using AVFoundation;
using Foundation;

namespace VoiceCat.Mac;

internal enum SoundEvent { ChannelJoin, ChannelLeave, ChannelReceived, ChannelSent, PrivateReceived, PrivateSent, Login, Logout, ConnectionLost, VoiceOn, VoiceOff, VoiceStart, VoiceStop, PushToTalk }

internal sealed class EventFeedback : IDisposable
{
    private readonly MacSettings settings;
    private readonly AVSpeechSynthesizer speech = new();
    private readonly Dictionary<SoundEvent, AVAudioPlayer> players = [];

    internal EventFeedback(MacSettings settings) => this.settings = settings;

    internal void Play(SoundEvent sound)
    {
        if (!settings.EventSounds || settings.EventVolume <= 0 ||
            (sound is SoundEvent.VoiceStart or SoundEvent.VoiceStop && !settings.SelfTalkSounds) ||
            (sound == SoundEvent.PushToTalk && !settings.PushToTalkSound)) return;
        if (!players.TryGetValue(sound, out AVAudioPlayer? player))
        {
            string path = Path.Combine(NSBundle.MainBundle.ResourcePath ?? "", "Sounds", FileName(sound) + ".wav");
            if (!File.Exists(path)) return;
            player = AVAudioPlayer.FromUrl(NSUrl.FromFilename(path));
            if (player is null) return;
            player.PrepareToPlay(); players[sound] = player;
        }
        player.Volume = settings.EventVolume; player.CurrentTime = 0; player.Play();
    }

    internal void Speak(string text)
    {
        if (!settings.SpokenEvents || string.IsNullOrWhiteSpace(text)) return;
        speech.SpeakUtterance(new AVSpeechUtterance(text.Trim()));
    }

    private static string FileName(SoundEvent value) => value switch
    {
        SoundEvent.ChannelJoin => "channel_join", SoundEvent.ChannelLeave => "channel_leave",
        SoundEvent.ChannelReceived => "channel_recv", SoundEvent.ChannelSent => "channel_sent",
        SoundEvent.PrivateReceived => "pm_recv", SoundEvent.PrivateSent => "pm_sent",
        SoundEvent.Login => "login", SoundEvent.Logout => "logout", SoundEvent.ConnectionLost => "connection_lost",
        SoundEvent.VoiceOn => "voice_on", SoundEvent.VoiceOff => "voice_off", SoundEvent.VoiceStart => "va_start",
        SoundEvent.VoiceStop => "va_stop", _ => "ptt"
    };

    public void Dispose() { foreach (AVAudioPlayer player in players.Values) player.Dispose(); speech.Dispose(); }
}