/* RainLoop Webmail (c) RainLoop Team | Licensed under CC BY-NC-SA 3.0 */

/**
 * @constructor
 * @extends KnoinAbstractViewModel
 */
function PopupsKeyboardShortcutsHelpViewModel()
{
	KnoinAbstractViewModel.call(this, 'Popups', 'PopupsKeyboardShortcutsHelp');

	this.sDefaultKeyScope = Enums.KeyState.PopupKeyboardShortcutsHelp;

	Knoin.constructorEnd(this);
}

Utils.extendAsViewModel('PopupsKeyboardShortcutsHelpViewModel', PopupsKeyboardShortcutsHelpViewModel);

PopupsKeyboardShortcutsHelpViewModel.prototype.onBuild = function (oDom)
{
	key('tab, shift+tab, left, right', Enums.KeyState.PopupKeyboardShortcutsHelp, _.bind(function (event, handler) {
		if (event && handler)
		{
			var
				$tabs = oDom.find('.nav.nav-tabs > li'),
				bNext = handler && ('tab' === handler.shortcut || 'right' === handler.shortcut),
				iIndex = $tabs.index($tabs.filter('.active'))
			;

			if (!bNext && iIndex > 0)
			{
				iIndex--;
			}
			else if (bNext && iIndex < $tabs.length - 1)
			{
				iIndex++;
			}
			else
			{
				iIndex = bNext ? 0 : $tabs.length - 1;
			}

			$tabs.eq(iIndex).find('a[data-toggle="tab"]').tab('show');
			return false;
		}
	}, this));
};