(function () {
  const browser = typeof chrome !== 'undefined' && chrome.storage ? chrome : typeof browser !== 'undefined' ? browser : chrome;
  const KEY = 'bridgeSwarmSettings';
  const DEFAULTS = {
    defaultAppName: 'bridge-swarm',
    defaultRequestTimeoutMs: 0,
    defaultMaxPeers: 0,
    readyTimeoutMs: 0,
    disableOnFileUrls: false,
    notifyOnDisconnect: false,
    debug: false
  };

  const defaultAppNameEl = document.getElementById('defaultAppName');
  const defaultRequestTimeoutMsEl = document.getElementById('defaultRequestTimeoutMs');
  const defaultMaxPeersEl = document.getElementById('defaultMaxPeers');
  const readyTimeoutMsEl = document.getElementById('readyTimeoutMs');
  const disableOnFileUrlsEl = document.getElementById('disableOnFileUrls');
  const notifyOnDisconnectEl = document.getElementById('notifyOnDisconnect');
  const debugEl = document.getElementById('debug');
  const btnSave = document.getElementById('btnSave');
  const btnReset = document.getElementById('btnReset');
  const toastEl = document.getElementById('toast');

  function showToast(msg, isError) {
    toastEl.textContent = msg;
    toastEl.className = 'toast show' + (isError ? ' err' : '');
    clearTimeout(showToast._t);
    showToast._t = setTimeout(function () {
      toastEl.classList.remove('show');
    }, 2500);
  }

  function load() {
    browser.storage.local.get(KEY, function (result) {
      const s = result[KEY] || {};
      defaultAppNameEl.value = s.defaultAppName != null ? s.defaultAppName : DEFAULTS.defaultAppName;
      defaultRequestTimeoutMsEl.value = s.defaultRequestTimeoutMs != null ? s.defaultRequestTimeoutMs : DEFAULTS.defaultRequestTimeoutMs;
      defaultMaxPeersEl.value = s.defaultMaxPeers != null ? s.defaultMaxPeers : DEFAULTS.defaultMaxPeers;
      readyTimeoutMsEl.value = s.readyTimeoutMs != null ? s.readyTimeoutMs : DEFAULTS.readyTimeoutMs;
      disableOnFileUrlsEl.checked = s.disableOnFileUrls === true;
      notifyOnDisconnectEl.checked = s.notifyOnDisconnect === true;
      debugEl.checked = s.debug === true;
    });
  }

  function validate() {
    const appName = (defaultAppNameEl.value || '').trim();
    const timeout = parseInt(defaultRequestTimeoutMsEl.value, 10);
    if (isNaN(timeout) || timeout < 0) {
      showToast('Request timeout must be 0 or a positive number.', true);
      return null;
    }
    if (timeout > 300000) {
      showToast('Request timeout cannot exceed 300000 ms.', true);
      return null;
    }
    const maxPeers = parseInt(defaultMaxPeersEl.value, 10);
    if (isNaN(maxPeers) || maxPeers < 0) {
      showToast('Max peers must be 0 or a positive number.', true);
      return null;
    }
    const readyTimeout = parseInt(readyTimeoutMsEl.value, 10);
    if (isNaN(readyTimeout) || readyTimeout < 0) {
      showToast('Ready timeout must be 0 or a positive number.', true);
      return null;
    }
    if (readyTimeout > 60000) {
      showToast('Ready timeout cannot exceed 60000 ms.', true);
      return null;
    }
    return {
      defaultAppName: appName || DEFAULTS.defaultAppName,
      defaultRequestTimeoutMs: timeout,
      defaultMaxPeers: maxPeers,
      readyTimeoutMs: readyTimeout,
      disableOnFileUrls: disableOnFileUrlsEl.checked,
      notifyOnDisconnect: notifyOnDisconnectEl.checked,
      debug: debugEl.checked
    };
  }

  btnSave.addEventListener('click', function () {
    const s = validate();
    if (!s) return;
    browser.storage.local.set({ [KEY]: s }, function () {
      if (browser.runtime.lastError) {
        showToast('Save failed: ' + browser.runtime.lastError.message, true);
        return;
      }
      showToast('Saved.');
    });
  });

  btnReset.addEventListener('click', function () {
    defaultAppNameEl.value = DEFAULTS.defaultAppName;
    defaultRequestTimeoutMsEl.value = DEFAULTS.defaultRequestTimeoutMs;
    defaultMaxPeersEl.value = DEFAULTS.defaultMaxPeers;
    readyTimeoutMsEl.value = DEFAULTS.readyTimeoutMs;
    disableOnFileUrlsEl.checked = DEFAULTS.disableOnFileUrls;
    notifyOnDisconnectEl.checked = DEFAULTS.notifyOnDisconnect;
    debugEl.checked = DEFAULTS.debug;
    browser.storage.local.set({ [KEY]: DEFAULTS }, function () {
      if (browser.runtime.lastError) {
        showToast('Reset failed: ' + browser.runtime.lastError.message, true);
        return;
      }
      showToast('Reset to defaults.');
    });
  });

  load();
})();