// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.core.util;

import java.io.*;

/**
 * SizeWidthHeight is a value object representing Width and Height preferences.
 * Note that a null Width or Height means "no preference".
 */
public class SizeWidthHeight implements Serializable
{
    private static final long serialVersionUID = 1L;

    public static final SizeWidthHeight NULL = new SizeWidthHeight( null, null );

    private /* final */ Integer mWidth;
    private /* final */ Integer mHeight;

    @SuppressWarnings({"deprecation", "UnusedDeclaration"}) @Deprecated /** for Serialization */
    protected SizeWidthHeight()
    {
    }

    /**
     * Constructs and initializes an instance for the given width and height.
     */
    public SizeWidthHeight( Integer pWidth, Integer pHeight )
    {
        mWidth = pWidth;
        mHeight = pHeight;
    }

    /**
     * Constructs and initializes an instance for the given width and height.
     */
    public SizeWidthHeight( int pWidth, int pHeight )
    {
        this( new Integer( pWidth ), new Integer( pHeight ) );
    }

    /**
     * Returns the height value as an Integer.  Null means "no preference".
     */
    public Integer getHeight()
    {
        return mHeight;
    }

    /**
     * Returns the width value as an Integer.  Null means "no preference".
     */
    public Integer getWidth()
    {
        return mWidth;
    }

    /**
     * Returns the height value as an int.  -1 means "no preference".
     */
    public int getIntHeight()
    {
        return deNull( mHeight );
    }

    /**
     * Returns the width value as an int.  -1 means "no preference".
     *
     * @return width as an Integer; null if "no preference".
     */
    public int getIntWidth()
    {
        return deNull( mWidth );
    }

    private int deNull( Integer pInteger )
    {
        return (pInteger == null) ? -1 : pInteger.intValue();
    }

    public SizeWidthHeight maximum( SizeWidthHeight pThem )
    {
        if ( pThem != null )
        {
            boolean update = false;
            // Width
            Integer newWidth = this.getWidth();
            if ( pThem.getIntWidth() > this.getIntWidth() )
            {
                newWidth = pThem.getWidth();
                update = true;
            }
            // Height
            Integer newHeight = this.getHeight();
            if ( pThem.getIntHeight() > this.getIntHeight() )
            {
                newHeight = pThem.getHeight();
                update = true;
            }
            if ( update )
            {
                return new SizeWidthHeight( newWidth, newHeight );
            }
        }
        return this;
    }

    public int area()
    {
        int w = getIntWidth();
        int h = getIntHeight();
        return ((w < 1) || (h < 1)) ? 0 : (w * h);
    }

    public String toString()
    {
        return "(" + mWidth + ":W-H:" + mHeight + ")";
    }
}