/**
   * ownCloud
   *

   * @author Bartek Przybylski, Christopher Schäpers, Thomas Tanghus

   * @copyright 2012 Bartek Przybylski bartek@alefzero.eu
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
   * License as published by the Free Software Foundation; either
   * version 3 of the License, or any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
   *
   * You should have received a copy of the GNU Affero General Public
   * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
   *
   */
  
  /**
   * this class to ease the usage of jquery dialogs
   */
  var OCdialogs = {

  	// dialog button types
  	YES_NO_BUTTONS:		70,
  	OK_BUTTONS:		71,
  	// used to name each dialog
  	dialogs_counter: 0,

  	/**
  	* displays alert dialog
  	* @param text content of dialog
  	* @param title dialog title

  	* @param callback which will be triggered when user presses OK
  	* @param modal make the dialog modal

  	*/
  	alert:function(text, title, callback, modal) {

  		this.message(text, title, 'alert', OCdialogs.OK_BUTTON, callback, modal);

  	},
  	/**
  	* displays info dialog
  	* @param text content of dialog
  	* @param title dialog title

  	* @param callback which will be triggered when user presses OK
  	* @param modal make the dialog modal

  	*/
  	info:function(text, title, callback, modal) {

  		this.message(text, title, 'info', OCdialogs.OK_BUTTON, callback, modal);

  	},
  	/**
  	* displays confirmation dialog
  	* @param text content of dialog
  	* @param title dialog title

  	* @param callback which will be triggered when user presses YES or NO (true or false would be passed to callback respectively)
  	* @param modal make the dialog modal

  	*/
  	confirm:function(text, title, callback, modal) {

  		this.message(text, title, 'notice', OCdialogs.YES_NO_BUTTONS, callback, modal);

  	},
  	/**

  	 * show a file picker to pick a file from
  	 * @param title dialog title
  	 * @param callback which will be triggered when user presses Choose
  	 * @param multiselect whether it should be possible to select multiple files
  	 * @param mimetype_filter mimetype to filter by
  	 * @param modal make the dialog modal

  	*/

  	filepicker:function(title, callback, multiselect, mimetype_filter, modal) {
  		var self = this;
  		$.when(this._getFilePickerTemplate()).then(function($tmpl) {
  			var dialog_name = 'oc-dialog-filepicker-content';
  			var dialog_id = '#' + dialog_name;
  			if(self.$filePicker) {
  				self.$filePicker.ocdialog('close');
  			}
  			self.$filePicker = $tmpl.octemplate({
  				dialog_name: dialog_name,
  				title: title
  			}).data('path', '').data('multiselect', multiselect).data('mimetype', mimetype_filter);
  
  			if (modal === undefined) {
  				modal = false;
  			}
  			if (multiselect === undefined) {
  				multiselect = false;
  			}
  			if (mimetype_filter === undefined) {
  				mimetype_filter = '';
  			}
  
  			$('body').append(self.$filePicker);
  
  
  			self.$filePicker.ready(function() {
  				self.$filelist = self.$filePicker.find('.filelist');
  				self.$dirTree = self.$filePicker.find('.dirtree');
  				self.$dirTree.on('click', 'span:not(:last-child)', self, self._handleTreeListSelect);
  				self.$filelist.on('click', 'li', function(event) {
  					self._handlePickerClick(event, $(this));
  				});
  				self._fillFilePicker('');
  			});
  
  			// build buttons
  			var functionToCall = function() {
  				if (callback !== undefined) {
  					var datapath;
  					if (multiselect === true) {
  						datapath = [];
  						self.$filelist.find('.filepicker_element_selected .filename').each(function(index, element) {
  							datapath.push(self.$filePicker.data('path') + '/' + $(element).text());
  						});

  					} else {

  						datapath = self.$filePicker.data('path');
  						datapath += '/' + self.$filelist.find('.filepicker_element_selected .filename').text();

  					}

  					callback(datapath);
  					self.$filePicker.ocdialog('close');

  				}

  			};
  			var buttonlist = [{
  				text: t('core', 'Choose'),
  				click: functionToCall,
  				defaultButton: true
  			}];
  
  			self.$filePicker.ocdialog({
  				closeOnEscape: true,
  				width: (4/9)*$(document).width(),
  				height: 420,
  				modal: modal,
  				buttons: buttonlist,
  				close: function(event, ui) {
  					try {
  						$(this).ocdialog('destroy').remove();
  					} catch(e) {}
  					self.$filePicker = null;

  				}

  			});
  		})
  		.fail(function(status, error) {
  			// If the method is called while navigating away
  			// from the page, it is probably not needed ;)
  			if(status !== 0) {
  				alert(t('core', 'Error loading file picker template: {error}', {error: error}));

  			}

  		});

  	},

  	/**
  	 * Displays raw dialog
  	 * You better use a wrapper instead ...
  	*/
  	message:function(content, title, dialog_type, buttons, callback, modal) {
  		$.when(this._getMessageTemplate()).then(function($tmpl) {
  			var dialog_name = 'oc-dialog-' + OCdialogs.dialogs_counter + '-content';
  			var dialog_id = '#' + dialog_name;
  			var $dlg = $tmpl.octemplate({
  				dialog_name: dialog_name,
  				title: title,
  				message: content,
  				type: dialog_type

  			});

  			if (modal === undefined) {
  				modal = false;
  			}
  			$('body').append($dlg);
  			var buttonlist = [];
  			switch (buttons) {
  				case OCdialogs.YES_NO_BUTTONS:
  					buttonlist = [{
  						text: t('core', 'Yes'),
  						click: function(){
  							if (callback !== undefined) {
  								callback(true);
  							}
  							$(dialog_id).ocdialog('close');
  						},
  						defaultButton: true
  					},
  					{
  						text: t('core', 'No'),
  						click: function(){
  							if (callback !== undefined) {
  								callback(false);
  							}
  							$(dialog_id).ocdialog('close');
  						}
  					}];
  				break;
  				case OCdialogs.OK_BUTTON:
  					var functionToCall = function() {
  						$(dialog_id).ocdialog('close');
  						if(callback !== undefined) {
  							callback();
  						}
  					};
  					buttonlist[0] = {
  						text: t('core', 'Ok'),
  						click: functionToCall,
  						defaultButton: true
  					};
  				break;
  			}
  
  			$(dialog_id).ocdialog({
  				closeOnEscape: true,
  				modal: modal,
  				buttons: buttonlist
  			});
  			OCdialogs.dialogs_counter++;
  		})
  		.fail(function(status, error) {
  			// If the method is called while navigating away from
  			// the page, we still want to deliver the message.
  			if(status === 0) {
  				alert(title + ': ' + content);
  			} else {
  				alert(t('core', 'Error loading message template: {error}', {error: error}));
  			}
  		});
  	},
  	_fileexistsshown: false,
  	/**
  	 * Displays file exists dialog
  	 * @param {object} data upload object
  	 * @param {object} original file with name, size and mtime
  	 * @param {object} replacement file with name, size and mtime
  	 * @param {object} controller with onCancel, onSkip, onReplace and onRename methods
  	*/
  	fileexists:function(data, original, replacement, controller) {
  		var self = this;
  
  		var getCroppedPreview = function(file) {
  			var deferred = new $.Deferred();
  			// Only process image files.
  			var type = file.type && file.type.split('/').shift();
  			if (window.FileReader && type === 'image') {
  				var reader = new FileReader();
  				reader.onload = function (e) {
  					var blob = new Blob([e.target.result]);
  					window.URL = window.URL || window.webkitURL;
  					var originalUrl = window.URL.createObjectURL(blob);
  					var image = new Image();
  					image.src = originalUrl;
  					image.onload = function () {
  						var url = crop(image);
  						deferred.resolve(url);

  					}

  				};
  				reader.readAsArrayBuffer(file);
  			} else {
  				deferred.reject();
  			}
  			return deferred;
  		};
  
  		var crop = function(img) {
  			var canvas = document.createElement('canvas'),
  				width = img.width,
  				height = img.height,
  				x, y, size;
  
  			// calculate the width and height, constraining the proportions
  			if (width > height) {
  				y = 0;
  				x = (width - height) / 2;
  			} else {
  				y = (height - width) / 2;
  				x = 0;
  			}
  			size = Math.min(width, height);
  
  			// resize the canvas and draw the image data into it
  			canvas.width = 64;
  			canvas.height = 64;
  			var ctx = canvas.getContext("2d");
  			ctx.drawImage(img, x, y, size, size, 0, 0, 64, 64);
  			return canvas.toDataURL("image/png", 0.7);
  		};
  
  		var addConflict = function(conflicts, original, replacement) {
  
  			var conflict = conflicts.find('.template').clone().removeClass('template').addClass('conflict');
  
  			conflict.data('data',data);
  
  			conflict.find('.filename').text(original.name);
  			conflict.find('.original .size').text(humanFileSize(original.size));
  			conflict.find('.original .mtime').text(formatDate(original.mtime*1000));
  			// ie sucks
  			if (replacement.size && replacement.lastModifiedDate) {
  				conflict.find('.replacement .size').text(humanFileSize(replacement.size));
  				conflict.find('.replacement .mtime').text(formatDate(replacement.lastModifiedDate));
  			}
  			var path = getPathForPreview(original.name);
  			Files.lazyLoadPreview(path, original.mime, function(previewpath){
  				conflict.find('.original .icon').css('background-image','url('+previewpath+')');
  			}, 96, 96, original.etag);
  			getCroppedPreview(replacement).then(
  				function(path){
  					conflict.find('.replacement .icon').css('background-image','url(' + path + ')');
  				}, function(){
  					Files.getMimeIcon(replacement.type,function(path){
  						conflict.find('.replacement .icon').css('background-image','url(' + path + ')');
  					});

  				}

  			);
  			conflicts.append(conflict);
  
  			//set more recent mtime bold
  			// ie sucks
  			if (replacement.lastModifiedDate && replacement.lastModifiedDate.getTime() > original.mtime*1000) {
  				conflict.find('.replacement .mtime').css('font-weight', 'bold');
  			} else if (replacement.lastModifiedDate && replacement.lastModifiedDate.getTime() < original.mtime*1000) {
  				conflict.find('.original .mtime').css('font-weight', 'bold');
  			} else {
  				//TODO add to same mtime collection?
  			}
  
  			// set bigger size bold
  			if (replacement.size && replacement.size > original.size) {
  				conflict.find('.replacement .size').css('font-weight', 'bold');
  			} else if (replacement.size && replacement.size < original.size) {
  				conflict.find('.original .size').css('font-weight', 'bold');
  			} else {
  				//TODO add to same size collection?
  			}
  
  			//TODO show skip action for files with same size and mtime in bottom row
  
  		};
  		//var selection = controller.getSelection(data.originalFiles);
  		//if (selection.defaultAction) {
  		//	controller[selection.defaultAction](data);
  		//} else {
  			var dialog_name = 'oc-dialog-fileexists-content';
  			var dialog_id = '#' + dialog_name;
  			if (this._fileexistsshown) {
  				// add conflict
  
  				var conflicts = $(dialog_id+ ' .conflicts');
  				addConflict(conflicts, original, replacement);
  
  				var count = $(dialog_id+ ' .conflict').length;
  				var title = n('files',
  								'{count} file conflict',
  								'{count} file conflicts',
  								count,
  								{count:count}
  							);
  				$(dialog_id).parent().children('.oc-dialog-title').text(title);
  
  				//recalculate dimensions
  				$(window).trigger('resize');
  
  			} else {
  				//create dialog
  				this._fileexistsshown = true;
  				$.when(this._getFileExistsTemplate()).then(function($tmpl) {
  					var title = t('files','One file conflict');
  					var $dlg = $tmpl.octemplate({
  						dialog_name: dialog_name,
  						title: title,
  						type: 'fileexists',
  
  						why: t('files','Which files do you want to keep?'),
  						what: t('files','If you select both versions, the copied file will have a number added to its name.')
  					});
  					$('body').append($dlg);
  
  					var conflicts = $($dlg).find('.conflicts');
  					addConflict(conflicts, original, replacement);
  
  					buttonlist = [{
  							text: t('core', 'Cancel'),
  							classes: 'cancel',
  							click: function(){
  								if ( typeof controller.onCancel !== 'undefined') {
  									controller.onCancel(data);
  								}
  								$(dialog_id).ocdialog('close');
  							}
  						},
  						{
  							text: t('core', 'Continue'),
  							classes: 'continue',
  							click: function(){
  								if ( typeof controller.onContinue !== 'undefined') {
  									controller.onContinue($(dialog_id + ' .conflict'));
  								}
  								$(dialog_id).ocdialog('close');
  							}
  						}];
  
  					$(dialog_id).ocdialog({
  						width: 500,
  						closeOnEscape: true,
  						modal: true,
  						buttons: buttonlist,
  						closeButton: null,
  						close: function(event, ui) {
  								self._fileexistsshown = false;
  							$(this).ocdialog('destroy').remove();
  						}
  					});
  
  					$(dialog_id).css('height','auto');
  
  					//add checkbox toggling actions
  					$(dialog_id).find('.allnewfiles').on('click', function() {
  						var checkboxes = $(dialog_id).find('.conflict .replacement input[type="checkbox"]');
  						checkboxes.prop('checked', $(this).prop('checked'));
  					});
  					$(dialog_id).find('.allexistingfiles').on('click', function() {
  						var checkboxes = $(dialog_id).find('.conflict .original input[type="checkbox"]');
  						checkboxes.prop('checked', $(this).prop('checked'));
  					});
  					$(dialog_id).find('.conflicts').on('click', '.replacement,.original', function() {
  						var checkbox = $(this).find('input[type="checkbox"]');
  						checkbox.prop('checked', !checkbox.prop('checked'));
  					});
  					$(dialog_id).find('.conflicts').on('click', 'input[type="checkbox"]', function() {
  						var checkbox = $(this);
  						checkbox.prop('checked', !checkbox.prop('checked'));
  					});
  
  					//update counters
  					$(dialog_id).on('click', '.replacement,.allnewfiles', function() {
  						var count = $(dialog_id).find('.conflict .replacement input[type="checkbox"]:checked').length;
  						if (count === $(dialog_id+ ' .conflict').length) {
  							$(dialog_id).find('.allnewfiles').prop('checked', true);
  							$(dialog_id).find('.allnewfiles + .count').text(t('files','(all selected)'));
  						} else if (count > 0) {
  							$(dialog_id).find('.allnewfiles').prop('checked', false);
  							$(dialog_id).find('.allnewfiles + .count').text(t('files','({count} selected)',{count:count}));
  						} else {
  							$(dialog_id).find('.allnewfiles').prop('checked', false);
  							$(dialog_id).find('.allnewfiles + .count').text('');
  						}
  					});
  					$(dialog_id).on('click', '.original,.allexistingfiles', function(){
  						var count = $(dialog_id).find('.conflict .original input[type="checkbox"]:checked').length;
  						if (count === $(dialog_id+ ' .conflict').length) {
  							$(dialog_id).find('.allexistingfiles').prop('checked', true);
  							$(dialog_id).find('.allexistingfiles + .count').text(t('files','(all selected)'));
  						} else if (count > 0) {
  							$(dialog_id).find('.allexistingfiles').prop('checked', false);
  							$(dialog_id).find('.allexistingfiles + .count').text(t('files','({count} selected)',{count:count}));
  						} else {
  							$(dialog_id).find('.allexistingfiles').prop('checked', false);
  							$(dialog_id).find('.allexistingfiles + .count').text('');
  						}
  					});
  				})
  				.fail(function() {
  					alert(t('core', 'Error loading file exists template'));
  				});

  			}

  		//}

  	},

  	_getFilePickerTemplate: function() {
  		var defer = $.Deferred();
  		if(!this.$filePickerTemplate) {
  			var self = this;
  			$.get(OC.filePath('core', 'templates', 'filepicker.html'), function(tmpl) {
  				self.$filePickerTemplate = $(tmpl);
  				self.$listTmpl = self.$filePickerTemplate.find('.filelist li:first-child').detach();
  				defer.resolve(self.$filePickerTemplate);
  			})
  			.fail(function(jqXHR, textStatus, errorThrown) {
  				defer.reject(jqXHR.status, errorThrown);
  			});
  		} else {
  			defer.resolve(this.$filePickerTemplate);

  		}

  		return defer.promise();

  	},

  	_getMessageTemplate: function() {
  		var defer = $.Deferred();
  		if(!this.$messageTemplate) {
  			var self = this;
  			$.get(OC.filePath('core', 'templates', 'message.html'), function(tmpl) {
  				self.$messageTemplate = $(tmpl);
  				defer.resolve(self.$messageTemplate);
  			})
  			.fail(function(jqXHR, textStatus, errorThrown) {
  				defer.reject(jqXHR.status, errorThrown);
  			});
  		} else {
  			defer.resolve(this.$messageTemplate);

  		}

  		return defer.promise();

  	},

  	_getFileExistsTemplate: function () {
  		var defer = $.Deferred();
  		if (!this.$fileexistsTemplate) {
  			var self = this;
  			$.get(OC.filePath('files', 'templates', 'fileexists.html'), function (tmpl) {
  				self.$fileexistsTemplate = $(tmpl);
  				defer.resolve(self.$fileexistsTemplate);
  			})
  			.fail(function () {
  				defer.reject();

  			});

  		} else {

  			defer.resolve(this.$fileexistsTemplate);

  		}

  		return defer.promise();

  	},

  	_getFileList: function(dir, mimeType) {
  		if (typeof(mimeType) === "string") {
  			mimeType = [mimeType];

  		}

  
  		return $.getJSON(
  			OC.filePath('files', 'ajax', 'rawlist.php'),
  			{
  				dir: dir,
  				mimetypes: JSON.stringify(mimeType)

  			}

  		);
  	},
  	_determineValue: function(element) {
  		if ( $(element).attr('type') === 'checkbox' ) {
  			return element.checked;
  		} else {
  			return $(element).val();
  		}
  	},
  
  	/**
  	 * fills the filepicker with files
  	*/
  	_fillFilePicker:function(dir) {
  		var dirs = [];
  		var others = [];
  		var self = this;
  		this.$filelist.empty().addClass('loading');
  		this.$filePicker.data('path', dir);
  		$.when(this._getFileList(dir, this.$filePicker.data('mimetype'))).then(function(response) {
  			$.each(response.data, function(index, file) {
  				if (file.type === 'dir') {
  					dirs.push(file);
  				} else {
  					others.push(file);
  				}
  			});
  
  			self._fillSlug();
  			var sorted = dirs.concat(others);
  
  			$.each(sorted, function(idx, entry) {
  				var $li = self.$listTmpl.octemplate({
  					type: entry.type,
  					dir: dir,
  					filename: entry.name,
  					date: OC.mtime2date(entry.mtime)
  				});
  				$li.find('img').attr('src', entry.mimetype_icon);
  				self.$filelist.append($li);
  			});
  
  			self.$filelist.removeClass('loading');

  		});

  	},

  	/**
  	 * fills the tree list with directories
  	*/
  	_fillSlug: function() {
  		this.$dirTree.empty();
  		var self = this;
  		var path = this.$filePicker.data('path');
  		var $template = $('<span data-dir="{dir}">{name}</span>');
  		if(path) {
  			var paths = path.split('/');
  			$.each(paths, function(index, dir) {
  				dir = paths.pop();
  				if(dir === '') {
  					return false;
  				}
  				self.$dirTree.prepend($template.octemplate({
  					dir: paths.join('/') + '/' + dir,
  					name: dir
  				}));
  			});
  		}
  		$template.octemplate({
  			dir: '',
  			name: '&nbsp;&nbsp;&nbsp;&nbsp;' // Ugly but works ;)
  		}, {escapeFunction: null}).addClass('home svg').prependTo(this.$dirTree);
  	},
  	/**
  	 * handle selection made in the tree list
  	*/
  	_handleTreeListSelect:function(event) {
  		var self = event.data;
  		var dir = $(event.target).data('dir');
  		self._fillFilePicker(dir);
  	},
  	/**
  	 * handle clicks made in the filepicker
  	*/
  	_handlePickerClick:function(event, $element) {
  		if ($element.data('type') === 'file') {
  			if (this.$filePicker.data('multiselect') !== true || !event.ctrlKey) {
  				this.$filelist.find('.filepicker_element_selected').removeClass('filepicker_element_selected');

  			}

  			$element.toggleClass('filepicker_element_selected');

  			return;

  		} else if ( $element.data('type') === 'dir' ) {
  			this._fillFilePicker(this.$filePicker.data('path') + '/' + $element.data('entryname'));

  		}

  	}
  };