using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using BITKit;
using UnityEngine.Events;
using UnityEngine.UIElements;
namespace BITKit
{
    public class WorldToScreenPoint : MonoBehaviour
    {
        [Header(Constant.Header.Settings)]
        [SerializeField] private Transform root;
        [SerializeField] private Optional<Vector3> localOffset;
        [SerializeField] private Optional<Vector3> worldOffset;
        [SerializeField] private Optional<float> activeDistance;
        
        [Header(Constant.Header.Events)]
        [SerializeField] private UnityEvent<bool> setHeaderEnabled; 
        [SerializeField] private UnityEvent<Vector3> setHeaderPosition;
        
        private Transform cameraTrans;
        private void Start()
        {
            if (Camera.main != null) cameraTrans = Camera.main.transform;
        }
        private void Update()
        {
            var position = root.position;
            if (localOffset.Allow)
            {
                position += root.rotation * localOffset;
            }

            if (worldOffset.Allow)
            {
                position+=worldOffset;
            }

            setHeaderPosition.Invoke(position);

            if (activeDistance.Allow)
            {
                var distance = Vector3.Distance(position, cameraTrans.position);
                var _enabled = distance < activeDistance;
                setHeaderEnabled.Invoke(_enabled);
            }
        }
    }
}