// jQuery UI style "widget" for managing the "xlsx-exporter"
$(function()
{
	// the widget definition, where "itop" is the namespace,
	// "tabularfieldsselector" the widget name
	$.widget( "itop.tabularfieldsselector",
	{
		// default options
		options:
		{
			fields: [],
			value_holder: '#tabular_fields',
			sample_data: [],
			total_count: 0,
			preview_limit: 3,
			labels: {
				preview_header: "Drag and drop the columns to change their order. Preview of %1$s lines. Total number of lines to export: %2$s",
				empty_preview: "Select the columns to be exported from the list above",
				columns_order: "Columns order",
				columns_selection: 'Available columns from %1$s',
				check_all: 'Check all',
				uncheck_all: 'Uncheck all',
				no_field_selected: 'Select at least one column to be exported'
			}
		},
	
		// the constructor
		_create: function()
		{
			var me = this;
			this._flatten_fields(this.options.fields);
			this.sId = this.element.attr('id');
			this.element
			.addClass('itop-tabularfieldsselector');
			this.element.parent().bind('form-part-activate', function() { me._update_from_holder(); me._update_preview(); });
			this.element.parent().bind('validate', function() { me.validate(); });
			
			this.aSelected = [];
			var sContent = '';
			
			for(var i in this.options.fields)
			{
				sContent += '<fieldset><legend>'+this._format(this.options.labels.columns_selection, i)+'</legend>';
				sContent += '<div style="text-align:right"><button class="check_all" type="button">'+this.options.labels.check_all+'</button>&nbsp;<button class="uncheck_all" type="button">'+this.options.labels.uncheck_all+'</button></div>';
				for(var j in this.options.fields[i])
				{
					sContent += this._get_field_checkbox(this.options.fields[i][j].code, this.options.fields[i][j].label, (this.options.fields[i][j].subattr.length > 0), false, null);					
				}
				sContent += '</fieldset>';
				this.element.append(sContent);
			}
			sContent = '<fieldset><legend>'+this.options.labels.columns_order+'</legend>';
			
			sContent += '<div class="preview_header">'+this._format(this.options.labels.preview_header, Math.min(this.options.preview_limit, this.options.total_count), this.options.total_count)+'</div>';
			sContent += '<div class="table_preview"></div>';
			sContent += '</fieldset>';
			this.element.append(sContent);
		
			this._update_from_holder();
			
			$('body').on('click change', '.tfs_checkbox', function() {
				var sInstanceId = $(this).attr('data-instance-id');
				if (sInstanceId != me.sId) return;
				me._on_click($(this));
			});
			
			var maxWidth = 0;
			$('#'+this.sId+' .tfs_checkbox, #'+this.sId+' .tfs_checkbox_multi').each(function() {
				maxWidth = Math.max(maxWidth, $(this).parent().width());
			});
			$('#'+this.sId+' .tfs_checkbox, #'+this.sId+' .tfs_checkbox_multi').each(function() {
				$(this).parent().parent().width(maxWidth).css({display: 'inline-block'});
			});

			$('#'+this.sId+' .tfs_checkbox_multi').click(function() {
				me._on_multi_click($(this).val(), this.checked);
			});
			$('#'+this.sId+' .check_all').click(function() {
				me._on_check_all($(this).closest('fieldset'), true);
			});
			$('#'+this.sId+' .uncheck_all').click(function() {
				me._on_check_all($(this).closest('fieldset'), false);
			});
			

			this._update_preview();
			this._make_tooltips();
		},
		_on_click: function(jItemClicked)
		{

			var bChecked = jItemClicked.prop('checked');
			var sValue = jItemClicked.val();
			this._mark_as_selected(sValue, bChecked);
			this._update_holder();
			this._update_preview();
			var sDataParent = jItemClicked.attr('data-parent');
			if (sDataParent != '')
			{
				this._update_tristate(sDataParent+'_multi');
			}
		},
		_on_multi_click: function(sMultiFieldCode, bChecked)
		{
			var oField = this._get_main_field_by_code(sMultiFieldCode);
			if (oField != null)
			{
				var sPrefix = '#tfs_'+this.sId+'_';
				for(var k in oField.subattr)
				{
					this._mark_as_selected(oField.subattr[k].code, bChecked);
					// In case the tooltip is visible, also update the checkboxes
					sElementId = (sPrefix+oField.subattr[k].code).replace('.', '_');
					$(sElementId).prop('checked', bChecked);
				}
				this._update_holder();
				this._update_preview();
			}
		},
		_on_check_all: function(jSelector, bChecked)
		{
			var me = this;
			jSelector.find('.tfs_checkbox').each(function() {
				$(this).prop('checked', bChecked);
				me._mark_as_selected($(this).val(), bChecked);
			});
			jSelector.find('.tfs_checkbox_multi').each(function() {
				var oField = me._get_main_field_by_code($(this).val());
				if (oField != null)
				{
					$(this).prop('checked', bChecked);
					$(this).prop('indeterminate', false);
					var sPrefix = '#tfs_'+this.sId+'_';
					for(var k in oField.subattr)
					{
						me._mark_as_selected(oField.subattr[k].code, bChecked);
						// In case the tooltip is visible, also update the checkboxes
						sElementId = (sPrefix+oField.subattr[k].code).replace('.', '_');
						$(sElementId).prop('checked', bChecked);
					}
				}				
			});
			this._update_holder();
			this._update_preview();
		},
		_update_tristate: function(sParentId)
		{
			// Check if the parent is checked, unchecked or indeterminate
			var sParentId = sParentId.replace('.', '_');
			var sAttCode = $('#'+sParentId).val();
			var oField = this._get_main_field_by_code(sAttCode);
			if (oField != null)
			{
				var iNbChecked = 0;
				var aDebug = [];
				for(var j in oField.subattr)
				{
					if ($.inArray(oField.subattr[j].code, this.aSelected) != -1)
					{
						aDebug.push(oField.subattr[j].code);
						iNbChecked++;
					}
				}
				if (iNbChecked == oField.subattr.length)
				{
					$('#'+sParentId).prop('checked', true);
					$('#'+sParentId).prop('indeterminate', false);
				}
				else if (iNbChecked == 0)
				{
					$('#'+sParentId).prop('checked', false);
					$('#'+sParentId).prop('indeterminate', false);
				}
				else
				{
					$('#'+sParentId).prop('checked', false);
					$('#'+sParentId).prop('indeterminate', true);
				}			
			}
		},
		_mark_as_selected: function(sValue, bSelected)
		{
			if(bSelected)
			{
				if ($.inArray(sValue, this.aSelected) == -1)
				{
					this.aSelected.push(sValue);					
				}
			}
			else
			{
				aSelected = [];
				for(var k in this.aSelected)
				{
					if (this.aSelected[k] != sValue)
					{
						aSelected.push(this.aSelected[k]);
					}
				}
				this.aSelected = aSelected;
			}			
		},
		_update_holder: function()
		{
			$(this.options.value_holder).val(this.aSelected.join(','));
		},
		_update_from_holder: function()
		{
			var sFields = $(this.options.value_holder).val();
			var bAdvanced = parseInt($(this.options.advanced_holder).val(), 10);

			if (sFields != '')
			{
				this.aSelected = sFields.split(',');
				var safeSelected = [];
				var me = this;
				var bModified = false;
				for(var k in this.aSelected)
				{
					var oField = this._get_field_by_code(this.aSelected[k])
					if (oField == null)
					{
						// Invalid field code supplied, don't copy it
						bModified = true;
					}
					else
					{
						safeSelected.push(this.aSelected[k]);
					}
				}
				if (bModified)
				{
					this.aSelected = safeSelected;
					this._update_holder();
				}
				$('#'+this.sId+' .tfs_checkbox').each(function() {
					if ($.inArray($(this).val(), me.aSelected) != -1)
					{
						$(this).prop('checked', true);
					}
					else
					{
						$(this).prop('checked', false);
					}
				});
			}
			var me = this;
			$('#'+this.sId+' .tfs_checkbox_multi').each(function() {
				me._update_tristate($(this).attr('id'));
			});

		},
		_update_preview: function()
		{
			var sHtml = '';
			if(this.aSelected.length > 0)
			{
				sHtml += '<table><thead><tr>';
				for(var k in this.aSelected)
				{
					var sField = this.aSelected[k];
					if ($.inArray(sField, this.aSelected) != -1)
					{
						var sRemoveBtn = '&nbsp;<span style="display:inline-block;float:right;cursor:pointer;" class="export-field-close" data-attcode="'+sField+'">×</span>';
						sHtml += '<th data-attcode="'+sField+'"><span class="drag-handle">'+this.aFieldsByCode[sField].unique_label+'</span>'+sRemoveBtn+'</th>';												
					}
				}
				sHtml += '</tr></thead><tbody>';
				
				for(var i=0; i<Math.min(this.options.preview_limit, this.options.total_count); i++)
				{
					sHtml += '<tr>';
					for(var k in this.aSelected)
					{
						var sField = this.aSelected[k];
						sHtml += '<td>'+this.options.sample_data[i][sField]+'</td>';
					}				
					sHtml += '</tr>';
				}
				
				sHtml += '</tbody></table>';
				
				$('#'+this.sId+' .preview_header').show();
				$('#'+this.sId+' .table_preview').html(sHtml);
				var me = this;
				$('#'+this.sId+' .table_preview table').dragtable({persistState: function(table) { me._on_drag_columns(table); }, dragHandle: '.drag-handle'});
				$('#'+this.sId+' .table_preview table .export-field-close').click( function(event) { me._on_remove_column($(this).attr('data-attcode')); event.preventDefault(); return false; } );
			}
			else
			{
				$('#'+this.sId+' .preview_header').hide();
				$('#'+this.sId+' .table_preview').html('<div class="export_empty_preview">'+this.options.labels.empty_preview+'</div>');
			}
		},
		_get_field_by_code: function(sFieldCode)
		{
			for(var k in this.aFieldsByCode)
			{
				if (k == sFieldCode)
				{
					return this.aFieldsByCode[k];
				}
			}
			return null;
		},
		_get_main_field_by_code: function(sFieldCode)
		{
			for(var i in this.options.fields)
			{
				for(var j in this.options.fields[i])
				{
					if (this.options.fields[i][j].code == sFieldCode)
					{
						return this.options.fields[i][j];
					}
				}
			}
			return null;
		},
		_on_drag_columns: function(table)
		{
			var me = this;
			me.aSelected = [];
			table.el.find('th').each(function(i) { 
				me.aSelected.push($(this).attr('data-attcode'));
			});
			this._update_holder();
		},
		_on_remove_column: function(sField)
		{
			var sElementId = this.sId+'_'+sField;
			sElementId = '#tfs_'+sElementId.replace('.', '_');
			$(sElementId).prop('checked', false);
			
			this._mark_as_selected(sField, false);
			this._update_holder();
			this._update_preview();
			var me = this;
			$('#'+this.sId+' .tfs_checkbox_multi').each(function() {
				me._update_tristate($(this).attr('id'));
			});
		},
		_format: function()
		{
			var s = arguments[0];
			for (var i = 0; i < arguments.length - 1; i++) {       
				var reg = new RegExp("%" + (i+1) + "\\$s", "gm");             
				s = s.replace(reg, arguments[i+1]);
			}
			return s;
		},
		validate: function()
		{
			if (this.aSelected.length == 0)
			{
				var aMessages = $('#export-form').data('validation_messages');
				aMessages.push(this.options.labels.no_field_selected);
				$('#export-form').data('validation_messages', aMessages);
			}
		},
		// events bound via _bind are removed automatically
		// revert other modifications here
		destroy: function()
		{
			this.element
			.removeClass('itop-tabularfieldsselector');
			
			this.element.parent().unbind('activate');
			this.element.parent().unbind('validate');
		},
		// _setOptions is called with a hash of all options that are changing
		_setOptions: function()
		{
			this._superApply(arguments);
		},
		// _setOption is called for each individual option that is changing
		_setOption: function( key, value )
		{
			if (key == 'fields')
			{
				this._flatten_fields(value);
			}
			this._superApply(arguments);
		},
		_flatten_fields: function(aFields)
		{
			// Update the "flattened" via of the fields
			this.aFieldsByCode = [];
			for(var k in aFields)
			{
				for(var i in aFields[k])
				{
					this.aFieldsByCode[aFields[k][i].code] = aFields[k][i];
					for(var j in aFields[k][i].subattr)
					{
						this.aFieldsByCode[aFields[k][i].subattr[j].code] = aFields[k][i].subattr[j];
					}
				}
			}
		},
		_make_tooltips: function()
		{
			var me  = this;
			$('#'+this.sId+' .tfs_advanced').tooltip({
				content: function() {
					var sDataAttcode = $(this).attr('data-attcode');
					var sTooltipContent = '';
					sTooltipContent += me._get_tooltip_content(sDataAttcode);
					return sTooltipContent;
				},
				items: '.tfs_advanced',
				position: {
					my: "center bottom-10",
					at: "center  top",					
					using: function( position, feedback ) { 
						$(this).css( position );  
						$( "<div>" )
						.addClass( "arrow" )
						.addClass( feedback.vertical )
						.addClass( feedback.horizontal )
						.appendTo( this );
						}
				}
			})
			.off( "mouseover mouseout" )
			.on( "mouseover", function(event){
				event.stopImmediatePropagation();
				var jMe = $(this);
				$(this).data('openTimeoutId', setTimeout(function() {
					var sDataId = jMe.attr('data-attcode');
					if ($('.tooltip-close-button[data-attcode="'+sDataId+'"]').length == 0)
					{
						jMe.tooltip('open');						
					}
				}, 500));					
			})
			.on( "mouseout", function(event){
				event.stopImmediatePropagation();
				clearTimeout($(this).data('openTimeoutId'));					
			});
			/*
			.on( "click", function(){
				var sDataId = $(this).attr('data-attcode');
				if ($('.tooltip-close-button[data-attcode="'+sDataId+'"]').length == 0)
				{
					$(this).tooltip( 'open' );							 
				}
				else
				{
					$(this).tooltip( 'close' );							 						
				}           
				$( this ).unbind( "mouseleave" );
				return false;	
			 });
			 */
		
			$('body').on('click', '.tooltip-close-button', function() {
				var sDataId = $(this).attr('data-attcode');
				$('#'+me.sId+' .tfs_advanced[data-attcode="'+sDataId+'"]').tooltip('close');
			});
		},
		_get_tooltip_content: function(sDataAttCode)
		{
			var oField = this._get_main_field_by_code(sDataAttCode);
			var sContent = '';
			if (oField != null)
			{
				sContent += '<div display:block;">'+oField.label+'<div class="tooltip-close-button" data-attcode="'+sDataAttCode+'" style="display:inline-block; float:right; cursor:pointer; padding-left:0.25em; padding-bottom:0.25em;">×</div></div>';
				for(var k in oField.subattr)
				{
					bChecked = ($.inArray(oField.subattr[k].code, this.aSelected) != -1);
					sContent += this._get_field_checkbox(oField.subattr[k].code, oField.subattr[k].label, false, bChecked, sDataAttCode);
				}
			}
			return sContent;
		},
		_get_field_checkbox: function(sCode, sLabel, bHasTooltip, bChecked, sParentId)
		{
			var sPrefix = 'tfs_'+this.sId+'_';
			sParentId = (sPrefix+sParentId).replace('.', '_');
			sElementId = (sPrefix+sCode).replace('.', '_');
			var aClasses = [];
			if (bHasTooltip)
			{
				aClasses.push('tfs_advanced');
				sLabel += ' [+]';
			}
			var sChecked = '';
			if (bChecked)
			{
				sChecked = ' checked ';
			}
			var sDataParent = '';
			if (sParentId != null)
			{
				sDataParent = ' data-parent="'+sParentId+'" ';
			}
			if (bHasTooltip)
			{
				sContent = '<div style="display:block; clear:both;"><span style="white-space: nowrap;"><input data-instance-id="'+this.sId+'" class="tfs_checkbox_multi" type="checkbox" id="'+sElementId+'_multi" value="'+sCode+'"'+sChecked+sDataParent+'><label data-attcode="'+sCode+'" class="'+aClasses.join(' ')+'" title="'+sCode+'">&nbsp;'+sLabel+'</label></div>';
			}
			else
			{
				sContent = '<div style="display:block; clear:both;"><span style="white-space: nowrap;"><input data-instance-id="'+this.sId+'" class="tfs_checkbox" type="checkbox" id="'+sElementId+'" value="'+sCode+'"'+sChecked+sDataParent+'><label data-attcode="'+sCode+'" class="'+aClasses.join(' ')+'" title="'+sCode+'" for="'+sElementId+'">&nbsp;'+sLabel+'</label></div>';				
			}
			return sContent;
		},
		_close_all_tooltips: function()
		{
			this.element.find('.tfs_item').tooltip('close');
		}
	});	
});