package com.ts3client.ui;

import com.formdev.flatlaf.util.UIScale;
import com.ts3client.audio.AudioBackend;
import com.ts3client.audio.desktop.DesktopAudioBackend;
import com.ts3client.config.AwayMessages;
import com.ts3client.config.BanReasonPresets;
import com.ts3client.config.Bookmark;
import com.ts3client.config.Bookmarks;
import com.ts3client.config.IdentityStore;
import com.ts3client.config.Settings;
import com.ts3client.myts.MyTeamSpeakLogin;
import com.ts3client.teamspeak.TeamSpeakImporter;
import com.ts3client.contacts.ContactStore;
import com.ts3client.net.ChannelNode;
import com.ts3client.session.SelfState;
import com.ts3client.session.ServerSession;
import com.ts3client.session.Sessions;
import com.ts3client.sound.SoundNotifier;
import com.ts3client.sound.SoundPlayer;

import javax.swing.AbstractAction;
import javax.swing.JCheckBox;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;

/**
 * The main application window: toolbar, tab bar, status bar and menus, hosting
 * one {@link ServerTab} per open server connection.
 *
 * <p>Several servers can be connected at once — their incoming voice is mixed
 * into the same output — but only one of them owns the microphone at a time
 * ("active" tab, marked in the tab strip and switched from the toolbar).
 */
public final class MainFrame extends JFrame implements ServerTabPane.Listener {

    private final Settings settings;
    private final Bookmarks bookmarks = Bookmarks.load();
    private final AwayMessages awayMessages = AwayMessages.load();
    private final IdentityStore identities;
    private final MyTeamSpeakLogin myTeamSpeak = MyTeamSpeakLogin.load();
    /** Friends and blocked clients, shared by every connection. */
    private final ContactStore contacts = ContactStore.load();
    private final AudioBackend audio = new DesktopAudioBackend();
    /** Sound pack playback, shared by every connection. */
    private final SoundNotifier sounds;
    private final SoundPlayer soundPlayer;

    private final List<ServerTab> tabs = new ArrayList<>();
    /** The tabs' sessions: who holds the microphone, and the state shared by every server. */
    private final Sessions sessions = new Sessions(() -> {
        refreshTabs();
        updateTray();
    });
    private final ServerTabPane tabPane = new ServerTabPane(this);

    /** The tab whose views are on screen. */
    private ServerTab selected;
    private BanReasonPresets banReasonPresets;

    private MainMenuBar menuBar;
    private javax.swing.Timer statusTimer;

    /** Mirrors the active server's own client state next to the clock; set once the window is up. */
    private volatile TrayController tray;

    private MainToolbar toolbar;
    private StatusBar statusBar;

    /** Global hotkeys: the bindings, the matching engine and the platform input hook. */
    private final HotkeyService hotkeys;

    /** Guards {@link #shutdown()} so the window listener and JVM hook don't both run it. */
    private final AtomicBoolean shuttingDown = new AtomicBoolean(false);
    private final Thread shutdownHook = new Thread(this::shutdown, "ts3j-shutdown");

    public MainFrame(Settings settings) {
        super("TS3J — TeamSpeak 3 Java Client");
        this.settings = settings;
        this.identities = IdentityStore.load(settings);
        new TeamSpeakImporter(identities, bookmarks, settings).seedIfFresh();
        this.sounds = new SoundNotifier(settings);
        this.soundPlayer = audio.createSoundPlayer(settings);
        this.sounds.setPlayer(soundPlayer);
        this.hotkeys = new HotkeyService(new HotkeyActions(this), this::hotkeyArgumentChoices);
        hotkeys.addKeyPressListener(() -> SwingUtilities.invokeLater(sessions::keyPressed));
        contacts.addListener(() -> SwingUtilities.invokeLater(this::contactsChanged));

        setIconImages(Icons.appImages());
        // We tear the connections down ourselves on close, so don't let Swing kill the JVM.
        setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                quit();
            }

            @Override
            public void windowOpened(WindowEvent e) {
                // Docking waits for the panel to adopt the icon, so it must not hold up the window.
                SwingUtilities.invokeLater(MainFrame.this::installTray);
            }
        });
        // Catches Ctrl+C / SIGTERM so we still leave the servers cleanly.
        Runtime.getRuntime().addShutdownHook(shutdownHook);
        setMinimumSize(UIScale.scale(new Dimension(720, 480)));

        menuBar = buildMenuBar();
        setJMenuBar(menuBar);

        toolbar = buildToolbar();
        add(toolbar, BorderLayout.NORTH);
        // Switching the icon pack in the options dialog re-decorates the whole window.
        IconTheme.get().addListener(() -> SwingUtilities.invokeLater(this::rebuildIcons));
        add(tabPane, BorderLayout.CENTER);
        // The tree and the chat each claim Ctrl+F for themselves while they have the focus;
        // from anywhere else it searches the chat.
        getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW)
                .put(KeyStroke.getKeyStroke("control F"), "ts3-find");
        getRootPane().getActionMap().put("ts3-find", new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (selected != null) selected.chat().openFind();
            }
        });
        statusBar = new StatusBar();
        statusBar.setVisible(settings.showStatusBar);
        add(statusBar, BorderLayout.SOUTH);

        statusBar.setCodec(audio.description());

        ServerTab first = newTab();
        selectTab(first);
        first.chat().appendSystem("Welcome to the TS3J Swing client.");
        first.chat().appendSystem("Use Connections → Connect to join a server.");

        statusTimer = new javax.swing.Timer(3000, e -> updateConnectionStatus());
        statusTimer.start();
        setSize(UIScale.scale(new Dimension(880, 560)));
        setLocationRelativeTo(null);

        // Deferred so the window is on screen before we start connecting.
        List<Bookmark> startup = bookmarks.startupBookmarks();
        if (!startup.isEmpty()) {
            SwingUtilities.invokeLater(() -> {
                for (Bookmark b : startup) connectToBookmark(b);
            });
        }
    }

    // ---- UI construction ----

    private MainMenuBar buildMenuBar() {
        return new MainMenuBar(bookmarks, new MainMenuBar.Listener() {
            @Override
            public void onConnect() {
                showConnectDialog();
            }

            @Override
            public void onDisconnect() {
                doDisconnect();
            }

            @Override
            public void onCloseTab() {
                closeTab(selected);
            }

            @Override
            public void onQuit() {
                quit();
            }

            @Override
            public void onToggleMic() {
                toolbar.clickMic();
            }

            @Override
            public void onToggleSpeaker() {
                toolbar.clickSpeaker();
            }

            @Override
            public void onAwayToggle(boolean away) {
                toggleAway(away);
            }

            @Override
            public void onAwayStatus() {
                setAwayStatus();
            }

            @Override
            public void onCommanderToggle(boolean commander) {
                if (selected != null) selected.session().setCommander(commander);
            }

            @Override
            public void onChangeNickname() {
                changeNickname();
            }

            @Override
            public void onSetAvatar() {
                if (selected != null && selected.session().isConnected()) selected.showAvatarDialog();
            }

            @Override
            public void onShowIdentities() {
                showIdentities();
            }

            @Override
            public void onShowContacts() {
                showContacts(null);
            }

            @Override
            public boolean canViewBanList() {
                return selected != null && selected.session().canViewBanList();
            }

            @Override
            public void onShowBanList() {
                if (selected != null) selected.showBanList(banReasonPresets());
            }

            @Override
            public void onShowSettings() {
                showSettings();
            }

            @Override
            public void onShowAbout() {
                showAbout();
            }

            @Override
            public void onConnectBookmark(Bookmark bookmark, boolean newTab) {
                if (newTab) selectTab(newTab());
                connectToBookmark(bookmark);
            }

            @Override
            public void onAddCurrentServerBookmark() {
                addCurrentServerBookmark();
            }

            @Override
            public void onManageBookmarks() {
                new BookmarksDialog(MainFrame.this, bookmarks, identities, settings,
                        MainFrame.this::connectToBookmark, menuBar::rebuildBookmarks).setVisible(true);
            }
        });
    }

    private MainToolbar buildToolbar() {
        return new MainToolbar(settings, new MainToolbar.Listener() {
            @Override
            public void onConnect() {
                showConnectDialog();
            }

            @Override
            public void onDisconnect() {
                doDisconnect();
            }

            @Override
            public void onActivate() {
                moveMicrophoneToSelectedTab();
            }

            @Override
            public void onMicMuteToggle(boolean muted) {
                if (selected == null) return;
                selected.session().setMicMuted(muted);
                updateToolbar();
            }

            @Override
            public void onDeafenToggle(boolean deafened) {
                if (selected == null) return;
                selected.session().setDeafened(deafened);
                updateToolbar();
            }

            @Override
            public void onAwayToggle(boolean away) {
                toggleAway(away);
            }

            @Override
            public JPopupMenu buildAwayMenu() {
                return MainFrame.this.buildAwayMenu();
            }

            @Override
            public void onSettings() {
                showSettings();
            }

            @Override
            public void onMasterVolumeChanged() {
                applyOutputSettingsToAllTabs();
            }

            @Override
            public void onStatusBarVisibilityChanged(boolean visible) {
                statusBar.setVisible(visible);
                revalidate();
                repaint();
            }
        });
    }

    /** Rebuilds the icon-bearing chrome after the active icon pack changed. */
    private void rebuildIcons() {
        setIconImages(Icons.appImages());
        menuBar = buildMenuBar();
        setJMenuBar(menuBar);
        remove(toolbar);
        toolbar = buildToolbar();
        add(toolbar, BorderLayout.NORTH);
        updateToolbar();
        refreshTabs();
        if (tray != null) tray.refreshIcon();
        revalidate();
        repaint();
    }

    // ---- tab management ----

    private ServerTab newTab() {
        ServerTab tab = new ServerTab(this, settings, identities, audio, sounds, contacts);
        tabs.add(tab);
        sessions.add(tab.session());
        tabPane.addTab(tab);
        refreshTabs();
        return tab;
    }

    /** The tab a new connection should use: the current one if it is free, else a new one. */
    private ServerTab tabForNewConnection() {
        if (selected != null && !selected.session().isBusy()) return selected;
        ServerTab tab = newTab();
        selectTab(tab);
        return tab;
    }

    @Override
    public void selectTab(ServerTab tab) {
        if (tab == null || !tabs.contains(tab)) return;
        selected = tab;
        tabPane.setSelected(tab);
        refreshTabs();
        updateToolbar();
        updateStatusLabel();
    }

    @Override
    public void closeTab(ServerTab tab) {
        if (tab == null) return;
        tab.session().disconnect();
        if (tabs.size() == 1) return; // always keep one view around

        tabs.remove(tab);
        tab.session().dispose();
        tabPane.removeTab(tab);
        if (selected == tab) {
            selected = null;
            selectTab(tabs.get(0));
        } else {
            selectTab(selected); // the pane rebuilt itself; restore the selection
        }
        sessions.remove(tab.session());
    }

    /** The tab that holds the capture device; null when nobody is capturing. */
    private ServerTab micTab() {
        ServerSession owner = sessions.microphoneOwner();
        for (ServerTab tab : tabs) {
            if (tab.session() == owner) return tab;
        }
        return null;
    }

    /** Repaints the tab labels (title, microphone marker). */
    private void refreshTabs() {
        tabPane.refresh(micTab());
    }

    // ---- callbacks from ServerTab ----

    /** A tab's title, status or connection state changed. */
    void tabUpdated(ServerTab tab) {
        if (!tabs.contains(tab)) return;
        refreshTabs();
        if (tab == selected) {
            updateToolbar();
            updateStatusLabel();
        }
        updateTray();
    }

    /** The local client on {@code tab} started or stopped talking, muted itself, … */
    void selfStateChanged(ServerTab tab) {
        if (tabs.contains(tab)) updateTray();
    }

    void tabConnected(ServerTab tab) {
        if (!tabs.contains(tab)) return;
        sessions.connected(tab.session());
        tabUpdated(tab);
    }

    void tabDisconnected(ServerTab tab) {
        if (!tabs.contains(tab)) return;
        sessions.disconnected(tab.session());
        tabUpdated(tab);
    }

    // ---- hotkeys ----

    /**
     * Which connections a fired hotkey reaches: with "on active server" ticked only the
     * selected tab, otherwise every connected one.
     */
    List<ServerTab> hotkeyTargets(boolean activeServerOnly) {
        List<ServerTab> out = new ArrayList<>();
        if (activeServerOnly) {
            if (selected != null && selected.session().isConnected()) out.add(selected);
            return out;
        }
        for (ServerTab tab : tabs) {
            if (tab.session().isConnected()) out.add(tab);
        }
        return out;
    }

    ServerTab selectedTab() {
        return selected;
    }

    List<ServerTab> allTabs() {
        return new ArrayList<>(tabs);
    }

    /** Opens the microphone while a push-to-talk hotkey is held. */
    void setPushToTalk(boolean talking) {
        sessions.setPushToTalk(talking);
    }

    void moveMicrophoneToSelectedTab() {
        if (selected != null && selected.session().isConnected()) sessions.giveMicrophoneTo(selected.session());
        updateToolbar();
    }

    /** Connects to the bookmark with this label; no label means the first one. */
    void connectBookmark(String label, boolean newTab) {
        Bookmark match = null;
        for (Bookmark b : bookmarks.all()) {
            if (label == null || label.isBlank() || label.equalsIgnoreCase(b.label)) {
                match = b;
                break;
            }
        }
        if (match == null) return;
        if (newTab) selectTab(newTab());
        connectToBookmark(match);
    }

    /** Selects the tab with this 1-based number, as the "Select Server Tab" action names it. */
    void selectTabNumber(int number) {
        if (number >= 1 && number <= tabs.size()) selectTab(tabs.get(number - 1));
    }

    void stepTab(int delta) {
        if (tabs.isEmpty()) return;
        int index = Math.max(0, tabs.indexOf(selected));
        selectTab(tabs.get(Math.floorMod(index + delta, tabs.size())));
    }

    void setSoundsMuted(boolean muted) {
        sounds.setMuted(muted);
    }

    boolean areSoundsMuted() {
        return sounds.isMuted();
    }

    void adjustMasterVolume(double delta) {
        settings.outputVolume = Math.max(0, Math.min(2.0, settings.outputVolume + delta));
        settings.save();
        applyOutputSettingsToAllTabs();
        updateStatusLabel();
    }

    /** Applies a new nickname, or asks for one when the hotkey carries none. */
    void changeNickname(String nickname) {
        if (nickname == null || nickname.isBlank()) {
            changeNickname();
            return;
        }
        settings.nickname = nickname.trim();
        settings.save();
        sessions.setNickname(settings.nickname);
    }

    void browseCurrentChannel() {
        if (selected == null || !selected.session().isConnected()) return;
        ChannelNode channel = selected.session().currentChannel();
        if (channel != null) selected.browseFiles(channel);
    }

    void reloadSkin() {
        IconTheme.get().reload(settings);
    }

    void bringToFront() {
        setVisible(true);
        setExtendedState(getExtendedState() & ~JFrame.ICONIFIED);
        toFront();
        requestFocus();
    }

    void sendToBack() {
        setExtendedState(getExtendedState() | JFrame.ICONIFIED);
    }

    /**
     * The values a parameterised hotkey action can take, for the tree in the hotkey
     * dialog: the saved bookmarks, the installed sound packs and the channels of the
     * server on screen.
     */
    private List<String> hotkeyArgumentChoices(com.ts3client.hotkey.HotkeyAction action) {
        List<String> out = new ArrayList<>();
        switch (action.argument()) {
            case BOOKMARK -> {
                for (Bookmark b : bookmarks.all()) {
                    if (b.label != null && !b.label.isBlank()) out.add(b.label);
                }
            }
            case PROFILE -> {
                if (action == com.ts3client.hotkey.HotkeyAction.SOUNDPACK_ACTIVATE) {
                    for (com.ts3client.sound.SoundPack pack : sounds.availablePacks()) out.add(pack.name());
                }
            }
            case CHANNEL -> {
                if (selected != null && selected.session().isConnected()) {
                    out.addAll(selected.session().channelPaths());
                }
            }
            default -> {
            }
        }
        return out;
    }

    /** Repaints the chrome after a hotkey changed the local client's state. */
    void refreshAfterHotkey() {
        updateToolbar();
        updateTray();
        refreshTabs();
    }

    // ---- actions ----

    private void showConnectDialog() {
        ConnectDialog dlg = new ConnectDialog(this, settings, identities);
        dlg.setVisible(true);
        if (!dlg.isConfirmed()) return;
        startConnection(dlg.getAddress(), dlg.getPort(), dlg.getNickname(), dlg.getPassword(),
                dlg.getIdentityId(), "", "");
    }

    /**
     * Opens a connection in the current tab when it is free, otherwise in a new one.
     *
     * @param identityId      identity to use, or empty for the default one
     * @param channel         channel path to join on connect, or empty for the default channel
     * @param channelPassword password for that channel, if any
     */
    private void startConnection(String address, int port, String nickname, String password, String identityId,
                                 String channel, String channelPassword) {
        startConnection(address, port, nickname, password, identityId, channel, channelPassword, false);
    }

    /**
     * @param replaceCurrent connect on the current tab, leaving the server it is on, instead of
     *                       moving to a free tab
     */
    private void startConnection(String address, int port, String nickname, String password, String identityId,
                                 String channel, String channelPassword, boolean replaceCurrent) {
        settings.lastAddress = address + ":" + port;
        settings.nickname = nickname;
        settings.serverPassword = password;
        settings.save();

        ServerTab tab = (replaceCurrent && selected != null) ? selected : tabForNewConnection();
        // The first connection to come up takes the microphone; later ones are muted
        // until the user activates them.
        if (sessions.microphoneOwner() == null) sessions.giveMicrophoneTo(tab.session());
        tab.session().switchTo(address, port, nickname, password, identityId, channel, channelPassword);
    }

    /** Connects on the current tab, leaving whatever server it is on. */
    private void connectToBookmark(Bookmark b) {
        String nick = (b.nickname != null && !b.nickname.isBlank()) ? b.nickname : settings.nickname;
        startConnection(b.address, b.port, nick, b.password, b.identityId, b.channel, b.channelPassword, true);
    }

    private void addCurrentServerBookmark() {
        if (selected == null || !selected.session().isConnected()) {
            JOptionPane.showMessageDialog(this, "Connect to a server first.",
                    "Add bookmark", JOptionPane.INFORMATION_MESSAGE);
            return;
        }
        String addr = selected.session().address();
        int port = selected.session().port();
        String channelPath = selected.session().currentChannelPath();

        JTextField labelField = new JTextField(selected.session().title());
        JCheckBox joinChannel = new JCheckBox("Join \"" + channelPath + "\" on connect", !channelPath.isEmpty());
        JPanel form = new JPanel(new GridLayout(0, 1, 0, UIScale.scale(2)));
        form.add(new JLabel("Bookmark label:"));
        form.add(labelField);
        if (!channelPath.isEmpty()) form.add(joinChannel);
        if (JOptionPane.showConfirmDialog(this, form, "Add bookmark",
                JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE) != JOptionPane.OK_OPTION) {
            return;
        }
        Bookmark bookmark = new Bookmark(labelField.getText().trim(), addr, port,
                settings.nickname, settings.serverPassword);
        bookmark.identityId = selected.session().identityId();
        if (joinChannel.isSelected()) bookmark.channel = channelPath;
        bookmarks.add(bookmark);
        bookmarks.save();
        menuBar.rebuildBookmarks();
    }

    /** The away button's drop-down: the global actions, the presets and their editor. */
    private JPopupMenu buildAwayMenu() {
        JPopupMenu menu = new JPopupMenu();
        boolean anyConnected = sessions.anyConnected();

        JCheckBoxMenuItem globally = new JCheckBoxMenuItem("Set Globally Away", Icons.of("AWAY"),
                sessions.isAwayEverywhere());
        globally.setEnabled(anyConnected);
        globally.addActionListener(e -> setAwayEverywhere(globally.isSelected(), null));

        JMenuItem globalStatus = new JMenuItem("Set Globally Away Status…", Icons.of("EDIT"));
        globalStatus.setEnabled(anyConnected);
        globalStatus.addActionListener(e -> {
            String message = askAwayMessage(sessions.awayMessage(selected == null ? null : selected.session()));
            if (message != null) setAwayEverywhere(true, message);
        });

        menu.add(globally);
        menu.add(globalStatus);
        menu.addSeparator();

        for (String preset : awayMessages.all()) {
            JMenuItem item = new JMenuItem(preset);
            item.setEnabled(anyConnected);
            item.addActionListener(e -> setAwayEverywhere(true, preset));
            menu.add(item);
        }
        if (!awayMessages.all().isEmpty()) menu.addSeparator();

        JMenuItem manage = new JMenuItem("Manage away messages…", Icons.of("EDIT"));
        manage.addActionListener(e -> new AwayMessagesDialog(this, awayMessages, null).setVisible(true));
        menu.add(manage);
        return menu;
    }

    private void toggleAway(boolean away) {
        if (selected == null) return;
        selected.session().setAway(away, "");
        updateToolbar();
    }

    /** Sets the away message on the selected server only. */
    private void setAwayStatus() {
        if (selected == null) return;
        String message = askAwayMessage(selected.session().awayMessage());
        if (message == null) return;
        selected.session().setAway(true, message);
        updateToolbar();
    }

    private void setAwayEverywhere(boolean away, String message) {
        sessions.setAwayEverywhere(away, message);
        updateToolbar();
    }

    /** @return the entered message (possibly empty), or null when cancelled */
    private String askAwayMessage(String initial) {
        return (String) JOptionPane.showInputDialog(this, "Away message (optional):", "Away status",
                JOptionPane.PLAIN_MESSAGE, Icons.of("AWAY"), null, initial);
    }

    private void doDisconnect() {
        if (selected != null) selected.session().disconnect();
    }

    /**
     * Tear everything down before the process exits: disconnect from every server
     * synchronously (so the "Leaving" notification actually reaches them) and stop
     * background timers. Idempotent and safe to call from any thread — the window
     * close handler, the Quit menu and the JVM shutdown hook may all invoke it.
     */
    private void shutdown() {
        if (!shuttingDown.compareAndSet(false, true)) return;
        if (statusTimer != null) statusTimer.stop();
        settings.save(); // keeps the layout the user left behind (info panel height, …)
        try {
            Runtime.getRuntime().removeShutdownHook(shutdownHook);
        } catch (IllegalStateException ignored) {
            // Already shutting down (hook itself is running); nothing to remove.
        }
        sessions.shutdown();
        soundPlayer.shutdown();
        hotkeys.dispose();
        if (tray != null) tray.dispose();
    }

    /** Leaves every server and ends the process. */
    private void quit() {
        shutdown();
        System.exit(0);
    }

    /** Loaded the first time a ban dialog needs them, and shared by every tab from then on. */
    private BanReasonPresets banReasonPresets() {
        if (banReasonPresets == null) banReasonPresets = BanReasonPresets.load();
        return banReasonPresets;
    }

    private void showIdentities() {
        new IdentitiesDialog(this, identities, settings, bookmarks, null).setVisible(true);
    }

    Settings settings() {
        return settings;
    }

    /** The one contacts window, kept so a second request brings it forward instead of doubling it. */
    private ContactsDialog contactsDialog;

    /**
     * Opens the contact list, or brings it forward.
     *
     * @param uniqueId the contact to select, or {@code null} to keep the current selection
     */
    void showContacts(String uniqueId) {
        if (contactsDialog == null || !contactsDialog.isDisplayable()) {
            contactsDialog = new ContactsDialog(this, contacts, settings);
        }
        if (uniqueId != null) contactsDialog.select(uniqueId);
        contactsDialog.setVisible(true);
        contactsDialog.toFront();
    }

    /** The contact list changed somewhere: every open server follows. */
    private void contactsChanged() {
        for (ServerTab tab : tabs) tab.contactsChanged();
    }

    private void showSettings() {
        // Device and voice-gating changes apply to the capturing connection and the
        // playback of the visible one; the rest pick the new settings up on connect.
        SettingsDialog dlg = new SettingsDialog(this, settings, audio,
                sessions.microphoneOwner() == null ? null : sessions.microphoneOwner().connection().getMicrophone(),
                selected == null ? null : selected.connection().getPlayback(),
                sounds, hotkeys,
                new MyTeamSpeakPanel(myTeamSpeak, new TeamSpeakImporter(identities, bookmarks, settings),
                        menuBar::rebuildBookmarks),
                () -> {
                    applyOutputSettingsToAllTabs();
                    contactsChanged();
                });
        dlg.setVisible(true);
    }

    /** Master volume / output device are global, so push them to every open connection. */
    private void applyOutputSettingsToAllTabs() {
        soundPlayer.setOutputDevice(settings.outputDevice);
        for (ServerTab tab : tabs) {
            if (tab.connection().getPlayback() == null) continue;
            tab.connection().getPlayback().setMasterVolume(settings.effectiveOutputVolume());
            tab.connection().getPlayback().setOutputDevice(settings.outputDevice);
        }
    }

    private void changeNickname() {
        String n = JOptionPane.showInputDialog(this, "New nickname:", settings.nickname);
        if (n != null && !n.trim().isEmpty()) {
            settings.nickname = n.trim();
            settings.save();
            for (ServerTab tab : tabs) tab.session().setNickname(settings.nickname);
        }
    }

    private void showAbout() {
        JOptionPane.showMessageDialog(this,
                "TS3J Swing Client\n\n" +
                        "An open-source TeamSpeak 3 desktop client built on the ts3j\n" +
                        "reverse-engineered protocol library, with native Opus voice,\n" +
                        "voice-activation detection and push-to-talk.\n\n" +
                        statusBar.codecText(),
                "About TS3J", JOptionPane.INFORMATION_MESSAGE);
    }

    // ---- toolbar / status ----

    private void updateToolbar() {
        boolean connected = selected != null && selected.session().isConnected();
        boolean anyConnected = sessions.anyConnected();

        boolean micMuted = connected && selected.session().isMicMuted();
        boolean deaf = connected && selected.session().isDeafened();
        boolean active = selected != null && selected == micTab();
        boolean away = connected && selected.session().isAway();
        boolean commander = connected && selected.session().isCommander();
        toolbar.refresh(connected, anyConnected, micMuted, deaf, active, away);
        menuBar.refresh(connected, away, commander);
        updateTray();
    }

    /**
     * The server the tray icon speaks for: the one holding the microphone, or the
     * visible one when nobody is capturing.
     */
    private ServerTab trayTab() {
        ServerTab micTab = micTab();
        if (micTab != null && micTab.session().isConnected()) return micTab;
        return selected != null && selected.session().isConnected() ? selected : null;
    }

    private void installTray() {
        if (shuttingDown.get()) return;
        tray = new TrayController(this, this::quit);
        updateTray();
    }

    private void updateTray() {
        if (tray == null) return;
        ServerTab tab = trayTab();
        if (tab == null) {
            tray.update(SelfState.DISCONNECTED, null);
        } else {
            tray.update(tab.session().selfState(), tab.session().title());
        }
    }

    private void updateStatusLabel() {
        statusBar.setStatus(selected == null ? "Not connected" : selected.session().status());
    }

    private void updateConnectionStatus() {
        ServerTab tab = selected;
        if (tab == null || !tab.session().isConnected()) return;
        int users = tab.connection().getModel().clientCount();
        StringBuilder s = new StringBuilder("Connected to ")
                .append(tab.connection().getModel().getServerName())
                .append("  |  ").append(users).append(users == 1 ? " user" : " users");
        double ping = tab.connection().getPingMillis();
        if (ping >= 0) s.append("  |  ping ").append(Math.round(ping)).append(" ms");
        if (tab != micTab()) s.append("  |  microphone on another tab");
        statusBar.setStatus(s.toString());
    }
}