using Fantasy.Async;
using NBC;
using Fantasy.Entitas;
using Fantasy.Entitas.Interface;
using Fantasy.Event;
using UnityEngine;

namespace NBF.Fishing2
{
    public enum CameraShowMode
    {
        None = 0,
        FPP,
        TPP,
    }

    public class CameraComponent : Entity
    {
        public CameraShowMode Mode = CameraShowMode.None;

        private CameraAsset _cameraAsset;
        private CameraShowMode _lastMode = CameraShowMode.None;

        public class CameraComponentAwakeSystem : AwakeSystem<CameraComponent>
        {
            protected override void Awake(CameraComponent self)
            {
                self._cameraAsset = Game.Instance.gameObject.GetComponentInChildren<CameraAsset>();
            }
        }

        public class CameraComponentUpdateSystem : UpdateSystem<CameraComponent>
        {
            protected override void Update(CameraComponent self)
            {
                self.UpdateCamera();
            }
        }

        public class CameraComponentDestroySystem : DestroySystem<CameraComponent>
        {
            protected override void Destroy(CameraComponent self)
            {
                self._cameraAsset = null;
                self._lastMode = CameraShowMode.None;
                self.Mode = CameraShowMode.None;
            }
        }
        

        private void UpdateCamera()
        {
            if (_lastMode == Mode) return;
            if (Mode == CameraShowMode.TPP)
            {
                //第三人称视角
                SetTPPCam();
            }
            else if (Mode == CameraShowMode.FPP)
            {
                //第一人称视角
                SetFPPCam();
            }
        }


        private void SetTPPCam()
        {
            _cameraAsset.fppVCam.Priority = 0;
            _cameraAsset.tppVCam.Priority = 10;
        }

        private void SetFPPCam()
        {
            var map = App.Main.GetComponent<Map>();
            var unityComponent = map.SelfMapUnit.GetComponent<UnitUnityComponent>();
            if (unityComponent != null)
            {
                _cameraAsset.fppVCam.LookAt = unityComponent.RootAsset.FppLook;
                _cameraAsset.fppVCam.Follow = unityComponent.ModelAsset.NeckTransform;
                unityComponent.ModelAsset.LookIk.solver.target = unityComponent.RootAsset.FppLook;
            }

            _cameraAsset.fppVCam.Priority = 10;
            _cameraAsset.tppVCam.Priority = 0;
        }

        public void SetFppLook(Transform fppCamLook)
        {
            _cameraAsset.fppVCam.LookAt = fppCamLook;
        }

        public void SetFppFollow(Transform fppCamFollow)
        {
            _cameraAsset.fppVCam.Follow = fppCamFollow;
        }
    }
}