using System;
using Cysharp.Threading.Tasks;
using UnityEngine;


namespace Unity.Startup.Procedure
{
    public enum UpdateProcedureState : byte
    {
        ProcedureEntryState,
        ProcedureGetAppVersionInfoState,
        ProcedureInitPackageState,
        ProcedureDownloadBundleState,
        ProcedurePatchDoneState,
        ProcedureLoadAssembly,
        ProcedureUpdateFinishState
    }

    public class Procedure : MonoBehaviour
    {
        private SimpleFSM<UpdateProcedureState> _fsm;

        private async UniTaskVoid Start()
        {
            await UniTask.WaitUntil(() => YooAsset.YooAssets.Initialized);
            _fsm = new SimpleFSM<UpdateProcedureState>();
            _fsm.Register<ProcedureEntryState>(UpdateProcedureState.ProcedureEntryState);
            _fsm.Register<ProcedureGetAppVersionInfoState>(UpdateProcedureState.ProcedureGetAppVersionInfoState);
            _fsm.Register<ProcedureInitPackageState>(UpdateProcedureState.ProcedureInitPackageState);
            _fsm.Register<ProcedureDownloadBundleState>(UpdateProcedureState.ProcedureDownloadBundleState);
            _fsm.Register<ProcedurePatchDoneState>(UpdateProcedureState.ProcedurePatchDoneState);
            _fsm.Register<ProcedureLoadAssembly>(UpdateProcedureState.ProcedureLoadAssembly);
            _fsm.Register<ProcedureUpdateFinishState>(UpdateProcedureState.ProcedureUpdateFinishState);
            _fsm.SwitchState(UpdateProcedureState.ProcedureEntryState);
        }

        private void Update()
        {
            _fsm.Update(Time.deltaTime);
        }

        private void OnDestroy()
        {
            _fsm.Dispose();
            _fsm = null;
        }
    }
}