using System.Collections.Generic;
using UnityEngine;


// Use this Script in parent folder of all Humans
public class ChangeModelTransMaterial : MonoBehaviour
{
    [Header("Highlighting Materials:")]
    public Material highlightRed;
    public Material highlightGreen;
    public Material highlightYellow;

    [Header("Highlighting Transparent Materials:")]
    public Material highlightTransRed;
    public Material highlightTransGreen;
    public Material highlightTransYellow;

    [Header("Thresholds:")]
    [Tooltip("The maximum number of people (including the observed) that will be colored green.\n Threshold Green = 1 means that no further person is allowed to approach.")]
    public int thresholdGreen = 1;
    [Tooltip("The maximum number of people (including the observed) that will be colored yellow.\n Threshold Yellow = 2 means that only one other person may approach.")]
    public int thresholdYellow = 2;
    
    [Space]
    public float radius = 1f;

    private Vector3 center;
    private Collider[] hitHumans;
    private List<Component> allHumansTransform = new List<Component>(); // only first depth children of parent (Humans)

    // Start is called before the first frame update
    private void Start()
    {
        Component[] allTransform = GetComponentsInChildren<Transform>(); // all possible children of parent object
        foreach (Transform child in allTransform)
        {
            if (child.parent == allTransform[0])
            {
                allHumansTransform.Add(child);
            }
        }
    }

    //private void OnDrawGizmos()
    //{
    //    foreach (Component lst in allHumansTransform)
    //    {
    //        Gizmos.color = Color.blue;
    //        Gizmos.DrawWireSphere(lst.transform.position, radius);
    //    }
    //}

    private void FixedUpdate()
    {
        foreach (Component lst in allHumansTransform)
        {
            center = lst.GetComponent<Transform>().position;
            // only collisions with Layer "Humans" are listed in "hitHumans"
            hitHumans = Physics.OverlapSphere(center, radius, LayerMask.GetMask("Humans"));

            bool differentTag = false;
            foreach (Collider hitHuman in hitHumans)
            {
                if (lst.CompareTag(hitHuman.tag))
                    differentTag = false;
                else
                {
                    differentTag = true;
                    break;
                }
            }

            // if Human hits lesser then thresholdYellow but is hitting minimum 1 other human, then Material change to Green
            if (hitHumans.Length <= thresholdGreen)
            {
                if (!differentTag)
                {
                    Debug.Log(lst.gameObject.name + " set to Green");
                    lst.transform.Find("BasicMotionsDummyModel").Find("DummyMesh").gameObject.GetComponent<SkinnedMeshRenderer>().material = highlightGreen;
                }
                else
                {
                    Debug.Log(lst.gameObject.name + " set to Trans Green");
                    lst.transform.Find("BasicMotionsDummyModel").Find("DummyMesh").gameObject.GetComponent<SkinnedMeshRenderer>().material = highlightTransGreen;
                }
            }
            // if Human hits lesser then thresholdYellow but is hitting minimum 1 other human, then Material change to Yellow
            else if (hitHumans.Length <= thresholdYellow)
            {
                if (!differentTag)
                {
                    Debug.Log(lst.gameObject.name + " set to Yellow");
                    lst.transform.Find("BasicMotionsDummyModel").Find("DummyMesh").gameObject.GetComponent<SkinnedMeshRenderer>().material = highlightYellow;
                }
                else
                {
                    Debug.Log(lst.gameObject.name + " set to Trans Yellow");
                    lst.transform.Find("BasicMotionsDummyModel").Find("DummyMesh").gameObject.GetComponent<SkinnedMeshRenderer>().material = highlightTransYellow;
                }
            }
            // everything else change to Red
            else
            {
                if (!differentTag)
                {
                    Debug.Log(lst.gameObject.name + " set to Red");
                    lst.transform.Find("BasicMotionsDummyModel").Find("DummyMesh").gameObject.GetComponent<SkinnedMeshRenderer>().material = highlightRed;
                }
                else
                {
                    Debug.Log(lst.gameObject.name + " set to Trans Red");
                    lst.transform.Find("BasicMotionsDummyModel").Find("DummyMesh").gameObject.GetComponent<SkinnedMeshRenderer>().material = highlightTransRed;
                }
            }
        }
    }
}