/**
   * 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/>.
   *
   */

  /* global alert */

  /**
   * 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

  	dialogsCounter: 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) {

  		return this.message(
  			text,
  			title,
  			'notice',
  			OCdialogs.YES_NO_BUTTONS,
  			callback,
  			modal
  		);
  	},
  	/**
  	 * displays prompt 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
  	 * @param name name of the input field
  	 * @param password whether the input should be a password input
  	 */
  	prompt: function (text, title, callback, modal, name, password) {
  		return $.when(this._getMessageTemplate()).then(function ($tmpl) {
  			var dialogName = 'oc-dialog-' + OCdialogs.dialogsCounter + '-content';
  			var dialogId = '#' + dialogName;
  			var $dlg = $tmpl.octemplate({
  				dialog_name: dialogName,
  				title      : title,
  				message    : text,
  				type       : 'notice'
  			});
  			var input = $('<input/>');
  			input.attr('type', password ? 'password' : 'text').attr('id', dialogName + '-input');
  			var label = $('<label/>').attr('for', dialogName + '-input').text(name + ': ');
  			$dlg.append(label);
  			$dlg.append(input);
  			if (modal === undefined) {
  				modal = false;
  			}
  			$('body').append($dlg);
  			var buttonlist = [{
  					text : t('core', 'No'),
  					click: function () {
  						if (callback !== undefined) {
  							callback(false, input.val());
  						}
  						$(dialogId).ocdialog('close');
  					}
  				}, {
  					text         : t('core', 'Yes'),
  					click        : function () {
  						if (callback !== undefined) {
  							callback(true, input.val());
  						}
  						$(dialogId).ocdialog('close');
  					},
  					defaultButton: true
  				}
  			];
  
  			$(dialogId).ocdialog({
  				closeOnEscape: true,
  				modal        : modal,
  				buttons      : buttonlist
  			});
  			OCdialogs.dialogsCounter++;
  		});

  	},
  	/**

  	 * 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 mimetypeFilter mimetype to filter by

  	 * @param modal make the dialog modal

  	*/

  	filepicker:function(title, callback, multiselect, mimetypeFilter, modal) {

  		var self = this;

  		// avoid opening the picker twice
  		if (this.filepicker.loading) {
  			return;
  		}
  		this.filepicker.loading = true;

  		$.when(this._getFilePickerTemplate()).then(function($tmpl) {

  			self.filepicker.loading = false;
  			var dialogName = 'oc-dialog-filepicker-content';

  			if(self.$filePicker) {
  				self.$filePicker.ocdialog('close');
  			}
  			self.$filePicker = $tmpl.octemplate({

  				dialog_name: dialogName,

  				title: title

  			}).data('path', '').data('multiselect', multiselect).data('mimetype', mimetypeFilter);

  
  			if (modal === undefined) {
  				modal = false;
  			}
  			if (multiselect === undefined) {
  				multiselect = false;
  			}

  			if (mimetypeFilter === undefined) {
  				mimetypeFilter = '';

  			}
  
  			$('body').append(self.$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: (4/5)*$(document).width(),

  				height: 420,
  				modal: modal,
  				buttons: buttonlist,

  				close: function() {

  					try {
  						$(this).ocdialog('destroy').remove();
  					} catch(e) {}
  					self.$filePicker = null;

  				}

  			});

  			if (!OC.Util.hasSVGSupport()) {
  				OC.Util.replaceSVG(self.$filePicker.parent());
  			}

  		})
  		.fail(function(status, error) {
  			// If the method is called while navigating away
  			// from the page, it is probably not needed ;)

  			self.filepicker.loading = false;

  			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, dialogType, buttons, callback, modal) {
  		return $.when(this._getMessageTemplate()).then(function($tmpl) {
  			var dialogName = 'oc-dialog-' + OCdialogs.dialogsCounter + '-content';
  			var dialogId = '#' + dialogName;

  			var $dlg = $tmpl.octemplate({

  				dialog_name: dialogName,

  				title: title,
  				message: content,

  				type: dialogType

  			});

  			if (modal === undefined) {
  				modal = false;
  			}
  			$('body').append($dlg);
  			var buttonlist = [];
  			switch (buttons) {

  			case OCdialogs.YES_NO_BUTTONS:
  				buttonlist = [{
  					text: t('core', 'No'),
  					click: function(){
  						if (callback !== undefined) {
  							callback(false);

  						}

  						$(dialogId).ocdialog('close');
  					}
  				},
  				{
  					text: t('core', 'Yes'),
  					click: function(){
  						if (callback !== undefined) {
  							callback(true);

  						}

  						$(dialogId).ocdialog('close');
  					},
  					defaultButton: true
  				}];
  				break;
  			case OCdialogs.OK_BUTTON:
  				var functionToCall = function() {
  					$(dialogId).ocdialog('close');
  					if(callback !== undefined) {
  						callback();
  					}
  				};
  				buttonlist[0] = {
  					text: t('core', 'Ok'),
  					click: functionToCall,
  					defaultButton: true
  				};

  				break;
  			}

  			$(dialogId).ocdialog({

  				closeOnEscape: true,
  				modal: modal,
  				buttons: buttonlist
  			});

  			OCdialogs.dialogsCounter++;

  		})
  		.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));

  			// 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 = original.directory + '/' +original.name;
  			Files.lazyLoadPreview(path, original.mimetype, 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) {

  				conflict.find('.replacement .mtime').css('font-weight', 'bold');

  			} else if (replacement.lastModifiedDate && replacement.lastModifiedDate.getTime() < original.mtime) {

  				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 dialogName = 'oc-dialog-fileexists-content';
  		var dialogId = '#' + dialogName;
  		if (this._fileexistsshown) {
  			// add conflict
  
  			var conflicts = $(dialogId+ ' .conflicts');
  			addConflict(conflicts, original, replacement);
  
  			var count = $(dialogId+ ' .conflict').length;
  			var title = n('core',
  							'{count} file conflict',
  							'{count} file conflicts',
  							count,
  							{count:count}
  						);
  			$(dialogId).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('core','One file conflict');
  				var $dlg = $tmpl.octemplate({
  					dialog_name: dialogName,
  					title: title,
  					type: 'fileexists',
  
  					allnewfiles: t('core','New Files'),
  					allexistingfiles: t('core','Already existing files'),
  
  					why: t('core','Which files do you want to keep?'),
  					what: t('core','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);

  				var buttonlist = [{
  						text: t('core', 'Cancel'),
  						classes: 'cancel',
  						click: function(){
  							if ( typeof controller.onCancel !== 'undefined') {
  								controller.onCancel(data);

  							}

  							$(dialogId).ocdialog('close');
  						}
  					},
  					{
  						text: t('core', 'Continue'),
  						classes: 'continue',
  						click: function(){
  							if ( typeof controller.onContinue !== 'undefined') {
  								controller.onContinue($(dialogId + ' .conflict'));

  							}

  							$(dialogId).ocdialog('close');
  						}
  					}];
  
  				$(dialogId).ocdialog({
  					width: 500,
  					closeOnEscape: true,
  					modal: true,
  					buttons: buttonlist,
  					closeButton: null,
  					close: function() {
  							self._fileexistsshown = false;

  							$(this).ocdialog('destroy').remove();
  						}

  				});

  				$(dialogId).css('height','auto');

  				//add checkbox toggling actions
  				$(dialogId).find('.allnewfiles').on('click', function() {
  					var checkboxes = $(dialogId).find('.conflict .replacement input[type="checkbox"]');
  					checkboxes.prop('checked', $(this).prop('checked'));
  				});
  				$(dialogId).find('.allexistingfiles').on('click', function() {
  					var checkboxes = $(dialogId).find('.conflict .original input[type="checkbox"]');
  					checkboxes.prop('checked', $(this).prop('checked'));
  				});
  				$(dialogId).find('.conflicts').on('click', '.replacement,.original', function() {
  					var checkbox = $(this).find('input[type="checkbox"]');
  					checkbox.prop('checked', !checkbox.prop('checked'));
  				});
  				$(dialogId).find('.conflicts').on('click', 'input[type="checkbox"]', function() {
  					var checkbox = $(this);
  					checkbox.prop('checked', !checkbox.prop('checked'));
  				});

  				//update counters
  				$(dialogId).on('click', '.replacement,.allnewfiles', function() {
  					var count = $(dialogId).find('.conflict .replacement input[type="checkbox"]:checked').length;
  					if (count === $(dialogId+ ' .conflict').length) {
  						$(dialogId).find('.allnewfiles').prop('checked', true);
  						$(dialogId).find('.allnewfiles + .count').text(t('core','(all selected)'));
  					} else if (count > 0) {
  						$(dialogId).find('.allnewfiles').prop('checked', false);
  						$(dialogId).find('.allnewfiles + .count').text(t('core','({count} selected)',{count:count}));
  					} else {
  						$(dialogId).find('.allnewfiles').prop('checked', false);
  						$(dialogId).find('.allnewfiles + .count').text('');
  					}

  				});

  				$(dialogId).on('click', '.original,.allexistingfiles', function(){
  					var count = $(dialogId).find('.conflict .original input[type="checkbox"]:checked').length;
  					if (count === $(dialogId+ ' .conflict').length) {
  						$(dialogId).find('.allexistingfiles').prop('checked', true);
  						$(dialogId).find('.allexistingfiles + .count').text(t('core','(all selected)'));
  					} else if (count > 0) {
  						$(dialogId).find('.allexistingfiles').prop('checked', false);
  						$(dialogId).find('.allexistingfiles + .count')
  							.text(t('core','({count} selected)',{count:count}));
  					} else {
  						$(dialogId).find('.allexistingfiles').prop('checked', false);
  						$(dialogId).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', 'list.php'),

  			{
  				dir: dir,
  				mimetypes: JSON.stringify(mimeType)

  			}

  		);
  	},

  
  	/**
  	 * 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.files, 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: relative_modified_date(entry.mtime/1000)

  				});

  				if (entry.isPreviewAvailable) {
  					var urlSpec = {
  						file: dir + '/' + entry.name
  					};
  					var previewUrl = OC.generateUrl('/core/preview.png?') + $.param(urlSpec);
  					$li.find('img').attr('src', previewUrl);
  				}
  				else {
  					$li.find('img').attr('src', OC.Util.replaceSVGIcon(entry.icon));
  				}

  				self.$filelist.append($li);
  			});
  
  			self.$filelist.removeClass('loading');

  			if (!OC.Util.hasSVGSupport()) {
  				OC.Util.replaceSVG(self.$filePicker.find('.dirtree'));
  			}

  		});

  	},

  	/**
  	 * 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');

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

  		}

  	}
  };