package chiralsoftware.pdf.ui;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.awt.Component;
import java.awt.Graphics2D;
import java.awt.Color;
import java.awt.geom.Rectangle2D;

import org.jboss.seam.pdf.ui.ITextComponent;
import org.jboss.seam.pdf.ui.UIDocument;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.DefaultFontMapper;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfTemplate;
import com.lowagie.text.Image;
import com.lowagie.text.ImgTemplate;


public class GraphicsTag extends ITextComponent  {

    private int height = 300;
    private int width  = 400;    

    public void setHeight(int height) {
        this.height = height;
    }
    
    public int getHeight() {
        return (Integer) valueBinding(FacesContext.getCurrentInstance(), "height", height);
    }

    public void setWidth(int width) {
        this.width = width;
    }
    
    public int getWidth() {
        return (Integer) valueBinding(FacesContext.getCurrentInstance(), "width", width);        
    }

    private Component component;

    public void setComponent(Component component) { 
	this.component = component; 
    }

    public Component getComponent() {
        return (Component) valueBinding(FacesContext.getCurrentInstance(), 
					"component",component);
    }

    @Override
    public void createITextObject(FacesContext context) {
	// don't use the component variable directly!
	// we need to check for the valueBinding
	Component component = getComponent();

	if(component == null) { 
	    System.out.println("Warning: component was null."); return; 
	}

	final UIDocument doc = (UIDocument) findITextParent(getParent(), UIDocument.class);
	if (doc != null) {
	    final PdfWriter writer = (PdfWriter) doc.getWriter();
	    final PdfContentByte cb = writer.getDirectContent();
	    final PdfTemplate tp = cb.createTemplate(getWidth(), getHeight()); 
	    final Graphics2D g2 = tp.createGraphics(getWidth(),getHeight());
	    
	    // setSize() is very important.  The default size
	    // for this component is zero, which means it will not display
	    // unless the size is set
	    component.setSize(getWidth(), getHeight());
	    component.paint(g2); 
	    g2.dispose(); 

	    try { image = new ImgTemplate(tp); }
	    catch(Exception e) {
		System.out.println(e.getMessage());
	    }
	
	}
    }

    private Image image = null;

    @Override
    public void handleAdd(Object arg0) {
        throw new RuntimeException("No children allowed");
    }

    @Override
    public void removeITextObject() {
	image = null;
    }

    /** This must return a com.lowagie.text.Element object,
     * or else it will throw a IllegalArgumentException("cannot add " + o) */
    @Override
    public Object getITextObject() {
        return image;
    }

}