import Banner from "@/components/banner/Banner";
import Category from "@/components/sidebar/Category";
import { getSiteSettings } from "@/utils/data";
import { notFound } from 'next/navigation';
import DynamicListPage from "@/components/common/DynamicListPage";
import { Suspense } from 'react';
import { getPageData, getAllSlugs } from "@/utils/data";

const LoadingSpinner = () => (
  <div className="flex justify-center items-center p-8">
    <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-500"></div>
  </div>
);

// Using a static value to comply with Next.js 15 build requirements.
// On-demand revalidation will be handled via the API route.
export const revalidate = 3600;

export async function generateStaticParams() {
  try {
    const slugs = await getAllSlugs();
    return slugs.map(slug => ({
      slug: slug,
    }));
  } catch (error) {
    console.error("Failed to generate static params:", error);
    return [];
  }
}

export async function generateMetadata({ params }) {
  const resolvedParams = await params;
  const slugArr = resolvedParams.slug;
  const { data, error, page_info } = await getPageData({
    slug_list: slugArr,
    downloadFiles: false // Do not download files for metadata
  });
  const siteSettings = await getSiteSettings();
  const siteTitle = siteSettings.site_title || '';
  const siteName = siteSettings.site_name || '';
  const siteNameInPageTitles = siteSettings.site_name_in_page_titles || 'None';

  let title = '';
  if (error) {
    title = error.title || 'Page Error';
    return {
      title,
      description: error.message || '',
    };
  }
  if (Array.isArray(data) && page_info) {
    title = page_info.meta_title || page_info.title || '';
    if (siteName && title) {
      if (siteNameInPageTitles === 'After') {
        title = `${title} - ${siteName}`;
      } else if (siteNameInPageTitles === 'Before') {
        title = `${siteName} - ${title}`;
      }
    }
    return {
      title,
      description: page_info.meta_description || '',
    };
  }
  title = data?.meta_title || data?.title || '';
  if (siteName && title) {
    if (siteNameInPageTitles === 'After') {
      title = `${title} - ${siteName}`;
    } else if (siteNameInPageTitles === 'Before') {
      title = `${siteName} - ${title}`;
    }
  }
  return {
    title,
    description: data?.meta_description || '',
  };
}

export default async function DynamicPage({ params, searchParams }) {
  const resolvedParams = await params;
  const slugArr = resolvedParams.slug;
  const siteSettings = await getSiteSettings();
  const pageSize = Number(siteSettings.page_size) || 12;

  // 始终获取第一页的数据用于静态生成
  const { data, error, total } = await getPageData({
    slug_list: slugArr,
    page: 1,
    page_size: pageSize,
    downloadFiles: false,
    rewriteToProxy: true
  });

  if (error) {
    notFound();
  }

  const bannerComponentName = 'Banner-' + (slugArr[0] || 'home');
  const categoryComponentName = 'Category-' + (slugArr[0] || 'home');

  if (Array.isArray(data)) {
    const currentPath = '/' + (Array.isArray(slugArr) ? slugArr.join('/') : '');
    const listColumns = 4;

    return (
      <>
        <Banner componentName={bannerComponentName} />
        <div className="wrapper !bg-[#ffffff]">
          <div className="container py-[4.5rem] xl:!py-24 lg:!py-24 md:!py-24">
            <div className="flex flex-col md:flex-row mx-[-15px] xl:mx-[-35px] lg:mx-[-20px]">
              <Category componentName={categoryComponentName} />
              <div className="flex-1 min-w-0 !px-[15px] max-w-full md:!px-[20px] lg:!px-[20px] xl:!px-[35px]">
                <Suspense fallback={<LoadingSpinner />}>
                  <DynamicListPage
                    initialItems={data}
                    slugArr={slugArr}
                    basePath={currentPath}
                    columns={listColumns}
                    pageSize={pageSize}
                    totalItems={total}
                    searchParams={searchParams}
                  />
                </Suspense>
              </div>
            </div>
          </div>
        </div>
      </>
    );
  } else if (data) {
    return (
      <>
        <Banner componentName={bannerComponentName} />
        <div className="wrapper !bg-[#ffffff]">
          <div className="container py-[4.5rem] xl:!py-24 lg:!py-24 md:!py-24">
            <div className="flex flex-col md:flex-row mx-[-15px] xl:mx-[-35px] lg:mx-[-20px]">
              <Category componentName={categoryComponentName} />
              <div className="flex-1 min-w-0 !px-[15px] max-w-full md:!px-[20px] lg:!px-[20px] xl:!px-[35px]">
                <div className="bg-white rounded-lg shadow-md p-6 md:p-10">
                  {/* 图片和附加信息并排显示，响应式优化 */}
                  {(data.image || data.subtitle) && (
                    <div className="flex flex-col md:flex-row gap-4 md:gap-8 mb-6 md:mb-8 items-center md:items-start w-full max-w-full">
                      {data.image && (
                        <div className="flex-shrink-0 w-full md:w-100 flex justify-center md:justify-start mb-4 md:mb-0 max-w-full">
                          <img
                            src={data.image}
                            alt={data.title}
                            className="w-full max-w-[320px] md:max-w-full max-h-60 md:max-h-72 rounded-xl shadow-lg object-contain"
                          />
                        </div>
                      )}
                      {data.subtitle && (
                        <div className="bg-gray-50 rounded-md p-3 md:p-4 whitespace-pre-line text-gray-700 w-full shadow-sm max-w-full prose prose-sm">
                          {data.subtitle}
                        </div>
                      )}
                    </div>
                  )}
                  <div className="prose max-w-none text-gray-700 mb-6 md:mb-8 px-1 md:px-0 prose-img:max-w-full prose-img:h-auto prose-table:border prose-table:border-gray-300 prose-th:border prose-th:border-gray-300 prose-td:border prose-td:border-gray-300 prose-th:bg-gray-50 prose-table:rounded-lg prose-table:overflow-hidden" dangerouslySetInnerHTML={{ __html: data.content || '' }} />
                  {data.additional_content && (
                    <>
                      <div className="prose max-w-none text-gray-700 mt-6 md:mt-8 px-1 md:px-0 prose-img:max-w-full prose-img:h-auto prose-table:border prose-table:border-gray-300 prose-th:border prose-th:border-gray-300 prose-td:border prose-td:border-gray-300 prose-th:bg-gray-50 prose-table:rounded-lg prose-table:overflow-hidden" dangerouslySetInnerHTML={{ __html: data.additional_content }} />
                    </>
                  )}
                </div>
              </div>
            </div>
          </div>
        </div>
      </>
    );
  } else {
    notFound();
  }
}