---
const { slug } = Astro.props;
---
<div class="like-view-counter likes-views" data-counter>
  <button class="like-button" type="button" data-like data-slug={slug} aria-label="Like this article" aria-pressed="false">
    <span aria-hidden="true">♡</span> <span class="like-count" data-likes>—</span>
  </button>
  <span aria-label="Article views">Views: <span class="view-count" data-views>—</span></span>
</div>
<script>
  const apiBase = import.meta.env.PUBLIC_AIA_API_BASE || 'https://api.azinstitute4autism.com';

  const cleanSlug = (raw: string | undefined) =>
    raw ? raw.split('?')[0].replace(/^\/+|\/+$/g, '') : '';

  const readCookies = () =>
    Object.fromEntries(
      document.cookie
        .split('; ')
        .filter(Boolean)
        .map((pair) => pair.split('=').map(decodeURIComponent)),
    );

  const setLikedCookie = (name: string, liked: boolean) => {
    if (!liked) {
      document.cookie = `${encodeURIComponent(name)}=; Max-Age=0; path=/`;
      return;
    }

    const expires = new Date(Date.now() + 365 * 864e5).toUTCString();
    document.cookie = `${encodeURIComponent(name)}=1; expires=${expires}; path=/`;
  };

  const fetchJson = async (url: string, options: RequestInit) => {
    const response = await fetch(url, options);
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
    return response.json();
  };

  document.querySelectorAll<HTMLElement>('[data-counter]').forEach(async (counter) => {
    const button = counter.querySelector<HTMLButtonElement>('[data-like]');
    const slug = cleanSlug(button?.dataset.slug);
    const likes = counter.querySelector<HTMLElement>('[data-likes]');
    const views = counter.querySelector<HTMLElement>('[data-views]');
    if (!button || !slug) return;

    const cookieName = `liked_${slug}`;
    const renderLiked = (liked: boolean) => {
      button.classList.toggle('liked', liked);
      button.setAttribute('aria-pressed', String(liked));
    };

    renderLiked(Object.prototype.hasOwnProperty.call(readCookies(), cookieName));

    try {
      const data = await fetchJson(`${apiBase}/stats/batch`, {
        method: 'POST',
        credentials: 'include',
        cache: 'no-store',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ slugs: [slug] }),
      });
      const stats = data[slug];
      if (likes) likes.textContent = String(stats?.likes ?? 0);
      if (views) views.textContent = String(stats?.views ?? 0);
    } catch {
      counter.dataset.unavailable = 'true';
      if (likes) likes.textContent = '0';
      if (views) views.textContent = '—';
    }

    button.addEventListener('click', async () => {
      const willLike = !button.classList.contains('liked');
      button.disabled = true;

      try {
        const data = await fetchJson(
          willLike ? `${apiBase}/likes` : `${apiBase}/likes/${encodeURIComponent(slug)}`,
          willLike
            ? {
                method: 'POST',
                credentials: 'include',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ slug }),
              }
            : { method: 'DELETE', credentials: 'include' },
        );
        setLikedCookie(cookieName, willLike);
        renderLiked(willLike);
        if (likes) likes.textContent = String(data.count ?? 0);
      } catch {
        counter.dataset.unavailable = 'true';
      } finally {
        button.disabled = false;
      }
    });
  });
</script>

<style>
  .like-view-counter { align-items: center; border-top: 1px solid var(--color-border); display: flex; gap: var(--space-lg); margin-block: var(--space-xl); padding-top: var(--space-md); }
  .like-view-counter button { background: white; border: 1px solid var(--color-border); border-radius: 999px; padding: .6rem 1rem; }
  .like-view-counter button.liked { background: var(--color-primary-dark); border-color: var(--color-primary-dark); color: white; }
  .like-view-counter button:disabled { cursor: wait; opacity: .65; }
</style>