var uploadingFiles = {};
Files={
	cancelUpload:function(filename) {
		if(uploadingFiles[filename]) {
			uploadingFiles[filename].abort();
			delete uploadingFiles[filename];
			return true;
		}
		return false;
	},
	cancelUploads:function() {
		$.each(uploadingFiles,function(index,file) {
			if(typeof file['abort'] === 'function') {
				file.abort();
				var filename = $('tr').filterAttr('data-file',index);
				filename.hide();
				filename.find('input[type="checkbox"]').removeAttr('checked');
				filename.removeClass('selected');
			} else {
				$.each(file,function(i,f) {
					f.abort();
					delete file[i];
				});
			}
			delete uploadingFiles[index];
		});
		procesSelection();
	},
	updateMaxUploadFilesize:function(response) {
		if(response == undefined) {
			return;
		}
		if(response.data !== undefined && response.data.uploadMaxFilesize !== undefined) {
			$('#max_upload').val(response.data.uploadMaxFilesize);
			$('#upload.button').attr('original-title', response.data.maxHumanFilesize);
			$('#usedSpacePercent').val(response.data.usedSpacePercent);
			Files.displayStorageWarnings();
		}
		if(response[0] == undefined) {
			return;
		}
		if(response[0].uploadMaxFilesize !== undefined) {
			$('#max_upload').val(response[0].uploadMaxFilesize);
			$('#upload.button').attr('original-title', response[0].maxHumanFilesize);
			$('#usedSpacePercent').val(response[0].usedSpacePercent);
			Files.displayStorageWarnings();
		}

	},
	isFileNameValid:function (name) {
		if (name === '.') {
			OC.Notification.show(t('files', '\'.\' is an invalid file name.'));
			return false;
		}
		if (name.length == 0) {
			OC.Notification.show(t('files', 'File name cannot be empty.'));
			return false;
		}

		// check for invalid characters
		var invalid_characters = ['\\', '/', '<', '>', ':', '"', '|', '?', '*'];
		for (var i = 0; i < invalid_characters.length; i++) {
			if (name.indexOf(invalid_characters[i]) != -1) {
				OC.Notification.show(t('files', "Invalid name, '\\', '/', '<', '>', ':', '\"', '|', '?' and '*' are not allowed."));
				return false;
			}
		}
		OC.Notification.hide();
		return true;
	},
	displayStorageWarnings: function() {
		if (!OC.Notification.isHidden()) {
			return;
		}

		var usedSpacePercent = $('#usedSpacePercent').val();
		if (usedSpacePercent > 98) {
			OC.Notification.show(t('files', 'Your storage is full, files can not be updated or synced anymore!'));
			return;
		}
		if (usedSpacePercent > 90) {
			OC.Notification.show(t('files', 'Your storage is almost full ({usedSpacePercent}%)', {usedSpacePercent: usedSpacePercent}));
		}
	},

	displayEncryptionWarning: function() {

		if (!OC.Notification.isHidden()) {
			return;
		}

		var encryptedFiles = $('#encryptedFiles').val();
		var initStatus = $('#encryptionInitStatus').val();
		if (initStatus === '0') { // enc not initialized, but should be
			OC.Notification.show(t('files_encryption', 'Encryption App is enabled but your keys are not initialized, please log-out and log-in again'));
			return;
		}
		if (initStatus === '1') { // encryption tried to init but failed
			OC.Notification.show(t('files_encryption', 'Your private key is not valid! Likely your password was changed outside the ownCloud system (e.g. your corporate directory). You can update your private key password in your personal settings to recover access to your encrypted files.'));
			return;
		}
		if (encryptedFiles === '1') {
			OC.Notification.show(t('files_encryption', 'Encryption was disabled but your files are still encrypted. Please go to your personal settings to decrypt your files.'));
			return;
		}
	}
};
$(document).ready(function() {
	Files.displayEncryptionWarning();
	Files.bindKeyboardShortcuts(document, jQuery);
	$('#fileList tr').each(function(){
		//little hack to set unescape filenames in attribute
		$(this).attr('data-file',decodeURIComponent($(this).attr('data-file')));
	});

	$('#file_action_panel').attr('activeAction', false);

	//drag/drop of files
	$('#fileList tr td.filename').each(function(i,e){
		if ($(e).parent().data('permissions') & OC.PERMISSION_DELETE) {
			$(e).draggable(dragOptions);
		}
	});
	$('#fileList tr[data-type="dir"] td.filename').each(function(i,e){
		if ($(e).parent().data('permissions') & OC.PERMISSION_CREATE){
			$(e).droppable(folderDropOptions);
		}
	});
	$('div.crumb:not(.last)').droppable(crumbDropOptions);
	$('ul#apps>li:first-child').data('dir','');
	if($('div.crumb').length){
		$('ul#apps>li:first-child').droppable(crumbDropOptions);
	}

	// Triggers invisible file input
	$('#upload a').on('click', function() {
		$(this).parent().children('#file_upload_start').trigger('click');
		return false;
	});

	// Trigger cancelling of file upload
	$('#uploadprogresswrapper .stop').on('click', function() {
		Files.cancelUploads();
	});

	// Show trash bin
	$('#trash').on('click', function() {
		window.location=OC.filePath('files_trashbin', '', 'index.php');
	});

	var lastChecked;

	// Sets the file link behaviour :
	$('#fileList').on('click','td.filename a',function(event) {
		if (event.ctrlKey || event.shiftKey) {
			event.preventDefault();
			if (event.shiftKey) {
				var last = $(lastChecked).parent().parent().prevAll().length;
				var first = $(this).parent().parent().prevAll().length;
				var start = Math.min(first, last);
				var end = Math.max(first, last);
				var rows = $(this).parent().parent().parent().children('tr');
				for (var i = start; i < end; i++) {
					$(rows).each(function(index) {
						if (index == i) {
							var checkbox = $(this).children().children('input:checkbox');
							$(checkbox).attr('checked', 'checked');
							$(checkbox).parent().parent().addClass('selected');
						}
					});
				}
			}
			var checkbox = $(this).parent().children('input:checkbox');
			lastChecked = checkbox;
			if ($(checkbox).attr('checked')) {
				$(checkbox).removeAttr('checked');
				$(checkbox).parent().parent().removeClass('selected');
				$('#select_all').removeAttr('checked');
			} else {
				$(checkbox).attr('checked', 'checked');
				$(checkbox).parent().parent().toggleClass('selected');
				var selectedCount=$('td.filename input:checkbox:checked').length;
				if (selectedCount == $('td.filename input:checkbox').length) {
					$('#select_all').attr('checked', 'checked');
				}
			}
			procesSelection();
		} else {
			var filename=$(this).parent().parent().attr('data-file');
			var tr=$('tr').filterAttr('data-file',filename);
			var renaming=tr.data('renaming');
			if(!renaming && !FileList.isLoading(filename)){
				FileActions.currentFile = $(this).parent();
				var mime=FileActions.getCurrentMimeType();
				var type=FileActions.getCurrentType();
				var permissions = FileActions.getCurrentPermissions();
				var action=FileActions.getDefault(mime,type, permissions);
				if(action){
					event.preventDefault();
					action(filename);
				}
			}
		}

	});

	// Sets the select_all checkbox behaviour :
	$('#select_all').click(function() {
		if($(this).attr('checked')){
			// Check all
			$('td.filename input:checkbox').attr('checked', true);
			$('td.filename input:checkbox').parent().parent().addClass('selected');
		}else{
			// Uncheck all
			$('td.filename input:checkbox').attr('checked', false);
			$('td.filename input:checkbox').parent().parent().removeClass('selected');
		}
		procesSelection();
	});

	$('#fileList').on('change', 'td.filename input:checkbox',function(event) {
		if (event.shiftKey) {
			var last = $(lastChecked).parent().parent().prevAll().length;
			var first = $(this).parent().parent().prevAll().length;
			var start = Math.min(first, last);
			var end = Math.max(first, last);
			var rows = $(this).parent().parent().parent().children('tr');
			for (var i = start; i < end; i++) {
				$(rows).each(function(index) {
					if (index == i) {
						var checkbox = $(this).children().children('input:checkbox');
						$(checkbox).attr('checked', 'checked');
						$(checkbox).parent().parent().addClass('selected');
					}
				});
			}
		}
		var selectedCount=$('td.filename input:checkbox:checked').length;
		$(this).parent().parent().toggleClass('selected');
		if(!$(this).attr('checked')){
			$('#select_all').attr('checked',false);
		}else{
			if(selectedCount==$('td.filename input:checkbox').length){
				$('#select_all').attr('checked',true);
			}
		}
		procesSelection();
	});

	$('.download').click('click',function(event) {
		var files=getSelectedFiles('name');
		var fileslist = JSON.stringify(files);
		var dir=$('#dir').val()||'/';
		OC.Notification.show(t('files','Your download is being prepared. This might take some time if the files are big.'));
		// use special download URL if provided, e.g. for public shared files
		if ( (downloadURL = document.getElementById("downloadURL")) ) {
			window.location=downloadURL.value+"&download&files="+encodeURIComponent(fileslist);
		} else {
			window.location=OC.filePath('files', 'ajax', 'download.php') + '?'+ $.param({ dir: dir, files: fileslist });
		}
		return false;
	});

	$('.delete-selected').click(function(event) {
		var files=getSelectedFiles('name');
		event.preventDefault();
		FileList.do_delete(files);
		return false;
	});

	// drag&drop support using jquery.fileupload
	// TODO use OC.dialogs
	$(document).bind('drop dragover', function (e) {
			e.preventDefault(); // prevent browser from doing anything, if file isn't dropped in dropZone
	});

	//do a background scan if needed
	scanFiles();

	var lastWidth = 0;
	var breadcrumbs = [];
	var breadcrumbsWidth = 0;
	if ( document.getElementById("navigation") ) {
		breadcrumbsWidth = $('#navigation').get(0).offsetWidth;
	}
	var hiddenBreadcrumbs = 0;

	$.each($('.crumb'), function(index, breadcrumb) {
		breadcrumbs[index] = breadcrumb;
		breadcrumbsWidth += $(breadcrumb).get(0).offsetWidth;
	});


	$.each($('#controls .actions>div'), function(index, action) {
		breadcrumbsWidth += $(action).get(0).offsetWidth;
	});

	function resizeBreadcrumbs(firstRun) {
		var width = $(this).width();
		if (width != lastWidth) {
			if ((width < lastWidth || firstRun) && width < breadcrumbsWidth) {
				if (hiddenBreadcrumbs == 0) {
					breadcrumbsWidth -= $(breadcrumbs[1]).get(0).offsetWidth;
					$(breadcrumbs[1]).find('a').hide();
					$(breadcrumbs[1]).append('<span>...</span>');
					breadcrumbsWidth += $(breadcrumbs[1]).get(0).offsetWidth;
					hiddenBreadcrumbs = 2;
				}
				var i = hiddenBreadcrumbs;
				while (width < breadcrumbsWidth && i > 1 && i < breadcrumbs.length - 1) {
					breadcrumbsWidth -= $(breadcrumbs[i]).get(0).offsetWidth;
					$(breadcrumbs[i]).hide();
					hiddenBreadcrumbs = i;
					i++
				}
			} else if (width > lastWidth && hiddenBreadcrumbs > 0) {
				var i = hiddenBreadcrumbs;
				while (width > breadcrumbsWidth && i > 0) {
					if (hiddenBreadcrumbs == 1) {
						breadcrumbsWidth -= $(breadcrumbs[1]).get(0).offsetWidth;
						$(breadcrumbs[1]).find('span').remove();
						$(breadcrumbs[1]).find('a').show();
						breadcrumbsWidth += $(breadcrumbs[1]).get(0).offsetWidth;
					} else {
						$(breadcrumbs[i]).show();
						breadcrumbsWidth += $(breadcrumbs[i]).get(0).offsetWidth;
						if (breadcrumbsWidth > width) {
							breadcrumbsWidth -= $(breadcrumbs[i]).get(0).offsetWidth;
							$(breadcrumbs[i]).hide();
							break;
						}
					}
					i--;
					hiddenBreadcrumbs = i;
				}
			}
			lastWidth = width;
		}
	}

	$(window).resize(function() {
		resizeBreadcrumbs(false);
	});

	resizeBreadcrumbs(true);

	// display storage warnings
	setTimeout ( "Files.displayStorageWarnings()", 100 );
	OC.Notification.setDefault(Files.displayStorageWarnings);

	// file space size sync
	function update_storage_statistics() {
		$.getJSON(OC.filePath('files','ajax','getstoragestats.php'),function(response) {
			Files.updateMaxUploadFilesize(response);
		});
	}

	// start on load - we ask the server every 5 minutes
	var update_storage_statistics_interval = 5*60*1000;
	var update_storage_statistics_interval_id = setInterval(update_storage_statistics, update_storage_statistics_interval);

	// Use jquery-visibility to de-/re-activate file stats sync
	if ($.support.pageVisibility) {
		$(document).on({
			'show.visibility': function() {
				if (!update_storage_statistics_interval_id) {
					update_storage_statistics_interval_id = setInterval(update_storage_statistics, update_storage_statistics_interval);
				}
			},
			'hide.visibility': function() {
				clearInterval(update_storage_statistics_interval_id);
				update_storage_statistics_interval_id = 0;
			}
		});
	}
});

function scanFiles(force, dir, users){
	if (!OC.currentUser) {
		return;
	}

	if(!dir){
		dir = '';
	}
	force = !!force; //cast to bool
	scanFiles.scanning = true;
	var scannerEventSource;
	if (users) {
		var usersString;
		if (users === 'all') {
			usersString = users;
		} else {
			usersString = JSON.stringify(users);
		}
		scannerEventSource = new OC.EventSource(OC.filePath('files','ajax','scan.php'),{force: force,dir: dir, users: usersString});
	} else {
		scannerEventSource = new OC.EventSource(OC.filePath('files','ajax','scan.php'),{force: force,dir: dir});
	}
	scanFiles.cancel = scannerEventSource.close.bind(scannerEventSource);
	scannerEventSource.listen('count',function(count){
		console.log(count + ' files scanned')
	});
	scannerEventSource.listen('folder',function(path){
		console.log('now scanning ' + path)
	});
	scannerEventSource.listen('done',function(count){
		scanFiles.scanning=false;
		console.log('done after ' + count + ' files');
	});
	scannerEventSource.listen('user',function(user){
		console.log('scanning files for ' + user);
	});
}
scanFiles.scanning=false;

function boolOperationFinished(data, callback) {
	result = jQuery.parseJSON(data.responseText);
	Files.updateMaxUploadFilesize(result);
	if(result.status == 'success'){
		callback.call();
	} else {
		alert(result.data.message);
	}
}

function updateBreadcrumb(breadcrumbHtml) {
	$('p.nav').empty().html(breadcrumbHtml);
}

var createDragShadow = function(event){
	//select dragged file
	var isDragSelected = $(event.target).parents('tr').find('td input:first').prop('checked');
	if (!isDragSelected) {
		//select dragged file
		$(event.target).parents('tr').find('td input:first').prop('checked',true);
	}

	var selectedFiles = getSelectedFiles();

	if (!isDragSelected && selectedFiles.length == 1) {
		//revert the selection
		$(event.target).parents('tr').find('td input:first').prop('checked',false);
	}

	//also update class when we dragged more than one file
	if (selectedFiles.length > 1) {
		$(event.target).parents('tr').addClass('selected');
	}

	// build dragshadow
	var dragshadow = $('<table class="dragshadow"></table>');
	var tbody = $('<tbody></tbody>');
	dragshadow.append(tbody);

	var dir=$('#dir').val();

	$(selectedFiles).each(function(i,elem){
		var newtr = $('<tr/>').attr('data-dir', dir).attr('data-filename', elem.name);
		newtr.append($('<td/>').addClass('filename').text(elem.name));
		newtr.append($('<td/>').addClass('size').text(humanFileSize(elem.size)));
		tbody.append(newtr);
		if (elem.type === 'dir') {
			newtr.find('td.filename').attr('style','background-image:url('+OC.imagePath('core', 'filetypes/folder.png')+')');
		} else {
			var path = getPathForPreview(elem.name);
			lazyLoadPreview(path, elem.mime, function(previewpath){
				newtr.find('td.filename').attr('style','background-image:url('+previewpath+')');
			});
		}
	});

	return dragshadow;
}

//options for file drag/drop
var dragOptions={
	revert: 'invalid', revertDuration: 300,
	opacity: 0.7, zIndex: 100, appendTo: 'body', cursorAt: { left: -5, top: -5 },
	helper: createDragShadow, cursor: 'move',
	stop: function(event, ui) {
		$('#fileList tr td.filename').addClass('ui-draggable');
	}
}
// sane browsers support using the distance option
if ( $('html.ie').length === 0) {
	dragOptions['distance'] = 20;
}

var folderDropOptions={
	drop: function( event, ui ) {
		//don't allow moving a file into a selected folder
		if ($(event.target).parents('tr').find('td input:first').prop('checked') === true) {
			return false;
		}

		var target=$.trim($(this).find('.nametext').text());

		var files = ui.helper.find('tr');
		$(files).each(function(i,row){
			var dir = $(row).data('dir');
			var file = $(row).data('filename');
			$.post(OC.filePath('files', 'ajax', 'move.php'), { dir: dir, file: file, target: dir+'/'+target }, function(result) {
				if (result) {
					if (result.status === 'success') {
						//recalculate folder size
						var oldSize = $('#fileList tr').filterAttr('data-file',target).data('size');
						var newSize = oldSize + $('#fileList tr').filterAttr('data-file',file).data('size');
						$('#fileList tr').filterAttr('data-file',target).data('size', newSize);
						$('#fileList tr').filterAttr('data-file',target).find('td.filesize').text(humanFileSize(newSize));

						FileList.remove(file);
						procesSelection();
						$('#notification').hide();
					} else {
						$('#notification').hide();
						$('#notification').text(result.data.message);
						$('#notification').fadeIn();
					}
				} else {
					OC.dialogs.alert(t('Error moving file'), t('core', 'Error'));
				}
			});
		});
	},
	tolerance: 'pointer'
}

var crumbDropOptions={
	drop: function( event, ui ) {
		var target=$(this).data('dir');
		var dir=$('#dir').val();
		while(dir.substr(0,1)=='/'){//remove extra leading /'s
				dir=dir.substr(1);
		}
		dir='/'+dir;
		if(dir.substr(-1,1)!='/'){
			dir=dir+'/';
		}
		if(target==dir || target+'/'==dir){
			return;
		}
		var files = ui.helper.find('tr');
		$(files).each(function(i,row){
			var dir = $(row).data('dir');
			var file = $(row).data('filename');
			$.post(OC.filePath('files', 'ajax', 'move.php'), { dir: dir, file: file, target: target }, function(result) {
				if (result) {
					if (result.status === 'success') {
						FileList.remove(file);
						procesSelection();
						$('#notification').hide();
					} else {
						$('#notification').hide();
						$('#notification').text(result.data.message);
						$('#notification').fadeIn();
					}
				} else {
					OC.dialogs.alert(t('Error moving file'), t('core', 'Error'));
				}
			});
		});
	},
	tolerance: 'pointer'
}

function procesSelection(){
	var selected=getSelectedFiles();
	var selectedFiles=selected.filter(function(el){return el.type=='file'});
	var selectedFolders=selected.filter(function(el){return el.type=='dir'});
	if(selectedFiles.length==0 && selectedFolders.length==0) {
		$('#headerName>span.name').text(t('files','Name'));
		$('#headerSize').text(t('files','Size'));
		$('#modified').text(t('files','Modified'));
		$('table').removeClass('multiselect');
		$('.selectedActions').hide();
	}
	else {
		$('.selectedActions').show();
		var totalSize=0;
		for(var i=0;i<selectedFiles.length;i++){
			totalSize+=selectedFiles[i].size;
		};
		for(var i=0;i<selectedFolders.length;i++){
			totalSize+=selectedFolders[i].size;
		};
		$('#headerSize').text(humanFileSize(totalSize));
		var selection='';
		if(selectedFolders.length>0){
			selection += n('files', '%n folder', '%n folders', selectedFolders.length);
			if(selectedFiles.length>0){
				selection+=' & ';
			}
		}
		if(selectedFiles.length>0){
			selection += n('files', '%n file', '%n files', selectedFiles.length);
		}
		$('#headerName>span.name').text(selection);
		$('#modified').text('');
		$('table').addClass('multiselect');
	}
}

/**
 * @brief get a list of selected files
 * @param string property (option) the property of the file requested
 * @return array
 *
 * possible values for property: name, mime, size and type
 * if property is set, an array with that property for each file is returnd
 * if it's ommited an array of objects with all properties is returned
 */
function getSelectedFiles(property){
	var elements=$('td.filename input:checkbox:checked').parent().parent();
	var files=[];
	elements.each(function(i,element){
		var file={
			name:$(element).attr('data-file'),
			mime:$(element).data('mime'),
			type:$(element).data('type'),
			size:$(element).data('size')
		};
		if(property){
			files.push(file[property]);
		}else{
			files.push(file);
		}
	});
	return files;
}

function getMimeIcon(mime, ready){
	if(getMimeIcon.cache[mime]){
		ready(getMimeIcon.cache[mime]);
	}else{
		$.get( OC.filePath('files','ajax','mimeicon.php'), {mime: mime}, function(path){
			getMimeIcon.cache[mime]=path;
			ready(getMimeIcon.cache[mime]);
		});
	}
}
getMimeIcon.cache={};

function getPathForPreview(name) {
	var path = $('#dir').val() + '/' + name;
	return path;
}

function lazyLoadPreview(path, mime, ready) {
	getMimeIcon(mime,ready);
	var x = $('#filestable').data('preview-x');
	var y = $('#filestable').data('preview-y');
	var previewURL = OC.Router.generate('core_ajax_preview', {file: encodeURIComponent(path), x:x, y:y});
	$.get(previewURL, function() {
		previewURL = previewURL.replace('(','%28');
		previewURL = previewURL.replace(')','%29');
		ready(previewURL + '&reload=true');
	});
}

function getUniqueName(name){
	if($('tr').filterAttr('data-file',name).length>0){
		var parts=name.split('.');
		var extension = "";
		if (parts.length > 1) {
			extension=parts.pop();
		}
		var base=parts.join('.');
		numMatch=base.match(/\((\d+)\)/);
		var num=2;
		if(numMatch && numMatch.length>0){
			num=parseInt(numMatch[numMatch.length-1])+1;
			base=base.split('(')
			base.pop();
			base=$.trim(base.join('('));
		}
		name=base+' ('+num+')';
		if (extension) {
			name = name+'.'+extension;
		}
		return getUniqueName(name);
	}
	return name;
}

function checkTrashStatus() {
	$.post(OC.filePath('files_trashbin', 'ajax', 'isEmpty.php'), function(result){
		if (result.data.isEmpty === false) {
			$("input[type=button][id=trash]").removeAttr("disabled");
		}
	});
}