/*
 * Copyright 2011-17 Fraunhofer ISE, energy & meteo Systems GmbH and other contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.openmuc.openiec61850.clientgui;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class SettingsFrame extends JDialog implements ActionListener {

    private static final long serialVersionUID = -411845634137160667L;

    private int tselLocal1 = 0;
    private int tselLocal2 = 0;

    private int tselRemote1 = 0;
    private int tselRemote2 = 1;

    private final JTextField tselLocalField1 = new JTextField(Integer.toString(tselLocal1));
    private final JTextField tselLocalField2 = new JTextField(Integer.toString(tselLocal2));

    private final JTextField tselRemoteField1 = new JTextField(Integer.toString(tselRemote1));
    private final JTextField tselRemoteField2 = new JTextField(Integer.toString(tselRemote2));

    public SettingsFrame() {
        setModalityType(ModalityType.APPLICATION_MODAL);

        final GridBagLayout layout = new GridBagLayout();
        setLayout(layout);

        this.setSize(200, 120);
        setLocationRelativeTo(null);

        JLabel label = new JLabel("TSelLocal: ");
        GridBagConstraints constraint = new GridBagConstraints();
        constraint.gridwidth = 1;
        constraint.gridheight = 1;
        constraint.gridx = 0;
        constraint.gridy = 0;
        constraint.insets = new Insets(5, 5, 5, 5);
        constraint.anchor = GridBagConstraints.WEST;
        layout.setConstraints(label, constraint);
        add(label);

        constraint = new GridBagConstraints();
        constraint.fill = GridBagConstraints.HORIZONTAL;
        constraint.gridwidth = 1;
        constraint.gridheight = 1;
        constraint.gridx = 1;
        constraint.gridy = 0;
        constraint.weightx = 1;
        constraint.insets = new Insets(5, 5, 5, 5);
        constraint.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tselLocalField1, constraint);
        add(tselLocalField1);

        constraint = new GridBagConstraints();
        constraint.fill = GridBagConstraints.HORIZONTAL;
        constraint.gridwidth = 1;
        constraint.gridheight = 1;
        constraint.gridx = 2;
        constraint.gridy = 0;
        constraint.weightx = 1;
        constraint.insets = new Insets(5, 5, 5, 5);
        constraint.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tselLocalField2, constraint);
        add(tselLocalField2);

        label = new JLabel("TSelRemote: ");
        constraint = new GridBagConstraints();
        constraint.gridwidth = 1;
        constraint.gridheight = 1;
        constraint.gridx = 0;
        constraint.gridy = 1;
        constraint.insets = new Insets(5, 5, 5, 5);
        constraint.anchor = GridBagConstraints.WEST;
        layout.setConstraints(label, constraint);
        add(label);

        constraint = new GridBagConstraints();
        constraint.fill = GridBagConstraints.HORIZONTAL;
        constraint.gridwidth = 1;
        constraint.gridheight = 1;
        constraint.gridx = 1;
        constraint.gridy = 1;
        constraint.weightx = 1;
        constraint.insets = new Insets(5, 5, 5, 5);
        constraint.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tselRemoteField1, constraint);
        add(tselRemoteField1);

        constraint = new GridBagConstraints();
        constraint.fill = GridBagConstraints.HORIZONTAL;
        constraint.gridwidth = 1;
        constraint.gridheight = 1;
        constraint.gridx = 2;
        constraint.gridy = 1;
        constraint.weightx = 1;
        constraint.insets = new Insets(5, 5, 5, 5);
        constraint.anchor = GridBagConstraints.WEST;
        layout.setConstraints(tselRemoteField2, constraint);
        add(tselRemoteField2);

        JButton button = new JButton("Cancel");
        button.setActionCommand("Cancel");
        button.addActionListener(this);
        constraint.gridwidth = 1;
        constraint.gridheight = 1;
        constraint.gridx = 0;
        constraint.gridy = 2;
        constraint.insets = new Insets(5, 5, 5, 5);
        constraint.anchor = GridBagConstraints.SOUTHWEST;
        layout.setConstraints(button, constraint);
        add(button);

        button = new JButton("OK");
        button.setActionCommand("Okay");
        button.addActionListener(this);
        constraint.gridwidth = 2;
        constraint.gridheight = 1;
        constraint.gridx = 1;
        constraint.gridy = 2;
        constraint.insets = new Insets(5, 5, 5, 5);
        constraint.anchor = GridBagConstraints.SOUTHWEST;
        layout.setConstraints(button, constraint);
        add(button);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if ("cancel".equalsIgnoreCase(e.getActionCommand())) {
            tselLocalField1.setText(Integer.toString(tselLocal1 & 0xFF));
            tselLocalField2.setText(Integer.toString(tselLocal2 & 0xFF));
            tselRemoteField1.setText(Integer.toString(tselRemote1 & 0xFF));
            tselRemoteField2.setText(Integer.toString(tselRemote2 & 0xFF));
            setVisible(false);
        }
        else if ("okay".equalsIgnoreCase(e.getActionCommand())) {
            tselLocal1 = parseTextField(tselLocalField1, tselLocal1);
            tselLocal2 = parseTextField(tselLocalField2, tselLocal2);
            tselRemote1 = parseTextField(tselRemoteField1, tselRemote1);
            tselRemote2 = parseTextField(tselRemoteField2, tselRemote2);
            setVisible(false);
        }
    }

    public byte[] getTselLocal() {
        return new byte[] { (byte) tselLocal1, (byte) tselLocal2 };
    }

    public byte[] getTselRemote() {
        return new byte[] { (byte) tselRemote1, (byte) tselRemote2 };
    }

    public void setTselLocal(byte[] tsel) {
        if (tsel.length != 2) {
            throw new IllegalArgumentException("TSel must consist of 2 bytes");
        }
        tselLocal1 = tsel[0];
        tselLocal2 = tsel[1];

        tselLocalField1.setText(Integer.toString(tselLocal1 & 0xFF));
        tselLocalField2.setText(Integer.toString(tselLocal2 & 0xFF));
    }

    public void setTselRemote(byte[] tsel) {
        if (tsel.length != 2) {
            throw new IllegalArgumentException("TSel must consist of 2 bytes");
        }
        tselRemote1 = tsel[0];
        tselRemote2 = tsel[1];

        tselRemoteField1.setText(Integer.toString(tselRemote1 & 0xFF));
        tselRemoteField2.setText(Integer.toString(tselRemote2 & 0xFF));
    }

    private int parseTextField(JTextField field, int oldValue) {
        int value = oldValue;
        try {
            int newValue = Integer.parseInt(field.getText());
            if (newValue >= 0 && newValue <= 255) {
                value = newValue;
            }
        } catch (NumberFormatException e) {
            return oldValue;
        }
        return value;
    }
}