var SmartAnnotation = (function() {
  'use strict';

  // utilities
  var Util = (function() {
    // helper method that binds show/hidden action
    function showHideBinding() {
      $.each(['show', 'hide'], function (i, ev) {
        var el = $.fn[ev];
        $.fn[ev] = function () {
          this.trigger(ev);
          return el.apply(this, arguments);
        };
      });
    }

    var publicApi = {
      showHideBinding: showHideBinding
    };

    return publicApi;
  })();

  // stop the user annotation popover on click propagation
  function atwhoStopPropagation(element) {
    $(element).on('click', function(e) {
      e.stopPropagation();
      e.preventDefault();
    });
  }

  function setAtWho(field) {
    var FilterTypeEnum = Object.freeze({
      USER:       {tag: "users",
                   dataUrl: $(document.body).attr('data-atwho-users-url')},
      TASK:       {tag: "sa-tasks",
                   dataUrl: $(document.body).attr('data-atwho-task-url')},
      PROJECT:    {tag: "sa-projects",
                   dataUrl: $(document.body).attr('data-atwho-project-url')},
      EXPERIMENT: {tag: "sa-experiments",
                   dataUrl: $(document.body).attr('data-atwho-experiment-url')},
      REPOSITORY: {tag: "sa-repositories",
                   dataUrl: $(document.body).attr('data-atwho-rep-items-url')},
      MENU:       {tag: "menu",
                   dataUrl: $(document.body).attr('data-atwho-menu-items')}
    });
    var prevAt,
        // Default selected filter when using '#'
        DEFAULT_SEARCH_FILTER = FilterTypeEnum.REPOSITORY,
        atWhoUpdating = false;

    function _matchHighlighter(html, query, filterType) {
      var $html = $(html);
      var $li_text = $html.find('.item-text');

      if ($li_text.length === 0 || !query) return html;

      $.each($li_text, function(i, item) {
        $(item).html($(item).text().replace(new RegExp(query, 'gi'), '<span class="atwho-highlight">$&</span>'));
      })

      return $html;
    }

    function _generateInputTag(value, li) {
      return `[#${li.attr('data-name')}~${li.attr('data-type')}~${li.attr('data-id')}]`;
    }

    // Generates suggestion dropdown filter
    function generateFilterMenu(active, res_data) {
      var menu = '';
      $.ajax({
        async: false,
        dataType: 'json',
        url: $(document.body).attr('data-atwho-repositories-url'),
        success: function(data) {
          menu = data.html
       }
      });
      return menu;
    }

    function atWhoSettings(at, defaultFilterType) {
      return {
        at: at,
        callbacks: {
          remoteFilter: function(query, callback) {
            var $currentAtWho = $('#' + $(field).data('smart-annotation'));
            var filterType;
            var params = { query: query };
            filterType = FilterTypeEnum[$currentAtWho.find('.tab-pane.active').data('object-type')]
            if (!filterType) {
              callback([{name: ''}]);
              return false
            }

            if(filterType.tag === 'sa-repositories') {
              let repositoryTab = $currentAtWho.find('[data-object-type="REPOSITORY"]')
              let activeRepository = repositoryTab.find('.btn-primary');
              if (activeRepository.length) {
                params['repository_id'] =  activeRepository.data('object-id')
              }

            }
            $.getJSON(filterType.dataUrl, params, function(data) {

              localStorage.setItem('smart_annotation_state_per_team/' + data.team, JSON.stringify({
                tag: filterType.tag,
                repository: data.repository
              }));
              callback(data.res);

              if (data.repository) {
                $currentAtWho.find(`.repository-object[data-object-id="${data.repository}"]`)
                  .addClass('btn-primary').removeClass('btn-light')
              }
            });
          },
          tplEval: function(_tpl, items) {
            return items.name;
          },
          highlighter:  function(li, query) {
            return _matchHighlighter(li, query, true);
            return li;
          },
          beforeInsert: function(value, li) {
            return _generateInputTag(value, li);
          },
          matcher:function(flag, subtext, should_startWithSpace, acceptSpaceBar) {
            var _a, _y, match, regexp, space;
            flag = flag.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
            if (should_startWithSpace) {
              flag = '(?:^|\\s)' + flag;
            }
            _a = decodeURI("%C3%80");
            _y = decodeURI("%C3%BF");
            regexp = new RegExp(flag + "([A-Za-z" + _a + "-" + _y + "0-9_/:\\s\+\-\]*)$|" + flag + "([^\\x00-\\xff]*)$", 'gi');
            match = regexp.exec(subtext);
            if (match) {
              return match[2] || match[1];
            } else {
              return null;
            }
          },
        },
        headerTpl: generateFilterMenu(defaultFilterType),
        limit: <%= Constants::ATWHO_SEARCH_LIMIT %>,
        startWithSpace: true,
        acceptSpaceBar: true,
        displayTimeout: 120000
      }
    }

    function init() {
      $(field)
      .on("shown.atwho", function() {
        var $currentAtWho = $('.atwho-view[style]:not(.old)');
        $currentAtWho.addClass('old');
        $(field).data('smart-annotation', $currentAtWho.attr('id'));
        $currentAtWho.find('.tab-button').off().on('shown.bs.tab',  function() {
          $(field).click().focus();
          $(this).closest('.nav-tabs').find('.tab-button').removeClass('active');
          $(this).addClass('active');
        })
        $currentAtWho.find('.repository-object').off().on('click',  function() {
          $(this).parent().find('.repository-object').removeClass('btn-primary').addClass('btn-light');
          $(this).addClass('btn-primary').removeClass('btn-light');
          $(field).click().focus();
        })

        if ($currentAtWho.find('.tab-pane.active').length == 0) {
          let filterType =  DEFAULT_SEARCH_FILTER.tag;
          let teamId = $currentAtWho.find('.atwho-header-res').data('team-id');
          let remeberedState = localStorage.getItem('smart_annotation_state_per_team/' + teamId);
          if (remeberedState) {
            remeberedState = JSON.parse(remeberedState);
            filterType = remeberedState.tag;
            $currentAtWho.find(`.repository-object[data-object-id=${remeberedState.repository}]`)
              .addClass('btn-primary');
          }
          $currentAtWho.find(`.${filterType}`).click();
        }
      })
      .on("reposition.atwho", function(event, flag, query) {
        let inputFieldLeft = query.$inputor.offset().left;
        if (inputFieldLeft > $(window).width()) {
          let leftPosition;
          if (inputFieldLeft < flag.left + $(window).scrollLeft()) {
            leftPosition = inputFieldLeft;
          } else {
            leftPosition = flag.left + $(window).scrollLeft();
          }
          query.$el.find('.atwho-view').css('left', leftPosition + 'px');
        }
        if ($('.repository-show').length) {
          query.$el.find('.atwho-view').css('top', flag.top + 'px');
        }
      })
      .atwho({
        at: '@',
        callbacks: {
          remoteFilter: function(query, callback) {
            $.getJSON(
              FilterTypeEnum.USER.dataUrl,
              {query: query},
              function(data) {
                if (data.users.length < 1) {
                  callback([{no_results: 1}]);
                } else {
                  callback(data.users);
                }
                initDismissButton($('.atwho-view[style]'));
              }
            );
          },
          sorter: function(query, items, _searchKey) {
            // Sorting is already done on server-side
            return items;
          },
          tplEval: function(_tpl, map) {
            var res;
            try {
              if (map.no_results) {
                res = '';
              } else {
                res = '';
                res += '<li class="atwho-li atwho-li-user" ';
                res += 'data-id="' + map.id + '" ';
                res += 'data-full-name="' + map.full_name + '">';
                res += '<span class="global-avatar-container"><img src="' + map.img_url + '" class="avatar" /></span>';
                res += '<span data-val="full-name">';
                res += map.full_name;
                res += '</span>';
                res += '<small>';
                res += '&nbsp;';
                res += '&#183;';
                res += '&nbsp;';
                res += '<span data-val="email">';
                res += map.email;
                res += '</span>';
                res += '</small>';
                res += '</li>';
              }
            } catch (_error) {
              res = '';
            }
            return res;
          },
          highlighter: function(li, query) {
            return li;//_matchHighlighter(li, query);
          },
          beforeInsert: function(value, li) {
            var res = '';
            res += '[@' + li.attr('data-full-name');
            res += '~' + li.attr('data-id') + ']';
            return res;
          }
        },
        headerTpl:
          '<div class="atwho-header-res">' +
          '<div class="title-user"><%= I18n.t("atwho.users.title") %></div>' +
          '<div class="help">' +
          '<div>' +
          '<strong><%= I18n.t("atwho.users.navigate_1") %></strong> ' +
          '<%= I18n.t("atwho.users.navigate_2") %>' +
          '</div>' +
          '<div>' +
          '<strong><%= I18n.t("atwho.users.confirm_1") %></strong> ' +
          '<%= I18n.t("atwho.users.confirm_2") %>' +
          '</div>' +
          '<div>' +
          '<strong><%= I18n.t("atwho.users.dismiss_1") %></strong> ' +
          '<%= I18n.t("atwho.users.dismiss_2") %>' +
          '</div>' +
          '</div>' +
          '<div class="dismiss">' +
          '<span class="fas fa-times"></span>' +
          '</div>' +
          '</div>',
        limit: <%= Constants::ATWHO_SEARCH_LIMIT %>,
        startsWithSpace: true,
        acceptSpaceBar: true,
        displayTimeout: 120000
      })
      .atwho(atWhoSettings('#', DEFAULT_SEARCH_FILTER))
      // .atwho(atWhoSettings('task#', FilterTypeEnum.TASK))   Waiting for better times
      // .atwho(atWhoSettings('project#', FilterTypeEnum.PROJECT))
      // .atwho(atWhoSettings('experiment#', FilterTypeEnum.EXPERIMENT))
      // .atwho(atWhoSettings('sample#', FilterTypeEnum.REPOSITORY));
    }

    return {
      init: init
    };
  }
  // Closes the atwho popup * needed in repositories to close the popup
  // if nothing is selected and the user leaves the form *
  function closePopup() {
    $('.atwho-header-res').find('.fa-times').click();
  }

  function initialize(field) {
    var atWho = new setAtWho(field);
    atWho.init();
  }

  var publicApi = Object.freeze({
    init: initialize,
    preventPropagation: atwhoStopPropagation,
    closePopup: closePopup
  });

  return publicApi;

})();


// initialize the smart annotations
(function initSmartAnnotation() {
  $(document).on('focus', '[data-atwho-edit]', function() {
    if(_.isUndefined($(this).data('atwho'))) {
      SmartAnnotation.init(this);
    }
  });
})();