(function() {
  var dialog, promise, transferred;

  _.extend(scrivito, {
    task_list_dialog: {
      open: function() {
        promise = $.Deferred();
        transferred = [];
        dialog = $(scrivito.template.render('task_list_dialog')).appendTo($('#scrivito_editing'));

        load_task_list();

        scrivito.dialog.open_and_adjust_without_transition(dialog);
        return scrivito.withDialogBehaviour(dialog, promise, {escape: close});
      }
    }
  });

  var fetch_task_list = function(mode) {
    var base_url = window.location.protocol + '//' + window.location.host + '/__scrivito/';
    var path = 'tasks';

    // the other option is 'all'
    mode = mode || 'user';

    return $.ajax(base_url + path, {
      type: 'GET',
      data: {mode: mode},
      dataType: 'json',
      cache: false
    });
  };

  var load_task_list = function(mode) {
    var objs;

    render(mode);

    fetch_task_list(mode).then(function(result, text_status, xhr) {
      var tasks = result.tasks;

      _.each(tasks, function(task) {
        task.obj_data = task.obj;
        task.obj = scrivito.legacy_obj.create_instance(task.obj);
        task.last_changed = string_date_to_function(task.last_changed);
      });

      render(mode, tasks);
    });
  };

  var string_date_to_function = function(string_date) {
    return function() {
      return scrivito.types.deserializeAsDate(string_date);
    };
  };

  var render = function(mode, tasks) {
    mode = mode || 'user';

    dialog.html(scrivito.template.render('task_list_dialog/content', {
      title: scrivito.t('task_list_dialog.title.' + mode),
      tasks: tasks,
      is_loaded: !!tasks,
      mode_button: scrivito.t('task_list_dialog.mode_toggle.' + mode)
    }));

    // on click go to page
    dialog.find('[data-scrivito-obj-id]').on('click', function() {
      var obj_id = $(this).attr('data-scrivito-obj-id');
      var task = _.find(tasks || [], function(task) { return task.obj.id() === obj_id; });
      scrivito.open_obj(task.obj);
      return false;
    });

    scrivito.updateAutoHeightFor(dialog.find('.scrivito_changes_dialog_content'));

    dialog.find('.scrivito_cancel').on('click', close);

    // TODO: sortable

    // TODO: my/all changes
    // mine/all changes toggle
    dialog.find('.fiona7_toggle_task_list_type').on('click', function() {

      if (mode == 'all') {
        load_task_list('user');
      } else {
        load_task_list('all');
      }
    });
  };

  var close = function() {
    scrivito.dialog.close_without_transition(dialog);
    promise.resolve(transferred);
    return false;
  };

}());