Accounts.onCreateUser(function(options, user){
  var userProperties = {
    profile: options.profile || {},
    karma: 0,
    isInvited: false,
    isAdmin: false,
    postCount: 0,
    commentCount: 0,
    invitedCount: 0,
    votes: {
      upvotedPosts: [],
      downvotedPosts: [],
      upvotedComments: [],
      downvotedComments: []
    }
  };
  user = _.extend(user, userProperties);

  if (options.email)
    user.profile.email = options.email;
    
  if (getEmail(user))
    user.email_hash = getEmailHash(user);
  
  if (!user.profile.name)
    user.profile.name = user.username;
  
  // set notifications default preferences
  user.profile.notifications = {
    users: false,
    posts: false,
    comments: true,
    replies: true
  };

  // create slug from username
  user.slug = slugify(getUserName(user));

  // if this is the first user ever, make them an admin
  if (!Meteor.users.find().count() )
    user.isAdmin = true;

  // give new users a few invites (default to 3)
  user.inviteCount = getSetting('startInvitesCount', 3);

  trackEvent('new user', {username: user.username, email: user.profile.email});

  // if user has already filled in their email, add them to MailChimp list
  // if(user.profile.email)
  //   addToMailChimpList(user, false, function(error, result){
  //     if(error){
  //       console.log(error)
  //     }
  //   });

  // if the new user has been invited 
  // set her status accordingly and update invitation info
  if(invitesEnabled() && user.profile.email){
    var invite = Invites.findOne({ invitedUserEmail : user.profile.email });
    if(invite){
      var invitedBy = Meteor.users.findOne({ _id : invite.invitingUserId });
      
      user = _.extend(user, {
        isInvited: true,
        invitedBy: invitedBy._id,
        invitedByName: getDisplayName(invitedBy)
      });

      Invites.update(invite._id, {$set : {
        accepted : true
      }});
    }
  }

  // send notifications to admins
  var admins = Meteor.users.find({isAdmin: true});
  admins.forEach(function(admin){
    if(getUserSetting('notifications.users', false, admin)){
      var emailProperties = {
        profileUrl: getProfileUrl(user),
        username: getUserName(user)
      }
      var html = getEmailTemplate('emailNewUser')(emailProperties);
      sendEmail(getEmail(admin), 'New user account: '+getUserName(user), buildEmailTemplate(html));
    }
  });

  return user;
});

getEmailHash = function(user){
  // todo: add some kind of salt in here
  return CryptoJS.MD5(getEmail(user).trim().toLowerCase() + user.createdAt).toString();
};

Meteor.methods({
  changeEmail: function(newEmail) {
    Meteor.users.update(Meteor.userId(), {$set: {emails: [{address: newEmail}]}});
  },
  numberOfPostsToday: function(){
    console.log(numberOfItemsInPast24Hours(Meteor.user(), Posts));
  },
  numberOfCommentsToday: function(){
    console.log(numberOfItemsInPast24Hours(Meteor.user(), Comments));
  },
  testBuffer: function(){
    // TODO
  },
  getScoreDiff: function(id){
    var object = Posts.findOne(id);
    var baseScore = object.baseScore;
    var ageInHours = (new Date().getTime() - object.submitted) / (60 * 60 * 1000);
    var newScore = baseScore / Math.pow(ageInHours + 2, 1.3);
    return Math.abs(object.score - newScore);
  },
  setEmailHash: function(user){
    var email_hash = CryptoJS.MD5(getEmail(user).trim().toLowerCase()).toString();
    Meteor.users.update(user._id, {$set : {email_hash : email_hash}});
  }
});