---
import Layout from '../../layouts/Layout.astro';

import { getCollection, getEntry } from 'astro:content';
import Comments from "../../components/Comments.astro";
import {getImage, Image} from "astro:assets";
import {siteConfig} from "../../config";
import ReplyViaEmail from "../../components/ReplyViaEmail.astro";
import { ExtractFirstImage } from '../../plugins/extract-images';
import AuthorInfo from "../../components/helper/authors/Info.astro";
import TableOfContents from "../../components/TableOfContents.astro";
import "katex/dist/katex.css"

export async function getStaticPaths() {
  const blogEntries = await getCollection('posts');
  return blogEntries.map(entry => ({
    params: { slug: entry.slug }, props: { entry },
  }));
}

const { entry } = Astro.props;
const { Content, headings, remarkPluginFrontmatter } = await entry.render();

const noscript = siteConfig.noClientJavaScript
const slug = Astro.params.slug;
const author = Array.isArray(entry.data.author) ? entry.data.author : (entry.data.author !== undefined ? [entry.data.author] : [{collection: 'authors', id: siteConfig.defaultAuthor.id}]);

// Get Wordcount and Last Updated Date
const wordcount = remarkPluginFrontmatter.wordcount;
const lastUpdated = remarkPluginFrontmatter.lastModified;

// Get author data
const authorData = await Promise.all((author).map((singleAuthor) => getEntry(singleAuthor).then(authorEntry => authorEntry?.data)))
const authorInfo =  authorData.includes(undefined) ? [{data: siteConfig.defaultAuthor}] : authorData;

// get featured image and use it as og:image
// use the custom cover image if it exists, otherwise use the featured image file in the same directory
const featuredImages = import.meta.glob(`/src/content/posts/*/featured.{avif,png,jpg,jpeg,webp}`,{import:'default',eager:true});
const customFeaturedImage = entry.data.cover?.src
const matchedImage = Object.keys(featuredImages).find(path => path.includes(slug));
let matchedImage_src;
if (matchedImage && !customFeaturedImage) {
    matchedImage_src = await getImage({src: featuredImages[matchedImage] as ImageMetadata, format: 'webp'}) || null;
}
const firstImageURL = await ExtractFirstImage(Content)

const cover = customFeaturedImage || matchedImage_src?.src || firstImageURL || `/blog/${slug}/featured.png` || '';
---

<Layout
  title={entry.data.title}
  description={entry.data.description}
  ogImage={cover}
  author={authorInfo.map((a: any) => a.name).join(', ')}
>
    <article>
        <h1 class="title">{entry.data.title}</h1>
            {authorInfo.map((a: any) => <AuthorInfo data={a} />)}
        <span class="date">{new Date(entry.data.pubDate).toISOString().split('T')[0]}</span>
        <span class="date">(Updated on {new Date(lastUpdated).toISOString().split('T')[0]})</span>
        <span>|</span>
        <span class="wordcount">{wordcount.words} words</span>
        { (cover && cover !== firstImageURL && cover !== `/blog/${slug}/featured.png`) && <Image class="cover" width=720 height=480 src={cover} alt={`cover of ${entry.data.title}`}  /> }
        {headings.length !== 0 && <TableOfContents headings={headings} />}
        {entry.data.summary && <p class="summary">{entry.data.summary}</p> }
        <div class="content">
            <Content />
        </div>
    </article>
    <div class="extra-post" style="margin-top: 2rem; border-top: 1px solid var(--border-color); padding-top: 1rem;">
        <ReplyViaEmail title={entry.data.title} email={authorInfo[0].email} />
            <br>
        <a href="/blog">&larr; Back to posts</a>
        {!noscript && <h2>Comments</h2> <Comments />}
        {!noscript &&
            <script>
                import "katex/dist/contrib/copy-tex.js"
            </script>
        }
    </div>
</Layout>
<style>
    p.summary {
        font-style: italic;
        color: var(--secondary-text-color);
        margin: 1rem;
    }
    img.cover {
        width: 100%;
        height: auto;
        margin: 1rem auto;
    }
</style>