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package algorithmus;

import java.awt.Checkbox;
import java.awt.CheckboxGroup;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.io.UnsupportedEncodingException;

import javax.swing.JButton;
import javax.swing.JFrame;

public class Case extends Algorithmus {
	
	private String name = "Case";
	private boolean low = true;
	
	public String getName() {
		return name;
	}
	
	public void options() {
		JFrame frame = new JFrame();
		frame.setLayout(null);
		frame.setTitle("Case");
		frame.setSize(100, 100);
		frame.setResizable(false);
		Checkbox cb = new Checkbox("To Lowercase");
		cb.setBounds(5, 5, 100, 20);
		JButton apply = new JButton("Apply");
		apply.setBounds(5, 30, 75, 20);
		apply.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				low = cb.getState();
			}
		});
		frame.add(cb);
		frame.add(apply);
		frame.setVisible(true);
	}

	public String encode(String input) {
		try {
			if(low)
				return new String(lower(input.getBytes("US-ASCII")), "US-ASCII");
			else
				return new String(upper(input.getBytes("US-ASCII")), "US-ASCII");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
			return "Error";
		}
	}

	public String decode(String input) {
		try {
			if(low)
				return new String(upper(input.getBytes("US-ASCII")), "US-ASCII");
			else
				return new String(lower(input.getBytes("US-ASCII")), "US-ASCII");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
			return "Error";
		}
	}
	
	private byte[] upper(byte[] ba) {
		for(int i = 0; i<ba.length; i++)
			if(ba[i] > 96 && ba[i] < 123)
				ba[i] -= 32;
		return ba;
	}
	
	private byte[] lower(byte[] ba) {
		for(int i = 0; i<ba.length; i++)
			if(ba[i] > 64 && ba[i] < 91)
				ba[i] += 32;
		return ba;
	}

}