import { renderHeader } from '../components/header.js';
import { addAppLogEntry, authService, closeCurrentSessionAndSignOut } from '../state.js';

export const pageMeta = { id: 'settings-view', title: 'Настройки' };

function formatBuildStamp(rawValue) {
  const value = String(rawValue || '').trim();
  if (!/^\d{14}$/.test(value)) return value;
  const yyyy = value.slice(0, 4);
  const mm = value.slice(4, 6);
  const dd = value.slice(6, 8);
  const hh = value.slice(8, 10);
  const min = value.slice(10, 12);
  const ss = value.slice(12, 14);
  return `${yyyy}-${mm}-${dd}/${hh}:${min}__${ss}`;
}

function formatVersionForUi(rawValue) {
  const value = String(rawValue || '').trim();
  if (!value) return 'n/a';
  const formatted = formatBuildStamp(value);
  if (formatted && formatted !== value) {
    return `${formatted} (${value})`;
  }
  return value;
}

export function render({ navigate }) {
  const screen = document.createElement('section');
  screen.className = 'stack';
  let isDisposed = false;

  screen.append(
    renderHeader({
      title: 'Настройки',
      leftAction: { label: '←', onClick: () => navigate('profile-view') },
    }),
  );

  const card = document.createElement('div');
  card.className = 'card stack';
  card.innerHTML = `
    <button class="text-btn" type="button" id="settings-device">Устройства</button>
    <button class="text-btn" type="button" id="settings-servers">Настройки серверов</button>
    <button class="text-btn" type="button" id="settings-language">Язык / Language</button>
    <button class="text-btn" type="button" id="settings-signout">Завершить текущий сеанс</button>
  `;

  card.querySelector('#settings-device').addEventListener('click', () => navigate('device-view'));
  card.querySelector('#settings-servers').addEventListener('click', () => navigate('server-settings-view'));
  card.querySelector('#settings-language').addEventListener('click', () => navigate('language-view'));

  const signOutBtn = card.querySelector('#settings-signout');
  signOutBtn.addEventListener('click', async () => {
    const confirmed = window.confirm(
      'Завершить текущую сессию на сервере, отключиться, очистить локальные данные и перейти на стартовый экран?'
    );
    if (!confirmed) return;

    signOutBtn.disabled = true;
    try {
      addAppLogEntry({
        level: 'info',
        source: 'session',
        message: 'Запрошено завершение текущей сессии',
      });
      await closeCurrentSessionAndSignOut({
        infoMessage: 'Сеанс завершён. Выполните вход заново.',
      });
    } finally {
      signOutBtn.disabled = false;
    }
  });

  const versionCard = document.createElement('div');
  versionCard.className = 'card stack';

  const title = document.createElement('p');
  title.className = 'field-label';
  title.textContent = 'Версии';

  const clientVersion = document.createElement('p');
  clientVersion.className = 'meta-muted';
  clientVersion.textContent = `Клиент: ${formatVersionForUi(window.__SHINE_CLIENT_VERSION__)}`;

  const uiBuild = document.createElement('p');
  uiBuild.className = 'meta-muted';
  uiBuild.textContent = `Сборка UI: ${formatVersionForUi(window.__SHINE_BUILD_HASH__)}`;

  const serverVersion = document.createElement('p');
  serverVersion.className = 'meta-muted';
  serverVersion.textContent = 'Сервер: загружается...';

  versionCard.append(title, clientVersion, uiBuild, serverVersion);

  const developerCard = document.createElement('div');
  developerCard.className = 'card stack';
  developerCard.innerHTML = `
    <button class="text-btn" type="button" id="settings-developer">Настройки разработчика</button>
  `;
  developerCard.querySelector('#settings-developer').addEventListener('click', () => navigate('developer-settings-view'));

  void (async () => {
    try {
      let value = '';
      try {
        const pingResp = await authService.ws.request('Ping', { ts: Date.now() }, 7000);
        value = String(pingResp?.payload?.serverVersion || pingResp?.serverVersion || '').trim();
      } catch {
        // fallback below
      }

      if (!value) {
        const infoResp = await authService.ws.request('GetServerInfo', {});
        value = String(infoResp?.payload?.version || '').trim();
      }
      if (!isDisposed) serverVersion.textContent = `Сервер: ${formatVersionForUi(value)}`;
    } catch {
      if (!isDisposed) {
        serverVersion.textContent = 'Сервер: недоступно';
      }
    }
  })();

  screen.cleanup = () => {
    isDisposed = true;
  };
  screen.append(card);
  screen.append(versionCard);
  screen.append(developerCard);
  return screen;
}