using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class fieldOfView : MonoBehaviour
{
    [SerializeField]  private float viewRadius;
    
    [SerializeField] [Range(0, 360)] private float viewAngle;

    public Transform target;
    public LayerMask playerMask;
    public LayerMask obstacleMask;

    private void Update()
    {
        FindPlayer();

    }

    void FindPlayer()
    {
        Collider[] targetInViewRadius = Physics.OverlapSphere(transform.position, viewRadius, playerMask);
        for (int i = 0; i < targetInViewRadius.Length; i++)
        {
            target = targetInViewRadius[i].transform;
            Vector3 dirToTarget = (target.position - transform.position).normalized;
            if (Vector3.Angle(transform.forward, dirToTarget) < viewAngle/2)
            {
                float distToTarget = Vector3.Distance(transform.position, target.position);

                if (!Physics.Raycast(transform.position,dirToTarget, distToTarget,obstacleMask))
                {
                    print( "enemy saw the target");
                   
                }
            }
        }
        
    }

    public Vector3 DirFromAngle(float angleInDegrees, bool angleIsGlobal)
    {
        if (!angleIsGlobal)
        {
            angleInDegrees += transform.eulerAngles.y;
        }
        return new Vector3(Mathf.Sin(angleInDegrees * Mathf.Deg2Rad), 0 , Mathf.Cos(angleInDegrees * Mathf.Deg2Rad));
    }

    private void OnDrawGizmos()
    {
        Gizmos.DrawWireSphere(transform.position, viewRadius);
        Vector3 viewAngleA = DirFromAngle(-viewAngle / 2, false);
        Vector3 viewAngleB = DirFromAngle(viewAngle / 2, false);
        Gizmos.DrawLine(transform.position, transform.position + viewAngleA * viewRadius);
        Gizmos.DrawLine(transform.position, transform.position + viewAngleB * viewRadius);
        Gizmos.DrawLine(transform.position, target.position);
    }
}