? "opacity-100 z-[1]" : "opacity-0 z-0 pointer-events-none"
                  }`}
                >
                  <SlotImage image={slide} fill alt={slotAlt(slide, `اسلاید ${i + 1}`)} />
                  {hasCopy ? (
                    <>
                      <div
                        className="pointer-events-none absolute inset-y-0 right-0 z-[2] w-[58%] md:w-[46%]"
                        style={overlayStyle}
                      />
                      <div className="pointer-events-none absolute z-[3] right-6 md:right-12 top-1/2 -translate-y-1/2 max-w-[230px] sm:max-w-sm text-white text-right">
                        {title ? (
                          <p className="text-2xl sm:text-3xl md:text-4xl font-extrabold leading-none">{title}</p>
                        ) : null}
                        {english ? (
                          <p
                            dir="ltr"
                            className="mt-0.5 font-carter text-[10px] sm:text-xs md:text-sm tracking-[0.42em] text-brand uppercase"
                          >
                            {english}
                          </p>
                        ) : null}
                        {subtitle ? (
                          <p className="mt-1 text-lg sm:text-xl md:text-2xl font-medium leading-tight text-white/90">
                            {subtitle}
                          </p>
                        ) : null}
                      </div>
                    </>
                  ) : null}
                </div>
              );
            })
          : heroSlides.map((slide, i) => (
              <div
                key={slide.title}
                aria-hidden={i !== index}
                className={`absolute inset-0 transition-opacity duration-700 ease-in-out ${
                  i === index ? "opacity-100 z-[1]" : "opacity-0 z-0 pointer-events-none"
                }`}
              >
                <Image
                  src={slide.image}
                  alt={slide.title}
                  fill
                  sizes="1200px"
                  priority={i === 0}
                  className="object-cover object-[28%_center]"
                />
              </div>
            ))}

        {slides.length === 0 ? (
          <>
            <div
              className="pointer-events-none absolute inset-y-0 right-0 z-[2] w-[58%] md:w-[46%]"
              style={overlayStyle}
            />
            {heroSlides.map((slide, i) => (
              <div
                key={`${slide.title}-copy`}
                className={`absolute z-[3] right-6 md:right-12 top-1/2 -translate-y-1/2 max-w-[230px] sm:max-w-sm text-white text-right transition-opacity duration-700 ${
                  i === index ? "opacity-100" : "opacity-0 pointer-events-none"
                }`}
              >
                <p className="text-2xl sm:text-3xl md:text-4xl font-extrabold leading-none">{slide.title}</p>
                <p
                  dir="ltr"
                  className="mt-0.5 font-carter text-[10px] sm:text-xs md:text-sm tracking-[0.42em] text-brand uppercase"
                >
                  {slide.english}
                </p>
                <p className="mt-1 text-lg sm:text-xl md:text-2xl font-medium leading-tight text-white/90">
                  {slide.subtitle}
                </p>
                <Link
                  href={slide.href}
                  className="mt-5 inline-flex items-center justify-center rounded-lg bg-brand px-5 py-2.5 text-sm sm:text-base font-bold text-white hover:bg-[#e01e1e]"
                >
                  {slide.button}
                </Link>
              </div>
            ))}
          </>
        ) : null}

        {count > 1 ? (
          <div className="absolute bottom-4 left-1/2 z-[4] -translate-x-1/2 flex gap-2">
            {Array.from({ length: count }, (_, i) => (
              <button
                key={slides[i]?.id ?? heroSlides[i]?.title ?? i}
                type="button"
                aria-label={`اسلاید ${i + 1}`}
                onClick={() => setIndex(i)}
                className={`h-2.5 rounded-full transition-all ${i === index ? "w-7 bg-brand" : "w-2.5 bg-white/80"}`}
              />
            ))}
          </div>
        ) : null}
      </div>

      <div className="mt-4 grid grid-cols-1 sm:grid-cols-2 gap-4">
        {sideImages.length > 0
          ? sideImages.map((image) => {
              const title = image.titleFa?.trim();
              const english = image.titleEn?.trim();
              const subtitle = image.subtext?.trim();
              const hasCopy = Boolean(title || english || subtitle);
              const frame = (
                <div
                  className="relative overflow-hidden rounded-2xl"
                  style={slotAspectStyle(sideAspectRatio, "13:5")}
                >
                  <SlotImage image={{ ...image, linkUrl: null }} fill alt={slotAlt(image, "بنر سالار استور")} />
                  {hasCopy ? (
                    <>
                      <div
                        className="pointer-events-none absolute inset-y-0 right-0 w-[62%] md:w-[52%]"
                        style={overlayStyle}
                      />
                      <div className="pointer-events-none absolute right-4 md:right-6 top-1/2 -translate-y-1/2 max-w-[180px] md:max-w-[220px] text-white text-right">
                        {title ? (
                          <p className="text-base md:text-xl font-extrabold leading-none">{title}</p>
                        ) : null}
                        {english ? (
                          <p
                            dir="ltr"
                            className="mt-0.5 font-carter text-[9px] md:text-[10px] tracking-[0.4em] text-brand uppercase"
                          >
                            {english}
                          </p>
                        ) : null}
                        {subtitle ? (
                          <p className="mt-0.5 text-sm md:text-base leading-tight text-white/90">{subtitle}</p>
                        ) : null}
                      </div>
                    </>
                  ) : null}
                </div>
              );
              return image.linkUrl ? (
                <a key={image.id} href={image.linkUrl} className="block">
                  {frame}
                </a>
              ) : (
                <div key={image.id}>{frame}</div>
              );
            })
          : heroSides.map((side) => (
              <Link key={side.title} href={side.href} className="relative block overflow-hidden rounded-2xl">
                <div className="relative aspect-[21/8] sm:aspect-[2.6/1]">
                  <Image
                    src={side.image}
                    alt={side.title}
                    fill
                    sizes="600px"
                    className="object-cover object-[28%_center]"
                  />
                </div>
                <div
                  className="pointer-events-none absolute inset-y-0 right-0 w-[62%] md:w-[52%]"
                  style={overlayStyle}
                />
                <div className="absolute right-4 md:right-6 top-1/2 -translate-y-1/2 max-w-[180px] md:max-w-[220px] text-white text-right">
                  <p className="text-base md:text-xl font-extrabold leading-none">{side.title}</p>
                  <p
                    dir="ltr"
                    className="mt-0.5 font-carter text-[9px] md:text-[10px] tracking-[0.4em] text-brand uppercase"
                  >
                    {side.english}
                  </p>
                  <p className="mt-0.5 text-sm md:text-base leading-tight text-white/90">{side.subtitle}</p>
                </div>
              </Link>
            ))}
      </div>
    </section>
  );
}