package edu.lovo.demo;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class TestValidateServlet extends HttpServlet {

	
	public void service(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String[] validates = {
				"A","B","C","D","E","F","G","H",
				"I","J","K","L","M","N","O","P",
				"Q","R","S","T","U","V","W","X",
				"Y","Z","0","1","2","3","4","5",
				"6","7","8","9",
//				"ㅂ","ㅈ","ㄷ","ㄱ","ㅅ","ㅛ","ㅕ","ㅑ","ㅐ","ㅔ","ㅁ","ㄴ",
//				"ㅇ","ㄹ","ㅎ","ㅗ","ㅓ","ㅏ","ㅣ","ㅋ","ㅌ","ㅊ","ㅍ","ㅠ",
//				"ㅜ","ㅡ","1","3",
		        };
		
		Random r = new Random();
		String validateCode = "";
		for(int i = 0; i < 4; i++){
			validateCode += validates[r.nextInt(validates.length)];
		}
		
		BufferedImage image = new BufferedImage(80, 20, BufferedImage.TYPE_INT_RGB);
		
		Graphics g = image.getGraphics();
		
		g.setColor(new Color(0xDCDCDC));
	    g.fillRect(0, 0, 80, 20);
	     
		g.setFont(new Font("Atlantic Inline", Font.PLAIN, 18));
		g.setColor(Color.RED);
		String str = validateCode.substring(0,1);
		g.drawString(str, 8, 15);
		str = validateCode.substring(1,2);
		g.drawString(str, 28, 15);
		str = validateCode.substring(2, 3);
		g.drawString(str, 46, 15);
		str = validateCode.substring(3, 4);
		g.drawString(str, 64, 15);
		
		g.dispose();
		
		HttpSession session = request.getSession(true);
		session.removeAttribute("validate");
		
		session.setAttribute("validate", validateCode);
		
		ImageIO.write(image, "JPEG", response.getOutputStream());
	
	}

}