import tinytime from 'tinytime'
import Link from 'next/link'
import { getAllFilesFrontMatter } from '@/lib/mdx'
import siteMetadata from '@/data/siteMetadata'
import Tag from '@/components/Tag'

const MAX_DISPLAY = 5
const postDateTemplate = tinytime('{MMMM} {DD}, {YYYY}')

export async function getStaticProps() {
  const posts = await getAllFilesFrontMatter('blog')

  return { props: { posts } }
}

export default function Home({ posts }) {
  return (
    <div>
      <div className="divide-y divide-gray-200 dark:divide-gray-700">
        <div className="pt-6 pb-8 space-y-2 md:space-y-5">
          <h1 className="text-3xl leading-9 font-extrabold text-gray-900 dark:text-gray-100 tracking-tight sm:text-4xl sm:leading-10 md:text-6xl md:leading-14">
            Latest
          </h1>
          <p className="text-lg leading-7 text-gray-500 dark:text-gray-400">
            {siteMetadata.description}
          </p>
        </div>
        <ul className="divide-y divide-gray-200 dark:divide-gray-700">
          {!posts.length && 'No posts found.'}
          {posts.slice(0, MAX_DISPLAY).map((frontMatter) => {
            const { slug, date, title, summary, tags } = frontMatter
            return (
              <li key={slug} className="py-12">
                <article className="space-y-2 xl:grid xl:grid-cols-4 xl:space-y-0 xl:items-baseline">
                  <dl>
                    <dt className="sr-only">Published on</dt>
                    <dd className="text-base leading-6 font-medium text-gray-500 dark:text-gray-400">
                      <time dateTime={date}>{postDateTemplate.render(new Date(date))}</time>
                    </dd>
                  </dl>
                  <div className="space-y-5 xl:col-span-3">
                    <div className="space-y-6">
                      <div>
                        <h2 className="text-2xl leading-8 font-bold tracking-tight">
                          <Link href={`/blog/${slug}`}>
                            <a className="text-gray-900 dark:text-gray-100">{title}</a>
                          </Link>
                        </h2>
                        <div className="space-x-2">
                          {tags.map((tag) => (
                            <Tag key={tag} text={tag} />
                          ))}
                        </div>
                      </div>
                      <div className="prose max-w-none text-gray-500 dark:text-gray-400">
                        {summary}
                      </div>
                    </div>
                    <div className="text-base leading-6 font-medium">
                      <Link href={`/blog/${slug}`}>
                        <a
                          className="text-blue-500 hover:text-blue-600 dark:hover:text-blue-400"
                          aria-label={`Read "${title}"`}
                        >
                          Read more &rarr;
                        </a>
                      </Link>
                    </div>
                  </div>
                </article>
              </li>
            )
          })}
        </ul>
      </div>
      {posts.length > MAX_DISPLAY && (
        <div className="flex justify-end text-base leading-6 font-medium">
          <Link href="/blog">
            <a
              className="text-blue-500 hover:text-blue-600 dark:hover:text-blue-400"
              aria-label="all posts"
            >
              All Posts &rarr;
            </a>
          </Link>
        </div>
      )}
    </div>
  )
}