/* Function to get version of Chrome. https://stackoverflow.com/a/4900484 */
function getMajorVerison(){
  var raw = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
  return raw ? parseInt(raw[2], 10) : false;
}

/* Configure WebRTC leak prevention default setting, depending on Chrome version. */
chrome.storage.local.get(null, function(items){
  /* Use webRTCIPHandlingPolicy in newer versions of Chrome. */
  if(getMajorVerison() > 47){
    if(items.rtcIPHandling == undefined){
      try{
        chrome.storage.local.set({
          rtcIPHandling: 'default_public_interface_only'
        }, function(){
          chrome.privacy.network.webRTCIPHandlingPolicy.set({
            value: 'default_public_interface_only'
          });
        })
      }
      catch(e){
        console.log("Error: " + e.message);
      }
    }
  }
  /* Use webRTCMultipleRoutesEnabled in older versions of Chrome. */
  else if(getMajorVerison() > 41 && getMajorVerison() < 48){
    if(items.rtcMultipleRoutes == undefined){
      try{
        chrome.storage.local.set({
          rtcMultipleRoutes: true
        }, function(){
          chrome.privacy.network.webRTCMultipleRoutesEnabled.set({
            value: false,
            scope: 'regular'
          });
        })
      }
      catch(e){
        console.log("Error: " + e.message);
      }
    }
  }
});

/* Open options page on install. */
chrome.runtime.onInstalled.addListener(function(details){
  if(details.reason == "install"){
    chrome.runtime.openOptionsPage();
  }
});

/* Open options page on toolbar icon click. */
chrome.browserAction.onClicked.addListener(function(){
  chrome.runtime.openOptionsPage();
});