/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.pdfbox.pdmodel.fdf;

import java.awt.Color;
import java.io.IOException;

import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.w3c.dom.Element;

/**
 * This represents a Circle FDF annotation.
 *
 * @author Ben Litchfield
 */
public class FDFAnnotationCircle extends FDFAnnotation
{
    /**
     * COS Model value for SubType entry.
     */
    public static final String SUBTYPE = "Circle";

    /**
     * Default constructor.
     */
    public FDFAnnotationCircle()
    {
        super();
        annot.setName(COSName.SUBTYPE, SUBTYPE);
    }

    /**
     * Constructor.
     *
     * @param a An existing FDF Annotation.
     */
    public FDFAnnotationCircle(COSDictionary a)
    {
        super(a);
    }

    /**
     * Constructor.
     *
     * @param element An XFDF element.
     *
     * @throws IOException If there is an error extracting information from the element.
     */
    public FDFAnnotationCircle(Element element) throws IOException
    {
        super(element);
        annot.setName(COSName.SUBTYPE, SUBTYPE);

        String color = element.getAttribute("interior-color");
        if (color != null && color.length() == 7 && color.charAt(0) == '#')
        {
            int colorValue = Integer.parseInt(color.substring(1, 7), 16);
            setInteriorColor(new Color(colorValue));
        }

        initFringe(element);
    }
    
    private void initFringe(Element element) throws IOException
    {
        String fringe = element.getAttribute("fringe");
        if (fringe != null && !fringe.isEmpty())
        {
            String[] fringeValues = fringe.split(",");
            if (fringeValues.length != 4)
            {
                throw new IOException("Error: wrong amount of numbers in attribute 'fringe'");
            }
            PDRectangle rect = new PDRectangle();
            rect.setLowerLeftX(Float.parseFloat(fringeValues[0]));
            rect.setLowerLeftY(Float.parseFloat(fringeValues[1]));
            rect.setUpperRightX(Float.parseFloat(fringeValues[2]));
            rect.setUpperRightY(Float.parseFloat(fringeValues[3]));
            setFringe(rect);
        }
    }

    /**
     * This will set interior color of the drawn area.
     *
     * @param color The interior color of the circle.
     */
    public final void setInteriorColor(Color color)
    {
        COSArray array = null;
        if (color != null)
        {
            float[] colors = color.getRGBColorComponents(null);
            array = new COSArray();
            array.setFloatArray(colors);
        }
        annot.setItem(COSName.IC, array);
    }

    /**
     * This will retrieve the interior color of the drawn area.
     *
     * @return object representing the color.
     */
    public Color getInteriorColor()
    {
        Color retval = null;
        COSArray array = annot.getCOSArray(COSName.IC);
        if (array != null)
        {
            float[] rgb = array.toFloatArray();
            if (rgb.length >= 3)
            {
                retval = new Color(rgb[0], rgb[1], rgb[2]);
            }
        }
        return retval;
    }

    /**
     * This will set the fringe rectangle. Giving the difference between the annotations rectangle and where the drawing
     * occurs. (To take account of any effects applied through the BE entry for example)
     *
     * @param fringe the fringe
     */
    public final void setFringe(PDRectangle fringe)
    {
        annot.setItem(COSName.RD, fringe);
    }

    /**
     * This will get the fringe. Giving the difference between the annotations rectangle and where the drawing occurs.
     * (To take account of any effects applied through the BE entry for example)
     *
     * @return the rectangle difference
     */
    public PDRectangle getFringe()
    {
        COSArray rd = annot.getCOSArray(COSName.RD);
        return rd != null ? new PDRectangle(rd) : null;
    }
}
