/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2014 by RapidMiner and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapidminer.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.new_plotter.engine.jfreechart.renderer;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;
import java.util.List;

import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.CategoryItemRendererState;
import org.jfree.chart.renderer.category.ScatterRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.util.ShapeUtilities;

import com.rapidminer.gui.new_plotter.engine.jfreechart.RenderFormatDelegate;
import com.rapidminer.gui.new_plotter.engine.jfreechart.dataset.ValueSourceToMultiValueCategoryDatasetAdapter;
import com.rapidminer.gui.new_plotter.utility.DataStructureUtils;

/**
 * This renderer less flat than most other {@link FormattedRenderer}s, since
 * by default the ScatterRenderer draws all items in a category with
 * the same shape and color. This renderer overwrites the drawItem().
 * 
 * Needs a {@link ValueSourceToMultiValueCategoryDatasetAdapter} as dataset.
 * 
 * @author Marius Helf
 *
 */
public class FormattedScatterRenderer extends ScatterRenderer implements FormattedRenderer {
	private static final long serialVersionUID = 1L;
	
	
	private RenderFormatDelegate formatDelegate = new RenderFormatDelegate();

	public FormattedScatterRenderer() {
		super();
	}

	@Override
	public RenderFormatDelegate getFormatDelegate() {
		return formatDelegate;
	}

	@Override
	public Paint getItemPaint(int seriesIdx, int valueIdx) {
		Paint paint = getFormatDelegate().getItemPaint(seriesIdx, valueIdx);
		if (paint == null) {
			paint = super.getItemPaint(seriesIdx, valueIdx);
		}
		return paint;
	}
	
	@Override 
	public Shape getItemShape(int seriesIdx, int valueIdx) {
		Shape shapeFromDelegate = getFormatDelegate().getItemShape(seriesIdx, valueIdx);
		if (shapeFromDelegate == null) {
			return super.getItemShape(seriesIdx, valueIdx);
		} else {
			return shapeFromDelegate;
		}
	}
	

	/**
	 * This function is taken directly from JFreeChart with adjustments to draw
	 * differently colored items.
	 * 
	 * When updating JFreeChart this function must probably be adapted.
	 *  
	 */
	@Override
    public void drawItem(Graphics2D g2, CategoryItemRendererState state,
            Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis,
            ValueAxis rangeAxis, CategoryDataset dataset, int row, int column,
            int pass) {

        // do nothing if item is not visible
		if (!getItemVisible(row, column)) {
            return;
        }
        int visibleRow = state.getVisibleSeriesIndex(row);
        if (visibleRow < 0) {
            return;
        }
        int visibleRowCount = state.getVisibleSeriesCount();

        PlotOrientation orientation = plot.getOrientation();

        ValueSourceToMultiValueCategoryDatasetAdapter dataSet = (ValueSourceToMultiValueCategoryDatasetAdapter)dataset;
        List values = dataSet.getValues(row, column);
        if (values == null) {
            return;
        }
        int valueCount = values.size();
        for (int i = 0; i < valueCount; i++) {
            // current data point...
            double x1;
            if (getUseSeriesOffset()) {
                x1 = domainAxis.getCategorySeriesMiddle(column,dataset.getColumnCount(),
						visibleRow, visibleRowCount,
                        getItemMargin(), dataArea, plot.getDomainAxisEdge());
            }
            else {
                x1 = domainAxis.getCategoryMiddle(column, getColumnCount(),
                        dataArea, plot.getDomainAxisEdge());
            }
            Number n = (Number)values.get(i);
            int idx = dataSet.getValueIndex(row, column, i);
            double value = n.doubleValue();
            double y1 = rangeAxis.valueToJava2D(value, dataArea,
                    plot.getRangeAxisEdge());

            Shape shape = getItemShape(row, idx);
            if (orientation == PlotOrientation.HORIZONTAL) {
                shape = ShapeUtilities.createTranslatedShape(shape, y1, x1);
            }
            else if (orientation == PlotOrientation.VERTICAL) {
                shape = ShapeUtilities.createTranslatedShape(shape, x1, y1);
            }
            if (getItemShapeFilled(row, column)) {
                if (getUseFillPaint()) {
                    g2.setPaint(getItemFillPaint(row, column));
                }
                else {
                    g2.setPaint(getItemPaint(row, idx));
                }
                g2.fill(shape);
            }
            if (getDrawOutlines()) {
                if (getUseOutlinePaint()) {
                    g2.setPaint(getItemOutlinePaint(row, column));
                }
                else {
                    g2.setPaint(getItemPaint(row, idx));
                }
                g2.setStroke(getItemOutlineStroke(row, column));
                g2.draw(shape);
            }
        }
    }
	
	@Override
	public Paint getItemOutlinePaint(int seriesIdx, int valueIdx) {
		if (getFormatDelegate().isItemSelected(seriesIdx, valueIdx)) {
			return super.getItemOutlinePaint(seriesIdx, valueIdx);
		} else {
			return DataStructureUtils.setColorAlpha(Color.LIGHT_GRAY, 20);
		}
	}
}