/**
 * Orchestrates a full dashboard state refresh cycle.
 * Fetches state from the background service worker, dispatches it to all page
 * renderers, pings latency badges, and merges settings defaults.
 */
// Orchestrates a full state refresh cycle.
// Depends on: core/messaging.js (fetchState), core/state.js (settings, SETTINGS_DEFAULTS, currentState),
//             pages/ssh.js (sshConnections, renderSshGrid),
//             pages/rdp.js (rdpConnections, renderRdpGrid),
//             pages/overview.js (updateDashboard),
//             pages/virtual-hosts.js (updateConnectionsTable),
//             pages/servers.js (updateSwarmsTable),
//             pages/proxy-ca.js (updateTabsTable),
//             pages/service-tunnels.js (updateServiceTunnelsTable),
//             pages/settings.js (updateSettingsUI),
//             pages/backups.js (refreshBackups)

const _pingInFlight = new Set();

/**
 * Ping all latency badges visible in the DOM.
 * Updates badge text/color in-place with a CSS transition so the table never
 * reflows. Skips badges that already have an in-flight request for the same
 * host:port key. Respects the `latencyPingEnabled` and `latencyPingIntervalMs`
 * settings — callers should check `latencyPingEnabled` before calling this.
 */
function _pingLatencyBadges() {
  if (settings.latencyPingEnabled === false) return;
  const badges = document.querySelectorAll('.latency-badge[data-ping-port]');
  badges.forEach(badge => {
    const port = parseInt(badge.dataset.pingPort, 10);
    const host = badge.dataset.pingHost || '127.0.0.1';
    if (!port) return;
    const key = host + ':' + port;
    if (_pingInFlight.has(key)) return;
    _pingInFlight.add(key);
    // Dim badge while request is in-flight — avoids a hard jump on update
    badge.classList.add('pinging');
    chrome.runtime.sendMessage(
      { target: 'holesail-native', action: 'send', payload: { type: 'pingTunnel', payload: { host, port } } },
      (response) => {
        _pingInFlight.delete(key);
        void chrome.runtime.lastError;
        if (!badge.isConnected) return;
        badge.classList.remove('pinging');
        if (response && response.ok) {
          const ms = response.latencyMs;
          const color = ms < 50 ? 'var(--green)' : ms < 200 ? 'var(--amber)' : 'var(--red)';
          // Only update if the value actually changed to avoid unnecessary repaints
          const next = ms + 'ms';
          if (badge.textContent !== next) badge.textContent = next;
          badge.style.color = color;
        } else {
          if (badge.textContent !== '—') badge.textContent = '—';
          badge.style.color = 'var(--text4)';
        }
      }
    );
  });
}

/**
 * Fetch the latest extension state and update all dashboard page renderers.
 * Also pings latency badges and syncs settings defaults.
 * Called on a 2-second interval by `init.js`.
 * @returns {Promise<object|null>} The fetched state, or null.
 */
async function refresh() {
  const state = await fetchState();
  if (state) {
    // Sync SSH connections from native host state — decode base64 password if present
    if (Array.isArray(state.sshConnections)) {
      sshConnections = state.sshConnections.map(c => {
        const existing = sshConnections.find(e => e.id === c.id);
        let password = (existing && existing.password) || '';
        if (!password && c.passwordB64) {
          try { password = decodeURIComponent(escape(atob(c.passwordB64))); } catch (_) {}
        }
        return { ...c, password };
      });
      renderSshGrid();
    }
    // Sync RDP connections from native host state — decode base64 password if present
    if (Array.isArray(state.rdpConnections)) {
      rdpConnections = state.rdpConnections.map(c => {
        const existing = rdpConnections.find(e => e.id === c.id);
        let password = (existing && existing.password) || '';
        if (!password && c.passwordB64) {
          try { password = decodeURIComponent(escape(atob(c.passwordB64))); } catch (_) {}
        }
        return { ...c, password };
      });
      renderRdpGrid();
    }
    // Sync settings from native host state
    if (state.settings && typeof state.settings === 'object') {
      settings = { ...SETTINGS_DEFAULTS, ...state.settings };
    }
    updateDashboard(state);
    updateConnectionsTable(state);
    updateSwarmsTable(state);
    updateTabsTable(state);
    updateServiceTunnelsTable(state);
    updateSettingsUI();
  }
  const sshCountEl = $('sshCount');
  if (sshCountEl) sshCountEl.textContent = sshConnections.length;
  refreshBackups();
  if (typeof updateSyncStatus === 'function') updateSyncStatus();
  return state ?? null;
}