package int_2.servlets.assignments1;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.awt.*;
import java.awt.image.*;
import com.sun.image.codec.jpeg.*;
import java.sql.*;
import java.util.*;

import int_2.servlets.*;
import int_2.tools.*;
import int_2.tools.graphics.*;


/**
Please respect the copyright of this code. It is not allowed to copy this code and use at any circumstances.
@author		<a href="mailto:fredand44@hotmail.com">&copy; Fredrik Andersson</a><br>

This servlet uses code from my home made toolbox that you can find in the folder 8/tools and 8/beans.
The toolbox is not ready yet, I have been working for it for a couple of years when I have time.
The goal is to get a toolbox of classes so it will be easier to map tasks to
use-case-diagram.

This class draw a circle digram with a random result.
*/
public class DynamicGraphics_1c extends GeneralServlet
{
	public void start(HttpServletRequest request, HttpServletResponse response) throws IOException
	{
		System.setProperty("java.awt.headless", "true");
		ServletOutputStream servletOutputStream = response.getOutputStream();
		response.setContentType("image/jpeg");

		BufferedImage bufferedImage = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
		Graphics graphics = bufferedImage.getGraphics();

		Form form = FormManager.collectForm(request);

		DiagramDataList diagramDataList = new DiagramDataList();
		for(int i = 0; i < 10; i++)
		{
			diagramDataList.add( new DiagramData(getRandomDouble(), ""+i) );
		}
		diagramDataList.setPercents();
		diagramDataList.bubbleSort();
		diagramDataList.setAngles();

		CircleDiagramImageCreator circleDiagramImageCreator = new CircleDiagramImageCreator(200, 200, diagramDataList);
		circleDiagramImageCreator.createBackBufferAndbackBufferGraphics2D();
		circleDiagramImageCreator.drawOnBackBuffer();

		graphics.drawImage(circleDiagramImageCreator.getImage(), 0, 0, null);

		JPEGCodec.createJPEGEncoder(servletOutputStream).encode(bufferedImage);

		servletOutputStream.close();
	}

	public double getRandomDouble()
	{
		return Math.random() * 10;
	}
}
/*
En variant

    try
    {
    	ServletUtils.returnFile(req.getRealPath(imagePath), out);
    }
    catch (FileNotFoundException e)
    {

    }
*/