import type { Metadata } from "next";
import Link from "next/link";
import { ContentPageShell } from "@/components/ContentPageShell";
import { Pagination } from "@/components/Pagination";
import {
  categoryLabelFa,
  findPortfolioCategory,
  getDescendantCategoryIds,
  getRootCategories,
  portfolioCategoryHref,
  topPortfolioCategories,
  type PortfolioCategory,
} from "@/data/portfolioCategories";
import {
  getPortfolioCategories,
  getPortfolioCoverImage,
  getPortfolios,
  getPortfoliosByCategory,
} from "@/lib/api";

export const metadata: Metadata = {
  title: "نمونه‌کارها",
  description: "نمونه پروژه‌ها و کارهای انجام‌شده توسط تیم مشکی.",
  alternates: { canonical: "/portfolio" },
};

const PAGE_SIZE = 12;

type PortfolioPageProps = {
  searchParams: Promise<{ page?: string; category?: string }>;
};

function mapApiCategories(
  items: Awaited<ReturnType<typeof getPortfolioCategories>>,
): PortfolioCategory[] {
  return items.map((item) => ({
    id: String(item.id),
    slug: item.slug,
    nameEn: item.name,
    nameFa: item.nameFa || item.name,
    parentId: item.parentId,
    sortOrder: item.sortOrder ?? 0,
  }));
}

export default async function PortfolioListPage({
  searchParams,
}: PortfolioPageProps) {
  const { page: pageParam, category: categoryParam } = await searchParams;
  const page = Math.max(1, Number(pageParam) || 1);

  let allCategories: PortfolioCategory[] = topPortfolioCategories;
  try {
    allCategories = mapApiCategories(await getPortfolioCategories());
  } catch {
    allCategories = topPortfolioCategories;
  }

  const rootCategories = getRootCategories(allCategories);
  const activeCategory =
    findPortfolioCategory(categoryParam, allCategories) ??
    findPortfolioCategory(categoryParam, rootCategories);

  let items: Awaited<ReturnType<typeof getPortfolios>>["items"] = [];
  let total = 0;

  try {
    if (activeCategory) {
      const data = await getPortfoliosByCategory({
        categoryId: activeCategory.id,
        categoryIds: getDescendantCategoryIds(allCategories, activeCategory.id),
        page,
        pageSize: PAGE_SIZE,
      });
      items = data.items;
      total = data.total;
    } else {
      const data = await getPortfolios({ page, pageSize: PAGE_SIZE });
      items = data.items;
      total = data.total;
    }
  } catch {
    items = [];
    total = 0;
  }

  const paginationQuery = activeCategory
    ? { category: activeCategory.slug }
    : undefined;

  const filterCategories =
    rootCategories.length > 0 ? rootCategories : topPortfolioCategories;

  return (
    <ContentPageShell>
      <section className="pb-20 lg:pb-28">
        <div className="mx-auto max-w-7xl px-5 lg:px-8">
          <div className="reveal mb-10 max-w-2xl md:mb-12">
            <h1 className="whitespace-normal text-[clamp(1.35rem,3.6vw,2.75rem)] font-normal tracking-tight text-ink">
              نمونه‌کارها
            </h1>
            <p className="latin title-en text-muted">
              Portfolio
            </p>
            <p className="mt-5 text-sm leading-8 text-muted md:text-base">
              نگاهی به پروژه‌ها و کارهای انجام‌شده توسط تیم مشکی.
            </p>
          </div>

          <div className="reveal mb-10 flex flex-wrap gap-2 md:mb-12">
            <Link
              href="/portfolio"
              className={`rounded-full border px-4 py-2 text-sm transition ${
                !activeCategory
                  ? "border-ink bg-ink text-surface"
                  : "border-line/70 text-ink-soft hover:border-ink/30 hover:text-ink"
              }`}
            >
              همه
            </Link>
            {filterCategories.map((category) => {
              const active = activeCategory?.id === category.id;
              return (
                <Link
                  key={category.id}
                  href={portfolioCategoryHref(category.slug)}
                  className={`rounded-full border px-4 py-2 text-sm transition ${
                    active
                      ? "border-ink bg-ink text-surface"
                      : "border-line/70 text-ink-soft hover:border-ink/30 hover:text-ink"
                  }`}
                >
                  {category.nameFa}
                </Link>
              );
            })}
          </div>

          {items.length === 0 ? (
            <p className="text-sm text-muted">
              نمونه‌کاری برای نمایش وجود ندارد.
            </p>
          ) : (
            <div
              key={`${activeCategory?.slug ?? "all"}-${page}`}
              className="grid gap-6 sm:grid-cols-2 lg:grid-cols-4"
            >
              {items.map((item, index) => {
                const image = getPortfolioCoverImage(item);
                const categoryFa = categoryLabelFa(
                  item.categoryName,
                  allCategories,
                );
                const titleFa = item.titleFa || item.title;
                const titleEn =
                  item.titleEn ??
                  (item.titleFa && item.title !== item.titleFa
                    ? item.title
                    : null);

                return (
                  <article
                    key={item.id}
                    className={`reveal group overflow-hidden rounded-2xl border border-line/70 ${
                      index % 4 === 1
                        ? "reveal-delay-1"
                        : index % 4 === 2
                          ? "reveal-delay-2"
                          : index % 4 === 3
                            ? "reveal-delay-3"
                            : ""
                    }`}
                  >
                    <Link href={`/portfolio/${item.slug}`} className="block">
                      <div className="relative overflow-hidden bg-paper-deep">
                        {image ? (
                          <img
                            src={image}
                            alt=""
                            className="h-auto w-full transition duration-700 group-hover:scale-105"
                          />
                        ) : null}
                      </div>
                      <div className="px-4 py-4">
                        <div className="relative mb-2 min-h-[3.25rem] overflow-hidden">
                          {titleEn ? (
                            <p
                              aria-hidden
                              className="latin pointer-events-none absolute inset-x-0 top-1/2 z-0 line-clamp-2 -translate-y-1/2 text-[clamp(1rem,2.2vw,1.35rem)] font-light uppercase leading-none tracking-[0.12em] text-ink/[0.07]"
                            >
                              {titleEn}
                            </p>
                          ) : null}
                          <h2 className="group-text-hover relative z-10 line-clamp-2 whitespace-normal text-base font-normal leading-7 text-ink">
                            {titleFa}
                          </h2>
                        </div>
                        {categoryFa ? (
                          <p className="text-[11px] text-muted">{categoryFa}</p>
                        ) : null}
                        {item.abstract ? (
                          <p className="mt-2 line-clamp-3 text-sm leading-6 text-muted">
                            {item.abstract}
                          </p>
                        ) : null}
                      </div>
                    </Link>
                  </article>
                );
              })}
            </div>
          )}

          <Pagination
            page={page}
            pageSize={PAGE_SIZE}
            total={total}
            basePath="/portfolio"
            query={paginationQuery}
          />
        </div>
      </section>
    </ContentPageShell>
  );
}