import { pages as posts } from 'site/prebuild/showcase.mjs'
import { getPostSlugPaths } from 'site/components/mdx/posts/utils.mjs'
import { serverSideTranslations } from 'next-i18next/serverSideTranslations'
import { useDynamicMdx } from 'shared/hooks/use-dynamic-mdx.mjs'
import { useCallback } from 'react'
import { PostLayout, ns as layoutNs } from 'site/components/layouts/post.mjs'
import { PostArticle, ns as postNs } from 'site/components/mdx/posts/article.mjs'
import { PageWrapper, ns as pageNs } from 'shared/components/wrappers/page.mjs'

const namespaces = [...layoutNs, ...postNs, ...pageNs]

/*
 * Each page MUST be wrapped in the PageWrapper component.
 * You also MUST spread props.page into this wrapper component
 * when path and locale come from static props (as here)
 * or set them manually.
 */
const ShowcasePage = ({ locale, dir, page }) => {
  // function to load the correct markdown
  const loader = useCallback(
    () => import(`orgmarkdown/showcase/${dir}/${locale}.md`),
    [dir, locale]
  )

  const { frontmatter, MDX } = useDynamicMdx(loader)

  return (
    <PageWrapper
      {...page}
      locale={locale}
      title={frontmatter.title}
      layout={(props) => <PostLayout {...props} {...{ slug: page.path.join('/'), frontmatter }} />}
    >
      <PostArticle {...{ frontmatter, MDX }} imgId={`showcase-${dir}`} />
    </PageWrapper>
  )
}

/*
 * getStaticProps() is used to fetch data at build-time.
 *
 * On this page, it it passes the name of the bundle to be loaded on the client.
 *
 * This, in combination with getStaticPaths() below means this
 * page will be used to render/generate all showcase content.
 *
 * To learn more, see: https://nextjs.org/docs/basic-features/data-fetching
 */
export async function getStaticProps({ params, locale }) {
  const { dir } = params

  // if the dir isn't present in the prebuilt posts, return 404
  if (!Object.keys(posts[locale]).includes(`showcase/${dir}`)) return { notFound: true }

  return {
    props: {
      dir,
      locale,
      ...(await serverSideTranslations(locale, namespaces)),
      page: {
        locale,
        path: ['showcase', dir],
      },
    },
  }
}

/*
 * getStaticPaths() is used to specify for which routes (think URLs)
 * this page should be used to generate the result.
 *
 * On this page, it is returning a truncated list of routes (think URLs) for all
 * the mdx showcase (markdown) content.
 * That list comes from prebuild/showcase-paths.mjs, which is built in the prebuild step
 * and contains paths, titles, imageUrls, and intro for all showcase posts.
 *
 * the fallback: 'blocking' property means that
 * any pages that haven't been pre-generated
 * will generate and cache the first time someone visits them
 *
 * To learn more, see: https://nextjs.org/docs/basic-features/data-fetching
 */
export const getStaticPaths = async () => {
  return {
    paths: getPostSlugPaths(posts),
    fallback: 'blocking',
  }
}

export default ShowcasePage