package com.ts3client.ui;

import com.formdev.flatlaf.util.ScaledEmptyBorder;
import com.formdev.flatlaf.util.UIScale;
import com.ts3client.net.ChannelSettings;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JSpinner;
import javax.swing.JTextField;
import javax.swing.SpinnerNumberModel;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

/**
 * The channel editor's "Advanced" tab: the phonetic name, the delete delay of a temporary
 * channel, voice encryption, and the two client limits.
 */
final class ChannelAdvancedPanel extends JPanel implements ChannelDialog.Tab {

    /** TeamSpeak's ceiling for {@code channel_delete_delay}, in seconds. */
    private static final int MAX_DELETE_DELAY = 604800;

    private final JTextField phoneticName = new JTextField();
    private final JSpinner deleteDelay =
            Spinners.compact(new JSpinner(new SpinnerNumberModel(0, 0, MAX_DELETE_DELAY, 1)));
    private final JButton deleteDelayMax = new JButton("max");
    private final JCheckBox encrypted = new JCheckBox("Voice Data encrypted");

    private final JRadioButton maxUsersUnlimited = new JRadioButton("Unlimited");
    private final JRadioButton maxUsersLimited = new JRadioButton("Limited");
    private final JSpinner maxUsers = Spinners.compact(new JSpinner(new SpinnerNumberModel(16, 0, 65535, 1)));

    private final JRadioButton familyInherited = new JRadioButton("Inherited");
    private final JRadioButton familyUnlimited = new JRadioButton("Unlimited");
    private final JRadioButton familyLimited = new JRadioButton("Limited");
    private final JSpinner familyMaxUsers =
            Spinners.compact(new JSpinner(new SpinnerNumberModel(16, 0, 65535, 1)));

    ChannelAdvancedPanel() {
        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
        setBorder(new ScaledEmptyBorder(8, 8, 8, 8));

        phoneticName.setToolTipText("Set phonetic nickname used for this channel by text-to-speech.");
        deleteDelay.setToolTipText("<html><p>Delay in seconds after temporary channels are deleted"
                + " after the last user left the channel.</p></html>");
        deleteDelayMax.setToolTipText("Set delete delay to maximum value");
        deleteDelayMax.addActionListener(a -> deleteDelay.setValue(MAX_DELETE_DELAY));
        encrypted.setToolTipText("Voice data in this channel will be encrypted.");

        ButtonGroup users = new ButtonGroup();
        users.add(maxUsersUnlimited);
        users.add(maxUsersLimited);
        maxUsersUnlimited.setToolTipText("Unlimited number of clients can join this channel.");
        maxUsersLimited.setToolTipText("Limit number of clients in this channel.");
        maxUsersUnlimited.addActionListener(a -> syncLimits());
        maxUsersLimited.addActionListener(a -> syncLimits());

        ButtonGroup family = new ButtonGroup();
        family.add(familyInherited);
        family.add(familyUnlimited);
        family.add(familyLimited);
        familyInherited.setToolTipText("Inherit the client limit by parent channel.");
        familyUnlimited.setToolTipText("The channel subtree can be joined by unlimited number of clients.");
        familyLimited.setToolTipText("Limit the number of clients in the channel subtree.");
        for (JRadioButton radio : new JRadioButton[]{familyInherited, familyUnlimited, familyLimited}) {
            radio.addActionListener(a -> syncLimits());
        }

        JPanel other = otherSettings();
        other.setAlignmentX(0f);
        fixHeight(other);
        add(other);
        add(Box.createVerticalStrut(UIScale.scale(6)));

        JPanel limits = new JPanel();
        limits.setLayout(new BoxLayout(limits, BoxLayout.X_AXIS));
        limits.add(limitBox("Max Users", new JRadioButton[]{maxUsersUnlimited, maxUsersLimited}, maxUsers));
        limits.add(Box.createHorizontalStrut(UIScale.scale(8)));
        limits.add(limitBox("Family Max Users",
                new JRadioButton[]{familyInherited, familyUnlimited, familyLimited}, familyMaxUsers));
        limits.setAlignmentX(0f);
        fixHeight(limits);
        add(limits);
        add(Box.createVerticalGlue());
    }

    /** The delete delay only means anything for a channel that disappears on its own. */
    void setChannelType(ChannelSettings.Type type) {
        boolean temporary = type == ChannelSettings.Type.TEMPORARY;
        deleteDelay.setEnabled(temporary);
        deleteDelayMax.setEnabled(temporary);
    }

    @Override
    public void read(ChannelSettings settings) {
        phoneticName.setText(settings.phoneticName);
        deleteDelay.setValue(Math.min(MAX_DELETE_DELAY, Math.max(0, settings.deleteDelay)));
        encrypted.setSelected(settings.encrypted);

        if (settings.maxClientsUnlimited) maxUsersUnlimited.setSelected(true);
        else maxUsersLimited.setSelected(true);
        maxUsers.setValue(settings.maxClients);

        if (settings.familyInherited) familyInherited.setSelected(true);
        else if (settings.familyUnlimited) familyUnlimited.setSelected(true);
        else familyLimited.setSelected(true);
        familyMaxUsers.setValue(settings.maxFamilyClients);

        setChannelType(settings.type);
        syncLimits();
    }

    @Override
    public void write(ChannelSettings settings) {
        settings.phoneticName = phoneticName.getText();
        settings.deleteDelay = (Integer) deleteDelay.getValue();
        settings.encrypted = encrypted.isSelected();
        settings.maxClientsUnlimited = maxUsersUnlimited.isSelected();
        settings.maxClients = (Integer) maxUsers.getValue();
        settings.familyInherited = familyInherited.isSelected();
        settings.familyUnlimited = familyUnlimited.isSelected();
        settings.maxFamilyClients = (Integer) familyMaxUsers.getValue();
    }

    private void syncLimits() {
        maxUsers.setEnabled(maxUsersLimited.isSelected());
        familyMaxUsers.setEnabled(familyLimited.isSelected());
    }

    private JPanel otherSettings() {
        JPanel panel = new JPanel(new GridBagLayout());
        panel.setBorder(BorderFactory.createTitledBorder("Other Settings"));
        GridBagConstraints c = new GridBagConstraints();
        c.insets = UIScale.scale(new Insets(3, 4, 3, 4));
        c.anchor = GridBagConstraints.WEST;
        c.fill = GridBagConstraints.HORIZONTAL;

        c.gridx = 0;
        c.gridy = 0;
        panel.add(new JLabel("Phonetic Name:"), c);
        c.gridx = 1;
        c.weightx = 1;
        panel.add(phoneticName, c);

        c.gridx = 0;
        c.gridy = 1;
        c.weightx = 0;
        panel.add(new JLabel("Delete delay:"), c);
        JPanel delay = new JPanel(new FlowLayout(FlowLayout.LEFT, UIScale.scale(4), 0));
        delay.add(deleteDelay);
        delay.add(deleteDelayMax);
        c.gridx = 1;
        c.weightx = 1;
        panel.add(delay, c);

        c.gridx = 1;
        c.gridy = 2;
        panel.add(encrypted, c);
        return panel;
    }

    /**
     * A limit box: its choices stacked, with the count beside the last of them —
     * "Limited", the only choice it belongs to.
     */
    private JPanel limitBox(String title, JRadioButton[] choices, JSpinner spinner) {
        JPanel box = new JPanel();
        box.setLayout(new BoxLayout(box, BoxLayout.Y_AXIS));
        box.setBorder(BorderFactory.createTitledBorder(title));
        for (int i = 0; i < choices.length; i++) {
            JRadioButton radio = choices[i];
            radio.setAlignmentX(0f);
            if (i < choices.length - 1) {
                box.add(radio);
                continue;
            }
            JPanel row = new JPanel(new FlowLayout(FlowLayout.LEFT, UIScale.scale(6), 0));
            row.setAlignmentX(0f);
            row.add(radio);
            row.add(spinner);
            box.add(row);
        }
        box.add(Box.createVerticalGlue());
        return box;
    }

    /** Keeps a section at its natural height, so the free space collects at the bottom. */
    private static void fixHeight(JPanel panel) {
        panel.setMaximumSize(new Dimension(Integer.MAX_VALUE, panel.getPreferredSize().height));
    }
}