"use client";

import Link from "next/link";
import { motion, AnimatePresence } from "framer-motion";
import { X, ChevronLeft, ChevronRight } from "lucide-react";
import { useEffect, useState } from "react";
import { useRouter, useSearchParams } from "next/navigation";
import type { PublicArticle } from "@/lib/articles-public";
import { formatDate } from "@/utils/global";
import ArticleThumbnail from "@/components/landing-page/article-thumbnail";

function firstTag(tags: string | undefined): string {
  if (!tags?.trim()) return "";
  const t = tags
    .split(",")
    .map((s) => s.trim())
    .filter(Boolean)[0];
  return t ?? "";
}

function articleHref(a: PublicArticle) {
  return `/news/detail/${a.id}-${a.slug}`;
}

type Props = {
  featured: PublicArticle[];
  defaultSearch?: string;
};

export default function NewsAndServicesHeader({
  featured,
  defaultSearch = "",
}: Props) {
  const [activeHeader, setActiveHeader] = useState(0);
  const [activeModal, setActiveModal] = useState(0);
  const [open, setOpen] = useState(false);
  const [mounted, setMounted] = useState(false);

  const searchParams = useSearchParams();
  const router = useRouter();

  const slides = featured.length > 0 ? featured : [];
  const slideCount = slides.length;

  useEffect(() => {
    setMounted(true);
  }, []);

  useEffect(() => {
    if (!mounted) return;

    const highlight = searchParams.get("highlight");
    if (highlight === "1" && slideCount > 0) {
      setActiveModal(activeHeader);
      setOpen(true);
    }
  }, [mounted, searchParams, activeHeader, slideCount]);

  const closeModal = () => {
    setOpen(false);
    router.replace("/news-services");
  };

  const headerPrev = () => {
    if (slideCount === 0) return;
    setActiveHeader((p) => (p === 0 ? slideCount - 1 : p - 1));
  };

  const headerNext = () => {
    if (slideCount === 0) return;
    setActiveHeader((p) => (p === slideCount - 1 ? 0 : p + 1));
  };

  const modalPrev = () => {
    if (slideCount === 0) return;
    setActiveModal((p) => (p === 0 ? slideCount - 1 : p - 1));
  };

  const modalNext = () => {
    if (slideCount === 0) return;
    setActiveModal((p) => (p === slideCount - 1 ? 0 : p + 1));
  };

  if (!mounted) return null;

  const current = slides[activeHeader];
  const modalArticle = slides[activeModal];

  return (
    <>
      <section className="relative w-full bg-[#f8f8f8] pt-32 pb-24 md:pt-40 md:pb-32">
        <div className="container relative mx-auto px-6">
          {slideCount > 0 ? (
            <>
              <button
                type="button"
                onClick={headerPrev}
                className="absolute top-1/2 -left-6 z-10 hidden h-12 w-12 -translate-y-1/2 items-center justify-center rounded-full bg-white shadow-md lg:flex"
              >
                <ChevronLeft />
              </button>

              <button
                type="button"
                onClick={headerNext}
                className="absolute top-1/2 -right-6 z-10 hidden h-12 w-12 -translate-y-1/2 items-center justify-center rounded-full bg-white shadow-md lg:flex"
              >
                <ChevronRight />
              </button>
            </>
          ) : null}

          {slideCount === 0 ? (
            <div className="mx-auto max-w-2xl text-center">
              <h1 className="mb-4 text-3xl font-bold lg:text-4xl">
                Berita & Layanan
              </h1>
              <p className="text-muted-foreground">
                Konten unggulan akan tampil di sini setelah artikel dipublikasikan
                dari CMS.
              </p>
            </div>
          ) : (
            current && (
              <div className="flex flex-col items-center gap-14 lg:flex-row">
                <div className="relative w-full lg:w-1/2">
                  <div className="relative h-[420px] overflow-hidden rounded-3xl">
                    <ArticleThumbnail
                      src={current.thumbnailUrl}
                      alt={current.title}
                      sizes="(max-width: 1024px) 100vw, 50vw"
                    />
                  </div>

                  <div className="mt-4 flex justify-center gap-2">
                    {slides.map((_, i) => (
                      <span
                        key={i}
                        className={`h-2.5 rounded-full transition-all ${
                          activeHeader === i
                            ? "w-8 bg-[#b07c18]"
                            : "w-2.5 bg-gray-300"
                        }`}
                      />
                    ))}
                  </div>
                </div>

                <div className="w-full lg:w-1/2">
                  <h1 className="mb-6 text-4xl font-bold leading-tight lg:text-5xl">
                    {current.title}
                  </h1>

                  <div className="mb-5 flex flex-wrap items-center gap-3 text-sm text-gray-500">
                    <span>
                      {formatDate(current.publishedAt || current.createdAt)}
                    </span>
                    <span>•</span>
                    <span>{current.categoryName?.trim() || "Berita"}</span>
                    {firstTag(current.tags) ? (
                      <>
                        <span>•</span>
                        <span className="rounded bg-[#f2c94c] px-2 py-0.5 text-xs font-semibold text-black">
                          {firstTag(current.tags)}
                        </span>
                      </>
                    ) : null}
                  </div>

                  <p className="mb-8 leading-relaxed text-gray-700 line-clamp-5">
                    {current.description}
                  </p>

                  <div className="flex flex-wrap gap-3">
                    <Link
                      href={articleHref(current)}
                      className="inline-flex items-center justify-center rounded-xl bg-[#b07c18] px-7 py-3 font-medium text-white transition hover:opacity-90"
                    >
                      Baca Selengkapnya
                    </Link>
                    <button
                      type="button"
                      onClick={() => setOpen(true)}
                      className="inline-flex items-center justify-center rounded-xl border border-[#b07c18] px-7 py-3 font-medium text-[#b07c18] transition hover:bg-[#b07c18]/10"
                    >
                      Pratinjau
                    </button>
                  </div>
                </div>
              </div>
            )
          )}

          <div className="mt-20">
            <form
              action="/news-services"
              method="get"
              className="mx-auto flex max-w-3xl items-center overflow-hidden rounded-2xl border bg-white shadow-md"
            >
              <div className="px-4 text-gray-400">🔍</div>
              <input
                type="search"
                name="q"
                defaultValue={defaultSearch}
                placeholder="Cari berita, artikel, atau topik..."
                className="flex-1 px-4 py-4 outline-none"
              />
              <button
                type="submit"
                className="bg-[#b07c18] px-8 py-4 font-medium text-white"
              >
                Cari
              </button>
            </form>
          </div>
        </div>
      </section>

      <AnimatePresence>
        {open && slideCount > 0 && modalArticle && (
          <motion.div
            className="fixed inset-0 z-[110] flex items-center justify-center bg-black/60 backdrop-blur-sm"
            initial={{ opacity: 0 }}
            animate={{ opacity: 1 }}
            exit={{ opacity: 0 }}
          >
            <motion.div
              className="relative w-[90%] max-w-5xl overflow-hidden rounded-3xl bg-[#9c8414]"
              initial={{ scale: 0.95, opacity: 0 }}
              animate={{ scale: 1, opacity: 1 }}
              exit={{ scale: 0.95, opacity: 0 }}
            >
              <button
                type="button"
                onClick={closeModal}
                className="absolute top-4 right-4 z-10 flex h-10 w-10 items-center justify-center rounded-full bg-black/40 text-white"
              >
                <X />
              </button>

              <div className="relative h-[520px]">
                <ArticleThumbnail
                  src={modalArticle.thumbnailUrl}
                  alt={modalArticle.title}
                  sizes="100vw"
                />

                <div className="absolute bottom-6 left-6 right-6 text-white">
                  <h2 className="text-xl font-semibold md:text-2xl">
                    {modalArticle.title}
                  </h2>
                  <Link
                    href={articleHref(modalArticle)}
                    className="mt-3 inline-block text-sm font-medium underline"
                    onClick={closeModal}
                  >
                    Buka halaman artikel
                  </Link>
                </div>

                <button
                  type="button"
                  onClick={modalPrev}
                  className="absolute top-1/2 left-4 flex h-10 w-10 -translate-y-1/2 items-center justify-center rounded-full bg-black/40 text-white"
                >
                  <ChevronLeft />
                </button>

                <button
                  type="button"
                  onClick={modalNext}
                  className="absolute top-1/2 right-4 flex h-10 w-10 -translate-y-1/2 items-center justify-center rounded-full bg-black/40 text-white"
                >
                  <ChevronRight />
                </button>
              </div>

              <div className="flex justify-center gap-2 py-4">
                {slides.map((_, i) => (
                  <button
                    key={i}
                    type="button"
                    onClick={() => setActiveModal(i)}
                    className={`h-2.5 w-2.5 rounded-full ${
                      activeModal === i ? "bg-white" : "bg-white/40"
                    }`}
                  />
                ))}
              </div>
            </motion.div>
          </motion.div>
        )}
      </AnimatePresence>
    </>
  );
}