"use client";
import { useEffect, useState } from "react";
import Image from "next/image";
import { getListArticle } from "@/service/article";
import Link from "next/link";
import { getAdvertise } from "@/service/advertisement";

// Type dari API
type Article = {
  id: number;
  title: string;
  description: string;
  categoryName: string;
  createdAt: string;
  slug: string;
  createdByName: string;
  thumbnailUrl: string;
  categories: { title: string }[];
  files: { fileUrl: string; file_alt: string }[];
};

type Advertise = {
  id: number;
  title: string;
  description: string;
  placement: string;
  contentFileUrl: string;
  redirectLink: string;
};

export default function News() {
  const [articlesByCategory, setArticlesByCategory] = useState<
    Record<string, Article[]>
  >({});
  const [loading, setLoading] = useState(true);
  const [visiblePosts, setVisiblePosts] = useState<Record<string, number>>({});
  const [bannerAd, setBannerAd] = useState<Advertise | null>(null);

  useEffect(() => {
    initStateAdver();
  }, []);

  async function initStateAdver() {
    const req = {
      limit: 100,
      page: 1,
      sort: "desc",
      sortBy: "created_at",
      isPublish: true,
    };

    try {
      const res = await getAdvertise(req);
      const data: Advertise[] = res?.data?.data || [];

      // filter iklan dengan placement = "banner"
      const banner = data.find((ad) => ad.placement === "banner");

      if (banner) {
        setBannerAd(banner);
      }
    } catch (err) {
      console.error("Error fetching advertisement:", err);
    }
  }
  useEffect(() => {
    fetchArticles();
  }, []);

  async function fetchArticles() {
    try {
      const req = {
        limit: "20", // ambil lebih banyak, nanti dibagi per kategori
        page: 1,
        search: "",
        categorySlug: "",
        sort: "desc",
        isPublish: true,
        sortBy: "created_at",
      };

      const res = await getListArticle(req);
      const allArticles: Article[] = res?.data?.data || [];

      // Group by category
      const grouped: Record<string, Article[]> = {};
      allArticles.forEach((a) => {
        const cat = a.categoryName || a.categories?.[0]?.title || "Lainnya";
        if (!grouped[cat]) grouped[cat] = [];
        grouped[cat].push(a);
      });

      setArticlesByCategory(grouped);

      // Set default visiblePosts untuk setiap kategori
      const initialVisible: Record<string, number> = {};
      Object.keys(grouped).forEach((cat) => {
        initialVisible[cat] = 2; // awal 2 post bawah
      });
      setVisiblePosts(initialVisible);
    } catch (error) {
      console.error("Gagal ambil artikel:", error);
    } finally {
      setLoading(false);
    }
  }

  return (
    <>
      <div className="max-w-7xl mx-auto  relative  mb-2 h-[120px] overflow-hidden flex items-center border my-8">
        {bannerAd ? (
          <a
            href={bannerAd.redirectLink}
            target="_blank"
            rel="noopener noreferrer"
            className="block w-full"
          >
            <div className="relative w-full h-[350px] flex justify-center">
              <Image
                src={bannerAd.contentFileUrl}
                alt={bannerAd.title || "Iklan Banner"}
                width={1200} // ukuran dasar untuk responsive
                height={350}
                className="object-cover w-full h-full"
              />
            </div>
          </a>
        ) : (
          <Image
            src="/image-kolom.png"
            alt="Berita Utama"
            width={1200}
            height={188}
            className="object-contain w-full h-[188px]"
          />
        )}
      </div>
      <div className="max-w-7xl mx-auto grid grid-cols-1 md:grid-cols-2 gap-6 mb-10">
        {loading && <p className="text-center">Memuat data...</p>}

        {!loading &&
          Object.keys(articlesByCategory).map((category) => {
            const posts = articlesByCategory[category];
            if (!posts?.length) return null;

            const postsTop = posts.slice(0, 2); // 2 atas
            const postsBottom = posts.slice(2); // sisanya

            return (
              <div key={category} className="border p-4 bg-white">
                {/* Header kategori */}
                <div className="bg-[#3677A8] text-white px-3 py-1 text-sm font-bold inline-block mb-4">
                  {category}
                </div>

                {/* Posts atas */}
                {postsTop.map((post) => (
                  <PostItem key={post.id} post={post} />
                ))}

                {/* Banner Kolom PPS */}
                <div className="relative mb-2 h-[120px] overflow-hidden flex items-center border my-8">
                  {bannerAd ? (
                    <a
                      href={bannerAd.redirectLink}
                      target="_blank"
                      rel="noopener noreferrer"
                      className="block w-full"
                    >
                      <div className="relative w-full h-[350px] flex justify-center">
                        <Image
                          src={bannerAd.contentFileUrl}
                          alt={bannerAd.title || "Iklan Banner"}
                          width={1200} // ukuran dasar untuk responsive
                          height={350}
                          className="object-cover w-full h-full"
                        />
                      </div>
                    </a>
                  ) : (
                    <Image
                      src="/image-kolom.png"
                      alt="Berita Utama"
                      width={1200}
                      height={188}
                      className="object-contain w-full h-[188px]"
                    />
                  )}
                </div>

                {/* Posts bawah (pakai visiblePosts[category]) */}
                {postsBottom
                  .slice(0, visiblePosts[category] || 2)
                  .map((post) => (
                    <PostItem key={post.id} post={post} />
                  ))}

                {/* Tombol Load More */}
                {(visiblePosts[category] || 2) < postsBottom.length && (
                  <div className="flex justify-center">
                    <button
                      onClick={() =>
                        setVisiblePosts((prev) => ({
                          ...prev,
                          [category]: (prev[category] || 2) + 2,
                        }))
                      }
                      className="bg-black text-white text-xs px-4 py-2 hover:bg-gray-800 mt-4"
                    >
                      LOAD MORE POSTS
                    </button>
                  </div>
                )}
              </div>
            );
          })}
      </div>
    </>
  );
}

function PostItem({ post }: { post: Article }) {
  return (
    <div className="flex gap-4 mb-6 pb-4">
      <Link
        className="flex items-center gap-4 "
        href={`/details/${post?.slug}`}
      >
        <div className="relative w-40 h-28 flex-shrink-0">
          <Image
            src={
              post.thumbnailUrl ||
              post.files?.[0]?.fileUrl ||
              "/placeholder.jpg"
            }
            alt={post.files?.[0]?.file_alt || post.title}
            fill
            className="object-cover"
          />
        </div>

        {/* Konten */}
        <div className="flex flex-col justify-between">
          <div>
            <h2 className="font-semibold text-lg mb-1 hover:text-[#3677A8] cursor-pointer">
              {post.title}
            </h2>
            <p className="text-xs text-gray-500 mb-1">
              by {post.createdByName} •{" "}
              {new Date(post.createdAt).toLocaleDateString("id-ID", {
                day: "numeric",
                month: "long",
                year: "numeric",
              })}{" "}
              • 💬 0
            </p>
            <p className="text-sm text-gray-600 mb-2 line-clamp-2">
              {post.description}
            </p>
          </div>
          <button className="bg-black text-white text-xs px-3 py-1 hover:bg-gray-800 w-fit">
            Read more
          </button>
        </div>
      </Link>
    </div>
  );
}