/**
 * # 路由 产品列表 /collection/（原站 /shop/ 的等价页）
 * 原站 /shop/ 使用 WooCommerce 归档模板（elementor_library post 1398）：
 *  - a2ab15c：面包屑 hero（bg #F4F5F8）
 *  - 65176b9：左侧 WPC 筛选（20% 列）+ 右侧 “IoT Products” 标题、排序、24 商品 4 列网格、分页
 * 本路由以 ElementorRenderer 直出该模板外壳，按 widget id 注入：
 *  - 98d2008 → ShopFilters（属性复选筛选，URL query 驱动）
 *  - d761846 → ShopProducts（WooCommerce 归档网格 + 排序 + 分页）
 * 模板缺失时降级为内置分类卡片 + 简单网格。
 */
import { createFileRoute, Link } from "@tanstack/react-router";
import { createServerFn } from "@tanstack/react-start";
import { getLayoutData, Layout } from "~/components/website/Layout";
import { ElementorRenderer, extractElementor } from "~/components/elementor/Renderer";
import { ProductCard } from "~/components/website/ProductCard";
import { Pagination } from "~/components/website/Pagination";
import { Breadcrumb, BreadcrumbList, BreadcrumbItem, BreadcrumbLink, BreadcrumbPage, BreadcrumbSeparator } from "~/components/ui/breadcrumb";
import { parseCollectionSearch, searchToFilters, type CollectionSearch } from "~/components/website/collection-shared";
import { ShopFilters } from "~/components/website/ShopFilters";
import { ShopProducts, orderByToSort } from "~/components/website/ShopProducts";
import { getFilterConfig, getProductCategoryTree, getShopTemplate, listProducts, type ProductListResult } from "~/server/data";
import { useT } from "~/i18n";

export const Route = createFileRoute("/collection/")({
  validateSearch: parseCollectionSearch as (search: Record<string, unknown>) => CollectionSearch,
  loaderDeps: ({ search }) => ({ search }),
  loader: async ({ deps }) => loadCollection({ data: deps.search }),
  head: () => ({
    meta: [
      { title: "All Products | IoT Gateways & Devices | Dusun IoT" },
      { name: "description", content: "Browse all Dusun IoT products: industrial IoT gateways, single board computers, wireless modules and smart IoT devices." },
    ],
  }),
  component: CollectionIndexPage,
});

/** # 函数 产品归档页数据加载（Server Function：客户端导航时由服务端执行，
 * 避免把 db/查询层打进浏览器包；返回纯 JSON） */
const loadCollection = createServerFn({ method: "GET" })
  .validator((d: CollectionSearch) => d)
  .handler(async ({ data: search }) => {
    const filters = searchToFilters(search);
    const [layout, cats, list, shop, filterConfig] = await Promise.all([
      getLayoutData(),
      getProductCategoryTree().catch(() => []),
      listProducts({ page: search.page, filters, pageSize: 24, sort: orderByToSort(search.orderby) }).catch(
        () => ({ items: [], total: 0, page: 1, pageSize: 24 }) as ProductListResult,
      ),
      getShopTemplate().catch(() => null),
      getFilterConfig().catch(() => []),
    ]);
    // Elementor 文档是递归 JSON，TanStack 序列化校验无法展开；运行时为纯 JSON
    return { layout, cats, list, shop, filters, filterConfig, search } as any;
  });

/** # 类型 归档页 loader 数据 */
type CollectionData = {
  layout: any;
  cats: { id: number; name: string; slug: string; parentId: number | null; count: number }[];
  list: ProductListResult;
  shop: { meta?: unknown } | null;
  filters: Record<string, string[]>;
  filterConfig: { name: string; slug: string; values: { value: string; slug: string; count: number }[] }[];
  search: CollectionSearch;
};

/** # 组件 全部产品列表页 */
function CollectionIndexPage() {
  const data = Route.useLoaderData();
  const shopDoc = extractElementor(data.shop?.meta);
  if (shopDoc) {
    return (
      <Layout layout={data.layout}>
        <ElementorRenderer
          doc={shopDoc}
          vars={{ breadcrumb: [{ label: "Home", url: "/" }, { label: "Shop" }] }}
          shortcodes={{
            "98d2008": (
              <ShopFilters config={data.filterConfig} selected={data.filters} total={data.list.total} search={data.search} />
            ),
            "d761846": (
              <ShopProducts
                items={data.list.items}
                total={data.list.total}
                page={data.list.page}
                pageSize={data.list.pageSize}
                search={data.search}
              />
            ),
          }}
        />
      </Layout>
    );
  }
  return <FallbackCollectionPage data={data} />;
}

/** # 组件 降级列表页（归档模板缺失时） */
function FallbackCollectionPage(props: { data: CollectionData }) {
  const t = useT();
  const data = props.data;
  const topCats = data.cats.filter((c) => !c.parentId && c.slug !== "uncategorized");
  return (
    <Layout layout={data.layout}>
      <div className="site-container">
        <Breadcrumb aria-label="Breadcrumb">
          <BreadcrumbList>
            <BreadcrumbItem><BreadcrumbLink to="/">{t("nav_home")}</BreadcrumbLink></BreadcrumbItem>
            <BreadcrumbSeparator />
            <BreadcrumbItem><BreadcrumbPage>{t("nav_products")}</BreadcrumbPage></BreadcrumbItem>
          </BreadcrumbList>
        </Breadcrumb>
        <h1 className="text-[28px]">{t("nav_all_products")}</h1>
        <p className="text-muted-foreground">{t("collection_products_count", { total: data.list.total })}</p>

        <section className="mt-5 mb-8">
          <div className="grid grid-cols-2 gap-[18px] min-[960px]:grid-cols-4">
            {topCats.map((c) => (
              <Link key={c.id} to="/collection/$slug/" params={{ slug: c.slug }} className="block overflow-hidden rounded-lg border border-line bg-white text-brand transition-[box-shadow,transform] duration-200 hover:-translate-y-0.5">
                <div className="px-4 pt-3.5 pb-[18px]">
                  <div className="mb-1.5 text-[15px] leading-[1.45] font-semibold">{c.name}</div>
                  <div className="text-[13px] text-muted-foreground">{t("collection_products_count", { total: Number(c.count) })}</div>
                </div>
              </Link>
            ))}
          </div>
        </section>

        <div className="grid grid-cols-2 gap-[18px] min-[960px]:grid-cols-4">
          {data.list.items.map((p) => (
            <ProductCard key={p.id} p={p} />
          ))}
          {data.list.items.length === 0 ? <p className="py-[60px] text-center text-muted-foreground">No products found.</p> : null}
        </div>
        <Pagination page={data.list.page} total={data.list.total} pageSize={data.list.pageSize} makeHref={(p) => `/collection/?page=${p}`} />
      </div>
    </Layout>
  );
}