package com.ts3client.ui;

import com.ts3client.audio.OpusParameters;
import com.ts3client.audio.VoiceInput;
import com.ts3client.audio.VoiceOutput;
import com.ts3client.config.Settings;
import com.ts3client.sound.SoundNotifier;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Frame;
import java.util.function.Consumer;

/**
 * Options dialog: a tabbed coordinator over the individual settings pages. Each tab owns
 * its own controls and reads/writes {@link Settings} on {@link #apply()}; this class wires
 * the tabs that preview themselves live against the running audio subsystem (the device
 * and voice-activation tabs, which share a single microphone test) and owns the
 * OK/Cancel/Apply plumbing.
 */
public final class SettingsDialog extends JDialog {

    private final Settings settings;
    private final VoiceInput liveMic;
    private final VoiceOutput livePlayback;
    private final Runnable onApply;

    private final DevicesPanel devicesPanel;
    private final VoiceActivationPanel voiceActivationPanel;
    private final NotificationsPanel notificationsPanel;
    private final IconPackPanel iconPackPanel;
    private final HotkeysPanel hotkeysPanel;
    private final ClientVersionPanel clientVersionPanel;

    public SettingsDialog(Frame owner, Settings settings,
                          VoiceInput liveMic, VoiceOutput livePlayback,
                          SoundNotifier sounds, HotkeyService hotkeys, Runnable onApply) {
        super(owner, "Options", true);
        this.settings = settings;
        this.liveMic = liveMic;
        this.livePlayback = livePlayback;
        this.onApply = onApply;

        notificationsPanel = new NotificationsPanel(settings, sounds);
        iconPackPanel = new IconPackPanel(settings);
        hotkeysPanel = new HotkeysPanel(hotkeys);
        clientVersionPanel = new ClientVersionPanel(settings);
        devicesPanel = new DevicesPanel(settings, livePlayback,
                this::applyLive, this::restartTest, this::setTestOutputDevice);
        voiceActivationPanel = new VoiceActivationPanel(settings, liveMic, hotkeys,
                hotkeysPanel, this::audioSnapshot);

        JTabbedPane tabs = new JTabbedPane();
        tabs.addTab("Playback / Capture", scrollable(devicesPanel));
        tabs.addTab("Voice Activation", scrollable(voiceActivationPanel));
        tabs.addTab("Notifications", notificationsPanel);
        tabs.addTab("Design", iconPackPanel);
        tabs.addTab("Hotkeys", hotkeysPanel);
        tabs.addTab("Client Version", scrollable(clientVersionPanel));

        JPanel buttons = new JPanel(new BorderLayout());
        JPanel right = new JPanel();
        JButton ok = new JButton("OK");
        JButton cancel = new JButton("Cancel");
        ok.addActionListener(e -> {
            apply();
            close();
        });
        cancel.addActionListener(e -> cancel());
        right.add(ok);
        right.add(cancel);
        buttons.add(right, BorderLayout.EAST);

        getContentPane().setLayout(new BorderLayout());
        getContentPane().add(tabs, BorderLayout.CENTER);
        getContentPane().add(buttons, BorderLayout.SOUTH);

        Dialogs.closeOnEscape(this, this::cancel);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        addWindowListener(new java.awt.event.WindowAdapter() {
            @Override
            public void windowClosed(java.awt.event.WindowEvent e) {
                voiceActivationPanel.stopTest();
            }
        });

        pack();
        setSize(new Dimension(480, 540));
        setMinimumSize(new Dimension(420, 360));
        setLocationRelativeTo(owner);
    }

    private static javax.swing.JScrollPane scrollable(JPanel content) {
        javax.swing.JScrollPane sp = new javax.swing.JScrollPane(content,
                javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        sp.setBorder(null);
        sp.getVerticalScrollBar().setUnitIncrement(16);
        return sp;
    }

    /** Copies the audio tabs into {@code target}, without touching anything else. */
    private void writeAudioSettings(Settings target) {
        devicesPanel.writeInto(target);
        voiceActivationPanel.writeInto(target);
    }

    /**
     * The audio tabs as a standalone {@link Settings}, so the microphone test chain runs
     * with the values currently on screen rather than the ones last saved.
     *
     * <p>The test always runs voice activation: it exists to tune the gate, and push-to-talk
     * would need the global hotkey, which belongs to the connected microphone.
     */
    private Settings audioSnapshot() {
        Settings snapshot = new Settings();
        writeAudioSettings(snapshot);
        if (snapshot.inputMode == Settings.InputMode.PUSH_TO_TALK) {
            snapshot.inputMode = Settings.InputMode.VOICE_ACTIVATION;
        }
        return snapshot;
    }

    private void apply() {
        writeAudioSettings(settings);
        notificationsPanel.apply();
        iconPackPanel.apply();
        clientVersionPanel.apply();
        hotkeysPanel.apply();
        settings.save();

        applyLive(m -> {
            m.setMode(settings.inputMode);
            m.setVadMode(settings.vadMode);
            m.setThresholdDb(settings.vadThresholdDb);
            m.setSpeechThreshold(settings.speechThreshold);
            m.setVadOverPtt(settings.vadOverPtt);
            m.setInputGain(settings.inputVolume);
            m.setNoiseSuppression(settings.denoise);
            m.setDenoiserLevel(settings.denoiserLevel);
            m.setTypingAttenuation(settings.typingAttenuation);
            m.setAgc(settings.agc);
            m.setOpusParameters(OpusParameters.from(settings));
        });
        if (livePlayback != null) {
            livePlayback.setMasterVolume(settings.outputVolume);
            livePlayback.setOutputDevice(settings.outputDevice);
        }
        if (onApply != null) onApply.run();
    }

    /** Leaves without applying, putting back the settings that preview themselves live. */
    private void cancel() {
        notificationsPanel.revert();
        iconPackPanel.revert();
        close();
    }

    private void close() {
        voiceActivationPanel.stopTest();
        dispose();
    }

    /**
     * Applies a live change to the connected microphone and to the microphone test alike.
     *
     * <p>Guarded against a null {@code voiceActivationPanel}: the Devices tab applies its
     * controls once as they are built, which happens before that tab exists.
     */
    private void applyLive(Consumer<VoiceInput> change) {
        if (liveMic != null) change.accept(liveMic);
        if (voiceActivationPanel != null) voiceActivationPanel.configureTest(change);
    }

    /** Restarts the microphone test, if running, so a device change takes effect. */
    private void restartTest() {
        if (voiceActivationPanel != null) voiceActivationPanel.restartTest();
    }

    private void setTestOutputDevice(String deviceId) {
        if (voiceActivationPanel != null) voiceActivationPanel.setTestOutputDevice(deviceId);
    }
}