const els = {
  adminStatus: document.querySelector('#adminStatus'),
  credentialsSource: document.querySelector('#credentialsSource'),
  tokenStatus: document.querySelector('#tokenStatus'),
  steamStatus: document.querySelector('#steamStatus'),
  gcStatus: document.querySelector('#gcStatus'),
  loginPanel: document.querySelector('#loginPanel'),
  notificationPanel: document.querySelector('#notificationPanel'),
  telegramPanel: document.querySelector('#telegramPanel'),
  lobbyPanel: document.querySelector('#lobbyPanel'),
  credentialsPanel: document.querySelector('#credentialsPanel'),
  guardPanel: document.querySelector('#guardPanel'),
  tokenPanel: document.querySelector('#tokenPanel'),
  adminPassword: document.querySelector('#adminPassword'),
  unlockBtn: document.querySelector('#unlockBtn'),
  adminError: document.querySelector('#adminError'),
  adminMessage: document.querySelector('#adminMessage'),
  steamAccount: document.querySelector('#steamAccount'),
  steamPassword: document.querySelector('#steamPassword'),
  clearToken: document.querySelector('#clearToken'),
  reloadBtn: document.querySelector('#reloadBtn'),
  saveBtn: document.querySelector('#saveBtn'),
  steamGuardCode: document.querySelector('#steamGuardCode'),
  submitGuardBtn: document.querySelector('#submitGuardBtn'),
  guardHint: document.querySelector('#guardHint'),
  tokenSteamId: document.querySelector('#tokenSteamId'),
  tokenAccount: document.querySelector('#tokenAccount'),
  tokenUpdated: document.querySelector('#tokenUpdated'),
  tokenExpires: document.querySelector('#tokenExpires'),
  clearTokenBtn: document.querySelector('#clearTokenBtn'),
  enableNotificationsBtn: document.querySelector('#enableNotificationsBtn'),
  disableNotificationsBtn: document.querySelector('#disableNotificationsBtn'),
  testNotificationBtn: document.querySelector('#testNotificationBtn'),
  notificationStatus: document.querySelector('#notificationStatus'),
  telegramToken: document.querySelector('#telegramToken'),
  telegramRecipientIds: document.querySelector('#telegramRecipientIds'),
  saveTelegramBtn: document.querySelector('#saveTelegramBtn'),
  testTelegramBtn: document.querySelector('#testTelegramBtn'),
  disableTelegramBtn: document.querySelector('#disableTelegramBtn'),
  telegramStatus: document.querySelector('#telegramStatus'),
  savedSteamAccount: document.querySelector('#savedSteamAccount'),
  activateAccountBtn: document.querySelector('#activateAccountBtn'),
  lobbyName: document.querySelector('#lobbyName'),
  lobbyRegion: document.querySelector('#lobbyRegion'),
  customGameId: document.querySelector('#customGameId'),
  customGameMode: document.querySelector('#customGameMode'),
  customMapName: document.querySelector('#customMapName'),
  lobbyPassKey: document.querySelector('#lobbyPassKey'),
  customMinPlayers: document.querySelector('#customMinPlayers'),
  customMaxPlayers: document.querySelector('#customMaxPlayers'),
  notifyAtPlayers: document.querySelector('#notifyAtPlayers'),
  leaveAtPlayers: document.querySelector('#leaveAtPlayers'),
  adminNames: document.querySelector('#adminNames'),
  customGameCrc: document.querySelector('#customGameCrc'),
  customGameTimestamp: document.querySelector('#customGameTimestamp'),
  allowSpectating: document.querySelector('#allowSpectating'),
  saveLobbySettingsBtn: document.querySelector('#saveLobbySettingsBtn'),
  createLobbyBtn: document.querySelector('#createLobbyBtn'),
  stopLobbyBtn: document.querySelector('#stopLobbyBtn'),
  automationPhase: document.querySelector('#automationPhase'),
  activeLobbyId: document.querySelector('#activeLobbyId'),
  activePlayerCount: document.querySelector('#activePlayerCount'),
  publicationStatus: document.querySelector('#publicationStatus'),
  arcadePublicationStatus: document.querySelector('#arcadePublicationStatus'),
  lobbyProtocolStatus: document.querySelector('#lobbyProtocolStatus'),
  dotaClientVersion: document.querySelector('#dotaClientVersion'),
  leaveReason: document.querySelector('#leaveReason'),
  lobbyMembers: document.querySelector('#lobbyMembers'),
};

let adminPassword = sessionStorage.getItem('dokaAdminPassword') || '';
let credentialsDirty = false;
let lobbySettingsDirty = false;
let telegramDirty = false;
let regionsReady = false;
let lastAdminState = null;

function readPendingLobbyTemplate() {
  try {
    const saved = sessionStorage.getItem('dokaLobbyTemplate');
    if (saved) {
      const parsed = JSON.parse(saved);
      if (parsed && typeof parsed === 'object') return parsed;
    }
  } catch {
    // Fall through to the query-string compatibility path.
  }

  const query = new URLSearchParams(window.location.search);
  return query.get('template') === 'lobby' ? Object.fromEntries(query.entries()) : null;
}

const pendingLobbyTemplate = readPendingLobbyTemplate();
let lobbyTemplateApplied = false;

const dateTimeFormat = new Intl.DateTimeFormat('en-GB', {
  day: '2-digit',
  month: '2-digit',
  year: 'numeric',
  hour: '2-digit',
  minute: '2-digit',
  second: '2-digit',
});

function formatDate(iso) {
  if (!iso) return '-';
  const date = new Date(iso);
  if (Number.isNaN(date.getTime())) return '-';
  return dateTimeFormat.format(date);
}

function setBadge(label, klass) {
  els.adminStatus.textContent = label;
  els.adminStatus.className = `badge ${klass}`;
}

function showError(message) {
  els.adminError.hidden = !message;
  els.adminError.textContent = message || '';
}

function showMessage(message) {
  els.adminMessage.hidden = !message;
  els.adminMessage.textContent = message || '';
}

async function adminFetch(url, options = {}) {
  const res = await fetch(url, {
    ...options,
    cache: 'no-store',
    headers: {
      'Content-Type': 'application/json',
      'X-Admin-Password': adminPassword,
      ...(options.headers || {}),
    },
  });

  const data = await res.json().catch(() => ({}));
  if (!res.ok) throw new Error(data.error || `HTTP ${res.status}`);
  return data;
}

function unlocked() {
  return Boolean(adminPassword);
}

function initRegions(regions) {
  if (regionsReady || !regions) return;
  for (const [id, name] of Object.entries(regions).sort(([a], [b]) => Number(a) - Number(b))) {
    const option = document.createElement('option');
    option.value = id;
    option.textContent = `${name} (${id})`;
    els.lobbyRegion.append(option);
  }
  regionsReady = true;
}

function setLobbyInputs(settings) {
  els.lobbyName.value = settings.lobbyName || '';
  els.lobbyRegion.value = String(settings.serverRegion ?? 3);
  els.customGameId.value = settings.customGameId || '';
  els.customGameMode.value = settings.customGameMode || '';
  els.customMapName.value = settings.customMapName || '';
  els.lobbyPassKey.value = settings.passKey || '';
  els.customMinPlayers.value = String(settings.customMinPlayers ?? 2);
  els.customMaxPlayers.value = String(settings.customMaxPlayers ?? 10);
  els.notifyAtPlayers.value = String(settings.notifyAtPlayers ?? 8);
  els.leaveAtPlayers.value = String(settings.leaveAtPlayers ?? 9);
  els.adminNames.value = (settings.adminNames || []).join(', ');
  els.customGameCrc.value = settings.customGameCrc || '';
  els.customGameTimestamp.value = settings.customGameTimestamp || '';
  els.allowSpectating.checked = settings.allowSpectating !== false;
  lobbySettingsDirty = false;
}

async function resolveMissingTemplateMetadata() {
  if (els.customGameMode.value || !pendingLobbyTemplate?.sourceLobbyId) return;
  const controller = new AbortController();
  let timedOut = false;
  const timeout = setTimeout(() => {
    timedOut = true;
    controller.abort();
  }, 15000);
  try {
    showMessage('Resolving the internal addon name (local Workshop first, Dota GC fallback; up to 15 seconds)...');
    const data = await adminFetch('/api/admin/lobby-template', {
      method: 'POST',
      signal: controller.signal,
      body: JSON.stringify({
        lobbyId: pendingLobbyTemplate.sourceLobbyId,
        serverRegion: Number(pendingLobbyTemplate.serverRegion || 0),
        customGameId: pendingLobbyTemplate.customGameId,
      }),
    });
    els.customGameMode.value = data.templateMetadata?.customGameMode || '';
    if (!els.customGameTimestamp.value && data.templateMetadata?.customGameTimestamp) {
      els.customGameTimestamp.value = data.templateMetadata.customGameTimestamp;
    }
    if (!els.customGameMode.value) throw new Error('The source lobby has no internal addon name.');
    lobbySettingsDirty = true;
    showError('');
    showMessage(`Lobby template is complete: Workshop ${els.customGameId.value}, addon ${els.customGameMode.value}, map ${els.customMapName.value}. Review the thresholds, then create it.`);
  } catch (err) {
    showError(`Could not complete lobby template: ${timedOut ? 'metadata lookup timed out after 15 seconds' : err.message}`);
  } finally {
    clearTimeout(timeout);
  }
}

function applyLobbyTemplate() {
  if (!pendingLobbyTemplate || lobbyTemplateApplied) return;

  const setFromTemplate = (element, key) => {
    const value = pendingLobbyTemplate[key];
    if (value !== undefined && value !== null) element.value = String(value);
  };
  setFromTemplate(els.lobbyName, 'lobbyName');
  setFromTemplate(els.lobbyRegion, 'serverRegion');
  setFromTemplate(els.customGameId, 'customGameId');
  setFromTemplate(els.customGameMode, 'customGameMode');
  setFromTemplate(els.customMapName, 'customMapName');
  setFromTemplate(els.customMinPlayers, 'customMinPlayers');
  setFromTemplate(els.customMaxPlayers, 'customMaxPlayers');
  setFromTemplate(els.customGameCrc, 'customGameCrc');
  setFromTemplate(els.customGameTimestamp, 'customGameTimestamp');

  // The source feed never exposes the lobby password. Clear any stale value.
  els.lobbyPassKey.value = '';

  const maxPlayers = Number(els.customMaxPlayers.value);
  if (Number.isInteger(maxPlayers) && maxPlayers > 0) {
    const highestSafeThreshold = Math.max(1, maxPlayers - 1);
    const leaveAt = Math.min(Number(els.leaveAtPlayers.value) || highestSafeThreshold, highestSafeThreshold);
    els.leaveAtPlayers.value = String(leaveAt);
    els.notifyAtPlayers.value = String(Math.min(Number(els.notifyAtPlayers.value) || leaveAt, leaveAt));
  }

  lobbyTemplateApplied = true;
  lobbySettingsDirty = true;
  try {
    sessionStorage.removeItem('dokaLobbyTemplate');
  } catch {
    // The query-string fallback is still removed below.
  }
  window.history.replaceState({}, '', '/admin');
  showMessage(`Lobby template loaded: Workshop ${els.customGameId.value}, map ${els.customMapName.value}. Review the notification and leave thresholds, then create it.`);
  if (!els.customGameMode.value) {
    showError('The GC did not return the internal addon name for this row. Refresh the lobby list and create the template again; an incomplete template cannot be published.');
    resolveMissingTemplateMetadata();
  }
}

function lobbyPayload() {
  return {
    lobbyName: els.lobbyName.value,
    serverRegion: Number(els.lobbyRegion.value),
    customGameId: els.customGameId.value,
    customGameMode: els.customGameMode.value,
    customMapName: els.customMapName.value,
    passKey: els.lobbyPassKey.value,
    customMinPlayers: Number(els.customMinPlayers.value),
    customMaxPlayers: Number(els.customMaxPlayers.value),
    notifyAtPlayers: Number(els.notifyAtPlayers.value),
    leaveAtPlayers: Number(els.leaveAtPlayers.value),
    adminNames: els.adminNames.value,
    customGameCrc: els.customGameCrc.value,
    customGameTimestamp: els.customGameTimestamp.value,
    allowSpectating: els.allowSpectating.checked,
  };
}

function renderLobbyAutomation(automation) {
  const status = automation.status || {};
  const settings = automation.settings || {};
  const busy = ['creating', 'leaving'].includes(status.phase);
  const hasLobby = Boolean(status.lobbyId);

  if (!lobbySettingsDirty && !busy) setLobbyInputs(settings);
  if (unlocked() && regionsReady && automation.settings && !busy) applyLobbyTemplate();
  els.automationPhase.textContent = status.phase || 'idle';
  els.activeLobbyId.textContent = status.lobbyId || '-';
  els.activePlayerCount.textContent = String(status.humanCount ?? 0);
  els.publicationStatus.textContent = status.practicePublished === true
    ? 'listed'
    : status.practicePublished === false
      ? 'not listed'
      : status.armed
        ? 'checking'
        : '-';
  els.arcadePublicationStatus.textContent = status.arcadePublished === true
    ? 'listed'
    : status.arcadePublished === false
      ? 'not listed'
      : status.armed
        ? 'checking'
        : '-';
  const protocol = status.lobbyProtocol;
  els.lobbyProtocolStatus.textContent = protocol
    ? `type=${protocol.lobbyType}, visibility=${protocol.visibility}, auto=${protocol.autoCreated ? 'yes' : 'no'}, bot team=${protocol.botTeam ?? '-'}`
    : '-';
  els.leaveReason.textContent = status.leaveReason || '-';
  els.createLobbyBtn.disabled = busy || hasLobby || Boolean(status.armed);
  els.stopLobbyBtn.disabled = busy || (!hasLobby && !status.armed);
  els.saveLobbySettingsBtn.disabled = busy;

  const members = status.members || [];
  if (members.length) {
    els.lobbyMembers.textContent = members
      .map((member) => member.name ? `${member.name} (${member.steamId})` : member.steamId)
      .join(', ');
  } else {
    els.lobbyMembers.textContent = 'No real players in the active lobby.';
  }

  if (status.lastError) showError(status.lastError);
}

function pushSupported() {
  return 'serviceWorker' in navigator && 'PushManager' in window && 'Notification' in window;
}

async function currentPushSubscription() {
  if (!pushSupported()) return null;
  const registration = await navigator.serviceWorker.register('/sw.js');
  return registration.pushManager.getSubscription();
}

async function updateNotificationStatus() {
  if (!pushSupported()) {
    els.notificationStatus.textContent = 'not supported';
    els.enableNotificationsBtn.disabled = true;
    els.disableNotificationsBtn.disabled = true;
    els.testNotificationBtn.disabled = true;
    return;
  }

  try {
    const subscription = await currentPushSubscription();
    els.notificationStatus.textContent = subscription && Notification.permission === 'granted'
      ? 'enabled on this browser'
      : Notification.permission;
    els.disableNotificationsBtn.disabled = !subscription;
    els.testNotificationBtn.disabled = !subscription;
  } catch (err) {
    els.notificationStatus.textContent = err.message;
  }
}

function urlBase64ToUint8Array(value) {
  const padding = '='.repeat((4 - (value.length % 4)) % 4);
  const base64 = (value + padding).replace(/-/g, '+').replace(/_/g, '/');
  const raw = atob(base64);
  return Uint8Array.from([...raw].map((char) => char.charCodeAt(0)));
}

function renderSavedAccounts(credentials) {
  const accounts = Array.isArray(credentials.savedAccounts) ? credentials.savedAccounts : [];
  const currentSelection = els.savedSteamAccount.value;
  els.savedSteamAccount.replaceChildren();
  if (!accounts.length) {
    const option = document.createElement('option');
    option.value = '';
    option.textContent = 'No saved accounts';
    els.savedSteamAccount.append(option);
    els.savedSteamAccount.disabled = true;
    els.activateAccountBtn.disabled = true;
    return;
  }

  for (const account of accounts) {
    const option = document.createElement('option');
    option.value = account.accountName;
    option.textContent = account.accountName === credentials.activeAccountName
      ? `${account.accountName} (active)`
      : account.accountName;
    els.savedSteamAccount.append(option);
  }
  els.savedSteamAccount.disabled = false;
  els.activateAccountBtn.disabled = false;
  const preferred = accounts.some((account) => account.accountName === currentSelection)
    ? currentSelection
    : credentials.activeAccountName;
  els.savedSteamAccount.value = preferred || accounts[0].accountName;
}

function renderTelegram(telegram = {}) {
  const bot = telegram.botUsername ? `@${telegram.botUsername}` : 'bot';
  if (telegram.configured) {
    els.telegramStatus.textContent = `${bot}, ${telegram.recipientCount || 0} recipient(s)${telegram.lastError ? `; error: ${telegram.lastError}` : ''}`;
  } else {
    els.telegramStatus.textContent = 'not configured';
  }
  els.testTelegramBtn.disabled = !telegram.configured;
  els.disableTelegramBtn.disabled = !telegram.configured;

  const editing = document.activeElement === els.telegramToken
    || document.activeElement === els.telegramRecipientIds
    || telegramDirty;
  if (!editing) {
    els.telegramToken.value = '';
    els.telegramToken.placeholder = telegram.configured
      ? 'configured; leave blank to keep saved token'
      : 'paste token from @BotFather';
    els.telegramRecipientIds.value = (telegram.recipientIds || []).join(', ');
    telegramDirty = false;
  }
}

function render(data, options = {}) {
  lastAdminState = data;
  const preserveEditedInputs = options.preserveEditedInputs !== false;
  const connection = data.connection || {};
  const credentials = data.credentials || {};
  const token = data.refreshToken || {};
  const steamGuard = connection.steamGuard || {};

  els.loginPanel.hidden = unlocked();
  els.notificationPanel.hidden = !unlocked();
  els.telegramPanel.hidden = !unlocked();
  els.lobbyPanel.hidden = !unlocked();
  els.credentialsPanel.hidden = !unlocked();
  els.tokenPanel.hidden = !unlocked();
  els.guardPanel.hidden = !unlocked() || !steamGuard.required;

  setBadge(unlocked() ? 'unlocked' : 'locked', unlocked() ? 'badge-ok' : 'badge-muted');
  els.credentialsSource.textContent = credentials.source || '-';
  els.tokenStatus.textContent = token.exists ? 'saved' : 'missing';
  els.steamStatus.textContent = connection.steam || '-';
  els.gcStatus.textContent = connection.gc || '-';
  els.dotaClientVersion.textContent = connection.dotaClientVersion
    ? `${connection.dotaClientVersion}${connection.dotaClientVersionSource ? ` (${connection.dotaClientVersionSource})` : ''}`
    : 'not detected; set DOTA_CLIENT_VERSION';
  initRegions(data.regions);
  renderLobbyAutomation(data.lobbyAutomation || {});
  renderTelegram(data.lobbyAutomation?.telegram || {});
  renderSavedAccounts(credentials);

  const editingCredentials = document.activeElement === els.steamAccount
    || document.activeElement === els.steamPassword
    || credentialsDirty;

  if (!preserveEditedInputs || !editingCredentials) {
    els.steamAccount.value = credentials.accountName || '';
    els.steamPassword.value = '';
    els.steamPassword.placeholder = credentials.passwordSaved
      ? 'saved; leave blank to keep the saved password'
      : 'password required for a new account';
    credentialsDirty = false;
  }

  els.tokenSteamId.textContent = token.steamID || '-';
  els.tokenAccount.textContent = token.accountName || '-';
  els.tokenUpdated.textContent = formatDate(token.updatedAt);
  els.tokenExpires.textContent = formatDate(token.expiresAt);

  if (steamGuard.required) {
    const where = steamGuard.domain ? `Email domain: ${steamGuard.domain}` : 'Mobile authenticator code required';
    els.guardHint.textContent = steamGuard.lastCodeWrong ? `Last code was rejected. ${where}.` : where;
  } else {
    els.guardHint.textContent = '';
  }
}

async function loadAuth(options = {}) {
  if (!unlocked()) {
    render({});
    return;
  }

  try {
    showError('');
    const data = await adminFetch('/api/admin/auth');
    render(data, options);
  } catch (err) {
    showError(err.message);
    if (err.message.includes('Invalid admin password')) {
      adminPassword = '';
      sessionStorage.removeItem('dokaAdminPassword');
    }
    render({});
  }
}

async function saveCredentials() {
  try {
    showError('');
    showMessage('');
    const data = await adminFetch('/api/admin/auth', {
      method: 'PUT',
      body: JSON.stringify({
        accountName: els.steamAccount.value,
        password: els.steamPassword.value,
        clearRefreshToken: els.clearToken.checked,
      }),
    });
    credentialsDirty = false;
    render(data);
    showMessage('Credentials saved. Reconnect started.');
  } catch (err) {
    showError(err.message);
  }
}

async function submitSteamGuard() {
  try {
    showError('');
    showMessage('');
    const data = await adminFetch('/api/admin/steam-guard', {
      method: 'POST',
      body: JSON.stringify({ code: els.steamGuardCode.value }),
    });
    els.steamGuardCode.value = '';
    render(data);
    showMessage('Steam Guard code submitted.');
  } catch (err) {
    showError(err.message);
  }
}

async function clearRefreshToken() {
  try {
    showError('');
    showMessage('');
    const data = await adminFetch('/api/admin/clear-token', { method: 'POST', body: '{}' });
    render(data);
    showMessage('Refresh token cleared.');
  } catch (err) {
    showError(err.message);
  }
}

async function saveLobbySettings() {
  try {
    showError('');
    showMessage('');
    const data = await adminFetch('/api/admin/lobby-settings', {
      method: 'PUT',
      body: JSON.stringify(lobbyPayload()),
    });
    lobbySettingsDirty = false;
    render(data);
    showMessage('Lobby settings saved.');
  } catch (err) {
    showError(err.message);
  }
}

async function createLobby() {
  try {
    showError('');
    showMessage('Creating lobby and waiting for the Dota GC snapshot...');
    els.createLobbyBtn.disabled = true;
    const data = await adminFetch('/api/admin/lobby', {
      method: 'POST',
      body: JSON.stringify(lobbyPayload()),
    });
    lobbySettingsDirty = false;
    render(data);
    showMessage('Lobby created. Player monitoring and safe auto-leave are active.');
  } catch (err) {
    showError(err.message);
    showMessage('');
  } finally {
    if (!lastAdminState?.lobbyAutomation?.status?.armed) els.createLobbyBtn.disabled = false;
  }
}

async function stopLobby() {
  try {
    showError('');
    showMessage('Leaving lobby...');
    els.stopLobbyBtn.disabled = true;
    const data = await adminFetch('/api/admin/lobby', {
      method: 'DELETE',
      body: '{}',
    });
    render(data);
    showMessage('The bot left the lobby.');
  } catch (err) {
    showError(err.message);
    showMessage('');
  }
}

async function enableNotifications() {
  try {
    showError('');
    if (!pushSupported()) throw new Error('Push notifications are not supported by this browser.');
    const permission = await Notification.requestPermission();
    if (permission !== 'granted') throw new Error(`Notification permission is ${permission}.`);
    const registration = await navigator.serviceWorker.register('/sw.js');
    let subscription = await registration.pushManager.getSubscription();
    if (!subscription) {
      const publicKey = lastAdminState?.lobbyAutomation?.push?.publicKey;
      if (!publicKey) throw new Error('Web Push public key is unavailable.');
      subscription = await registration.pushManager.subscribe({
        userVisibleOnly: true,
        applicationServerKey: urlBase64ToUint8Array(publicKey),
      });
    }
    const data = await adminFetch('/api/admin/push-subscription', {
      method: 'PUT',
      body: JSON.stringify({ subscription: subscription.toJSON() }),
    });
    render(data);
    await updateNotificationStatus();
    showMessage('Browser push notifications enabled.');
  } catch (err) {
    showError(err.message);
  }
}

async function disableNotifications() {
  try {
    showError('');
    const subscription = await currentPushSubscription();
    if (subscription) {
      await adminFetch('/api/admin/push-subscription', {
        method: 'DELETE',
        body: JSON.stringify({ endpoint: subscription.endpoint }),
      });
      await subscription.unsubscribe();
    }
    await updateNotificationStatus();
    showMessage('Browser push notifications disabled on this browser.');
  } catch (err) {
    showError(err.message);
  }
}

async function testNotification() {
  try {
    showError('');
    const data = await adminFetch('/api/admin/test-notification', { method: 'POST', body: '{}' });
    const result = data.notificationResult || {};
    showMessage(`Test notification sent: ${result.delivered || 0} delivered, ${result.failed || 0} failed.`);
  } catch (err) {
    showError(err.message);
  }
}

async function saveTelegram() {
  try {
    showError('');
    showMessage('Checking the Telegram bot and saving recipients...');
    const data = await adminFetch('/api/admin/telegram', {
      method: 'PUT',
      body: JSON.stringify({
        token: els.telegramToken.value,
        recipientIds: els.telegramRecipientIds.value,
      }),
    });
    telegramDirty = false;
    render(data);
    showMessage('Telegram notifications saved. Use Send test to verify every recipient.');
  } catch (err) {
    showMessage('');
    showError(err.message);
  }
}

async function disableTelegram() {
  try {
    showError('');
    const data = await adminFetch('/api/admin/telegram', { method: 'DELETE', body: '{}' });
    telegramDirty = false;
    render(data);
    showMessage('Telegram notifications disabled and the saved bot token removed.');
  } catch (err) {
    showError(err.message);
  }
}

async function testTelegram() {
  try {
    showError('');
    const data = await adminFetch('/api/admin/test-telegram', { method: 'POST', body: '{}' });
    const result = data.telegramResult || {};
    render(data);
    const errors = result.errors?.length ? ` ${result.errors.join('; ')}` : '';
    showMessage(`Telegram test: ${result.delivered || 0} delivered, ${result.failed || 0} failed.${errors}`);
  } catch (err) {
    showError(err.message);
  }
}

async function activateSavedAccount() {
  try {
    showError('');
    showMessage('Switching Steam account and reconnecting Dota GC...');
    const data = await adminFetch('/api/admin/steam-account/activate', {
      method: 'POST',
      body: JSON.stringify({ accountName: els.savedSteamAccount.value }),
    });
    credentialsDirty = false;
    render(data);
    showMessage('Steam account activated. Reconnection continues in the background.');
  } catch (err) {
    showMessage('');
    showError(err.message);
  }
}

els.unlockBtn.addEventListener('click', () => {
  adminPassword = els.adminPassword.value;
  sessionStorage.setItem('dokaAdminPassword', adminPassword);
  loadAuth({ preserveEditedInputs: false });
});

els.adminPassword.addEventListener('keydown', (event) => {
  if (event.key === 'Enter') els.unlockBtn.click();
});

els.reloadBtn.addEventListener('click', () => {
  credentialsDirty = false;
  loadAuth({ preserveEditedInputs: false });
});
els.saveBtn.addEventListener('click', saveCredentials);
els.submitGuardBtn.addEventListener('click', submitSteamGuard);
els.clearTokenBtn.addEventListener('click', clearRefreshToken);
els.saveLobbySettingsBtn.addEventListener('click', saveLobbySettings);
els.createLobbyBtn.addEventListener('click', createLobby);
els.stopLobbyBtn.addEventListener('click', stopLobby);
els.enableNotificationsBtn.addEventListener('click', enableNotifications);
els.disableNotificationsBtn.addEventListener('click', disableNotifications);
els.testNotificationBtn.addEventListener('click', testNotification);
els.saveTelegramBtn.addEventListener('click', saveTelegram);
els.testTelegramBtn.addEventListener('click', testTelegram);
els.disableTelegramBtn.addEventListener('click', disableTelegram);
els.activateAccountBtn.addEventListener('click', activateSavedAccount);

els.steamAccount.addEventListener('input', () => {
  credentialsDirty = true;
});

els.steamPassword.addEventListener('input', () => {
  credentialsDirty = true;
});

els.savedSteamAccount.addEventListener('change', () => {
  if (!els.savedSteamAccount.value) return;
  els.steamAccount.value = els.savedSteamAccount.value;
  els.steamPassword.value = '';
  credentialsDirty = true;
});

[els.telegramToken, els.telegramRecipientIds].forEach((element) => {
  element.addEventListener('input', () => {
    telegramDirty = true;
  });
});

[
  els.lobbyName,
  els.lobbyRegion,
  els.customGameId,
  els.customGameMode,
  els.customMapName,
  els.lobbyPassKey,
  els.customMinPlayers,
  els.customMaxPlayers,
  els.notifyAtPlayers,
  els.leaveAtPlayers,
  els.adminNames,
  els.customGameCrc,
  els.customGameTimestamp,
  els.allowSpectating,
].forEach((element) => {
  element.addEventListener('input', () => {
    lobbySettingsDirty = true;
  });
  element.addEventListener('change', () => {
    lobbySettingsDirty = true;
  });
});

els.steamGuardCode.addEventListener('keydown', (event) => {
  if (event.key === 'Enter') els.submitGuardBtn.click();
});

if (adminPassword) {
  els.adminPassword.value = adminPassword;
}

loadAuth({ preserveEditedInputs: false });
updateNotificationStatus();
setInterval(loadAuth, 5000);