using System.Collections.Generic;
using UnityEngine;

public class EnemyTargetManager : MonoBehaviour
{
    [SerializeField]
    private List<Transform> targetPoints = new List<Transform>();

    public Transform GetClosestActiveTarget(Vector3 position)
    {
        List<Transform> closestTargets =
            new List<Transform>();

        float closestDistanceSqr = float.MaxValue;

        foreach (Transform target in targetPoints)
        {
            if (target == null || !target.gameObject.activeInHierarchy)
                continue;

            float distanceSqr =
                (target.position - position).sqrMagnitude;

            if (distanceSqr < closestDistanceSqr)
            {
                closestDistanceSqr = distanceSqr;

                closestTargets.Clear();
                closestTargets.Add(target);
            }
            else if (Mathf.Approximately(
                distanceSqr,
                closestDistanceSqr))
            {
                closestTargets.Add(target);
            }
        }

        if (closestTargets.Count == 0)
            return null;

        int randomIndex = Random.Range(
            0,
            closestTargets.Count
        );

        return closestTargets[randomIndex];
    }
}