using System.Collections.Generic;
using UnityEngine;

// Use Script in parent Folder of all humans
public class ChangeCubeMaterial : MonoBehaviour
{
    public Material highlightRed;
    public Material highlightGreen;
    public int threshold = 1;
    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);
            }
        }

        //foreach (Component lst in allHumansTransform)
        //{
        //    Debug.Log(lst.gameObject.name);
        //}
    }

    private void Update()
    {
        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"));
            
            // if Humans only hits themselves (threshold == 1) or nobody, then Material change to Green
            if(hitHumans.Length <= threshold)
            {
                Debug.Log(lst.gameObject.name + " set to Green");
                lst.GetComponent<MeshRenderer>().material = highlightGreen;
            }

            // if Humans hits somebody else (threshold >= 1), then Material change to Red
            foreach (Collider hitHuman in hitHumans)
            {
                if (lst.gameObject.name != hitHuman.gameObject.name) // overlap with themselves
                {
                    if (hitHuman.GetComponent<MeshRenderer>().material != highlightRed || lst.GetComponent<MeshRenderer>().material != highlightRed)
                    {
                        Debug.Log(lst.gameObject.name + " overlaps with " + hitHuman.gameObject.name);
                        hitHuman.GetComponent<MeshRenderer>().material = highlightRed;
                        lst.GetComponent<MeshRenderer>().material = highlightRed;
                    }
                }
            }
        }
    }

}