;(function($) {
'use strict';

	$.Browser = {
		defaults: {
			title:             'Choose Directory (or enter manually)',
			url:               sbRoot + '/browser/',
			autocompleteURL:   sbRoot + '/browser/complete',
			includeFiles:      0,
			showBrowseButton:  !0
		}
	};

	var fileBrowserDialog, currentBrowserPath, currentRequest = null;

	function browse(path, endpoint, includeFiles) {

		if (path === currentBrowserPath) {
			return;
		}

		currentBrowserPath = path;

		if (currentRequest) {
			currentRequest.abort();
		}

		fileBrowserDialog.dialog('option', 'dialogClass', 'browserDialog busy');

		currentRequest = $.getJSON(endpoint, {path: path, includeFiles: includeFiles}, function(data){
			fileBrowserDialog.empty();
			var firstVal = data[0], i = 0, list, link = null;
			data = $.grep(data, function(){
				return i++ != 0;
			});
			$('<input type="text" class="form-control input-sm">')
				.val(firstVal.currentPath)
				.on('keypress', function(e){
					if (13 === e.which) {
						browse(e.target.value, endpoint, includeFiles);
					}
				})
				.appendTo(fileBrowserDialog)
				.fileBrowser({showBrowseButton: !1})
				.on('autocompleteselect',
					function(e, ui){browse(ui.item.value, endpoint, includeFiles);
				});

			list = $('<ul>').appendTo(fileBrowserDialog);
			$.each(data, function(i, entry){
				link = $('<a href="javascript:void(0)">').on('click',
					function(){
						if (entry.isFile) {
							currentBrowserPath = entry.path;
							$('.browserDialog .ui-button:contains("Ok")').click();
						} else {
							browse(entry.path, endpoint, includeFiles);
						}
					}).text(entry.name);

				if (entry.isFile) {
					link.prepend('<span class="ui-icon ui-icon-blank"></span>');
				} else {
					link.prepend('<span class="ui-icon ui-icon-folder-collapsed"></span>')
						.on('mouseenter', function(){$('span', this).addClass('ui-icon-folder-open');})
						.on('mouseleave', function(){$('span', this).removeClass('ui-icon-folder-open');});
				}
				link.appendTo(list);
			});
			$('a', list).wrap('<li class="ui-state-default ui-corner-all">');
			fileBrowserDialog.dialog('option', 'dialogClass', 'browserDialog');
		});
	}

	$.fn.nFileBrowser = function(callback, options){
		options = $.extend({}, $.Browser.defaults, options);

		// make a fileBrowserDialog object if one doesn't exist already
		if (fileBrowserDialog) {
			fileBrowserDialog.dialog('option', 'title', options.title);
		} else {
			// set up the jquery dialog
			var docWidth = $(document).width(), dlgWidth = Math.min(docWidth - 80, 650),
				docHeight = $(document).height() - 80, winHeight = $(window).height() - 80;
			fileBrowserDialog = $('<div id="fileBrowserDialog" style="display:none"></div>').appendTo('body').dialog({
				dialogClass: 'browserDialog',
				title:       options.title,
				position:    [(docWidth - dlgWidth)/2, 60],
				minWidth:    dlgWidth,
				height:      Math.min(docHeight, winHeight),
				maxHeight:   Math.min(docHeight, winHeight),
				maxWidth:    docWidth - 80,
				modal:       true,
				autoOpen:    false
			});
		}

		fileBrowserDialog.dialog('option', 'buttons',
			[{
				text: 'Ok',
				'class': 'btn',
				click: function(){
					// store the browsed path to the associated text field
					callback(currentBrowserPath, options);
					$(this).dialog('close');
				}
			},
			{
				text: 'Cancel',
				'class': 'btn',
				click: function(){
					$(this).dialog('close');
				}
			}]);

		// set up the browser and launch the dialog
		var initialDir = '';
		if (options.initialDir) {
			initialDir = options.initialDir;
		}

		browse(initialDir, options.url, options.includeFiles);
		fileBrowserDialog.dialog('open');

		return false;
	};

	$.fn.fileBrowser = function(options){
		options = $.extend({}, $.Browser.defaults, options);
		// text field used for the result
		options.field = $(this);

		if (options.field.autocomplete && options.autocompleteURL) {
			var query = '';
			options.field.autocomplete({
				position: {my: 'top', at: 'bottom', collision: 'flipfit'},
				source: function(request, response){
					//keep track of user submitted search term
					query = $.ui.autocomplete.escapeRegex(request.term, options.includeFiles);
					$.ajax({
						url: options.autocompleteURL,
						data: request,
						dataType: 'json',
						success: function(data){
							//implement a startsWith filter for the results
							var matcher = new RegExp('^' + query, 'i');
							var a = $.grep(data, function(item){
								return matcher.test(item);
							});
							response(a);
						}
					});
				},
				open: function(){
					$('.ui-autocomplete li.ui-menu-item a').removeClass('ui-corner-all');
					$('.ui-autocomplete li.ui-menu-item:odd a').addClass('ui-menu-item-alternate');
				}
			}).data('ui-autocomplete')._renderItem = function(ul, item){
				//highlight the matched search term from the item -- note that this is global and will match anywhere
				var resultItem = item.label;
				var x = new RegExp('(?![^&;]+;)(?!<[^<>]*)(' + query + ')(?![^<>]*>)(?![^&;]+;)', 'gi');
				resultItem = resultItem.replace(x, function(fullMatch){
					return '<b>' + fullMatch + '</b>';
				});
				return $('<li></li>')
					.data('ui-autocomplete-item', item)
					.append('<a class="nowrap">' + resultItem + '</a>')
					.appendTo(ul);
			};
		}

		var path, callback, ls = false;
		// if empty text field and given a key then populate it with the last browsed value from localStorage
		try { ls = !!(localStorage.getItem); } catch (e) {}
		if (ls && options.key) {
			path = localStorage['fileBrowser-' + options.key];
		}
		if (options.key && options.field.val().length == 0 && (path)) {
			options.field.val(path);
		}

		callback = function(path, options){
			// store the browsed path to the associated text field
			options.field.val(path);

			// use a localStorage to remember for next time -- no ie6/7
			if (ls && options.key) {
				localStorage['fileBrowser-' + options.key] = path;
			}
		};


		options.field.addClass('fileBrowserField');
		if (options.showBrowseButton) {
			// append the browse button and give it a click behaviour
			options.field.after(
				$('<input type="button" value="Browse&hellip;" class="btn btn-inline fileBrowser">').on('click',
					function(){
						$(this).nFileBrowser(callback, $.extend(
							{}, options, {initialDir: options.field.val() || (options.key && path) || ''}
						));
						return false;
					}));
		}
		return options.field;
	};

})(jQuery);