// Verstak Bridge — Popup Script
// Shows connection status, queue count, recent events, and settings.

const STORAGE_KEY = 'verstak_queue';
const BRIDGE_KEY = 'verstak_bridge_config';
const RECENT_KEY = 'verstak_recent';
const DEFAULT_PORT = 9786;

document.addEventListener('DOMContentLoaded', () => {
  updateUI();
  restoreToggleState();
  restoreSettingsPanel();

  document.getElementById('sync-btn').addEventListener('click', forceSync);
  document.getElementById('track-toggle').addEventListener('change', onToggle);
  document.getElementById('settings-btn').addEventListener('click', toggleSettings);
  document.getElementById('save-port-btn').addEventListener('click', savePort);
  document.getElementById('test-port-btn').addEventListener('click', testPort);
});

function updateUI() {
  chrome.storage.local.get([STORAGE_KEY, BRIDGE_KEY, RECENT_KEY], (data) => {
    const queue = data[STORAGE_KEY] || [];
    const config = data[BRIDGE_KEY] || {};
    const recent = data[RECENT_KEY] || [];

    // Queue count
    document.getElementById('queue-count').textContent = queue.length;

    // Bridge status
    const statusEl = document.getElementById('bridge-status');
    const portEl = document.getElementById('bridge-port');
    const dotEl = document.getElementById('status-dot');

    if (config.bridgeReachable) {
      statusEl.textContent = 'Доступен';
      statusEl.className = 'value online';
      dotEl.className = 'dot online';
      portEl.textContent = '127.0.0.1:' + (config.port || DEFAULT_PORT);
    } else {
      statusEl.textContent = 'Недоступен';
      statusEl.className = 'value offline';
      dotEl.className = 'dot offline';
      portEl.textContent = config.lastPing ? '—' : 'проверка...';
    }

    // Update settings panel port field
    const portInput = document.getElementById('port-input');
    if (portInput && !portInput.dataset.userEdited) {
      portInput.value = config.port || DEFAULT_PORT;
    }

    // Recent events
    renderRecent(recent, config.bridgeReachable);
  });
}

function renderRecent(events, reachable) {
  const list = document.getElementById('event-list');
  list.innerHTML = '';

  if (!events || events.length === 0) {
    list.innerHTML = '<p class="empty">Нет событий</p>';
    return;
  }

  const lastFive = events.slice(-5).reverse();
  for (const ev of lastFive) {
    const item = document.createElement('div');
    item.className = 'event-item';
    item.innerHTML = `
      <div class="domain">${escapeHtml(ev.domain || '?')}</div>
      <div class="title">${escapeHtml(truncate(ev.title || ev.url, 60))}</div>
      <div class="duration">${ev.active_seconds || 0}с${reachable ? '' : ' (ожидает)'}</div>
    `;
    list.appendChild(item);
  }
}

function forceSync() {
  const btn = document.getElementById('sync-btn');
  btn.disabled = true;
  btn.textContent = '⏳ Отправка...';

  chrome.runtime.sendMessage({ type: 'FORCE_FLUSH' }, () => {
    setTimeout(() => {
      updateUI();
      btn.disabled = false;
      btn.textContent = '🔄 Отправить сейчас';
    }, 1000);
  });
}

function onToggle(e) {
  const enabled = e.target.checked;
  chrome.storage.local.set({ 'verstak_tracking_enabled': enabled });
  chrome.runtime.sendMessage({ type: 'SET_TRACKING', enabled });
}

function restoreToggleState() {
  chrome.storage.local.get('verstak_tracking_enabled', (data) => {
    const enabled = data.verstak_tracking_enabled !== false;
    document.getElementById('track-toggle').checked = enabled;
  });
}

// --- Settings panel ---

function toggleSettings() {
  const panel = document.getElementById('settings-panel');
  const main = document.getElementById('main-panel');
  const btn = document.getElementById('settings-btn');

  if (panel.style.display === 'none' || !panel.style.display) {
    panel.style.display = 'block';
    main.style.display = 'none';
    btn.textContent = '← Назад';
  } else {
    panel.style.display = 'none';
    main.style.display = 'block';
    btn.textContent = '⚙';
  }
}

function restoreSettingsPanel() {
  chrome.storage.local.get(BRIDGE_KEY, (data) => {
    const config = data[BRIDGE_KEY] || {};
    const portInput = document.getElementById('port-input');
    if (portInput) {
      portInput.value = config.port || DEFAULT_PORT;
    }
  });
}

function savePort() {
  const portInput = document.getElementById('port-input');
  const port = parseInt(portInput.value, 10);
  const statusEl = document.getElementById('port-status');

  if (isNaN(port) || port < 1024 || port > 65535) {
    statusEl.textContent = 'Порт: 1024–65535';
    statusEl.className = 'port-status error';
    return;
  }

  chrome.storage.local.get(BRIDGE_KEY, (data) => {
    const config = data[BRIDGE_KEY] || {};
    config.port = port;
    chrome.storage.local.set({ [BRIDGE_KEY]: config }, () => {
      statusEl.textContent = 'Сохранено';
      statusEl.className = 'port-status ok';
      // Trigger immediate ping with new port
      chrome.runtime.sendMessage({ type: 'FORCE_FLUSH' });
      setTimeout(() => { updateUI(); statusEl.textContent = ''; }, 1500);
    });
  });
}

function testPort() {
  const portInput = document.getElementById('port-input');
  const port = parseInt(portInput.value, 10);
  const statusEl = document.getElementById('port-status');

  if (isNaN(port) || port < 1024 || port > 65535) {
    statusEl.textContent = 'Порт: 1024–65535';
    statusEl.className = 'port-status error';
    return;
  }

  statusEl.textContent = 'Проверка...';
  statusEl.className = 'port-status';

  fetch(`http://127.0.0.1:${port}/api/ping`, { signal: AbortSignal.timeout(3000) })
    .then((res) => {
      if (res.ok) {
        statusEl.textContent = '✓ Сервер отвечает';
        statusEl.className = 'port-status ok';
      } else {
        statusEl.textContent = `✗ Ошибка ${res.status}`;
        statusEl.className = 'port-status error';
      }
    })
    .catch((err) => {
      if (err.name === 'TimeoutError' || err.name === 'AbortError') {
        statusEl.textContent = '✗ Нет ответа (таймаут). Возможно, порт занят другим приложением или Verstak не запущен';
      } else {
        statusEl.textContent = '✗ Сервер недоступен';
      }
      statusEl.className = 'port-status error';
    });
}

// Listen for updates from background
chrome.runtime.onMessage.addListener((msg) => {
  if (msg.type === 'UI_UPDATE') {
    updateUI();
  }
});

// --- Helpers ---

function truncate(s, n) {
  if (!s) return '';
  return s.length > n ? s.substring(0, n) + '...' : s;
}

function escapeHtml(s) {
  if (!s) return '';
  return s
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;');
}