if (chartDataEditor == null) var chartDataEditor = {};

openxava.addEditorInitFunction(function() { 
	if ($('#xava_application').length &&
			$('#xava_module').length) {
		if (navigator.userAgent.indexOf("HtmlUnit") >= 0) return; 
		var applicationName = $('#xava_application').val();
		var moduleName = $('#xava_module').val();
		var xavaChartPrefix = openxava.decorateId(applicationName, moduleName, "xava_chart__");
		var idPrefix = "#" + xavaChartPrefix;
		if ($(idPrefix + 'type').length) {
			var chartType = $(idPrefix + 'type').val();
			var grouped = $(idPrefix + 'grouped').val();
			var specification = chartDataEditor.render(applicationName, moduleName, chartType, xavaChartPrefix); 
			if (specification != 'empty') {
				c3.generate(specification);
			}
		}
	}
});

chartDataEditor.render = function(application, module, chartType, xavaChartPrefix) { 
	var idPrefix = "#" + xavaChartPrefix;
	var rowCount = $(idPrefix + "rowCount").val();
	var columnCount = $(idPrefix + "columnCount").val();
	var specification='empty';
	if (rowCount > 0 && columnCount > 0) {
		specification = {
				bindto:idPrefix + "container",
				data:{
					columns:[],
					type:chartType
				},
				axis: {
					x: {
						type: 'categories'
					}
				},
				pie: {
			        label: {
			            format: function (value, ratio, id) {
			                return value;
			            }
			        }
			    }
		};
		if (chartType == "pie") {
			var labels = [];
			for (var index = 0; index < rowCount; index++) {
				specification.data.columns[index]=[];
				var label = $(idPrefix + "title_" + index).val();
				var value = $(idPrefix + "dataset_0_value_" + index).val();
				var existingIndex = labels.indexOf(label); 
				if (existingIndex < 0) {
					labels.push(label);
					specification.data.columns[index][0]=label;
					specification.data.columns[index][1]=new Number(value);
				}
				else {
					specification.data.columns[existingIndex][0]=label;
					specification.data.columns[existingIndex][specification.data.columns[existingIndex].length]=new Number(value);					
				}
			}		
		}
		else {
			specification.data.x = 'x';
			var index = 0;		
			specification.data.columns[0]=['x'];
			for (index = 0; index < columnCount; index++) {
				var category = $(idPrefix + "dataset_" + index + "_title").val();
				specification.data.columns[index + 1]=[];
				var rowIndex = 0;
				for (rowIndex = 0; rowIndex < rowCount; rowIndex++) {
					var label = $(idPrefix + "title_" + rowIndex).val();
					if (index == 0) {
						specification.data.columns[0][rowIndex + 1] = label;
					}
					if (rowIndex == 0) {
						specification.data.columns[index + 1][0] = category;
					}
					var value = $(idPrefix + "dataset_" + index + "_value_" + rowIndex).val();
					specification.data.columns[index + 1][rowIndex + 1]=new Number(value);
				}
			}
		} 
		
	}
	return specification;
}