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

namespace Beyond
{
    [ExecuteInEditMode]
    public class LookAtInEditMode : MonoBehaviour
    {
#if UNITY_EDITOR
        public GameObject lookAtMe;
        public bool updateY;
        public bool forward = true;
        public bool grounded;
        public LayerMask ground = ~0;//1 + 2 + 4 + 8 + 16 + 32 + 64 + 128 + 256 + 512 + 1024 + 2048 + 4096 + 8192 + 16384;
        public Vector3 groundOffset;
        public Vector3 rotationOffset;
        [Space]
        public bool stopRotating;
        public bool resetToOrginal;
        private Vector3 targetPoint;
        private Quaternion targetRotation;
        private Vector3 startPosition;
        private Quaternion startRotation;

        private void Start()
        {
            startPosition = transform.position;
            startRotation = transform.rotation;
        }

        // Update is called once per frame
        void Update()
        {
            if (resetToOrginal)
            {
                resetToOrginal = false;
                transform.position = startPosition;
                transform.rotation = startRotation;
            }

            if (lookAtMe != null && !stopRotating)
            {
                if (updateY)
                {
                    targetPoint = new Vector3(lookAtMe.transform.position.x, lookAtMe.transform.position.y, lookAtMe.transform.position.z) - transform.position;
                }
                else
                {
                    targetPoint = new Vector3(lookAtMe.transform.position.x, transform.position.y, lookAtMe.transform.position.z) - transform.position;
                }
                if (forward)
                {
                    targetRotation = Quaternion.LookRotation(targetPoint, Vector3.up);
                }
                else
                {
                    targetRotation = Quaternion.LookRotation(-targetPoint, Vector3.up);
                }
                transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, 1f) * Quaternion.Euler(rotationOffset);
            }
            if (grounded)
            {
                grounded = false;
                Ray ray = new Ray(transform.position, Vector3.down);
                if (Physics.Raycast(ray, out RaycastHit hit, float.MaxValue, ground))
                {
                    transform.position = hit.point + groundOffset;
                }
            }
        }

        private void OnDrawGizmos()
        {
            Gizmos.DrawRay(transform.position, transform.forward);
        }
#endif
    }
}