const MASTODON_ACCOUNT_ID = '109285376472065471'
const MASTODON_HOST = 'social.sd.ai'

async function copyElementTextToClipboard(e)
{
    const text = e.textContent
    await navigator.clipboard.writeText(text)

    e.classList.add('tootClick');
    setTimeout(() => {
        e.classList.remove('tootClick');
    }, 600);
}

function escapeHtml(unsafe) {
    return unsafe
        .replace(/&/g, "&")
        .replace(/</g, "&lt;")
        .replace(/>/g, "&gt;")
        .replace(/"/g, "&quot;")
        .replace(/'/g, "&#039;");
}

function renderMastodonContent(toots, parentElement, showLink) {
    parentElement.innerHTML = ''
    if (!Array.isArray(toots) || toots.length === 0) {
        document.getElementById('mastodon-comments-list').innerHTML = "<div class='mastodon-comment'>No comments (yet)!</div>"
        return
    }
    for (const toot of toots) {
        if (toot.sensitive) {
            continue
        }
        toot.account.display_name = escapeHtml(toot.account.display_name)
        toot.account.emojis.forEach(emoji => {
            toot.account.display_name = toot.account.display_name.replace(`:${emoji.shortcode}:`,
                `<img src="${escapeHtml(emoji.static_url)}" alt="Emoji ${emoji.shortcode}" class="mastodon-emoji" />`);
        })
        toot.emojis.forEach(emoji => {
            toot.content = toot.content.replace(`:${emoji.shortcode}:`,
                `<img src="${escapeHtml(emoji.static_url)}" alt="Emoji ${emoji.shortcode}" class="mastodon-emoji" />`);
        })
        const comment =
            `<div class="mastodon-comment">
               <div class="mastodon-avatar">
                 <img src="${escapeHtml(toot.account.avatar_static)}" height=60 width=60 alt="${escapeHtml(toot.account.display_name)}'s avatar">
               </div>
               <div class="mastodon-body">
                 <div class="mastodon-meta">
                   <div class="mastodon-author">
                     <div class="mastodon-author-link">
                       <a href="${toot.account.url}" target="_blank" rel="nofollow">
                         <span>${toot.account.display_name}</span>
                       </a>
                       <br/>
                       <span class="mastodon-author-uid">(@${escapeHtml(toot.account.acct === 's' ? 's@sd.ai' : toot.account.acct)})</span>
                     </div>
                   </div>
                   <div class="toot-link">
                     <a class="date" href="${toot.uri}" rel="nofollow" target="_blank">
                      ${toot.created_at.substring(0, 10)}
                    </a>
                    <br/>
                  </div>
                 </div>
                 <div class="mastodon-comment-content">
                   ${toot.content}
                   <span class="tootlink" ${showLink ? '' : 'style="display: none;"'}>${toot.uri}</span>
                 </div>
              </div>
            </div>`
        const child = DOMPurify.sanitize(comment, {'RETURN_DOM_FRAGMENT': true});
        const links = child.querySelectorAll('.tootlink');
        for (const link of links) {
            link.onclick = function() { return copyElementTextToClipboard(this); }
        }
        parentElement.appendChild(child);
    }
}

let MASTODON_POST_ID

document.addEventListener("DOMContentLoaded", async (event) => {
    let url, isComments
    const isBot = /bot|google|baidu|bing|msn|teoma|slurp|yandex/i
        .test(navigator.userAgent)
    if (document.getElementsByClassName('gh-sidebar').length > 0) {
        url = `https://${MASTODON_HOST}/api/v1/accounts/${MASTODON_ACCOUNT_ID}/statuses?exclude_replies=true&exclude_reblogs=true`
    }
    if (MASTODON_POST_ID && !isBot) {
        url = `https://${MASTODON_HOST}/api/v1/statuses/${MASTODON_POST_ID}/context`
        isComments = true
    }
    const element = document.getElementById('mastodon-comments-list')
    if (url && element) {
        const linkElement = document.getElementById('toot-link-top')
        const clipElement = document.getElementById('toot-link-clip')
        const tootUrl = `https://${MASTODON_HOST}/@s/${MASTODON_POST_ID}`
        if (linkElement) {
            linkElement.href = tootUrl
        }
        if (clipElement) {
            clipElement.innerText = tootUrl
        }
        const response = await fetch(url)
        let content = await response.json()
        if (isComments) {
            content = content.descendants
        }
        const header = document.getElementById('mastodon-comments-header')
        if (header) {
            header.style.display = ''
        }
        return renderMastodonContent(content, element, isComments)
    }
})