//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//PIMS: Personal Invstment Management System
//Class : ChangePassword
//This class displays the interface fo changing the password and also registers
//the new password. To change the password the user needs to enter the
//previous password.
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import javax.swing.*;
import java.lang.*;
import java.io.*;
import java.util.*;

public class ChangePassword extends JFrame implements ActionListener{

	private SecurityManager SM;
	private String login;
	private String password;

	private int chances = 0;

	Label passl;
	TextField pass;
	Label new_passl;
	TextField new_pass;
	Label retype_passl;
	TextField retype_pass;
	Button ok;
	Button cancel;

	public ChangePassword(SecurityManager SM){

		this.SM = SM;

		login = "";
		password = "";

		changepass();
	}

	private void changepass(){
		setSize(400, 200);
		setLocation(120,150);
		setBackground(Color.white);
		setTitle("PIMS Change Password");

		Container CP = getContentPane();
		CP.setBackground(Color.white);
		CP.setLayout(new GridLayout(4,1));

		Panel pan1 = new Panel();
		Panel pan2 = new Panel();
		Panel pan3 = new Panel();
		Panel pan4 =new Panel();

		passl = new Label("Old Password");
		pass = new TextField(15);
		pass.setEchoChar('*');
		pan1.add(passl);pan1.add(pass);

		new_passl = new Label("New Password");
		new_pass = new TextField(15);
		new_pass.setEchoChar('*');
		pan2.add(new_passl);pan2.add(new_pass);

		retype_passl = new Label("Retype New Password");
		retype_pass = new TextField(15);
		retype_pass.setEchoChar('*');
		pan3.add(retype_passl);pan3.add(retype_pass);

		ok = new Button("Ok");
		ok.addActionListener(this);
		cancel = new Button("Cancel");
		cancel.addActionListener(this);
		pan4.add(ok);pan4.add(cancel);

		CP.add(pan1);
		CP.add(pan2);
		CP.add(pan3);
		CP.add(pan4);

		setVisible(true);
	}

	public void actionPerformed(ActionEvent ae){

	   try{
		String action = ae.getActionCommand();

		String passt = pass.getText();
		String new_passt = new_pass.getText();
		String retype_passt = retype_pass.getText();

		if(action.equals("Ok")){
			if(passt.equals("") || new_passt.equals("") || retype_passt.equals("")){
				Error e = new Error("Login or Password not Entered.");
			return;
			}
			if(SM.ValidateUser(passt)){
				if(!new_passt.equals(retype_passt)){
					new Error("typed passwords do not match");
					setVisible(false);
				}
				else{
					SM.ChangePassword(new_passt);
					new Message("Your PIMS Password has been Changed");
					setVisible(false);
				}
			}
			else{
				new Error("PIMS Authentication Failed");
			}
		}
		if(action.equals("Cancel"))setVisible(false);
	   }catch(Exception e){
	   	new Error("Problem in changing password");
		return;
	   }
	}
}