/**
 * Copyright 2010-2013 Jingjing Li.
 *
 * This file is part of jplot2d.
 *
 * jplot2d is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 *
 * jplot2d 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 General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with jplot2d. If not, see .
 */
package org.jplot2d.renderer;

import java.awt.Dimension;
import java.awt.Graphics2D;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.List;
import java.awt.*;

import org.jplot2d.element.impl.ComponentEx;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;

/**
 * Export plot image to a png file.
 * 
 * @author Jingjing Li
 * 
 */
public class PdfExporter extends Renderer {

	private final OutputStream os;

	private String title;

	public PdfExporter(String pathname) throws FileNotFoundException {
		this(new File(pathname));
	}

	public PdfExporter(File file) throws FileNotFoundException {
		this(new FileOutputStream(file));
	}

	public PdfExporter(OutputStream out) {
		super();
		os = new BufferedOutputStream(out);
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	@Override
	public void render(ComponentEx comp, List cacheBlockList) {

		Dimension size = getDeviceBounds(comp).getSize();

		Document document = new Document(new Rectangle(size.width, size.height), 0, 0, 0, 0);
		PdfWriter writer = null;
		try {
			writer = PdfWriter.getInstance(document, os);
		} catch (DocumentException e) {
			/*
			 * should not happen but if it happens it should be notified to the integration instead of leaving it
			 * half-done and tell nothing.
			 */
			throw new RuntimeException("Error creating PDF document", e);
		}

		document.open();
		if (title != null) {
			document.addTitle(title);
		}
		PdfContentByte cb = writer.getDirectContent();
		Graphics2D g = cb.createGraphics(size.width, size.height);
                //g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

		for (CacheableBlock cblock : cacheBlockList) {
			List sublist = cblock.getSubcomps();
			for (ComponentEx subcomp : sublist) {
				subcomp.draw(g);
			}
		}

		g.dispose();
		document.close();
	}

}