using UnityEngine;

[RequireComponent(typeof(AudioSource))]
public class MicrophoneTesting : MonoBehaviour
{
    [Header("Mic settings")]
    [Tooltip("Leave empty for default device")]
    public string deviceName = "";
    [Range(1, 60)] public int bufferLengthSec = 10;   // rolling buffer for mic clip
    public int requestedSampleRate = 48000;           // 48000 is best match for Quest & many headsets
    public bool playOnStart = true;

    [Header("Runtime")]
    public bool isRecording;
    public bool isPlaying;

    private AudioSource _src;
    private AudioClip _micClip;

    void Awake()
    {
        _src = GetComponent<AudioSource>();
        _src.loop = true;                 // continuous playback
        _src.playOnAwake = false;         // we will start manually
    }

    void Start()
    {
        if (playOnStart)
            StartLoopback();
    }

    public void StartLoopback()
    {
        if (isRecording) return;

        // Pick default mic if none specified
        string dev = deviceName;
        if (string.IsNullOrEmpty(dev) && Microphone.devices.Length > 0)
            dev = Microphone.devices[0];

        // Optionally query supported sample range
        Microphone.GetDeviceCaps(dev, out int minFreq, out int maxFreq);
        int sampleRate = requestedSampleRate;
        if (minFreq != 0 && maxFreq != 0)
        {
            // Clamp to supported range
            sampleRate = Mathf.Clamp(requestedSampleRate, minFreq, maxFreq);
        }

        // Start recording into an AudioClip Unity manages
        _micClip = Microphone.Start(dev, true, bufferLengthSec, sampleRate);
        isRecording = true;

        Debug.Log("Recording started. device name:");
        Debug.Log(Microphone.GetPosition(deviceName));

        // Wait until the mic has written at least one sample
        StartCoroutine(PlayWhenReady());
    }

    System.Collections.IEnumerator PlayWhenReady()
    {
        // Ensure mic buffer has started writing
        Debug.Log("device name: " + deviceName);
        while (Microphone.GetPosition(deviceName) <= 0)
        {
            Debug.Log("Stuck in enumerator");
            yield return null;
        }

        _src.clip = _micClip;
        Debug.Log("Playing clip " +  _src.clip);
        _src.Play();
        isPlaying = true;
    }

    public void StopLoopback()
    {
        if (!isRecording) return;

        _src.Stop();
        if (_micClip != null)
        {
            Microphone.End(null); // stop default device
            _micClip = null;
        }
        isPlaying = false;
        isRecording = false;
    }

    void OnDisable()
    {
        StopLoopback();
    }
}