using System;
using UnityEngine;

namespace HPJ.Presentation.Agents
{
    /// <summary>
    /// A example ground cast that connects a agent to the ground
    /// </summary>
    public class AgentGroundCast : MonoBehaviour
    {
        [SerializeField]
        private LayerMask _groundLayers;
        [SerializeField]
        private Transform _raycastSpot;
        [SerializeField]
        private float _rayCastDistance;
        public float RayCastDistance { get { return _rayCastDistance; } set { _rayCastDistance = value; } }
        [SerializeField]
        private float _rayCastElevatedDistance;
        public float RayCastElevatedDistance { get { return _rayCastElevatedDistance; } set { _rayCastElevatedDistance = value; } }
        [SerializeField]
        [Range(1, 10)]
        private int _rayCastEveryXFrames = 3;
        public int RayCastEveryXFrames { get { return _rayCastEveryXFrames; } set { _rayCastEveryXFrames = value; } }
        [SerializeField]
        private Transform _effectTransform;
        [SerializeField]
        private float _floatAmount;
        public float FloatAmount { get { return _floatAmount; } set { _floatAmount = value; } }
        [SerializeField]
        private Vector3 _raycastDirection = Vector3.down;
        public Vector3 RaycastDirection { get { return _raycastDirection; } set { _raycastDirection = value; } }
        [SerializeField]
        private bool AttemptTeleportUpOnFail = false;

        private RaycastHit _rayHit;
        private int _physicsCheckCounter = 0;
        // Update is called once per frame
        public void PhysicsCheck()
        {
            _physicsCheckCounter++;
            if (_physicsCheckCounter >= _rayCastEveryXFrames)
            {
                _physicsCheckCounter = 0;
                if (Physics.Raycast(_raycastSpot.position - _raycastDirection * _rayCastElevatedDistance, _raycastDirection, out _rayHit, _rayCastDistance + _rayCastElevatedDistance, _groundLayers))
                {
                    //Debug.Log("Move");
                    _effectTransform.transform.position = _rayHit.point - FloatAmount * _raycastDirection;
                }
                else if (Physics.Raycast(transform.position - _raycastDirection * _rayCastElevatedDistance, _raycastDirection, out _rayHit, _rayCastDistance + _rayCastElevatedDistance, _groundLayers))
                {
                    //Debug.Log("Move 2");
                    _effectTransform.transform.position = _rayHit.point - FloatAmount * _raycastDirection;
                }
                else if (AttemptTeleportUpOnFail)
                {
                    TeleportUp();
                }
            }
        }

        public void TeleportUp()
        {
            if (Physics.Raycast(_raycastSpot.position - _raycastDirection * 30, _raycastDirection, out _rayHit, _rayCastDistance * 60, _groundLayers))
            {
                //Debug.Log("Teleport");
                _effectTransform.transform.position = _rayHit.point - FloatAmount * _raycastDirection;
            }
        }
    }
}