using Foundation;
using VoiceCat.Audio;

namespace VoiceCat.Mac;

internal sealed class MacSettings
{
    private readonly NSUserDefaults values = NSUserDefaults.StandardUserDefaults;

    internal AudioInputMode InputMode { get; set; } = AudioInputMode.VoiceActivation;
    internal float VadThreshold { get; set; } = 0.05f;
    internal float InputGain { get; set; } = 1f;
    internal float OutputGain { get; set; } = 0.8f;
    internal bool InputNoiseReduction { get; set; }
    internal bool StereoMicrophone { get; set; }
    internal ushort PushToTalkKeyCode { get; set; } = 0x60;
    internal string? InputDeviceId { get; set; }
    internal string? OutputDeviceId { get; set; }
    internal bool AuxiliaryEnabled { get; set; }
    internal string? AuxiliaryDeviceId { get; set; }
    internal float AuxiliaryGain { get; set; } = 1f;
    internal bool EventSounds { get; set; } = true;
    internal bool SpokenEvents { get; set; }
    internal float EventVolume { get; set; } = 1f;
    internal bool SelfTalkSounds { get; set; }
    internal bool PushToTalkSound { get; set; }

    internal void Load()
    {
        NSString[] keys = [(NSString)"voice.inputMode", (NSString)"voice.vadThreshold", (NSString)"voice.inputGain", (NSString)"voice.outputGain",
            (NSString)"voice.pttKeyCode", (NSString)"voice.auxGain", (NSString)"feedback.sounds", (NSString)"feedback.volume"];
        NSObject[] defaults = [NSNumber.FromInt32((int)AudioInputMode.VoiceActivation), NSNumber.FromFloat(0.05f),
            NSNumber.FromFloat(1f), NSNumber.FromFloat(0.8f), NSNumber.FromInt32(0x60), NSNumber.FromFloat(1f),
            NSNumber.FromBoolean(true), NSNumber.FromFloat(1f)];
        values.RegisterDefaults(new NSDictionary<NSString, NSObject>(keys, defaults));
        InputMode = Enum.IsDefined(typeof(AudioInputMode), (int)values.IntForKey("voice.inputMode"))
            ? (AudioInputMode)(int)values.IntForKey("voice.inputMode") : AudioInputMode.VoiceActivation;
        VadThreshold = Math.Clamp(values.FloatForKey("voice.vadThreshold"), 0f, 1f);
        InputGain = Math.Clamp(values.FloatForKey("voice.inputGain"), 0f, 4f);
        OutputGain = Math.Clamp(values.FloatForKey("voice.outputGain"), 0f, 1f);
        InputNoiseReduction = values.BoolForKey("voice.inputNoiseReduction");
        StereoMicrophone = values.BoolForKey("voice.stereoMic");
        PushToTalkKeyCode = checked((ushort)Math.Clamp(values.IntForKey("voice.pttKeyCode"), 0, ushort.MaxValue));
        InputDeviceId = EmptyToNull(values.StringForKey("voice.inputDevice"));
        OutputDeviceId = EmptyToNull(values.StringForKey("voice.outputDevice"));
        AuxiliaryEnabled = values.BoolForKey("voice.auxEnabled");
        AuxiliaryDeviceId = EmptyToNull(values.StringForKey("voice.auxDeviceUID"));
        AuxiliaryGain = Math.Clamp(values.FloatForKey("voice.auxGain"), 0f, 4f);
        EventSounds = values.BoolForKey("feedback.sounds");
        SpokenEvents = values.BoolForKey("feedback.speech");
        EventVolume = Math.Clamp(values.FloatForKey("feedback.volume"), 0f, 1f);
        SelfTalkSounds = values.BoolForKey("feedback.selfTalk");
        PushToTalkSound = values.BoolForKey("feedback.ptt");
    }

    internal void Save()
    {
        values.SetInt((int)InputMode, "voice.inputMode"); values.SetFloat(VadThreshold, "voice.vadThreshold");
        values.SetFloat(InputGain, "voice.inputGain"); values.SetFloat(OutputGain, "voice.outputGain");
        values.SetBool(InputNoiseReduction, "voice.inputNoiseReduction"); values.SetBool(StereoMicrophone, "voice.stereoMic");
        values.SetInt(PushToTalkKeyCode, "voice.pttKeyCode"); Set("voice.inputDevice", InputDeviceId); Set("voice.outputDevice", OutputDeviceId);
        values.SetBool(AuxiliaryEnabled, "voice.auxEnabled"); Set("voice.auxDeviceUID", AuxiliaryDeviceId); values.SetFloat(AuxiliaryGain, "voice.auxGain");
        values.SetBool(EventSounds, "feedback.sounds"); values.SetBool(SpokenEvents, "feedback.speech"); values.SetFloat(EventVolume, "feedback.volume");
        values.SetBool(SelfTalkSounds, "feedback.selfTalk"); values.SetBool(PushToTalkSound, "feedback.ptt"); values.Synchronize();
    }

    private void Set(string key, string? value) { if (value is null) values.RemoveObject(key); else values.SetString(value, key); }
    private static string? EmptyToNull(string? value) => string.IsNullOrWhiteSpace(value) ? null : value;
}