/* 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;
}

/* Function to determine if extension is allowed to run in Incognito mode. */
function incognitoAllowedCheck(){
  chrome.extension.isAllowedIncognitoAccess(function(state){
    var incognitoAllowed = document.getElementById('incognitoAllowed');
    var incognitoDisallowed = document.getElementById('incognitoDisallowed');

    if(state){
      incognitoDisallowed.style.display = 'none';
    }
    else{
      incognitoAllowed.style.display = 'none';
    }
  });
}

/* Function to display setting page content, depending on Chrome version. */
function displayContent(){
  var divContent = document.getElementById('content');
  var divNew = document.getElementById('new');
  var divLegacy = document.getElementById('legacy');
  var pLegacyProxy = document.getElementById('legacyProxy');
  var divFail = document.getElementById('fail');
  var divIncognito = document.getElementById('incognito');
  var divApply = document.getElementById('applyButton');

  if(getMajorVerison() > 47){
    divLegacy.style.display = 'none';
    divFail.style.display = 'none';
    incognitoAllowedCheck();
  }
  else if(getMajorVerison() > 41 && getMajorVerison() < 47){
    divNew.style.display = 'none';
    divFail.style.display = 'none';
    pLegacyProxy.style.display = 'none';
    incognitoAllowedCheck();
  }
  else if(getMajorVerison() == 47){
    divNew.style.display = 'none';
    divFail.style.display = 'none';
    incognitoAllowedCheck();
  }
  else{
    divContent.style.display = 'none';
    divIncognito.style.display = 'none';
    divApply.style.display = 'none';
  }
}

/* Function to save and set options. */
function saveOptions(){
  if(getMajorVerison() > 47){
    var policy = document.getElementById('policy').value;
    chrome.storage.local.set({
      rtcIPHandling: policy
    }, function(){
      try{
        chrome.storage.local.get('rtcIPHandling', function(items){
        chrome.privacy.network.webRTCIPHandlingPolicy.set({
          value: items.rtcIPHandling
        });
        });
      }
      catch(e){
        console.log("Error: " + e.message);
      }
    });
  }
  else if(getMajorVerison() > 41 && getMajorVerison() < 47){
    var rtcMultipleRoutes = document.getElementById('multipleroutes').checked;
    chrome.storage.local.set({
      rtcMultipleRoutes: rtcMultipleRoutes
    }, function(){
      try{
        chrome.storage.local.get('rtcMultipleRoutes', function(items){
          chrome.privacy.network.webRTCMultipleRoutesEnabled.set({
            value: !items.rtcMultipleRoutes,
            scope: 'regular'
          });
        });
      }
      catch(e){
        console.log("Error: " + e.message);
      }
    });
  }
  else if(getMajorVerison() == 47){
    var nonProxiedUDP = document.getElementById('proxy').checked;
    var rtcMultipleRoutes = document.getElementById('multipleroutes').checked;
    chrome.storage.local.set({
      nonProxiedUDP: nonProxiedUDP,
      rtcMultipleRoutes: rtcMultipleRoutes
    }, function(){
      try{
        chrome.storage.local.get(null, function(items){
          chrome.privacy.network.webRTCMultipleRoutesEnabled.set({
            value: !items.rtcMultipleRoutes,
            scope: 'regular'
          });
          chrome.privacy.network.webRTCNonProxiedUdpEnabled.set({
            value: !items.nonProxiedUDP,
            scope: 'regular'
          });
        });
      }
      catch(e){
        console.log("Error: " + e.message);
      }
    });
  }
}

/* Function to restore options. */
function restoreOptions(){
  if(getMajorVerison() > 47){
    chrome.storage.local.get({
      rtcIPHandling: 'default_public_interface_only'
    }, function(items){
      document.getElementById('policy').value = items.rtcIPHandling;
    });
  }
  else if(getMajorVerison() > 41 && getMajorVerison() < 47){
    chrome.storage.local.get({
      rtcMultipleRoutes: true
    }, function(items){
      document.getElementById('multipleroutes').checked = items.rtcMultipleRoutes;
    });
  }
  else if(getMajorVerison() == 47){
    chrome.storage.local.get({
      nonProxiedUDP: false,
      rtcMultipleRoutes: true
    }, function(items){
      document.getElementById('proxy').checked = items.nonProxiedUDP;
      document.getElementById('multipleroutes').checked = items.rtcMultipleRoutes;
    });
  }
}

/* Event listeners. */
document.addEventListener('DOMContentLoaded', displayContent);
document.addEventListener('DOMContentLoaded', restoreOptions);
document.getElementById('policy').addEventListener('change', saveOptions);
document.getElementById('proxy').addEventListener('change', saveOptions);
document.getElementById('multipleroutes').addEventListener('change', saveOptions);