/* OPENBUREAU Dialog — flache Wortmeldungen pro Beitrag.
   Lesen öffentlich, Mitreden nach Login (eingeladene User). Kein Build nötig. */
(function () {
  const root = document.getElementById('ob-dialog');
  if (!root) return;
  const thread = root.dataset.thread || new URLSearchParams(location.search).get('thread') || '';
  if (!thread) { root.innerHTML = '<p class="dialog-empty">Kein Thema gewählt.</p>'; return; }
  const TKEY = 'ob_dialog_token', NKEY = 'ob_dialog_name';
  let token = localStorage.getItem(TKEY);
  let myName = localStorage.getItem(NKEY);
  let replyTo = null;
  let textarea = null;

  root.innerHTML = '';
  const title = document.createElement('h2');
  title.className = 'dialog-title'; title.textContent = 'Dialog';
  const list = document.createElement('div'); list.className = 'dialog-list';
  const composer = document.createElement('div'); composer.className = 'dialog-composer';
  root.append(title, list, composer);

  function fmt(ts) {
    const d = new Date(ts), s = (Date.now() - d) / 1000;
    if (s < 60) return 'gerade eben';
    if (s < 3600) return Math.floor(s / 60) + ' Min.';
    if (s < 86400) return Math.floor(s / 3600) + ' Std.';
    return d.toLocaleDateString('de-CH');
  }

  async function load() {
    let data = [];
    try {
      const res = await fetch('/api/comments?thread=' + encodeURIComponent(thread));
      if (res.ok) data = await res.json();
    } catch { /* offline */ }
    render(data);
  }

  function render(data) {
    list.innerHTML = '';
    const names = {}; data.forEach((c) => { names[c.id] = c.author_name; });
    if (!data.length) {
      const e = document.createElement('p'); e.className = 'dialog-empty';
      e.textContent = 'Noch keine Wortmeldungen — beginne den Dialog.';
      list.appendChild(e); return;
    }
    data.forEach((c) => {
      const card = document.createElement('article'); card.className = 'dialog-card';
      const head = document.createElement('header'); head.className = 'dialog-card-head';
      const av = document.createElement('span'); av.className = 'dialog-avatar';
      if (c.author_avatar) av.style.backgroundImage = 'url(' + c.author_avatar + ')';
      else av.textContent = (c.author_name || '?').slice(0, 1).toUpperCase();
      const meta = document.createElement('div'); meta.className = 'dialog-meta';
      const nm = document.createElement('span'); nm.className = 'dialog-name'; nm.textContent = c.author_name || 'Unbekannt';
      const tm = document.createElement('time'); tm.className = 'dialog-time'; tm.textContent = fmt(c.created_at);
      meta.append(nm, tm);
      if (c.parent_id && names[c.parent_id]) {
        const rp = document.createElement('span'); rp.className = 'dialog-replyto'; rp.textContent = '↳ ' + names[c.parent_id];
        meta.appendChild(rp);
      }
      head.append(av, meta); card.appendChild(head);
      const bd = document.createElement('div'); bd.className = 'dialog-body'; bd.textContent = c.body; card.appendChild(bd);
      if (token && !c.deleted) {
        const actions = document.createElement('div'); actions.className = 'dialog-actions';
        const rep = document.createElement('button'); rep.textContent = 'Antworten';
        rep.onclick = () => { replyTo = { id: c.id, name: c.author_name }; renderComposer(); if (textarea) textarea.focus(); };
        const del = document.createElement('button'); del.textContent = 'Löschen'; del.onclick = () => remove(c.id);
        actions.append(rep, del); card.appendChild(actions);
      }
      list.appendChild(card);
    });
  }

  function renderComposer() {
    composer.innerHTML = '';
    if (token) {
      if (replyTo) {
        const r = document.createElement('button'); r.className = 'dialog-replychip';
        r.textContent = 'Antwort auf ' + replyTo.name + '  ✕';
        r.onclick = () => { replyTo = null; renderComposer(); };
        composer.appendChild(r);
      }
      textarea = document.createElement('textarea'); textarea.className = 'dialog-textarea';
      textarea.placeholder = 'Deine Wortmeldung …';
      const row = document.createElement('div'); row.className = 'dialog-row';
      const send = document.createElement('button'); send.className = 'dialog-send'; send.textContent = 'Senden'; send.onclick = submit;
      const out = document.createElement('button'); out.className = 'dialog-logout'; out.textContent = 'Abmelden' + (myName ? ' · ' + myName : ''); out.onclick = logout;
      row.append(send, out); composer.append(textarea, row);
    } else {
      const hint = document.createElement('p'); hint.className = 'dialog-loginhint'; hint.textContent = 'Zum Mitreden anmelden:';
      const em = document.createElement('input'); em.type = 'email'; em.placeholder = 'E-Mail'; em.className = 'dialog-input';
      const pw = document.createElement('input'); pw.type = 'password'; pw.placeholder = 'Passwort'; pw.className = 'dialog-input';
      const btn = document.createElement('button'); btn.className = 'dialog-send'; btn.textContent = 'Anmelden';
      btn.onclick = () => doLogin(em.value, pw.value);
      pw.onkeydown = (e) => { if (e.key === 'Enter') doLogin(em.value, pw.value); };
      composer.append(hint, em, pw, btn);
    }
  }

  async function doLogin(email, password) {
    try {
      const res = await fetch('/api/auth/login', {
        method: 'POST', headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ email, password }),
      });
      const j = await res.json().catch(() => ({}));
      if (!res.ok) { alert(j.error || 'Login fehlgeschlagen'); return; }
      token = j.access_token; myName = j.name || '';
      localStorage.setItem(TKEY, token); localStorage.setItem(NKEY, myName);
      renderComposer(); load();
    } catch { alert('Login fehlgeschlagen'); }
  }

  function logout() {
    token = null; myName = null; replyTo = null;
    localStorage.removeItem(TKEY); localStorage.removeItem(NKEY);
    renderComposer(); load();
  }

  async function submit() {
    const body = textarea.value.trim(); if (!body) return;
    const res = await fetch('/api/comments', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Authorization: 'Bearer ' + token },
      body: JSON.stringify({ thread, body, parent_id: replyTo ? replyTo.id : null }),
    });
    if (res.status === 401) { logout(); alert('Sitzung abgelaufen — bitte neu anmelden.'); return; }
    const j = await res.json().catch(() => ({}));
    if (!res.ok) { alert(j.error || 'Senden fehlgeschlagen'); return; }
    textarea.value = ''; replyTo = null; renderComposer(); load();
  }

  async function remove(id) {
    if (!confirm('Wortmeldung löschen?')) return;
    const res = await fetch('/api/comments/' + id, { method: 'DELETE', headers: { Authorization: 'Bearer ' + token } });
    if (!res.ok) { const j = await res.json().catch(() => ({})); alert(j.error || 'Löschen fehlgeschlagen'); return; }
    load();
  }

  renderComposer();
  load();
})();