---
const { lang = "zh" } = Astro.props;
const host = import.meta.env.PUBLIC_REMARK42_HOST;
const siteId = import.meta.env.PUBLIC_REMARK42_SITE_ID;
const max = 10;
const heading = lang === "zh" ? "最新评论" : "Latest comments";
---

<section
    class="latest-comments"
    data-lang={lang}
    data-host={host}
    data-site-id={siteId}
    data-max={max}
>
    <h2>{heading}</h2>

    <div class="comments-loading" aria-hidden="true">
        <div class="loading-card"></div>
        <div class="loading-card"></div>
        <div class="loading-card"></div>
    </div>

    <div class="latest-comments-list" aria-live="polite"></div>
</section>

<script is:inline data-astro-rerun>
    function escapeHtml(str) {
        return String(str ?? "")
            .replaceAll("&", "&amp;")
            .replaceAll("<", "&lt;")
            .replaceAll(">", "&gt;")
            .replaceAll('"', "&quot;")
            .replaceAll("'", "&#39;");
    }

    function formatTime(input, lang) {
        try {
            const date = new Date(input);
            return new Intl.DateTimeFormat(lang === "zh" ? "zh-CN" : "en", {
                year: "numeric",
                month: "short",
                day: "numeric",
            }).format(date);
        } catch {
            return "";
        }
    }

    function rewritePostUrl(url, lang) {
        if (!url) return "#";

        if (url.startsWith("/posts/")) {
            return `/${lang}${url}`;
        }

        try {
            const u = new URL(url, window.location.origin);
            if (u.pathname.startsWith("/posts/")) {
                return `/${lang}${u.pathname}${u.search}${u.hash}`;
            }
            return u.pathname + u.search + u.hash;
        } catch {
            return url;
        }
    }

    function getAvatar(item) {
        return (
            item?.user?.picture || item?.user?.photo || item?.user?.avatar || ""
        );
    }

    function getUserName(item, lang) {
        return item?.user?.name || (lang === "zh" ? "匿名用户" : "Anonymous");
    }

    function renderComments(root, comments, lang) {
        const list = root.querySelector(".latest-comments-list");
        const loading = root.querySelector(".comments-loading");
        if (!list || !loading) return;

        if (!Array.isArray(comments) || comments.length === 0) {
            loading.style.display = "none";
            list.innerHTML = `<p class="latest-comments-empty">${
                lang === "zh" ? "还没有评论" : "No comments yet"
            }</p>`;
            return;
        }

        list.innerHTML = comments
            .map((item) => {
                const author = escapeHtml(getUserName(item, lang));
                const avatar = getAvatar(item);
                const safeAvatar = escapeHtml(avatar || "");
                const title = escapeHtml(
                    item?.title ||
                        (lang === "zh" ? "未命名文章" : "Untitled post"),
                );
                const href = rewritePostUrl(item?.locator?.url || "", lang);
                const html = item?.text || "";
                const time = formatTime(item?.time, lang);

                const avatarHtml = avatar
                    ? `<img class="comment-avatar-img" src="${safeAvatar}" alt="${author}" loading="lazy" referrerpolicy="no-referrer" />`
                    : `<div class="comment-avatar-fallback" aria-hidden="true">${author.slice(0, 1).toUpperCase()}</div>`;

                return `
          <article class="comment-card">
            <div class="comment-card-body">
              <div class="comment-card-info">
                <div class="comment-avatar">
                  ${avatarHtml}
                </div>

                <div class="comment-meta">
                  <div class="comment-author-row">
                    <span class="comment-author">@${author}</span>
                    ${time ? `<span class="comment-time">${escapeHtml(time)}</span>` : ""}
                  </div>
                </div>
              </div>

              <div class="comment-card-title">
                <a class="comment-title-link" href="${href}">${title}</a>
              </div>

              <div class="comment-card-text">${html}</div>
            </div>
          </article>
        `;
            })
            .join("");

        loading.style.display = "none";
    }

    async function loadLatestComments(section) {
        if (!section) return;

        const host = section.dataset.host;
        const siteId = section.dataset.siteId;
        const max = section.dataset.max || "10";
        const lang = section.dataset.lang || "zh";

        const list = section.querySelector(".latest-comments-list");
        const loading = section.querySelector(".comments-loading");
        if (!host || !siteId || !list || !loading) return;

        loading.style.display = "";
        list.innerHTML = "";

        const url = `${host}/api/v1/last/${encodeURIComponent(max)}?site=${encodeURIComponent(siteId)}`;

        try {
            const res = await fetch(url, { credentials: "omit" });
            if (!res.ok) {
                throw new Error(`HTTP ${res.status}`);
            }

            const data = await res.json();
            renderComments(section, data, lang);
        } catch (err) {
            loading.style.display = "none";
            list.innerHTML = `<p class="latest-comments-empty">${
                lang === "zh"
                    ? "最新评论加载失败"
                    : "Failed to load latest comments"
            }</p>`;
            console.error("latest comments load failed:", err);
        }
    }

    document.querySelectorAll(".latest-comments").forEach(loadLatestComments);
</script>