using Assets.WasapiAudio.Scripts.Core;
using UnityEngine;
using UnityEngine.UI;

[ExecuteAlways]
public class AudioSource : MonoBehaviour {
    public WasapiCaptureType CaptureType = WasapiCaptureType.Loopback;
    public int SpectrumSize = 32;
    public int MinFrequency = 100;
    public int MaxFrequency = 20000;
    public ScalingStrategy ScalingStrategy = ScalingStrategy.Sqrt;
    public WasapiAudioFilter[] Filters;

    public Preferences preferences;
    public Texture speakerTexture;
    public Texture micTexture;

    private WasapiAudio _wasapiAudio;
    private float[] _spectrumData;

    public void Start() {
        CaptureType = preferences.data.useLoopback
            ? WasapiCaptureType.Loopback
            : WasapiCaptureType.Microphone;

        // Debug.Log($"Pref: {preferences.data.useLoopback} {CaptureType}");

        Initialise();
    }

    void Initialise() {
        bool isLoopback = CaptureType == WasapiCaptureType.Loopback;
        SetImageTexture(isLoopback);

        _wasapiAudio?.StopListen();

        _wasapiAudio = new WasapiAudio(CaptureType, SpectrumSize, ScalingStrategy, MinFrequency, MaxFrequency, Filters, spectrumData => {
            _spectrumData = spectrumData;
        });

        _wasapiAudio.StartListen();
    }

    public float[] GetSpectrumData() {
        return _spectrumData;
    }

    void OnDestroy() {
        _wasapiAudio?.StopListen();
    }

    public void ToggleCaptureType() {
        if (CaptureType == WasapiCaptureType.Loopback) {
            UseMicrophone();
        } else {
            UseLoopback();
        }

    }

    void UseMicrophone() {
        CaptureType = WasapiCaptureType.Microphone;
        preferences.SetUseLoopback(false);
        try {
            Initialise();
        } catch {
            Debug.Log("Microphone unavailable");
            // prevents the StopListen check from
            // running on a half initialised object
            _wasapiAudio = null;
            UseLoopback();
        }
    }

    void UseLoopback() {
        CaptureType = WasapiCaptureType.Loopback;
        preferences.SetUseLoopback(true);
        Initialise();
    }

    void SetImageTexture(bool useLoopback) {
        RawImage image = GetComponent<RawImage>();

        if (!image) return;

        image.texture = useLoopback
            ? speakerTexture
            : micTexture;
    }

}