using Ryuclaw.Shared.Speech;
using AVFoundation;

namespace Ryuclaw.Speech.MacOS { 

    public class TTS : ISpeech {
        private float Rate { get; set; }
        private float Pitch { get; set; }
        private AVSpeechSynthesizer Synth;
        private AVSpeechSynthesisVoice Voice;

        public TTS()
        {
            Synth = new AVSpeechSynthesizer();
            Rate = 1;
            Pitch = 1;
            Voice = AVSpeechSynthesisVoice.FromIdentifier(AVSpeechSynthesisVoice.IdentifierAlex);
            
        }

        public void SetRate(float rate)
        {
            Rate = rate;
        }

        public void SetPitch(float pitch)
        {
            Pitch = pitch;
        }

        public List<string> GetVoices()
        {
            var availableVoices = AVSpeechSynthesisVoice.GetSpeechVoices();
            List<string> voices = new();
            foreach (var voice in availableVoices)
            {
                voices.Add(voice.Name);
            }
            return null;
        }

        public void SetVoice(string name)
        {
            foreach (var voice in AVSpeechSynthesisVoice.GetSpeechVoices())
            {
                if (voice.Name.Equals(name))
                {
                    Voice = voice;
                    return;
                }
            }
            Voice = AVSpeechSynthesisVoice.FromIdentifier(AVSpeechSynthesisVoice.IdentifierAlex);
        }

        public void Speak(string text)
        {
            var utterance = new AVSpeechUtterance(text);
            utterance.Rate = Rate;
            utterance.PitchMultiplier = Pitch;
            utterance.Voice = Voice;
            utterance.PrefersAssistiveTechnologySettings = true;
            
            Synth.SpeakUtterance(utterance);
        }

        public void Stop()
        {
            Synth.StopSpeaking(AVSpeechBoundary.Immediate);
        }
        
    }
}