(function($) {
	$.widget('blueimpUIX.fileupload', $.blueimpUI.fileupload, {
		_initTemplates: function() {
					this.options.templateContainer = document.createElement(
							this._files.prop('nodeName')
					);
					this.options.uploadTemplate = window.tmpl(this.options.uploadTemplateName);
					this.options.downloadTemplate = window.tmpl(this.options.downloadTemplateName);
			},
		_enableFileInputButton: function() {
			$.blueimpUI.fileupload.prototype._enableFileInputButton.call(this);
			this.element.find('.ss-uploadfield-addfile').show();
		},
		_disableFileInputButton: function() {
			$.blueimpUI.fileupload.prototype._disableFileInputButton.call(this);
			this.element.find('.ss-uploadfield-addfile').hide();
		},
		_onAdd: function(e, data) {
			// use _onAdd instead of add since we only want it called once for a file set, not for each file
			var result = $.blueimpUI.fileupload.prototype._onAdd.call(this, e, data);
			var firstNewFile = this._files.find('.ss-uploadfield-item').slice(data.files.length*-1).first();
			var top = '+=' + (firstNewFile.position().top - parseInt(firstNewFile.css('marginTop')) || 0 - parseInt(firstNewFile.css('borderTopWidth')) || 0);
			firstNewFile.offsetParent().animate({scrollTop: top}, 1000);
			return result;
		}
	});
	$.entwine('ss', function($) {
		$('div.ss-upload').entwine({

			Config: null,

			onmatch: function() {
				if(this.is('.readonly,.disabled')) return;

				var fileInput = this.find('input');
				var dropZone = this.find('.ss-uploadfield-dropzone');
				var config = $.parseJSON(fileInput.data('config').replace(/'/g,'"'));

				this.setConfig(config);
				this.fileupload($.extend(true, 
					{
						formData: function(form) {
							return [
								{name: 'SecurityID', value: $(form).find(':input[name=SecurityID]').val()},
								{name: 'ID', value: $(form).find(':input[name=ID]').val()}
							];
						},
						errorMessages: {
							// errorMessages for all error codes suggested from the plugin author, some will be overwritten by the config comming from php
							1: ss.i18n._t('UploadField.PHP_MAXFILESIZE'),
							2: ss.i18n._t('UploadField.HTML_MAXFILESIZE'),
							3: ss.i18n._t('UploadField.ONLYPARTIALUPLOADED'),
							4: ss.i18n._t('UploadField.NOFILEUPLOADED'),
							5: ss.i18n._t('UploadField.NOTMPFOLDER'),
							6: ss.i18n._t('UploadField.WRITEFAILED'),
							7: ss.i18n._t('UploadField.STOPEDBYEXTENSION'),
							maxFileSize: ss.i18n._t('UploadField.TOOLARGE'),
							minFileSize: ss.i18n._t('UploadField.TOOSMALL'),
							acceptFileTypes: ss.i18n._t('UploadField.INVALIDEXTENSION'),
							maxNumberOfFiles: ss.i18n._t('UploadField.MAXNUMBEROFFILESSIMPLE'),
							uploadedBytes: ss.i18n._t('UploadField.UPLOADEDBYTES'),
							emptyResult: ss.i18n._t('UploadField.EMPTYRESULT')
						},
						send: function(e, data) {
								if (data.context && data.dataType && data.dataType.substr(0, 6) === 'iframe') {
										// Iframe Transport does not support progress events.
										// In lack of an indeterminate progress bar, we set
										// the progress to 100%, showing the full animated bar:
										data.total = 1;
										data.loaded = 1;
										$(this).data('fileupload').options.progress(e, data);
								}
						},
						progress: function(e, data) {
									if (data.context) {
										var value = parseInt(data.loaded / data.total * 100, 10) + '%';
										data.context.find('.ss-uploadfield-item-status').html((data.total == 1)?ss.i18n._t('UploadField.LOADING'):value);
											data.context.find('.ss-uploadfield-item-progressbarvalue').css('width', value);
									}
							}
					}, 
					config, 
					{
						fileInput: fileInput,
						dropZone: dropZone,
						previewAsCanvas: false,
						acceptFileTypes: new RegExp(config.acceptFileTypes, 'i')
					}
				));
				if (this.data('fileupload')._isXHRUpload({multipart: true})) {
					$('.ss-uploadfield-item-uploador').show();
					dropZone.show(); // drag&drop avaliable
				}
				this._super();
			},

			openSelectDialog: function() {
				// Create dialog and load iframe
				var self = this, config = this.getConfig(), dialogId = 'ss-uploadfield-dialog-' + this.attr('id'), dialog = jQuery('#' + dialogId);
				if(!dialog.length) dialog = jQuery('<div class="ss-uploadfield-dialog" id="' + dialogId + '" />');

				// Show dialog
				dialog.ssdialog({iframeUrl: config['urlSelectDialog']});

				// TODO Allow single-select
				dialog.find('iframe').bind('load', function(e) {
					var contents = $(this).contents(), gridField = contents.find('.ss-gridfield');
					// TODO Fix jQuery custom event bubbling across iframes on same domain
					// gridField.find('.ss-gridfield-items')).bind('selectablestop', function() {
					// });

					// Remove top margin (easier than including new selectors)
					contents.find('table.ss-gridfield').css('margin-top', 0);

					// Can't use live() in iframes...
					contents.find('input[name=action_doAttach]').unbind('click.openSelectDialog').bind('click.openSelectDialog', function() {
						// TODO Fix entwine method calls across iframe/document boundaries
						var ids = $.map(gridField.find('.ss-gridfield-item.ui-selected'), function(el) {return $(el).data('id');});
						if(ids && ids.length) self.attachFiles(ids);

						dialog.ssdialog('close');
						return false;
					});
				});
				dialog.ssdialog('open');
			},
			attachFiles: function(ids) {
				var self = this, config = this.getConfig();
				$.post(
					config['urlAttach'], 
					{'ids': ids},
					function(data, status, xhr) {
						var fn = self.fileupload('option', 'downloadTemplate');
						self.find('.ss-uploadfield-files').append(fn({
							files: data,
							formatFileSize: function (bytes) {
								if (typeof bytes !== 'number') return '';
								if (bytes >= 1000000000) return (bytes / 1000000000).toFixed(2) + ' GB';
								if (bytes >= 1000000) return (bytes / 1000000).toFixed(2) + ' MB';
								return (bytes / 1000).toFixed(2) + ' KB';
							},
							options: self.fileupload('option')
						}));
					}
				);
			}
		});
		$('div.ss-upload *').entwine({
			getUploadField: function() {
				return this.parents('div.ss-upload:first');
			}
		});
		$('div.ss-upload .ss-uploadfield-files .ss-uploadfield-item').entwine({
			onmatch: function() {
				this.closest('.ss-upload').find('.ss-uploadfield-addfile').addClass('borderTop');
			},
			onunmatch: function() {
				$('.ss-uploadfield-files:not(:has(.ss-uploadfield-item))').closest('.ss-upload').find('.ss-uploadfield-addfile').removeClass('borderTop');
			}
		});
		$('div.ss-upload .ss-uploadfield-startall').entwine({
			onclick: function(e) {
				this.closest('.ss-upload').find('.ss-uploadfield-item-start button').click();
				return false;
			}
		});
		$('div.ss-upload .ss-uploadfield-item-cancelfailed').entwine({
			onclick: function(e) {
				this.closest('.ss-uploadfield-item').remove();
				return false;
			}
		});
		$('div.ss-upload .ss-uploadfield-item-remove:not(.ui-state-disabled), .ss-uploadfield-item-delete:not(.ui-state-disabled)').entwine({
			onclick: function(e) {
				var fileupload = this.closest('div.ss-upload').data('fileupload'), 
					item = this.closest('.ss-uploadfield-item'), msg = '';
				
				if(this.is('.ss-uploadfield-item-delete')) msg = ss.i18n._t('UploadField.ConfirmDelete');
				if(!msg || confirm(msg)) {
					fileupload._trigger('destroy', e, {
						context: item,
						url: this.data('href'),
						type: 'get',
						dataType: fileupload.options.dataType
					});	
				}
				
				return false;
			}
		});
		$('div.ss-upload .ss-uploadfield-item-edit').entwine({
			onclick: function(e) {
				var editform = this.closest('.ss-uploadfield-item').find('.ss-uploadfield-item-editform');
				if (editform.hasClass('loading')) {
					// TODO Display loading indication, and register an event to toggle edit form 
				} else {
					this.siblings().toggleClass('ui-state-disabled');
					editform.toggleEditForm();
				}
				e.preventDefault(); // Avoid a form submit
			}
		});
		$('div.ss-upload .ss-uploadfield-item-editform').entwine({
			fitHeight: function() {
				var iframe = this.find('iframe'), h = iframe.contents().height();
				// Set iframe to match its contents height
				iframe.height(h); 
				// set container to match the same height
				iframe.parent().height(h);
			},
			toggleEditForm: function() {
				if(this.height() === 0) {
					this.fitHeight();	
				} else {
					this.height(0);
				}
			}
		});
		$('div.ss-upload .ss-uploadfield-item-editform iframe').entwine({
			onmatch: function() {
				// TODO entwine event binding doesn't work for iframes
				this.load(function() {
					$(this).parent().removeClass('loading');	
				});
			}
		});
		$('div.ss-upload .ss-uploadfield-fromfiles').entwine({
			onclick: function(e) {
				e.preventDefault();
				this.getUploadField().openSelectDialog();
			}
		});
	});
}(jQuery));