RebootKit/Runtime/Engine/Code/Services/Simulation/Actor.cs

using System;
using System.Threading;
using Cysharp.Threading.Tasks;
using RebootKit.Engine.Foundation;
using UnityEngine;

namespace RebootKit.Engine.Services.Simulation {
    public class Actor : MonoBehaviour {
        [field: SerializeField]
        public SerializableGuid ActorGuid { get; private set; } = SerializableGuid.New();

        public bool IsInitialized { get; private set; }

        bool m_Simulate;
        public bool Simulate {
            get => m_Simulate;

            set {
                if (m_Simulate == value) {
                    return;
                }

                m_Simulate = value;

                if (!IsInitialized) {
                    return;
                }

                if (m_Simulate) {
                    OnBeginPlay();
                } else {
                    OnEndPlay();
                }
            }
        }

        async void Start() {
            IsInitialized = false;
            await InitAsync(destroyCancellationToken);
            IsInitialized = true;

            if (Simulate) {
                OnBeginPlay();
            }
        }

        void Update() {
            if (m_Simulate && IsInitialized) {
                OnTick();
            }
        }

        protected virtual async UniTask InitAsync(CancellationToken cancellationToken) {
            await UniTask.Yield(cancellationToken);
        }

        public virtual void OnBeginPlay() {
        }

        public virtual void OnEndPlay() {
        }

        public virtual void OnTick() {
        }
    }
}