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/**
 * Copyright 2015-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.beryx.viewreka.fxui.chart.xy;

import static org.beryx.viewreka.core.Util.check;
import static org.beryx.viewreka.core.Util.checkNotNull;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import javafx.scene.chart.XYChart;
import javafx.scene.layout.Pane;

import org.beryx.viewreka.chart.ChartController;
import org.beryx.viewreka.fxui.chart.AbstractFxChartBuilder;

/**
 * A chart builder for {@link XYChart}s.
 * @param  the type of the X axis
 * @param  the type of the Y axis
 */
public class XYChartBuilder extends AbstractFxChartBuilder> {
	private SeriesDataBuilder seriesDataBuilder;
	private final Map chartCreators = new LinkedHashMap<>();

	private final Map> seriesConfigMap = new LinkedHashMap<>();

	@Override
	public ChartController> createController(Pane chartParentPane) {
		checkNotNull(seriesDataBuilder, "seriesDataBuilder");
		checkNotNull(seriesDataBuilder.getXAxisBuilder(), "xAxisBuilder");
		checkNotNull(seriesDataBuilder.getYAxisBuilder(), "yAxisBuilder");
		check(!chartCreators.isEmpty(), "chartCreators is empty");

		XYChartCreator chartCreator = null;
		String currentStyle = getCurrentChartStyle();
		if(currentStyle != null) {
			chartCreator = chartCreators.get(currentStyle);
		}
		if(chartCreator == null) {
			Entry entry = chartCreators.entrySet().iterator().next();
			currentStyle = entry.getKey();
			chartCreator = entry.getValue();
		}
		return new XYChartController<>(chartParentPane, seriesConfigMap, seriesDataBuilder, chartCreator, getTitleSupplier(), getStylesheetSupplier());
	}

	/**
	 * @return the builder used to create series data and the X and Y axes
	 */
	public SeriesDataBuilder getSeriesDataBuilder() {
		return seriesDataBuilder;
	}
	/**
	 * @param seriesDataBuilder the builder used to create series data and the X and Y axes
	 */
	public void setSeriesDataBuilder(SeriesDataBuilder seriesDataBuilder) {
		this.seriesDataBuilder = seriesDataBuilder;
	}

	@Override
	public List getChartStyles() {
		return new ArrayList<>(chartCreators.keySet());
	}

	/**
	 * Retrieves the chart creators
	 * @return a map of {@link XYChartCreator}s indexed by their names
	 */
	public Map getChartCreators() {
		return chartCreators;
	}

	/**
	 * Retrieves the map of chart series configurations.
	 * @return a map of {@link SeriesConfig}s indexed by their names
	 */
	public Map> getSeriesConfigMap() {
		return seriesConfigMap;
	}
}