using System.Collections.Generic;
using UnityEngine;

// Use Script in parent Folder of all humans
public class ChangeCapsuleMaterial : MonoBehaviour
{
    public Material highlightRed;
    public Material highlightGreen;
    public Material highlightYellow;
    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 <= 1)
            {
                Debug.Log(lst.gameObject.name + " set to Green");
                lst.GetComponent<MeshRenderer>().material = highlightGreen;
            }
            // if Human hits lesser then threshold but is hitting minimum 1 other human, then Material change to Yellow
            else if (hitHumans.Length <= threshold)
            {
                Debug.Log(lst.gameObject.name + " set to Yellow");
                lst.transform.GetChild(0).GetChild(0).gameObject.GetComponent<SkinnedMeshRenderer>().material = highlightYellow;
            }
            else
            {
                // 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;
                        }
                    }
                }
            }
        }
    }

}