using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.XR;
using Valve.VR;

namespace SicknessReduction.Visual
{
    public class VirtualNose : MonoBehaviour
    {
        public GameObject prefabToSpawn;
        public Vector3 padding;

        public bool adjustToIpd = true;

        private Camera cam;
        private GameObject nose;

        private InputDevice leftEye;
        private InputDevice rightEye;

        private void OnEnable()
        {
            cam = Camera.main;
            if (cam == null)
            {
                Debug.LogWarning("No main camera found. Cannot place virtual nose!");
                return;
            }

            Debug.Log($"Main Camera IPD: {cam.stereoSeparation}");

            nose = Instantiate(prefabToSpawn, cam.transform);
            nose.transform.localPosition = Vector3.forward * cam.nearClipPlane + padding;
        }

        private void Start()
        {
            List<InputDevice> devices = new List<InputDevice>();
            InputDevices.GetDevicesWithCharacteristics(
                InputDeviceCharacteristics.Camera | InputDeviceCharacteristics.HeadMounted, devices);

            if (devices.Count == 0)
            {
                Debug.LogWarning("No devices");
                return;
            }

            devices[0].TryGetFeatureValue(CommonUsages.rightEyePosition, out var reye);
            devices[0].TryGetFeatureValue(CommonUsages.leftEyePosition, out var leye);

            Debug.Log($"Eyes: {leye}, {reye}");
        }

        private void OnDisable()
        {
            if (nose == null) return;
            Destroy(nose);
        }
    }
}