using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;

[RequireComponent(typeof(ARTrackedImageManager))]
public class PlaceTrackedImages : MonoBehaviour
{
    // Reference to AR tracked image manager component
    private ARTrackedImageManager _trackedImagesManager;

    // List of prefabs to instantiate - these should be named the same
    // as their corresponding 2D images in the reference image library 
    public GameObject[] ArPrefabs;
    bool isSummoned = false;

    private readonly Dictionary<string, GameObject> _instantiatedPrefabs = new Dictionary<string, GameObject>();
    //  foreach(var trackedImage in eventArgs.added){
    // Get the name of the reference image
    //   var imageName = trackedImage.referenceImage.name;
    //   foreach (var curPrefab in ArPrefabs) {
    // Check whether this prefab matches the tracked image name, and that
    // the prefab hasn't already been created
    //  if (string.Compare(curPrefab.name, imageName, StringComparison.OrdinalIgnoreCase) == 0
    //   && !_instantiatedPrefabs.ContainsKey(imageName)){
    // Instantiate the prefab, parenting it to the ARTrackedImage
    //  var newPrefab = Instantiate(curPrefab, trackedImage.transform);
    void Awake()
    {
        _trackedImagesManager = GetComponent<ARTrackedImageManager>();
    }
    private void OnEnable()
    {
        _trackedImagesManager.trackedImagesChanged += OnTrackedImagesChanged;
    }
    private void OnDisable()
    {
        _trackedImagesManager.trackedImagesChanged -= OnTrackedImagesChanged;
    }
    private void OnTrackedImagesChanged(ARTrackedImagesChangedEventArgs eventArgs)
    {
        //foreach (var trackedImage in eventArgs.updated)
        //{
        // var imageName = trackedImage.referenceImage.name;
        //foreach (var curPrefab in AreaEffector2DPrefabs)
        // {
        // if (string.Compare(curPrefab.name, imageName, StringComparison.OrdinalIgnoreCase) == 0
        //  && !_instantiatedPrefabs.ContainsKey(imageName))
        //  {
        //  var newPrefab = Instantiate(curPrefab, trackedImage.transform);
        //   _instantiatedPrefabs[imageName] = newPrefab;
        // }
        // }
        // }
        //_instantiatedPrefabs[trackedImage.referenceImage.name].SetActive(trackedImage.trackingState == TrackingState.Tracking);
        //}

        if (!isSummoned)
        {
            foreach (var trackedImage in eventArgs.added)
            {
                var imageName = trackedImage.referenceImage.name;

                foreach (var curPrefab in ArPrefabs)
                {
                    if (string.Compare(curPrefab.name, imageName, StringComparison.OrdinalIgnoreCase) == 0
                        && !_instantiatedPrefabs.ContainsKey(imageName))
                    {
                        isSummoned = true;
                        Vector3 pos = curPrefab.transform.position;
                        Quaternion quat = new Quaternion(0, 0, 0, 0);
                        var newPrefab = Instantiate(curPrefab, pos, quat);
                        _instantiatedPrefabs[imageName] = newPrefab;
                        OnDisable();
                    }

                }
            }
        }


      //  foreach (var trackedImage in eventArgs.updated)
    //    {
  //          _instantiatedPrefabs[trackedImage.referenceImage.name].SetActive(trackedImage.trackingState == TrackingState.Tracking);
//        }


        //foreach (var trackedImage in eventArgs.removed)
        //{
            // Destroy its prefab
            //Destroy(_instantiatedPrefabs[trackedImage.referenceImage.name]);
            // Also remove the instance from our array
            //_instantiatedPrefabs.Remove(trackedImage.referenceImage.name);
            // Or, simply set the prefab instance to inactive
            //_instantiatedPrefabs[trackedImage.referenceImage.name].SetActive(false);
        //}
    }
}