/*
 * LoginPrompt.java
 * 
 * Copyright (c) 2003-2004 Digi International
 * This program and the information contained in it is confidential and
 * proprietary to Digi International and may not be used, copied, or re-
 * produced without the prior written permission of Digi International.
 * 
 */

package com.digi.config.ui;

import com.digi.config.util.*;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;

/**
 * Shows a login prompt dialog.
 */
public class LoginPrompt {
    Component parent; // parent component of dialog
    String user;
    String password;
    String realm;
    String host;

    // UI controls
    JTextField userEdit;
    JTextField pwdEdit;

    /**
     * Constructor
     * @param parent parent component of dialog (if null then a default frame is used).
     */
    public LoginPrompt(Component parent) {
        this.parent = parent;
        this.user = "";
        this.password = "";
        this.realm = "";
        this.host = "";
    }

    /**
     * Show the login prompt dialog.
     * @return JOptionPane.OK_OPTION if user specified a user and password and clicked OK.
     * JOptionPane.CANCEL_OPTION or JOptionPane.CLOSE_OPTION if user clicked cancel or close.
     */
    public int showLoginPrompt() {
        JOptionPane promptPane = new JOptionPane();

        // Create the panel that will hold the server controls
        GridContentPanel content = new GridContentPanel(1);
        content.setOpaque(false);

        WindowAdapter winListener = new WindowAdapter() {
            public void windowOpened(WindowEvent e) {
                // Determine initial focus (user if no default user, otherwise password).
                if (user.length() == 0) {
                    userEdit.requestFocus();
                } else {
                    pwdEdit.requestFocus();
                }
    
                // Since this listener is no longer needed, remove it
                e.getWindow().removeWindowListener(this);
            }
        };

        content.addTextLine("LoginHeading");

        if (host.length() > 0) {
            JLabel hostLbl = content.addJLabel("LoginHostLbl", null);
            hostLbl.setText(host);
        }

        if (realm.length() > 0) {
            JLabel realmLbl = content.addJLabel("LoginRealmLbl", null);
            realmLbl.setText(realm);
        }

        userEdit = content.addJTextField("LoginUserLbl", null, 150, null);
        userEdit.setText(user);
        pwdEdit = content.addJPasswordField("LoginPasswordLbl", null, 150, null);
        if (user.length() == 0) {
            userEdit.requestFocus();
        } else {
            pwdEdit.requestFocus();
        }

//        String userLbl = ConfigResource.getUiRbString("LoginUserLbl");
//        JTextField userEdit = new JTextField(user);
//        String pwdLbl = ConfigResource.getUiRbString("LoginPasswordLbl");
//        JTextField pwdEdit = new JPasswordField();
//        promptPane.setMessage(new Object[] {userLbl, userEdit, pwdLbl, pwdEdit});
        promptPane.setMessage(content);
        promptPane.setMessageType(JOptionPane.PLAIN_MESSAGE);
        promptPane.setOptionType(JOptionPane.OK_CANCEL_OPTION);
        JDialog dlg = promptPane.createDialog(parent, ConfigResource.getUiRbString("LoginTitle"));
        dlg.addWindowListener(winListener); // Listen for open window to set proper initial focus
        dlg.show();

        int response = JOptionPane.CLOSED_OPTION;
        Object value = promptPane.getValue();
        if (value != null && (value instanceof Integer)) {
            response = ((Integer)value).intValue();
        }

        if (response == JOptionPane.OK_OPTION) {
            user = userEdit.getText();
            password = pwdEdit.getText();
        }
        return response;
    }

    /**
     * Set the initial user name shown when the prompt is displayed.
     * @param user The user name.
     */
    public void setUserName(String user) {
        if (user != null) {
            this.user = user;
        } else {
            this.user = "";
        }
    }

    /**
     * Set the realm requesting authentication.
     * @param realm The security realm name.
     */
    public void setRealm(String realm) {
        if (realm != null) {
            this.realm = realm;
        } else {
            this.realm = "";
        }
    }

    /**
     * Set the host system requesting authentication.
     * @param host The host system.
     */
    public void setHost(String host) {
        if (host != null) {
            this.host = host;
        } else {
            this.host = "";
        }
    }

    /**
     * Get the user name entered in the login prompt (if showLoginPrompt returned OK_OPTION).
     * @return user name
     */
    public String getUserName() {
        return user;
    }

    /**
     * Get the password entered in the login prompt (if showLoginPrompt returned OK_OPTION).
     */
    public String getPassword() {
        return password;
    }


    /**
     * Default constructor - private
     */
    private LoginPrompt() {
    }
}