(function() {
  'use strict';

  window.__APP_CONFIG__ = window.__APP_CONFIG__ || {};
  window.__CONFIG_READY__ = false;

  let configResolve;
  let configReject;
  window.__CONFIG_PROMISE__ = new Promise((resolve, reject) => {
    configResolve = resolve;
    configReject = reject;
  });

  const VERSION_SUCCESS_URL_KEY = 'VERSION_Success_URL';
  const CONFIG_SUCCESS_URL_KEY = 'CONFIG_Success_URL';
  const CONFIG_CACHE_KEY = 'APP_CONFIG_CACHE';
  const VERSION_STORAGE_KEY = 'version';
  const VERSION_UPDATE_LOCK_KEY = 'version_update_lock';
  const VERSION_LAST_RELOAD_KEY = 'version_last_reload';
  const AUTH_TOKEN_KEY = 'peransa_token';
  const VERSION_RETRY_ROUNDS = 5;
  const CONFIG_RETRY_ROUNDS = 5;
  const CONFIG_TIMEOUT = 12000;

  let configTimeoutId;
  let mainScriptLoaded = false;

  function getProtocol() {
    return window.location.protocol === 'https:' ? 'https:' : 'http:';
  }

  function getVersionUrls() {
    const protocol = getProtocol();

    return [
      'https://nerkh.gold/get_version',
      'https://tablo.talasevin.ir/get_version',
      'https://abshode-service.montgit.ir/server/get_version',
      protocol + '//212.23.201.173:8381/get_version',
      protocol + '//91.212.174.137:4040/server/get_version'
    ];
  }

  function getConfigUrls() {
    const protocol = getProtocol();

    return [
      protocol + '//nerkh.gold/get_user',
      protocol + '//tablo.talasevin.ir/get_user',
      protocol + '//abshode-service.montgit.ir/server/get_user',
      protocol + '//212.23.201.173:8381/get_user',
      protocol + '//91.212.174.137:4040/server/get_user'
    ];
  }

  function sortUrls(urls, successKey) {
    const lastSuccessUrl = localStorage.getItem(successKey);
    if (!lastSuccessUrl) return urls.slice();
    return [lastSuccessUrl].concat(urls.filter((url) => url !== lastSuccessUrl));
  }

  function clearStaleSuccessUrl(key, url) {
    if (localStorage.getItem(key) === url) {
      localStorage.removeItem(key);
    }
  }

  function normalizeVersion(value) {
    if (value === null || value === undefined) return '';
    return String(value).trim();
  }

  function readUserVersion(user) {
    if (!user || typeof user !== 'object' || Array.isArray(user)) return '';
    const version = user.version ?? user.value;
    return version === undefined || version === null ? '' : String(version).trim();
  }

  function normalizeVersionResponse(response) {
    if (typeof response === 'string' || typeof response === 'number') {
      return String(response).trim();
    }
    if (!response || typeof response !== 'object') return '';

    if (typeof response.data === 'string' || typeof response.data === 'number') {
      return String(response.data).trim();
    }

    const directVersion =
      response.version ??
      response.value ??
      (response.data && typeof response.data === 'object'
        ? response.data.version ?? response.data.value
        : undefined);

    if (directVersion !== undefined && directVersion !== null) {
      return String(directVersion).trim();
    }

    return readUserVersion(response.user);
  }

  function readCachedAppConfig() {
    try {
      const raw = localStorage.getItem(CONFIG_CACHE_KEY);
      if (!raw) return null;
      const payload = JSON.parse(raw);
      if (!payload || typeof payload !== 'object' || !payload.config) return null;
      return payload.config;
    } catch (error) {
      console.warn('Failed to read cached get_user:', error);
      localStorage.removeItem(CONFIG_CACHE_KEY);
      return null;
    }
  }

  function writeCachedAppConfig(config) {
    try {
      localStorage.setItem(
        CONFIG_CACHE_KEY,
        JSON.stringify({
          cached_at: Date.now(),
          config: config
        })
      );
    } catch (error) {
      console.warn('Failed to write get_user cache:', error);
    }
  }

  function getStoredAppVersion() {
    return localStorage.getItem(VERSION_STORAGE_KEY);
  }

  function writeStoredAppVersion(version) {
    localStorage.setItem(VERSION_STORAGE_KEY, normalizeVersion(version));
  }

  function shouldUpdateForVersion(serverVersion) {
    const normalized = normalizeVersion(serverVersion);
    if (!normalized) return false;

    const stored = getStoredAppVersion();
    if (!stored) {
      writeStoredAppVersion(normalized);
      return false;
    }

    return stored !== normalized;
  }

  function canStartVersionUpdate(serverVersion) {
    const version = normalizeVersion(serverVersion);
    if (!version) return false;

    if (sessionStorage.getItem(VERSION_LAST_RELOAD_KEY) === version) {
      return false;
    }

    const rawLock = sessionStorage.getItem(VERSION_UPDATE_LOCK_KEY);
    if (rawLock) {
      try {
        const lock = JSON.parse(rawLock);
        const isSameVersion = lock.version === version;
        const isFreshLock = Date.now() - lock.started_at < 60_000;
        if (isSameVersion && isFreshLock) return false;
      } catch {
        sessionStorage.removeItem(VERSION_UPDATE_LOCK_KEY);
      }
    }

    return true;
  }

  function startVersionUpdateLock(serverVersion) {
    sessionStorage.setItem(
      VERSION_UPDATE_LOCK_KEY,
      JSON.stringify({
        version: normalizeVersion(serverVersion),
        started_at: Date.now()
      })
    );
  }

  function finishVersionUpdateBeforeReload(serverVersion) {
    const version = normalizeVersion(serverVersion);
    writeStoredAppVersion(version);
    sessionStorage.setItem(VERSION_LAST_RELOAD_KEY, version);
    sessionStorage.removeItem(VERSION_UPDATE_LOCK_KEY);
  }

  function cancelVersionUpdateLock() {
    sessionStorage.removeItem(VERSION_UPDATE_LOCK_KEY);
  }

  function preserveAuthToken() {
    return localStorage.getItem(AUTH_TOKEN_KEY);
  }

  function restoreAuthToken(token) {
    if (token) {
      localStorage.setItem(AUTH_TOKEN_KEY, token);
    }
  }

  function clearBootstrapCachesKeepToken() {
    const token = preserveAuthToken();
    localStorage.removeItem(CONFIG_CACHE_KEY);
    localStorage.removeItem(CONFIG_SUCCESS_URL_KEY);
    localStorage.removeItem(VERSION_SUCCESS_URL_KEY);
    restoreAuthToken(token);
  }

  function hardReloadApp() {
    const refreshUrl =
      window.location.origin +
      window.location.pathname +
      '?__app_refresh=' +
      Date.now() +
      (window.location.hash || '');
    window.location.replace(refreshUrl);
  }

  async function fetchJson(url, timeout) {
    const controller = new AbortController();
    const timeoutId = window.setTimeout(() => controller.abort(), timeout);

    try {
      const response = await fetch(url, {
        method: 'GET',
        headers: {
          Accept: 'application/json'
        },
        cache: 'no-store',
        signal: controller.signal
      });

      if (!response.ok) {
        throw new Error('Request failed: ' + response.status);
      }

      const contentType = response.headers.get('content-type') || '';

      if (!contentType.includes('application/json')) {
        const text = await response.text();
        throw new Error('Response is not JSON. Received: ' + text.substring(0, 100));
      }

      return await response.json();
    } finally {
      window.clearTimeout(timeoutId);
    }
  }

  async function loadVersion(rounds) {
    rounds = rounds || VERSION_RETRY_ROUNDS;
    const urls = sortUrls(getVersionUrls(), VERSION_SUCCESS_URL_KEY);

    for (let round = 1; round <= rounds; round++) {
      for (let index = 0; index < urls.length; index++) {
        const url = urls[index];
        const timeout = index === urls.length - 1 ? 6000 : 3500;

        try {
          const data = await fetchJson(url, timeout);
          const version = normalizeVersionResponse(data);
          if (!version) {
            throw new Error('Version response is empty');
          }
          localStorage.setItem(VERSION_SUCCESS_URL_KEY, url);
          console.log('Version loaded from:', url, version);
          return version;
        } catch (error) {
          clearStaleSuccessUrl(VERSION_SUCCESS_URL_KEY, url);
          console.warn('Version failed from', url, 'round:', round, error);
        }
      }
    }

    console.warn('Version check failed from all endpoints');
    return null;
  }

  async function fetchConfig(rounds) {
    rounds = rounds || CONFIG_RETRY_ROUNDS;
    const urls = sortUrls(getConfigUrls(), CONFIG_SUCCESS_URL_KEY);

    for (let round = 1; round <= rounds; round++) {
      for (let index = 0; index < urls.length; index++) {
        const url = urls[index];
        const timeout = index === urls.length - 1 ? 7000 : 4000;

        try {
          const config = await fetchJson(url, timeout);

          if (!config || typeof config !== 'object') {
            throw new Error('Config response is invalid');
          }

          localStorage.setItem(CONFIG_SUCCESS_URL_KEY, url);
          writeCachedAppConfig(config);
          return { config: config, url: url };
        } catch (error) {
          clearStaleSuccessUrl(CONFIG_SUCCESS_URL_KEY, url);
          console.warn('Config failed from', url, 'round:', round, error);
        }
      }
    }

    throw new Error('Cannot load config from any server');
  }

  function applyConfig(config) {
    window.__APP_CONFIG__ = config || {};
    window.__CONFIG_READY__ = true;

    if (config && config.user && config.user.name_fa) {
      document.title = 'پنل مدیریت ' + '-' + config.user.name_fa;
    }

    if (config && config.user && config.user.avatar) {
      const faviconUrl = config.user.avatar;
      const existingIcons = document.querySelectorAll('link[rel*="icon"]');
      existingIcons.forEach((icon) => icon.remove());

      const link = document.createElement('link');
      link.rel = 'icon';
      link.type = 'image/png';
      link.href = faviconUrl + '?v=' + Date.now();
      document.head.appendChild(link);
    }
  }

  function finishConfigLoad(config, error) {
    if (configResolve) {
      configResolve(config);
    }

    if (error) {
      window.dispatchEvent(new CustomEvent('configError', { detail: error }));
    } else {
      window.dispatchEvent(new CustomEvent('configReady', { detail: config }));
    }

    if (configTimeoutId) {
      clearTimeout(configTimeoutId);
      configTimeoutId = null;
    }

    loadMainScript();
  }

  async function applyVersionUpdate(serverVersion) {
    startVersionUpdateLock(serverVersion);

    try {
      const { config } = await fetchConfig();
      clearBootstrapCachesKeepToken();
      writeCachedAppConfig(config);
      applyConfig(config);
      finishVersionUpdateBeforeReload(serverVersion);
      console.log('App version changed — hard refresh', serverVersion);
      hardReloadApp();
      return true;
    } catch (error) {
      console.error('Version update failed:', error);
      cancelVersionUpdateLock();
      return false;
    }
  }

  async function loadConfig() {
    try {
      // ۱) کش get_user — اگر بود سریع اعمال شود
      const cachedConfig = readCachedAppConfig();
      if (cachedConfig) {
        applyConfig(cachedConfig);
        console.log('Applied cached get_user');
      }

      // ۲) get_version — اگر تغییر کرده hard refresh
      const remoteVersion = await loadVersion();
      if (remoteVersion && shouldUpdateForVersion(remoteVersion) && canStartVersionUpdate(remoteVersion)) {
        const updating = await applyVersionUpdate(remoteVersion);
        if (updating) {
          return;
        }
      }

      // ۳) تازه کردن get_user و کش
      const { config, url } = await fetchConfig();
      applyConfig(config);
      console.log('Config loaded successfully from', url, config);
      finishConfigLoad(config);
    } catch (error) {
      console.warn('Config loader: Could not fetch config from any endpoint');
      console.warn('Error details:', error && error.message ? error.message : error);
      console.warn('App will continue with empty/cached config.');

      const cachedConfig = readCachedAppConfig();
      if (cachedConfig) {
        applyConfig(cachedConfig);
        finishConfigLoad(cachedConfig, error);
        return;
      }

      window.__APP_CONFIG__ = {};
      window.__CONFIG_READY__ = true;
      finishConfigLoad({}, error);
    }
  }

  function loadMainScript() {
    if (mainScriptLoaded || document.querySelector('script[src="/src/main.ts"]')) {
      return;
    }

    mainScriptLoaded = true;

    import('/src/main.ts').then(() => {
      console.log('Main script loaded and executed');
    });
  }

  configTimeoutId = setTimeout(function() {
    if (!mainScriptLoaded) {
      console.warn('Config loader: Timeout reached. Loading main.ts with empty/cached config.');
      const cachedConfig = readCachedAppConfig();
      window.__APP_CONFIG__ = cachedConfig || window.__APP_CONFIG__ || {};
      window.__CONFIG_READY__ = true;

      if (configResolve) {
        configResolve(window.__APP_CONFIG__);
      }

      loadMainScript();
    }
  }, CONFIG_TIMEOUT);

  loadConfig();
})();