(function (context, $) {

  "use strict";

  context.JK = context.JK || {};
  context.JK.ProfileScreen = function (app) {
    var logger = context.JK.logger;
    var userId;
    var user = null;
    var userDefer = null;
    var rest = context.JK.Rest();
    var decrementedFriendCountOnce = false;
    var sentFriendRequest = false;
    var profileScreen = null;
    var textMessageDialog = null;
    var feed = null;

    var instrument_logo_map = context.JK.getInstrumentIconMap24();

    var proficiencyDescriptionMap = {
      "1": "BEGINNER",
      "2": "INTERMEDIATE",
      "3": "EXPERT"
    };

    var proficiencyCssMap = {
      "1": "proficiency-beginner",
      "2": "proficiency-intermediate",
      "3": "proficiency-expert"
    };

    function beforeShow(data) {
      userId = data.id;
      feed.setUser(userId);
    }

    function afterShow(data) {
      initUser();
      resetForm();
    }

    function beforeHide(data) {
      feed.setUser(null);
    }

    function resetForm() {
      $('#profile-instruments').empty();

      $('#profile-about').show();
      $('#profile-history').hide();
      $('#profile-bands').hide();
      $('#profile-social').hide();
      $('#profile-favorites').hide();

      $('.profile-nav a.active').removeClass('active');
      $('.profile-nav a#profile-about-link').addClass('active');
    }

    function initUser() {
      user = null;
      decrementedFriendCountOnce = false;
      sentFriendRequest = false;
      userDefer = rest.getUserDetail({id: userId})
        .done(function (response) {
          user = response;
          configureUserType();
          renderActive();
        })
        .fail(function (jqXHR) {
          if (jqXHR.status >= 500) {
            context.JK.fetchUserNetworkOrServerFailure();
          }
          else if (jqXHR.status == 404) {
            context.JK.entityNotFound("User");
          }
          else {
            app.ajaxError(arguments);
          }
        });
    }

    function isMusician() {
      return user.musician;
    }

    function isCurrentUser() {
      return userId === context.JK.currentUserId;
    }

    function configureUserType() {
      if (isMusician()) {
        $('#profile-history-link').show();
        $('#profile-bands-link').show();
        $('#profile-instruments').show();
        $('#profile-session-stats').show();
        $('#profile-recording-stats').show();
        // $('#profile-following-stats').hide();
        // $('#profile-favorites-stats').hide();
        $('.profile-social-left').show();
        $('#profile-type-label').text('musician');
        $('#profile-location-label').text('Location');
      }
      else {
        $('#profile-history-link').hide();
        $('#profile-bands-link').hide();
        $('#profile-instruments').hide();
        $('#profile-session-stats').hide();
        $('#profile-recording-stats').hide();
        // $('#profile-following-stats').show();
        // $('#profile-favorites-stats').show();
        $('.profile-social-left').hide();
        $('#profile-type-label').text('fan');
        $('#profile-location-label').text('Presence');
      }

      if (isCurrentUser()) {
        $('#btn-profile-edit').show();
        $('#btn-add-friend').hide();
        $('#btn-follow-user').hide();
        $('#btn-message-user').hide();
      }
      else {
        configureFriendFollowersControls();

        $('#btn-profile-edit').hide();
        $('#btn-add-friend').show();
        $('#btn-follow-user').show();
        $('#btn-message-user').show();
      }
    }

    function configureFriendFollowersControls() {
      // wire up Add Friend click
      configureFriendButton();

      // wire up Follow click
      configureFollowingButton();
    }

    /****************** MAIN PORTION OF SCREEN *****************/
      // events for main screen
    function events() {
      // wire up panel clicks -- these need to check deferred because they can't be hidden when in an invalid state
      $('#profile-about-link').click(function () {
        renderTabDeferred(renderAbout)
      });
      $('#profile-history-link').click(function () {
        renderTabDeferred(renderHistory)
      });
      $('#profile-bands-link').click(function () {
        renderTabDeferred(renderBands)
      });
      $('#profile-social-link').click(function () {
        renderTabDeferred(renderSocial)
      });
      $('#profile-favorites-link').click(function () {
        renderTabDeferred(renderFavorites)
      });

      // this doesn't need deferred because it's only shown when valid
      $('#btn-add-friend').click(handleFriendChange);
      $('#btn-follow-user').click(handleFollowingChange);
      $('#btn-message-user').click(handleMessageMusician);
    }

    function handleFriendChange(evt) {
      if (isFriend()) {
        removeFriend(evt);
      }
      else {
        sendFriendRequest(evt);
      }
      return false;
    }

    function handleFollowingChange(evt) {
      if (isFollowing()) {
        removeFollowing(false, userId);
      }
      else {
        addFollowing();
      }
      return false;
    }

    function handleMessageMusician(evt) {
      app.layout.showDialog('text-message', { d1: userId });
      return false;
    }

    function sendFriendRequest(evt) {
      evt.stopPropagation();
      setFriend(true); // TODO: you aren't a friend yet. just a request to be one really there are 3 states here.
      sentFriendRequest = true;
      rest.sendFriendRequest(app, userId, friendRequestCallback);
    }

    function removeFriend(evt) {
      evt.stopPropagation();

      rest.removeFriend({friend_id: userId})
        .done(function () {
          updateFriendCount(-1);
          setFriend(false);
          configureFriendButton();
        })
        .fail(app.ajaxError);
    }

    function isFriend() {
      return user.is_friend;
    }

    function setFriend(isFriend) {
      user.is_friend = isFriend;
    }

    function friendRequestCallback() {
      configureFriendButton();
    }

    function configureFriendButton() {
      if (isFriend()) {
        $('#btn-add-friend').text('DISCONNECT');
      }
      else {
        $('#btn-add-friend').text('CONNECT');
      }
    }

    function addFollowing() {

      rest.addFollowing({user_id: userId})
        .done(function () {
          updateFollowingCount(1);
          setFollowing(true);
          configureFollowingButton();
          context.JK.GA.trackJKSocial(context.JK.GA.Categories.jkFollow, isMusician() ? context.JK.GA.JKSocialTargets.musician : context.JK.GA.JKSocialTargets.fan);
        })
        .fail(app.ajaxError);
    }

    function removeFollowing(isBand, id) {
      rest.removeFollowing(id)
        .done(function () {
          if (!isBand) {
            updateFollowingCount(-1);
            setFollowing(false);
            configureFollowingButton();
          }
          else {
            updateBandFollowingCount(id, -1);  // refresh stats
            configureBandFollowingButton(false, id);
          }
        })
        .fail(app.ajaxError);
    }

    function isFollowing() {
      return user.is_following;
    }

    function setFollowing(isFollowing) {
      user.is_following = isFollowing;
    }

    function configureFollowingButton() {

      if (isFollowing()) {
        $('#btn-follow-user').text('UNFOLLOW');
      }
      else {
        $('#btn-follow-user').text('FOLLOW');
      }
    }

    function configureEditProfileButton() {
      $('#btn-follow-user').click(addFollowing);
    }

    // refreshes the currently active tab
    function renderActive() {
      if ($('#profile-about-link').hasClass('active')) {
        renderAbout();
      }
      else if ($('#profile-history-link').hasClass('active')) {
        renderHistory();
      }
      else if ($('#profile-bands-link').hasClass('active')) {
        renderBands();
      }
      else if ($('#profile-social-link').hasClass('active')) {
        renderSocial();
      }
      else if ($('#profile-favorites-link').hasClass('active')) {
        renderFavorites();
      }
    }

    function renderTabDeferred(tabRenderer) {
      userDefer
        .done(function () {
          tabRenderer();
        })
        .fail(function () {
          // try again
          initUser();
        })
    }

    /****************** ABOUT TAB *****************/
    function renderAbout() {
      $('#profile-instruments').empty();

      $('#profile-about').show();
      $('#profile-history').hide();
      $('#profile-bands').hide();
      $('#profile-social').hide();
      $('#profile-favorites').hide();

      $('.profile-nav a.active').removeClass('active');
      $('.profile-nav a#profile-about-link').addClass('active');

      bindAbout();
    }

    function bindAbout() {

      $('#profile-instruments').empty();

      // name
      $('#profile-username').html(user.name);

      // avatar
      $('#profile-avatar').attr('src', context.JK.resolveAvatarUrl(user.photo_url));

      // instruments
      if (user.instruments) {
        for (var i = 0; i < user.instruments.length; i++) {
          var instrument = user.instruments[i];
          var description = instrument.instrument_id;
          var proficiency = instrument.proficiency_level;
          var instrument_icon_url = context.JK.getInstrumentIcon256(description);

          // add instrument info to layout
          var template = $('#template-profile-instruments').html();
          var instrumentHtml = context.JK.fillTemplate(template, {
            instrument_logo_url: instrument_icon_url,
            instrument_description: description,
            proficiency_level: proficiencyDescriptionMap[proficiency],
            proficiency_level_css: proficiencyCssMap[proficiency]
          });

          $('#profile-instruments').append(instrumentHtml);
        }
      }

      // location
      $('#profile-location').html(user.location);

      // stats
      var text = user.friend_count > 1 || user.friend_count === 0 ? " Friends" : " Friend";
      $('#profile-friend-stats').html('<span class="friend-count">' + user.friend_count + '</span>' + text);

      text = user.follower_count > 1 || user.follower_count === 0 ? " Followers" : " Follower";
      $('#profile-follower-stats').html('<span class="follower-count">' + user.follower_count + '</span>' + text);

      if (isMusician()) {
        text = user.session_count > 1 || user.session_count === 0 ? " Sessions" : " Session";
        $('#profile-session-stats').html(user.session_count + text);

        text = user.recording_count > 1 || user.recording_count === 0 ? " Recordings" : " Recording";
        $('#profile-recording-stats').html(user.recording_count + text);
      } else {
        text = " Following";
        $('#profile-following-stats').html(user.following_count + text);
        text = user.favorite_count > 1 || user.favorite_count === 0 ? " Favorites" : " Favorite";
        $('#profile-favorite-stats').html(user.favorite_count + text);
      }

      renderBio();
    }

    /** The biography show/edit functionality */
    function renderBio() {


      function initializeBioVisibility() {

        $showBio.hide();
        $noBio.hide();
        $biographyEditor.hide();

        $bioTextArea.val(user.biography);

        if(user.biography) {

          $showBio.show();
          if(isCurrentUser()) {
            $editBiographyButton.show();
          }
          else {
            $editBiographyButton.hide();
          }
          $biographyText.text(user.biography).show();
        }
        else {
          if(isCurrentUser()) {
            $noBio.show();
          }
        }
      }

      var $bioTextArea            = $('.user-biography', profileScreen);
      var $showBio                = $('.have-bio', profileScreen);
      var $noBio                  = $('.no-bio', profileScreen);
      var $biographyEditor        = $('.update-biography', profileScreen);
      var $addBiographyButton     = $('a.enter-bio', profileScreen);
      var $editBiographyButton    = $('#profile-edit-biography', profileScreen);
      var $submitBiographyButton  = $('#btn-update-user-biography', profileScreen);
      var $cancelBiographyButton  = $('#btn-cancel-user-biography', profileScreen);
      var $biographyText          = $('#profile-biography', profileScreen);

      initializeBioVisibility();

      $addBiographyButton.unbind('click').click(function() {
        $biographyEditor.val(user.biography).show();
        return false;
      });

      $editBiographyButton.unbind('click').click(function() {
        $editBiographyButton.hide();
        $biographyText.hide();
        $bioTextArea.val(user.biography);
        $biographyEditor.show();
        return false;
      })

      $submitBiographyButton.unbind('click').click(function() {
        var bio = $bioTextArea.val();
        $bioTextArea.closest('div.field').removeClass('error');
        $('.error-text', $bioTextArea.closest('div.field')).remove();
        userDefer = rest.updateUser({
          biography: bio
        })
          .done(function(response) {
            user = response;
            initializeBioVisibility();
          })
          .fail(function(jqXHR) {
            if(jqXHR.status == 422) {
              var errors = JSON.parse(jqXHR.responseText)
              var biography = context.JK.format_errors("biography", errors);
              if(biography != null) {
                $bioTextArea.closest('div.field').addClass('error').end().after(biography);
              }
              else {
                app.notifyServerError(jqXHR, "Unable to update biography")
              }
            }
            else {
              app.notifyServerError(jqXHR, "Unable to update biography")
            }
          })
        return false;
      })

      $cancelBiographyButton.unbind('click').click(function() {
        initializeBioVisibility();
        return false;
      })
    }

    /****************** SOCIAL TAB *****************/
    function renderSocial() {
      $('#profile-social-friends').empty();
      $('#profile-social-followings').empty();
      $('#profile-social-followers').empty();

      $('#profile-about').hide();
      $('#profile-history').hide();
      $('#profile-bands').hide();
      $('#profile-social').show();
      $('#profile-favorites').hide();

      $('.profile-nav a.active').removeClass('active');
      $('.profile-nav a#profile-social-link').addClass('active');

      bindSocial();
    }

    function bindSocial() {
      if (isMusician()) {
        // FRIENDS
        rest.getFriends({id: userId})
          .done(function (response) {
            if (response && response.length > 0) {
              $.each(response, function (index, val) {
                var template = $('#template-profile-social').html();
                var friendHtml = context.JK.fillTemplate(template, {
                  userId: val.id,
                  hoverAttributeId: "user-id",
                  hoverAction: val.musician ? "musician" : "fan",
                  avatar_url: context.JK.resolveAvatarUrl(val.photo_url),
                  userName: val.name,
                  location: val.location,
                  type: "Friends"
                });

                $('#profile-social-friends').append(friendHtml);
              });
            }
            else {
              $('#profile-social-friends').html('&nbsp;');
            }
            context.JK.bindHoverEvents();
          })
          .fail(app.ajaxError)
      }

      rest.getFollowings({id: userId})
        .done(function (response) {
          if (response && response.length > 0) {
            $.each(response, function (index, val) {
              var template = $('#template-profile-social').html();
              var followingHtml = context.JK.fillTemplate(template, {
                userId: val.id,
                hoverAttributeId: val.type === "user" ? "user-id" : "band-id",
                hoverAction: val.type === "user" ? (val.musician ? "musician" : "fan") : "band",
                avatar_url: context.JK.resolveAvatarUrl(val.photo_url),
                userName: val.name,
                location: val.location
              });

              $('#profile-social-followings').append(followingHtml);
            });
          }
          else {
            $('#profile-social-followings').html('&nbsp;');
          }
          context.JK.bindHoverEvents();
        })
        .fail(app.ajaxError);

      rest.getFollowers({id: userId})
        .done(function (response) {
          $.each(response, function (index, val) {
            var template = $('#template-profile-social').html();
            var followerHtml = context.JK.fillTemplate(template, {
              userId: val.id,
              hoverAttributeId: "user-id",
              hoverAction: val.musician ? "musician" : "fan",
              avatar_url: context.JK.resolveAvatarUrl(val.photo_url),
              userName: val.name,
              location: val.location
            });

            $('#profile-social-followers').append(followerHtml);
          });
          context.JK.bindHoverEvents();
        })
        .fail(app.ajaxError);
    }

    /****************** HISTORY TAB *****************/
    function renderHistory() {
      $('#profile-about').hide();
      $('#profile-history').show();
      $('#profile-bands').hide();
      $('#profile-social').hide();
      $('#profile-favorites').hide();

      $('.profile-nav a.active').removeClass('active');
      $('.profile-nav a#profile-history-link').addClass('active');

      bindHistory();
    }

    function bindHistory() {
      feed.refresh();
    }

    /****************** BANDS TAB *****************/
    function renderBands() {
      $('#profile-bands').empty();

      $('#profile-about').hide();
      $('#profile-history').hide();
      $('#profile-bands').show();
      $('#profile-social').hide();
      $('#profile-favorites').hide();

      $('.profile-nav a.active').removeClass('active');
      $('.profile-nav a#profile-bands-link').addClass('active');

      bindBands();
    }

    function bindBands() {

      rest.getBands({id: userId})
        .done(function (response) {
          if ((!response || response.length === 0) && isCurrentUser()) {
            var noBandHtml = $('#template-no-bands').html();
            $("#profile-bands").html(noBandHtml);
          }
          else {
            addMoreBandsLink();

            $.each(response, function (index, val) {

              // build band member HTML
              var musicianHtml = '';
              if (val.musicians) {
                for (var i = 0; i < val.musicians.length; i++) {
                  var musician = val.musicians[i];
                  var instrumentLogoHtml = '';
                  if (musician.instruments) {
                    for (var j = 0; j < musician.instruments.length; j++) {
                      var instrument = musician.instruments[j];
                      var inst = '/assets/content/icon_instrument_default24.png';
                      if (instrument.instrument_id in instrument_logo_map) {
                        inst = instrument_logo_map[instrument.instrument_id].asset;
                      }
                      instrumentLogoHtml += '<img src="' + inst + '" width="24" height="24" />&nbsp;';
                    }
                  }
                  // this template is in _findSession.html.erb
                  var musicianTemplate = $('#template-musician-info').html();
                  musicianHtml += context.JK.fillTemplate(musicianTemplate, {
                    userId: musician.id,
                    avatar_url: context.JK.resolveAvatarUrl(musician.photo_url),
                    profile_url: "/client#/profile/" + musician.id,
                    musician_name: musician.name,
                    instruments: instrumentLogoHtml
                  });
                }
              }
              var template = $('#template-profile-bands').html();
              var bandHtml = context.JK.fillTemplate(template, {
                bandId: val.id,
                biography: val.biography,
                band_url: "/client#/bandProfile/" + val.id,
                avatar_url: context.JK.resolveBandAvatarUrl(val.photo_url),
                name: val.name,
                location: val.location,
                genres: formatGenres(val.genres),
                follower_count: val.follower_count,
                recording_count: val.recording_count,
                session_count: val.session_count,
                musicians: musicianHtml
              });

              $('#profile-bands').append(bandHtml);

              // wire up Band Follow button click handler
              configureBandFollowingButton(val.is_following, val.id);
            });

            if (response.length >= 3) {
              addMoreBandsLink();
            }
          }
          context.JK.bindHoverEvents();
        })
        .fail(app.ajaxError);
    }

    function addMoreBandsLink() {
      if (isCurrentUser()) {
        var moreBandsHtml = $('#template-more-bands').html();
        $("#profile-bands").append(moreBandsHtml);
      }
    }

    function formatGenres(genres) {
      var formattedGenres = '';
      if (genres) {
        for (var i = 0; i < genres.length; i++) {
          var genre = genres[i];
          formattedGenres += genre.description;
          if (i < genres.length - 1) {
            formattedGenres += ', ';
          }
        }
      }
      return formattedGenres;
    }

    function updateFriendCount(value) {
      if (!decrementedFriendCountOnce && !sentFriendRequest) {
        decrementedFriendCountOnce = true;
        var friendCount = $('#profile-friend-stats span.friend-count');
        friendCount.text(value + parseInt(friendCount.text()));
      }
    }

    function updateFollowingCount(value) {
      var followingCount = $('#profile-follower-stats span.follower-count');
      followingCount.text(value + parseInt(followingCount.text()));
    }

    function updateBandFollowingCount(bandId, value) {
      var bandFollowing = $('div[band-id="' + bandId + '"].profile-bands span.follower-count');
      bandFollowing.text(value + parseInt(bandFollowing.text()));
    }

    function addBandFollowing(evt) {
      evt.stopPropagation();
      var bandId = $(this).parent().parent().parent().parent().attr('band-id');

      var newFollowing = {};
      newFollowing.band_id = bandId;

      rest.addFollowing(newFollowing)
        .done(function (response) {
          logger.debug("following band " + bandId);
          updateBandFollowingCount(bandId, 1); // increase counter
          configureBandFollowingButton(true, bandId);
          context.JK.GA.trackJKSocial(context.JK.GA.Categories.jkFollow, context.JK.GA.JKSocialTargets.band);
        })
        .fail(app.ajaxError);
    }

    function configureBandFollowingButton(following, bandId) {
      var $btnFollowBand = $('div[band-id=' + bandId + ']', '#profile-bands').find('#btn-follow-band-2');
      $btnFollowBand.unbind("click");

      if (following) {
        $btnFollowBand.text('UNFOLLOW');
        $btnFollowBand.click(function (evt) {
          removeFollowing(true, bandId);
          evt.stopPropagation();
          return false;
        });
      }
      else {
        $btnFollowBand.text('FOLLOW');
        $btnFollowBand.click(addBandFollowing);
      }
    }

    /****************** FAVORITES TAB *****************/
    function renderFavorites() {
      $('#profile-about').hide();
      $('#profile-history').hide();
      $('#profile-bands').hide();
      $('#profile-social').hide();
      $('#profile-favorites').show();

      $('.profile-nav a.active').removeClass('active');
      $('.profile-nav a#profile-favorites-link').addClass('active');

      bindFavorites();
    }


    function bindFavorites() {
    }

    function initializeFeed() {

      var $scroller = profileScreen.find('.content-body-scroller');
      var $content = profileScreen.find('.feed-content');
      var $noMoreFeeds = $('#end-of-feeds-list');
      var $refresh = profileScreen.find('.btn-refresh-entries');
      var $sortFeedBy = profileScreen.find('#feed_order_by');
      var $includeDate = profileScreen.find('#feed_date');
      var $includeType = profileScreen.find('#feed_show');

      feed = new context.JK.Feed(app);
      feed.initialize(profileScreen, $scroller, $content, $noMoreFeeds, $refresh, $sortFeedBy, $includeDate, $includeType);
    }

    function initialize(textMessageDialogInstance) {
      textMessageDialog = textMessageDialogInstance;
      var screenBindings = {
        'beforeShow': beforeShow,
        'afterShow': afterShow,
        'beforeHide' : beforeHide
      };
      app.bindScreen('profile', screenBindings);
      profileScreen = $('#user-profile');
      events();
      initializeFeed();
    }

    this.initialize = initialize;
    this.beforeShow = beforeShow;
    this.afterShow = afterShow;
    return this;
  };

})(window, jQuery);