/**
 * Background service worker: maintains native messaging port and routes messages
 * between content scripts and the native host. Reconnects with backoff on disconnect.
 */

importScripts('origin-allowlist.js');

const HOST_NAME = 'com.bridgeswarm';
const MAX_RECONNECT_DELAY = 30000;
const INITIAL_RECONNECT_DELAY = 100;
const MAX_LOGS = 500;
const SETTINGS_KEY = 'bridgeSwarmSettings';
const DASHBOARD_PORT = 'bridgeswarm-dashboard';

const browser =
  typeof chrome !== 'undefined' && chrome.runtime?.connectNative
    ? chrome
    : typeof browser !== 'undefined'
      ? browser
      : chrome;

let port = null;
let reconnectDelay = INITIAL_RECONNECT_DELAY;
let reconnectTimer = null;
let reconnectAttempt = 0;
let lastDisconnectReason = null;
let hostSnapshot = null;
let hostSnapshotAt = 0;

const pending = new Map();
const subscribedTabs = new Set();
const tabSwarms = new Map();
const swarmRefCount = new Map();
/** swarmId -> { swarmId, appName, createdAt } */
const swarmMeta = new Map();
/** connId -> { connId, swarmId, peerKey, topics, createdAt } */
const activeConnections = new Map();

const logs = [];
let logSeq = 0;
const dashboardPorts = new Set();

let notifyOnDisconnect = false;
let debugMode = false;
let examplesServerEnabled = false;
let qvacEnabled = false;
let examplesServerPort = 4173;
let defaultFirewall = { mode: 'off', keys: [] };
let cachedSettings = {};
let capabilityOrigins = [];
let agentAlwaysApproveOrigins = [];
let agentWorkspaceRoots = [];

function examplesUrl() {
  return `http://127.0.0.1:${examplesServerPort || 4173}/`;
}

let examplesServerState = {
  running: false,
  url: null,
  error: null,
  rootFound: null,
};

const extensionState = {
  hostConnected: false,
  swarms: new Map(),
  stats: {
    totalConnections: 0,
    totalSwarms: 0,
    uptime: Date.now(),
  },
};

/**
 * Expected Hyperswarm/UDX peer churn. Must not use console.error — Chrome's
 * extension Errors page only lists console.error and makes the extension look broken.
 */
const BENIGN_CONN_RE =
  /connection reset by peer|connection timed out|stream timed out|duplicate connection|swarm has been destroyed|ECONNRESET|ETIMEDOUT|EPIPE|ENOTCONN|ECONNABORTED|socket hang up|not connected|Write after end|destroyed|HOLEPUNCH_|CANNOT_HOLEPUNCH|REMOTE_NOT_HOLEPUNCHABLE|CHANNEL_CLOSED|STREAM_NOT_CONNECTED/i;

function isBenignConnectionMessage(message) {
  return BENIGN_CONN_RE.test(String(message || ''));
}

function log(levelOrMsg, ...rest) {
  let level = 'info';
  let args;
  if (typeof levelOrMsg === 'string' && ['debug', 'info', 'warn', 'error'].includes(levelOrMsg) && rest.length) {
    level = levelOrMsg;
    args = rest;
  } else {
    args = [levelOrMsg, ...rest];
  }

  if (level === 'debug' && !debugMode) return;

  const message = args.map((a) => (typeof a === 'object' ? JSON.stringify(a) : String(a))).join(' ');

  // Downgrade expected peer disconnects so they never flood chrome://extensions errors
  if (level === 'error' && isBenignConnectionMessage(message)) {
    level = 'info';
  }

  const meta = {};
  const swarmMatch = message.match(/swarm[_-][a-zA-Z0-9]+/);
  const connMatch = message.match(/conn_[a-zA-Z0-9]+/);
  const reqMatch = message.match(/req_[a-zA-Z0-9]+/);
  const jobMatch = message.match(/(?:job|session)_[a-zA-Z0-9]+/);
  if (swarmMatch) meta.swarmId = swarmMatch[0];
  if (connMatch) meta.connId = connMatch[0];
  if (reqMatch) meta.requestId = reqMatch[0];
  if (jobMatch) meta.jobId = jobMatch[0];

  let category = 'host';
  const lower = message.toLowerCase();
  if (lower.includes('examples')) category = 'examples';
  else if (lower.includes('cap-') || lower.includes('capability') || lower.includes('media')) category = 'cap';
  else if (lower.includes('connection') || lower.includes('conn_')) category = 'conn';
  else if (lower.includes('swarm') || lower.includes('register')) category = 'swarm';
  else if (lower.includes('setting') || lower.includes('firewall')) category = 'settings';

  const entry = {
    id: `log_${Date.now()}_${++logSeq}`,
    ts: Date.now(),
    timestamp: Date.now(),
    level,
    category,
    message,
    meta,
  };
  logs.push(entry);
  if (logs.length > MAX_LOGS) logs.shift();

  if (level === 'error') console.error('[BridgeSwarm-bg]', message);
  else if (level === 'warn') console.warn('[BridgeSwarm-bg]', message);
  else console.log('[BridgeSwarm-bg]', message);

  broadcastLogs(entry);
}

function broadcastLogs(entry) {
  const msg = entry
    ? { type: 'bridge-swarm-logs', entry, logs: logs.slice() }
    : { type: 'bridge-swarm-logs', logs: logs.slice() };
  for (const p of dashboardPorts) {
    try {
      p.postMessage(msg);
    } catch (_) {
      dashboardPorts.delete(p);
    }
  }
}

function updateExtensionState() {
  extensionState.hostConnected = !!port;
  extensionState.stats.totalConnections = activeConnections.size;
  extensionState.swarms.clear();
  for (const [swarmId, count] of swarmRefCount) {
    const meta = swarmMeta.get(swarmId) || {};
    const connections = [];
    for (const conn of activeConnections.values()) {
      if (conn.swarmId === swarmId) connections.push(conn);
    }
    const snap = hostSnapshot?.swarms?.find((s) => s.swarmId === swarmId);
    extensionState.swarms.set(swarmId, {
      swarmId,
      appName: meta.appName || snap?.appName || 'bridge-swarm',
      tabCount: count,
      connections,
      createdAt: meta.createdAt || Date.now(),
      publicKey: snap?.publicKey || null,
      firewall: snap?.firewall || null,
      autoReplicate: snap?.autoReplicate || false,
      peerCount: snap?.peerCount ?? connections.length,
    });
  }
  extensionState.stats.totalSwarms = extensionState.swarms.size;
}

function clearSwarmLocal(swarmId) {
  swarmRefCount.delete(swarmId);
  swarmMeta.delete(swarmId);
  for (const [connId, conn] of [...activeConnections]) {
    if (conn.swarmId === swarmId) activeConnections.delete(connId);
  }
  for (const [tabId, swarmIds] of tabSwarms) {
    swarmIds.delete(swarmId);
    if (swarmIds.size === 0) tabSwarms.delete(tabId);
  }
  updateExtensionState();
}

function applySettingsFromStorage(s) {
  cachedSettings = s || {};
  notifyOnDisconnect = s.notifyOnDisconnect === true;
  debugMode = s.debug === true;
  examplesServerPort = typeof s.examplesServerPort === 'number' && s.examplesServerPort > 0 ? s.examplesServerPort : 4173;
  defaultFirewall = {
    mode: s.defaultFirewallMode || 'off',
    keys: Array.isArray(s.defaultFirewallKeys) ? s.defaultFirewallKeys.filter(Boolean) : [],
  };
  const allow = self.BridgeSwarmOriginAllowlist;
  capabilityOrigins = allow ? allow.allowedOrigins(s) : [];
  agentAlwaysApproveOrigins = allow ? allow.parseOriginList(s.agentAlwaysApproveOrigins) : [];
  agentWorkspaceRoots = Array.isArray(s.agentWorkspaceRoots)
    ? s.agentWorkspaceRoots.map((p) => String(p || '').trim()).filter(Boolean)
    : allow
      ? allow.parseOriginList(s.agentWorkspaceRoots).filter((x) => x && !x.startsWith('http'))
      : [];
  if (typeof s.agentWorkspaceRoots === 'string') {
    agentWorkspaceRoots = s.agentWorkspaceRoots
      .split(/\r?\n/)
      .map((l) => l.trim())
      .filter(Boolean);
  }
  syncAgentGrants().catch(() => {});

  const wantExamples = s.examplesServerEnabled === true;
  if (wantExamples !== examplesServerEnabled) {
    examplesServerEnabled = wantExamples;
    syncExamplesServer().catch((err) => log('error', 'examples server sync failed:', err.message || err));
  } else if (wantExamples && port) {
    examplesServerEnabled = wantExamples;
    syncExamplesServer().catch(() => {});
  } else {
    examplesServerEnabled = wantExamples;
  }

  const wantQvac = s.qvacEnabled === true;
  if (wantQvac !== qvacEnabled) {
    qvacEnabled = wantQvac;
    log('info', wantQvac ? 'QVAC enabled' : 'QVAC disabled');
    syncQvacEnabled().catch((err) => log('error', 'QVAC enable sync failed:', err.message || err));
  } else if (port) {
    qvacEnabled = wantQvac;
    syncQvacEnabled().catch(() => {});
  } else {
    qvacEnabled = wantQvac;
  }
}

function loadSettings() {
  browser.storage.local.get(SETTINGS_KEY, (result) => {
    applySettingsFromStorage(result[SETTINGS_KEY] || {});
  });
}

async function syncExamplesServer() {
  const url = examplesUrl();
  if (!port) {
    examplesServerState = {
      running: false,
      url: examplesServerEnabled ? url : null,
      error: examplesServerEnabled ? 'Native host not connected' : null,
      rootFound: null,
    };
    return examplesServerState;
  }
  try {
    if (examplesServerEnabled) {
      const res = await send(
        { type: 'examplesServer.start', payload: { host: '127.0.0.1', port: examplesServerPort || 4173 } },
        { quiet: !debugMode }
      );
      examplesServerState = {
        running: !!res?.running,
        url: res?.url || url,
        error: res?.ok === false ? res.error || 'Failed to start' : null,
        rootFound: res?.rootFound,
      };
      if (res?.ok !== false) log('info', 'Examples server:', examplesServerState.url);
      else log('error', 'Examples server failed:', examplesServerState.error);
    } else {
      const res = await send({ type: 'examplesServer.stop', payload: {} }, { quiet: !debugMode });
      examplesServerState = {
        running: false,
        url: null,
        error: res?.ok === false ? res.error || null : null,
        rootFound: res?.rootFound,
      };
      log('info', 'Examples server stopped');
    }
  } catch (err) {
    examplesServerState = {
      running: false,
      url: examplesServerEnabled ? url : null,
      error: err.message || String(err),
      rootFound: null,
    };
    log('error', 'Examples server error:', err.message || err);
  }
  return examplesServerState;
}

async function syncQvacEnabled() {
  if (!port) return;
  try {
    const res = await send(
      {
        type: 'capability',
        payload: {
          pack: 'qvac',
          cmd: 'setEnabled',
          payload: { enabled: qvacEnabled === true },
        },
      },
      { quiet: true }
    );
    if (res && res.ok === false) {
      log('warn', 'QVAC setEnabled:', res.error || 'failed');
    }
  } catch (err) {
    log('warn', 'QVAC setEnabled failed:', err.message || err);
  }
}

async function refreshHostSnapshot(force) {
  if (!port) {
    hostSnapshot = null;
    return null;
  }
  if (!force && hostSnapshot && Date.now() - hostSnapshotAt < 2000) return hostSnapshot;
  try {
    const snap = await send({ type: 'host.snapshot', payload: {} }, { quiet: true });
    if (snap && snap.ok !== false) {
      hostSnapshot = snap;
      hostSnapshotAt = Date.now();
      if (snap.examples) {
        examplesServerState = {
          running: !!snap.examples.running,
          url: snap.examples.url || (examplesServerEnabled ? examplesUrl() : null),
          error: snap.examples.error || null,
          rootFound: snap.examples.rootFound,
        };
      }
    }
  } catch (_) {
    /* ignore */
  }
  return hostSnapshot;
}

async function applyDefaultFirewall(swarmId) {
  if (!defaultFirewall || defaultFirewall.mode === 'off') return;
  try {
    await send(
      {
        type: 'setFirewall',
        payload: {
          swarmId,
          mode: defaultFirewall.mode,
          keys: defaultFirewall.keys || [],
        },
      },
      { quiet: !debugMode }
    );
    log('info', 'Applied default firewall', defaultFirewall.mode, 'to', swarmId);
  } catch (err) {
    log('warn', 'Failed to apply default firewall:', err.message || err);
  }
}

function senderPageOrigin(sender) {
  const allow = self.BridgeSwarmOriginAllowlist;
  if (!allow) return '';
  const url = (sender && sender.url) || (sender && sender.tab && sender.tab.url) || '';
  if (sender && sender.origin && (sender.origin.startsWith('http') || sender.origin.startsWith('chrome-extension') || sender.origin.startsWith('moz-extension'))) {
    return allow.normalizeOrigin(sender.origin);
  }
  return allow.originFromUrl(url);
}

function extensionOrigin() {
  try {
    return new URL(browser.runtime.getURL('')).origin;
  } catch (_) {
    return '';
  }
}

/**
 * Deny pack commands from origins not on the capability allowlist.
 * Attaches _origin / _alwaysApprove onto the inner payload for the host.
 * Returns an error response object, or null if the message may proceed.
 */
function gateCapabilityPayload(msg, sender) {
  const allow = self.BridgeSwarmOriginAllowlist;
  if (!allow || !msg || !allow.isCapabilityType(msg.type)) return null;
  const origin = senderPageOrigin(sender);
  const extOrigin = extensionOrigin();
  if (!allow.isOriginAllowed(origin, cachedSettings, { extensionOrigin: extOrigin })) {
    log('warn', 'Blocked capability from origin', origin || '(unknown)', msg.type);
    return { ok: false, error: 'origin not allowed for capabilities: ' + (origin || 'unknown') };
  }
  if (allow.isQvacDisabled(msg, cachedSettings)) {
    log('warn', 'Blocked QVAC/agent (disabled)', msg.type);
    return { ok: false, error: 'QVAC is disabled. Enable it in BridgeSwarm Settings.' };
  }
  const inner = msg.payload && typeof msg.payload === 'object' ? msg.payload : {};
  const always = allow.isAlwaysApproveOrigin(origin, cachedSettings);
  if (msg.type === 'capability') {
    const nested = inner.payload && typeof inner.payload === 'object' ? inner.payload : {};
    nested._origin = origin;
    nested._alwaysApprove = always;
    inner.payload = nested;
    inner._origin = origin;
    msg.payload = inner;
  } else {
    inner._origin = origin;
    inner._alwaysApprove = always;
    msg.payload = inner;
  }
  return null;
}

async function syncAgentGrants() {
  if (!port) return;
  try {
    await send(
      {
        type: 'capability',
        payload: {
          pack: 'agent',
          cmd: 'setGrants',
          payload: {
            roots: agentWorkspaceRoots,
            alwaysApproveOrigins: agentAlwaysApproveOrigins,
            _origin: extensionOrigin(),
            _alwaysApprove: true,
          },
        },
      },
      { quiet: true }
    );
  } catch (_) {
    /* agent pack may not be registered yet */
  }
}

browser.storage.onChanged.addListener((changes, areaName) => {
  if (areaName === 'local' && changes[SETTINGS_KEY]) {
    applySettingsFromStorage(changes[SETTINGS_KEY].newValue || {});
  }
});

function connect() {
  try {
    port = browser.runtime.connectNative(HOST_NAME);
    log('info', 'Connected to native host');
    reconnectAttempt = 0;
    lastDisconnectReason = null;
  } catch (e) {
    log('error', 'connectNative failed:', e.message || e);
    scheduleReconnect();
    return;
  }

  reconnectDelay = INITIAL_RECONNECT_DELAY;
  if (examplesServerEnabled) {
    syncExamplesServer().catch(() => {});
  }
  syncQvacEnabled().catch(() => {});
  syncAgentGrants().catch(() => {});
  refreshHostSnapshot(true).catch(() => {});

  port.onMessage.addListener((msg) => {
    if (debugMode) log('debug', 'Received from native:', msg.type, msg.event || '');

    if (msg.type === 'event') {
      const payload = msg.payload || {};
      if (msg.event === 'connection') {
        const connId = payload.connId;
        const swarmId = payload.swarmId;
        const peerInfo = payload.peerInfo || {};
        log('info', 'Connection established:', connId, 'peer:', (peerInfo.publicKey || '').slice(0, 8));
        activeConnections.set(connId, {
          connId,
          swarmId,
          peerKey: peerInfo.publicKey || '',
          topics: peerInfo.topics || [],
          createdAt: Date.now(),
        });
        updateExtensionState();
        broadcastState();
      } else if (msg.event === 'error') {
        const connId = payload.connId;
        const errMsg = payload.message || 'Unknown error';
        // Host only emits error for non-transient failures; still guard Chrome error spam
        if (isBenignConnectionMessage(errMsg)) {
          log('info', 'Connection closed:', connId, errMsg);
        } else {
          log('error', 'Connection ERROR:', connId, errMsg);
        }
        activeConnections.delete(connId);
        updateExtensionState();
        broadcastState();
      } else if (msg.event === 'end') {
        const reason = payload.reason ? ` (${payload.reason})` : '';
        log('info', 'Connection ended:', payload.connId + reason);
        activeConnections.delete(payload.connId);
        updateExtensionState();
        broadcastState();
      } else if (msg.event === 'cap-error') {
        log('error', 'Capability error:', payload.pack, payload.message || '');
      } else if (msg.event === 'cap-end') {
        if (debugMode) log('debug', 'Capability end:', payload.pack, payload.jobId || payload.sessionId || '');
      }
    }

    if (msg.type === 'response' && msg.id != null) {
      const p = pending.get(msg.id);
      if (p) {
        pending.delete(msg.id);
        if (msg.payload && msg.payload.error) {
          p.reject(new Error(msg.payload.error));
        } else {
          p.resolve(msg.payload);
        }
      }
      return;
    }

    if (msg.type === 'event') {
      const eventSwarmId = msg.payload?.swarmId;
      const isCapEvent =
        msg.event === 'cap-chunk' ||
        msg.event === 'cap-end' ||
        msg.event === 'cap-error' ||
        !!msg.payload?.pack;
      if (debugMode) {
        log('debug', 'Broadcasting event to tabs:', msg.event, 'connId:', msg.payload?.connId, 'swarmId:', eventSwarmId);
      }
      if (isCapEvent || eventSwarmId == null) {
        for (const tabId of subscribedTabs) {
          browser.tabs.sendMessage(tabId, { type: 'bridge-swarm-event', payload: msg }).catch(() => {});
        }
      } else {
        for (const [tabId, swarmIds] of tabSwarms) {
          if (swarmIds.has(eventSwarmId)) {
            browser.tabs.sendMessage(tabId, { type: 'bridge-swarm-event', payload: msg }).catch(() => {});
          }
        }
      }
    }
  });

  port.onDisconnect.addListener((p) => {
    const reason = p?.error?.message || browser.runtime.lastError?.message || null;
    lastDisconnectReason = reason || 'Native host disconnected';
    if (reason) log('warn', 'onDisconnect reason:', reason);
    else log('warn', 'Native host disconnected');
    extensionState.hostConnected = false;
    activeConnections.clear();
    hostSnapshot = null;
    updateExtensionState();
    port = null;
    examplesServerState = {
      running: false,
      url: examplesServerEnabled ? examplesUrl() : null,
      error: examplesServerEnabled ? 'Native host disconnected' : null,
      rootFound: examplesServerState.rootFound,
    };
    broadcastState();
    if (notifyOnDisconnect && browser.notifications) {
      browser.notifications
        .create('bridgeswarm-host-disconnect', {
          type: 'basic',
          title: 'BridgeSwarm',
          message: 'Native host disconnected.',
          iconUrl: browser.runtime.getURL('icons/48.png'),
        })
        .catch(() => {});
    }
    const err = new Error(reason || 'Native host disconnected');
    for (const [, pendingReq] of pending) {
      pendingReq.reject(err);
    }
    pending.clear();
    for (const tabId of subscribedTabs) {
      browser.tabs.sendMessage(tabId, { type: 'bridge-swarm-host-disconnect' }).catch(() => {});
    }
    scheduleReconnect();
  });
}

function scheduleReconnect() {
  if (reconnectTimer) return;
  reconnectAttempt += 1;
  const delay = reconnectDelay;
  reconnectTimer = setTimeout(() => {
    reconnectTimer = null;
    connect();
    reconnectDelay = Math.min(reconnectDelay * 2, MAX_RECONNECT_DELAY);
  }, delay);
  broadcastState();
}

function send(msg, opts = {}) {
  if (!opts.quiet && debugMode) {
    log('debug', 'Sending to native:', msg.type, msg.payload?.swarmId || '', msg.payload?.connId || '');
  } else if (!opts.quiet && !debugMode && !['host.snapshot', 'examplesServer.status'].includes(msg.type)) {
    /* skip chatty */
  }
  return new Promise((resolve, reject) => {
    if (!port) {
      reject(new Error('Native host not connected'));
      return;
    }
    const id = msg.id || `req_${Date.now()}_${Math.random().toString(36).slice(2)}`;
    msg.id = id;
    pending.set(id, { resolve, reject });
    try {
      port.postMessage(msg);
    } catch (e) {
      pending.delete(id);
      reject(e);
    }
  });
}

function buildStatePayload() {
  updateExtensionState();
  const tabsInfo = [];
  for (const [tabId, swarmIds] of tabSwarms) {
    tabsInfo.push({ tabId, swarmIds: Array.from(swarmIds) });
  }
  const manifest = browser.runtime.getManifest?.() || {};
  return {
    hostConnected: extensionState.hostConnected,
    swarms: Array.from(extensionState.swarms.values()),
    tabs: tabsInfo,
    stats: {
      totalConnections: extensionState.stats.totalConnections,
      totalSwarms: extensionState.stats.totalSwarms,
      uptime: extensionState.stats.uptime,
      pendingRequests: pending.size,
      reconnectAttempt,
      reconnectDelayMs: port ? 0 : reconnectDelay,
    },
    health: {
      lastDisconnectReason,
      reconnectAttempt,
      reconnectDelayMs: port ? 0 : reconnectDelay,
      extensionVersion: manifest.version || '1.0.0',
      hostVersion: hostSnapshot?.version || null,
      storagePath: hostSnapshot?.storagePath || null,
      packs: hostSnapshot?.packs || [],
      qvac: hostSnapshot?.qvac || null,
      agent: hostSnapshot?.agent || null,
      openai: hostSnapshot?.openai || null,
    },
    examples: {
      enabled: examplesServerEnabled,
      ...examplesServerState,
      url: examplesServerState.url || (examplesServerEnabled ? examplesUrl() : null),
      port: examplesServerPort,
    },
    hostSnapshot,
  };
}

function broadcastState() {
  const base = buildStatePayload();
  enrichTabs(base.tabs)
    .then((tabs) => {
      const state = { ...base, tabs };
      for (const p of dashboardPorts) {
        try {
          p.postMessage({ type: 'bridge-swarm-state', state });
        } catch (_) {
          dashboardPorts.delete(p);
        }
      }
    })
    .catch(() => {
      for (const p of dashboardPorts) {
        try {
          p.postMessage({ type: 'bridge-swarm-state', state: base });
        } catch (_) {
          dashboardPorts.delete(p);
        }
      }
    });
}

async function enrichTabs(tabsInfo) {
  const enriched = [];
  for (const t of tabsInfo) {
    let title = null;
    let url = null;
    try {
      const tab = await browser.tabs.get(t.tabId);
      title = tab?.title || null;
      url = tab?.url || null;
    } catch (_) {}
    enriched.push({ ...t, title, url });
  }
  return enriched;
}

loadSettings();
connect();

browser.tabs.onRemoved.addListener((tabId) => {
  log('info', 'Tab closed:', tabId);
  const swarmIds = tabSwarms.get(tabId);
  if (swarmIds) {
    for (const swarmId of swarmIds) {
      const count = (swarmRefCount.get(swarmId) || 1) - 1;
      swarmRefCount.set(swarmId, count);
      log('debug', 'Swarm', swarmId, 'refcount now:', count);
      if (count <= 0) {
        log('info', 'Last tab for swarm', swarmId, '- destroying');
        send({ type: 'destroy', payload: { swarmId } }).catch(() => {});
        clearSwarmLocal(swarmId);
      }
    }
    tabSwarms.delete(tabId);
  }
  subscribedTabs.delete(tabId);
  broadcastState();
});

browser.runtime.onConnect.addListener((p) => {
  if (p.name !== DASHBOARD_PORT) return;
  dashboardPorts.add(p);
  log('info', 'Dashboard port connected');
  p.postMessage({ type: 'bridge-swarm-logs', logs: logs.slice() });
  p.postMessage({ type: 'bridge-swarm-state', state: buildStatePayload() });
  p.onDisconnect.addListener(() => {
    dashboardPorts.delete(p);
  });
  p.onMessage.addListener((msg) => {
    if (!msg || msg.target !== 'bridge-swarm-native') return;
    handleDashboardMessage(msg, (response) => {
      try {
        p.postMessage({ type: 'bridge-swarm-response', id: msg.id, response });
      } catch (_) {}
    });
  });
});

function handleDashboardMessage(message, sendResponse) {
  if (message.action === 'getLogs') {
    sendResponse({ ok: true, logs: logs.slice() });
    return false;
  }
  if (message.action === 'clearLogs') {
    logs.length = 0;
    broadcastLogs();
    sendResponse({ ok: true, logs: [] });
    return false;
  }
  if (message.action === 'getState') {
    refreshHostSnapshot(false)
      .then(() => enrichTabs(buildStatePayload().tabs))
      .then((tabs) => {
        const state = buildStatePayload();
        state.tabs = tabs;
        sendResponse({ ok: true, state });
      })
      .catch(() => sendResponse({ ok: true, state: buildStatePayload() }));
    return true;
  }
  if (message.action === 'destroySwarm' && message.payload?.swarmId) {
    const swarmId = message.payload.swarmId;
    send({ type: 'destroy', payload: { swarmId } })
      .then((res) => {
        clearSwarmLocal(swarmId);
        broadcastState();
        sendResponse(res && res.ok === false ? res : { ok: true });
      })
      .catch((err) => sendResponse({ ok: false, error: err.message }));
    return true;
  }
  if (message.action === 'examplesServerStatus') {
    syncExamplesServer()
      .then((state) =>
        sendResponse({
          ok: !state.error,
          enabled: examplesServerEnabled,
          ...state,
          url: state.url || (examplesServerEnabled ? examplesUrl() : null),
          port: examplesServerPort,
        })
      )
      .catch((err) =>
        sendResponse({
          ok: false,
          enabled: examplesServerEnabled,
          running: false,
          url: examplesServerEnabled ? examplesUrl() : null,
          error: err.message,
          port: examplesServerPort,
        })
      );
    return true;
  }
  if (message.action === 'focusTab' && message.payload?.tabId != null) {
    browser.tabs
      .update(message.payload.tabId, { active: true })
      .then(() => sendResponse({ ok: true }))
      .catch((err) => sendResponse({ ok: false, error: err.message }));
    return true;
  }
  return false;
}

browser.runtime.onMessage.addListener((message, sender, sendResponse) => {
  if (message.target !== 'bridge-swarm-native') {
    return;
  }

  if (message.action === 'send' && message.payload?.type === 'registerSwarm') {
    const swarmId = message.payload?.payload?.swarmId;
    const appName = message.payload?.payload?.appName || 'bridge-swarm';
    if (swarmId && sender.tab?.id != null) {
      if (!tabSwarms.has(sender.tab.id)) {
        tabSwarms.set(sender.tab.id, new Set());
      }
      const set = tabSwarms.get(sender.tab.id);
      const already = set.has(swarmId);
      set.add(swarmId);
      if (!already) {
        const count = swarmRefCount.get(swarmId) || 0;
        swarmRefCount.set(swarmId, count + 1);
      }
      if (!swarmMeta.has(swarmId)) {
        swarmMeta.set(swarmId, { swarmId, appName, createdAt: Date.now() });
      } else if (appName) {
        swarmMeta.get(swarmId).appName = appName;
      }
      log('info', 'Registered swarm', swarmId, 'appName=', appName, 'for tab', sender.tab.id);
      applyDefaultFirewall(swarmId).catch(() => {});
      updateExtensionState();
      broadcastState();
    }
    sendResponse({ ok: true });
    return false;
  }

  if (message.action === 'send') {
    const payload = message.payload;
    const capGate = gateCapabilityPayload(payload, sender);
    if (capGate) {
      sendResponse(capGate);
      return false;
    }
    send(payload)
      .then((res) => {
        if (payload?.type === 'init' && payload?.payload?.swarmId) {
          const swarmId = payload.payload.swarmId;
          const appName = payload.payload?.options?.appName;
          if (!swarmMeta.has(swarmId)) {
            swarmMeta.set(swarmId, {
              swarmId,
              appName: appName || 'bridge-swarm',
              createdAt: Date.now(),
            });
          }
          applyDefaultFirewall(swarmId).catch(() => {});
        }
        sendResponse(res);
      })
      .catch((err) => sendResponse({ error: err.message }));
    return true;
  }

  if (message.action === 'subscribe' && sender.tab && sender.tab.id != null) {
    subscribedTabs.add(sender.tab.id);
    sendResponse({ ok: true });
    return false;
  }
  if (message.action === 'unsubscribe' && sender.tab && sender.tab.id != null) {
    subscribedTabs.delete(sender.tab.id);
    sendResponse({ ok: true });
    return false;
  }

  // Legacy dashboard registration (prefer Port)
  if (message.action === 'registerDashboard') {
    sendResponse({ ok: true, logs: logs.slice() });
    return false;
  }
  if (message.action === 'unregisterDashboard') {
    sendResponse({ ok: true });
    return false;
  }

  const handled = handleDashboardMessage(message, sendResponse);
  if (handled === true) return true;
  if (message.action === 'getLogs' || message.action === 'clearLogs' || message.action === 'getState' || message.action === 'destroySwarm' || message.action === 'examplesServerStatus' || message.action === 'focusTab') {
    return handled;
  }
});

browser.action?.onClicked?.addListener(() => {
  browser.tabs.create({ url: 'dashboard.html' });
});