import Link from "next/link"
import ReactMarkdown from "react-markdown"
import styles from "../styles/BlogList.module.css"
import Image from "next/image"

function truncateSummary(content) {
    return content.slice(0, 200).trimEnd()
}

function reformatDate(fullDate) {
    const date = new Date(fullDate)
    return date.toDateString().slice(4)
}

const BlogList = ({ allBlogs }) => {
    return (
        <ul>
            {
                allBlogs && allBlogs.length > 1 &&
                allBlogs
                .sort((post1,post2) => {
                    if(post1.slug < post2.slug) return 1
                    if(post1.slug > post2.slug) return -1
                    return 0
                })
                .map(post => (
                    <li key={post.slug}>
                        <Link href={{ pathname: `/blog/${post.slug}` }} className={styles.blog__link}>
                            <div className={styles.hero_image}>
                                <Image
                                    width={384}
                                    height={288}
                                    src={post.frontmatter.hero_image}
                                    alt={post.frontmatter.hero_image}
                                />
                            </div>
                            <div className={styles.blog__info}>
                                <h2>{post.frontmatter.title}</h2>
                                <h3>{reformatDate(post.frontmatter.date)}</h3>
                                <ReactMarkdown disallowedElements={["a"]}>{truncateSummary(post.markdownBody)}</ReactMarkdown>
                            </div>
                        </Link>
                    </li>
                ))
            }
        </ul>
    )
}

export default BlogList