/*
 * SVG Salamander
 * Copyright (c) 2004, Mark McKay
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or 
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 *   - Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the following
 *     disclaimer.
 *   - Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials 
 *     provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE. 
 * 
 * Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
 * projects can be found at http://www.kitfox.com
 *
 * Created on February 20, 2004, 10:00 PM
 */
package com.kitfox.svg;

import com.kitfox.svg.app.data.Handler;
import com.kitfox.svg.xml.StyleAttribute;
import java.awt.AlphaComposite;
import java.awt.Composite;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.net.URI;
import java.net.URL;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Implements an image.
 *
 * @author Mark McKay
 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
 */
public class ImageSVG extends RenderableElement
{
    public static final String TAG_NAME = "image";
    
    float x = 0f;
    float y = 0f;
    float width = 0f;
    float height = 0f;
//    BufferedImage href = null;
    URL imageSrc = null;
    AffineTransform xform;
    Rectangle2D bounds;

    /**
     * Creates a new instance of Font
     */
    public ImageSVG()
    {
    }

    @Override
    public String getTagName()
    {
        return TAG_NAME;
    }

    @Override
    protected void build() throws SVGException
    {
        super.build();

        StyleAttribute sty = new StyleAttribute();

        if (getPres(sty.setName("x")))
        {
            x = sty.getFloatValueWithUnits();
        }

        if (getPres(sty.setName("y")))
        {
            y = sty.getFloatValueWithUnits();
        }

        if (getPres(sty.setName("width")))
        {
            width = sty.getFloatValueWithUnits();
        }

        if (getPres(sty.setName("height")))
        {
            height = sty.getFloatValueWithUnits();
        }

        try
        {
            if (getPres(sty.setName("xlink:href")))
            {
                URI src = sty.getURIValue(getXMLBase());
                if ("data".equals(src.getScheme()))
                {
                    imageSrc = new URL(null, src.toASCIIString(), new Handler());
                } else
                {
                    try
                    {
                        imageSrc = src.toURL();
                    } catch (Exception e)
                    {
                        Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
                            "Could not parse xlink:href " + src, e);
//                        e.printStackTrace();
                        imageSrc = null;
                    }
                }
            }
        } catch (Exception e)
        {
            throw new SVGException(e);
        }

        diagram.getUniverse().registerImage(imageSrc);

        //Set widths if not set
        BufferedImage img = diagram.getUniverse().getImage(imageSrc);
        if (img == null)
        {
            xform = new AffineTransform();
            bounds = new Rectangle2D.Float();
            return;
        }

        if (width == 0)
        {
            width = img.getWidth();
        }
        if (height == 0)
        {
            height = img.getHeight();
        }

        //Determine image xform
        xform = new AffineTransform();
//        xform.setToScale(this.width / img.getWidth(), this.height / img.getHeight());
//        xform.translate(this.x, this.y);
        xform.translate(this.x, this.y);
        xform.scale(this.width / img.getWidth(), this.height / img.getHeight());

        bounds = new Rectangle2D.Float(this.x, this.y, this.width, this.height);
    }

    public float getX()
    {
        return x;
    }

    public float getY()
    {
        return y;
    }

    public float getWidth()
    {
        return width;
    }

    public float getHeight()
    {
        return height;
    }

    @Override
    void pick(Point2D point, boolean boundingBox, List<List<SVGElement>> retVec) throws SVGException
    {
        if (getBoundingBox().contains(point))
        {
            retVec.add(getPath(null));
        }
    }

    @Override
    void pick(Rectangle2D pickArea, AffineTransform ltw, boolean boundingBox, List<List<SVGElement>> retVec) throws SVGException
    {
        if (ltw.createTransformedShape(getBoundingBox()).intersects(pickArea))
        {
            retVec.add(getPath(null));
        }
    }

    @Override
    public void render(Graphics2D g) throws SVGException
    {
        StyleAttribute styleAttrib = new StyleAttribute();
        if (getStyle(styleAttrib.setName("visibility")))
        {
            if (!styleAttrib.getStringValue().equals("visible"))
            {
                return;
            }
        }

        if (getStyle(styleAttrib.setName("display")))
        {
            if (styleAttrib.getStringValue().equals("none"))
            {
                return;
            }
        }

        beginLayer(g);

        float opacity = 1f;
        if (getStyle(styleAttrib.setName("opacity")))
        {
            opacity = styleAttrib.getRatioValue();
        }

        if (opacity <= 0)
        {
            return;
        }

        Composite oldComp = null;

        if (opacity < 1)
        {
            oldComp = g.getComposite();
            Composite comp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, opacity);
            g.setComposite(comp);
        }

        BufferedImage img = diagram.getUniverse().getImage(imageSrc);
        if (img == null)
        {
            return;
        }

        AffineTransform curXform = g.getTransform();
        g.transform(xform);

        g.drawImage(img, 0, 0, null);

        g.setTransform(curXform);
        if (oldComp != null)
        {
            g.setComposite(oldComp);
        }

        finishLayer(g);
    }

    @Override
    public Rectangle2D getBoundingBox()
    {
        return boundsToParent(bounds);
    }

    /**
     * Updates all attributes in this diagram associated with a time event. Ie,
     * all attributes with track information.
     *
     * @return - true if this node has changed state as a result of the time
     * update
     */
    @Override
    public boolean updateTime(double curTime) throws SVGException
    {
//        if (trackManager.getNumTracks() == 0) return false;
        boolean changeState = super.updateTime(curTime);

        //Get current values for parameters
        StyleAttribute sty = new StyleAttribute();
        boolean shapeChange = false;

        if (getPres(sty.setName("x")))
        {
            float newVal = sty.getFloatValueWithUnits();
            if (newVal != x)
            {
                x = newVal;
                shapeChange = true;
            }
        }

        if (getPres(sty.setName("y")))
        {
            float newVal = sty.getFloatValueWithUnits();
            if (newVal != y)
            {
                y = newVal;
                shapeChange = true;
            }
        }

        if (getPres(sty.setName("width")))
        {
            float newVal = sty.getFloatValueWithUnits();
            if (newVal != width)
            {
                width = newVal;
                shapeChange = true;
            }
        }

        if (getPres(sty.setName("height")))
        {
            float newVal = sty.getFloatValueWithUnits();
            if (newVal != height)
            {
                height = newVal;
                shapeChange = true;
            }
        }

        try
        {
            if (getPres(sty.setName("xlink:href")))
            {
                URI src = sty.getURIValue(getXMLBase());

                URL newVal;
                if ("data".equals(src.getScheme()))
                {
                    newVal = new URL(null, src.toASCIIString(), new Handler());
                } else
                {
                    newVal = src.toURL();
                }

                if (!newVal.equals(imageSrc))
                {
                    imageSrc = newVal;
                    shapeChange = true;
                }
            }
        } catch (IllegalArgumentException ie)
        {
            Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
                "Image provided with illegal value for href: \""
                + sty.getStringValue() + '"', ie);
        } catch (Exception e)
        {
            Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
                "Could not parse xlink:href", e);
        }


        if (shapeChange)
        {
            build();
//            diagram.getUniverse().registerImage(imageSrc);
//
//            //Set widths if not set
//            BufferedImage img = diagram.getUniverse().getImage(imageSrc);
//            if (img == null)
//            {
//                xform = new AffineTransform();
//                bounds = new Rectangle2D.Float();
//            }
//            else
//            {
//                if (width == 0) width = img.getWidth();
//                if (height == 0) height = img.getHeight();
//
//                //Determine image xform
//                xform = new AffineTransform();
////                xform.setToScale(this.width / img.getWidth(), this.height / img.getHeight());
////                xform.translate(this.x, this.y);
//                xform.translate(this.x, this.y);
//                xform.scale(this.width / img.getWidth(), this.height / img.getHeight());
//
//                bounds = new Rectangle2D.Float(this.x, this.y, this.width, this.height);
//            }
//
//            return true;
        }

        return changeState || shapeChange;
    }
}