import { getPageImage, getPageMarkdownUrl, source } from '@/lib/source';
import {
  DocsBody,
  DocsDescription,
  DocsPage,
  DocsTitle,
  MarkdownCopyButton,
  ViewOptionsPopover,
} from 'fumadocs-ui/layouts/docs/page';
import { notFound } from 'next/navigation';
import { getMDXComponents } from '@/components/mdx';
import { OpenAPIPage } from '@/components/api-page';
import type { Metadata } from 'next';
import { createRelativeLink } from 'fumadocs-ui/mdx';
import { editUrl } from '@/lib/shared';

export default async function Page(props: PageProps<'/docs/[[...slug]]'>) {
  const params = await props.params;
  const page = source.getPage(params.slug);
  if (!page) notFound();

  // 由 OpenAPI spec 派生的虚拟参考页 —— 用专用渲染器(参数/请求/响应/试调)。
  if (page.type === 'openapi') {
    return (
      <DocsPage toc={page.data.toc} full>
        <DocsTitle>{page.data.title}</DocsTitle>
        <DocsDescription className="mb-0">{page.data.description}</DocsDescription>
        <DocsBody>
          <OpenAPIPage {...page.data.getOpenAPIPageProps()} />
        </DocsBody>
      </DocsPage>
    );
  }

  const MDX = page.data.body;
  const markdownUrl = getPageMarkdownUrl(page).url;

  return (
    <DocsPage toc={page.data.toc} full={page.data.full}>
      <DocsTitle>{page.data.title}</DocsTitle>
      <DocsDescription className="mb-0">{page.data.description}</DocsDescription>
      <div className="flex flex-row gap-2 items-center border-b pb-6">
        <MarkdownCopyButton markdownUrl={markdownUrl} />
        <ViewOptionsPopover
          markdownUrl={markdownUrl}
          githubUrl={editUrl(page.path)}
        />
      </div>
      <DocsBody>
        <MDX
          components={getMDXComponents({
            // this allows you to link to other pages with relative file paths
            a: createRelativeLink(source, page),
          })}
        />
      </DocsBody>
    </DocsPage>
  );
}

export async function generateStaticParams() {
  return source.generateParams();
}

export async function generateMetadata(props: PageProps<'/docs/[[...slug]]'>): Promise<Metadata> {
  const params = await props.params;
  const page = source.getPage(params.slug);
  if (!page) notFound();

  return {
    title: page.data.title,
    description: page.data.description,
    openGraph: {
      images: getPageImage(page).url,
    },
  };
}
