---
import type { CollectionEntry } from "astro:content";

interface Props {
  posts: CollectionEntry<"posts">[];
}

const { posts } = Astro.props;

const fmtDate = (d: Date) =>
  d.toLocaleDateString("en-US", {
    year: "numeric",
    month: "short",
    day: "numeric",
  });
---

<aside class="related" aria-label="Related posts">
  <h2 class="related-heading">Related Posts</h2>
  <ul class="related-list">
    {posts.map((post) => (
      <li class="related-item">
        <a href={`/posts/${post.id}/`} class="related-link">
          <div class="related-thumb">
            {post.data.image ? (
              <img src={post.data.image} alt={post.data.title} class="thumb-img" loading="lazy" decoding="async" />
            ) : (
              <span class="thumb-placeholder">{post.data.title.charAt(0)}</span>
            )}
          </div>
          <div class="related-info">
            <div class="related-meta">
              <span class="badge">{post.data.category}</span>
              <span class="text-muted text-xs">{fmtDate(post.data.date)}</span>
            </div>
            <strong class="related-title">{post.data.title}</strong>
            {post.data.description && (
              <p class="related-desc">{post.data.description}</p>
            )}
          </div>
        </a>
      </li>
    ))}
  </ul>
</aside>

<style>
  .related {
    border-top: 1px solid var(--border);
    padding-top: var(--space-8);
    margin-top: var(--space-10);
  }

  .related-heading {
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
  }

  .related-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
  }

  .related-item {
    border-top: 1px solid var(--border);
  }

  .related-item:first-child {
    border-top: none;
  }

  .related-link {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-2);
    text-decoration: none;
    color: inherit;
    transition: background-color var(--duration-fast) var(--ease-out);
  }

  .related-link:hover {
    background-color: var(--bg-surface-hover);
  }

  .related-thumb {
    aspect-ratio: 3 / 2;
    overflow: hidden;
    background-color: var(--bg-surface-hover);
  }

  .thumb-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter var(--duration-normal) var(--ease-out);
  }

  .related-link:hover .thumb-img {
    filter: grayscale(0%);
  }

  .thumb-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-muted);
    opacity: 0.3;
  }

  .related-info {
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .related-meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
  }

  .related-title {
    font-size: var(--text-base);
    color: var(--text);
    display: block;
  }

  .related-desc {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-top: var(--space-1);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  @media (max-width: 600px) {
    .related-link {
      grid-template-columns: 1fr;
      gap: var(--space-3);
    }

    .related-thumb {
      aspect-ratio: 16 / 9;
    }
  }
</style>