package com.pollex.pam.service.util;

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

public final class VerifyCodeUtil {

	
	public static String createcode() {
		String code = "";
		code = "";
		String randomRange = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";// Randomly generated character
																					// range (0-9, a-z, A-Z)

		// The number of digits for generating the verification code (here 4 digits)
		for (int i = 0; i < 4; i++) {
			int index = (int) (Math.random() * 62);// Will produce a [0,62) number, excluding decimals
			char randomCode = randomRange.charAt(index);
			code = code + randomCode;
		}
		return code;
	}

	// 3. Generate pictures
	public static BufferedImage createimage(String code) {
		// The first 2 parameters are: width, height. The back is the image type
		// Create a BufferedImage object without transparent color, TYPE_INT_ARGB is
		// with transparent color
		BufferedImage bi = new BufferedImage(130, 50, BufferedImage.TYPE_INT_RGB);

		// 1. Get a canvas
		Graphics g = bi.getGraphics();
		// 2. Add background color
		g.setColor(Color.WHITE);
		g.fillRect(0, 0, 130, 50);

		// 3. Add interference lines
		for (int i = 0; i < 10; i++) {
			Random r = new Random();
			int red = r.nextInt(256);
			int green = r.nextInt(256);
			int blue = r.nextInt(256);
			Color c = new Color(red, green, blue);
			g.setColor(c);
			int x1 = r.nextInt(131);
			int y1 = r.nextInt(51);
			int x2 = r.nextInt(131);
			int y2 = r.nextInt(51);
			g.drawLine(x1, y1, x2, y2);// Draw a line
			// g.drawOval(x1, y1, x2, y2);//Draw a curve
		}

		// 3. Add text
		g.setColor(Color.BLACK);
		g.setFont(new Font(" ", Font.BOLD, 40));

		// 4. Fill the text into the artboard
		g.drawString(code, 15, 40);

		// 5. Close the canvas
		g.dispose();
		return bi;
	}

}