using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using Cysharp.Threading.Tasks;
using UnityEngine;
using UnityEngine.Events;

namespace BITKit.Sensors
{
    public class TriggerSensor : MonoBehaviour, ISensor
    {
        [Header(Constant.Header.Settings)] [SerializeField]
        private List<GameObject> ignores = new();

        [Header(Constant.Header.Events)] public UnityEvent<Collider> onDetected = new();
        public UnityEvent<Collider> onLost = new();

        [Header(Constant.Header.InternalVariables)]
        // ReSharper disable once FieldCanBeMadeReadOnly.Local
        private List<Collider> detected = new();

        private void OnTriggerEnter(Collider _collider)
        {
            if (_collider.gameObject.isStatic) return;
            if (IsValid(_collider) is false) return;
            if (detected.Contains(_collider)) return;
            detected.Add(_collider);
            onDetected.Invoke(_collider);
        }

        private void OnTriggerExit(Collider _collider)
        {
            if (_collider.gameObject.isStatic) return;
            if (IsValid(_collider) is false) return;
            if (!detected.Remove(_collider)) return;
            onLost.Invoke(_collider);
        }

        private void OnCollisionEnter(Collision collision)
        {
            var _collider = collision.collider;
            if (!IsValid(_collider)) return;
            detected.Add(_collider);
            onDetected.Invoke(_collider);
        }

        private void OnCollisionStay(Collision collision)
        {
            var _collider = collision.collider;
            if (detected.TryRemove(_collider))
            {
                onLost.Invoke(_collider);
            }
        }

        public IEnumerable<Transform> Get() => detected.Select(x => x.transform).ToArray();

        public bool IsValid(Collider _collider) => ignores.Contains(_collider.gameObject) is false;

        public float GetDistance()
        {
            throw new System.NotImplementedException();
        }

        public UniTask Execute()
        {
            throw new System.NotImplementedException();
        }
    }
}