const btn = document.getElementById('record-btn');
const statusText = document.getElementById('status-text');
const headerStatus = document.getElementById('header-status');
const instructionsEl = document.getElementById('instructions');
const transcriptList = document.getElementById('transcript-list');
const userChip = document.getElementById('user-chip');
const logoutBtn = document.getElementById('logout-btn');
const modal = document.getElementById('modal');
const modalTitle = document.getElementById('modal-title');
const modalBody = document.getElementById('modal-body');
const modalOpenBtn = document.getElementById('modal-open-btn');
const modalCloseBtn = document.getElementById('modal-close-btn');
let _modalPath = null;
let _modalFilename = null;

const STATUS_LABELS = {
  idle: 'Bereit',
  recording: 'Aufnahme läuft\u2026',
  processing: 'Wird verarbeitet\u2026',
  error: 'Fehler',
};

// Auth token is stored in sessionStorage so it's gone when the tab closes.
// On first load, if no token is present the server will redirect to /login.
const token = sessionStorage.getItem('token');

function authHeaders() {
  return token ? { 'Authorization': `Bearer ${token}` } : {};
}

function apiFetch(url, options = {}) {
  return fetch(url, {
    ...options,
    headers: { 'Content-Type': 'application/json', ...authHeaders(), ...(options.headers || {}) },
  });
}

logoutBtn.addEventListener('click', () => {
  apiFetch('/logout', { method: 'POST' }).finally(() => {
    sessionStorage.removeItem('token');
    location.href = '/login';
  });
});

function openModal(filename, path) {
  _modalPath = path;
  _modalFilename = filename;
  modalTitle.textContent = filename.replace(/\.md$/, '').replace(/^\d{4}-\d{2}-\d{2}-\d{4}-/, '');
  modalBody.innerHTML = '';
  modal.classList.remove('hidden');
  apiFetch(`/transcripts/${encodeURIComponent(filename)}`)
    .then(r => r.text())
    .then(md => {
      modalBody.innerHTML = DOMPurify.sanitize(marked.parse(md));
    });
}

function closeModal() {
  modal.classList.add('hidden');
  _modalPath = null;
  _modalFilename = null;
}

modalCloseBtn.addEventListener('click', closeModal);
modal.querySelector('.modal-backdrop').addEventListener('click', closeModal);
document.addEventListener('keydown', e => { if (e.key === 'Escape') closeModal(); });
modalOpenBtn.addEventListener('click', () => {
  if (_modalPath) apiFetch('/open', { method: 'POST', body: JSON.stringify({ path: _modalPath }) });
});

instructionsEl.addEventListener('input', async () => {
  await apiFetch('/instructions', {
    method: 'POST',
    body: JSON.stringify({ instructions: instructionsEl.value }),
  });
});

function setStatus(status) {
  btn.className = status;
  headerStatus.className = `status-badge ${status}`;
  const label = STATUS_LABELS[status] || status;
  statusText.textContent = status === 'error' ? label + ' — klicken zum Zurücksetzen' : label;
  headerStatus.textContent = label;
  btn.disabled = status === 'processing';
}

btn.addEventListener('click', async () => {
  const r = await apiFetch('/toggle', { method: 'POST' });
  const data = await r.json();
  if (data.action === 'started') {
    setStatus('recording');
  } else if (data.action === 'reset') {
    setStatus('idle');
  }
});

function connectWs() {
  const proto = location.protocol === 'https:' ? 'wss:' : 'ws:';
  const ws = new WebSocket(`${proto}//${location.host}/ws?token=${encodeURIComponent(token || '')}`);
  ws.onmessage = (e) => {
    const msg = JSON.parse(e.data);
    if (msg.event === 'processing') setStatus('processing');
    if (msg.event === 'saved') {
      setStatus('idle');
      loadTranscripts();
    }
    if (msg.event === 'error') {
      setStatus('error');
    }
  };
  ws.onclose = () => setTimeout(connectWs, 2000);
}

async function loadTranscripts() {
  const r = await apiFetch('/transcripts');
  if (!r.ok) return;
  const items = await r.json();

  transcriptList.replaceChildren(
    ...items.map((t) => {
      const div = document.createElement('div');
      div.className = 'transcript-item';

      const name = document.createElement('span');
      name.className = 'name';
      name.textContent = t.filename.replace(/\.md$/, '').replace(/^\d{4}-\d{2}-\d{2}-\d{4}-/, '');

      const meta = document.createElement('span');
      meta.className = 'meta';
      meta.textContent = `${Math.round(t.size / 1024 * 10) / 10} KB`;

      div.addEventListener('click', () => openModal(t.filename, t.path));

      const reprocessBtn = document.createElement('button');
      reprocessBtn.className = 'del-btn';
      reprocessBtn.title = 'Neu verarbeiten';
      reprocessBtn.innerHTML = '<svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor"><path d="M17.65 6.35A7.96 7.96 0 0 0 12 4a8 8 0 1 0 8 8h-2a6 6 0 1 1-1.76-4.24l-2.24 2.24H20V4l-2.35 2.35z"/></svg>';
      reprocessBtn.addEventListener('click', async (e) => {
        e.stopPropagation();
        reprocessBtn.disabled = true;
        await apiFetch(`/transcripts/${encodeURIComponent(t.filename)}/reprocess`, {
          method: 'POST',
          body: JSON.stringify({ instructions: instructionsEl.value }),
        });
        reprocessBtn.disabled = false;
        loadTranscripts();
      });

      const delBtn = document.createElement('button');
      delBtn.className = 'del-btn';
      delBtn.title = 'Löschen';
      delBtn.innerHTML = '<svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor"><path d="M9 3h6l1 1h4v2H4V4h4l1-1zm-3 5h12l-1 13H7L6 8zm5 2v9h2v-9h-2zm-3 0v9h2v-9H8zm8 0v9h2v-9h-2z"/></svg>';
      delBtn.addEventListener('click', async (e) => {
        e.stopPropagation();
        await apiFetch(`/transcripts/${encodeURIComponent(t.filename)}`, { method: 'DELETE' });
        loadTranscripts();
      });

      const actions = document.createElement('div');
      actions.className = 'item-actions';
      actions.append(reprocessBtn, delBtn);
      div.append(name, meta, actions);
      return div;
    })
  );
}

(async () => {
  const r = await apiFetch('/status');
  if (r.status === 401) {
    location.href = '/login';
    return;
  }
  const data = await r.json();
  setStatus(data.status);
  if (data.username) {
    userChip.textContent = data.username;
  }
  connectWs();
  loadTranscripts();
})();