namespace ChivaXR.VR
{
    using System.Collections.Generic;
    using UnityEngine;
    using Sirenix.OdinInspector;
    using System.Linq;
    using System;

    public struct CVR_SimulationEventArgs
    {
        public IVR_Interactable interactable_Base;
    }

    public enum ToolAxis
    {
        x,
        y,
        z
    }

    public delegate void CVRInteractableSimulationEventHandler(object sender, CVR_SimulationEventArgs e);

    [RequireComponent(typeof(IVR_Interactable))]
    /// <summary>
    /// 工具模拟基类
    /// </summary>
    public class CVR_SimulationTool : SerializedMonoBehaviour
    {
        private IVR_Interactable interactable;
        public IVR_Interactable Interactable
        {
            get
            {
                if (interactable == null)
                {
                    interactable = this.GetComponent<IVR_Interactable>();
                }
                return interactable;
            }
        }

        private bool useSimulationPoint = false;
        private bool simulationPointCreatInHandChild = true;
        public bool UseSimulationPoint { get => useSimulationPoint; set => useSimulationPoint = value; }
        /// <summary>
        /// 辅助模拟点是否创建在手部子级下
        /// </summary>
        public bool SimulationPointCreatInHandChild { get => simulationPointCreatInHandChild; set => simulationPointCreatInHandChild = value; }

        /// <summary>
        /// 模拟点生成位置
        /// </summary>
        public Transform simulationPointPlace;
        [HideInInspector]
        public CVR_SimulationPoint simulationPoint;
        [HideInInspector]
        public Transform recordGrabPointInHand;
        [HideInInspector]
        public GameObject currentGrabHand;


        [Header("工具模拟动画")]
        [TypeFilter("GetFilteredTypeList")]
        public CVR_SimulationAniBase SimulationAniDriverData;
        public IEnumerable<Type> GetFilteredTypeList()
        {
            var q = typeof(CVR_SimulationAniBase).Assembly.GetTypes()
                .Where(x => !x.IsAbstract)
                .Where(x => !x.IsGenericTypeDefinition)
                .Where(x => typeof(CVR_SimulationAniBase).IsAssignableFrom(x));
            return q;
        }

        [HideInInspector]
        public CVRInteractableSimulationEventHandler ExitSimulationMode;

        private List<MeshRenderer> childMeshRenderers;

        protected virtual void Start()
        {
            Init();
            if (simulationPointPlace != null)
            {
                UseSimulationPoint = true;
            }
        }

        private void Update()
        {
            if (interactable.CVR_IsGrabbed() && currentGrabHand != null && interactable.CVR_IsUsing())
            {
                UpdataSimulationAniDates();
            }
        }

        protected virtual void Init()
        {
            interactable = this.gameObject.GetComponent<IVR_Interactable>();
            interactable.CVR_InteractableObjectGrabbed += StartGrab;
            interactable.CVR_InteractableObjectUsed += StartUsing;
            interactable.CVR_InteractableObjectPreUnGrabbed += PreStopGrab;
            interactable.CVR_InteractableObjectUnused += StopUsed;

            if (SimulationAniDriverData != null)
                SimulationAniDriverData.Init(this);
        }
        protected virtual void StartGrab(object sender, CVR_InteractableObjectEventArgs e)
        {
            if (SimulationAniDriverData != null)
            {
                SimulationAniDriverData.CVR_Grab();
            }
            currentGrabHand = e.interactingObject;
        }
        protected virtual void PreStopGrab(object sender, CVR_InteractableObjectEventArgs e)
        {
            if (SimulationAniDriverData != null)
            {
                SimulationAniDriverData.CVR_UnGrab();
            }
            currentGrabHand = null;
        }

        protected virtual void StartUsing(object sender, CVR_InteractableObjectEventArgs e)
        {
            TriggerUsing();

            if (!UseSimulationPoint) return;
            CreatSimulationPoint();
        }
        protected virtual void StopUsed(object sender, CVR_InteractableObjectEventArgs e)
        {
            TriggerUnUsed();

            if (!UseSimulationPoint) return;
            CloseSimulationPoint();
        }

        /// <summary>
        /// 创建模拟操作点
        /// </summary>
        public void CreatSimulationPoint()
        {
            if (simulationPoint != null) return;

            if (recordGrabPointInHand == null)
            {
                recordGrabPointInHand = new GameObject(interactable.GetToolType().ToString()).transform;
            }
            recordGrabPointInHand.transform.parent = this.transform.parent;
            recordGrabPointInHand.transform.localPosition = this.transform.localPosition;
            recordGrabPointInHand.transform.localRotation = this.transform.localRotation;

            simulationPoint = CVR_ToolManager.Instance.CreatSimulationPoint(interactable.GetToolType());
            simulationPoint.transform.position = simulationPointPlace.transform.position;
            simulationPoint.transform.rotation = simulationPointPlace.transform.rotation;

            this.transform.parent = simulationPoint.transform;
            this.transform.localPosition = simulationPointPlace.InverseTransformPoint(this.transform.position);
            this.transform.localRotation = Quaternion.identity;

            if (SimulationPointCreatInHandChild)
            {
                simulationPoint.transform.parent = recordGrabPointInHand.transform;
            }
            simulationPoint.BindInteractable(this.interactable);

            if (SimulationAniDriverData != null)
            {
                SimulationAniDriverData.CVR_CreatSimulationPoint(simulationPoint);
            }
        }

        /// <summary>
        /// 关闭操作模拟点
        /// </summary>
        private void CloseSimulationPoint()
        {
            if (!this.gameObject.activeSelf) this.gameObject.SetActive(true);

            this.transform.SetParent(recordGrabPointInHand.transform.parent);
            this.transform.localPosition = recordGrabPointInHand.transform.localPosition;
            this.transform.localRotation = recordGrabPointInHand.transform.localRotation;

            OnCloseSimulation(new CVR_SimulationEventArgs { interactable_Base = this.interactable });

            CVR_ToolManager.Instance.ClearSimulationPoint(interactable.GetToolType(), simulationPoint);
            simulationPoint = null;
        }

        /// <summary>
        ///关闭模拟控制
        /// </summary>
        /// <param name="e"></param>
        public void OnCloseSimulation(CVR_SimulationEventArgs e)
        {
            if (ExitSimulationMode != null)
            {
                ExitSimulationMode(this, e);
            }
        }
        private void UpdataSimulationAniDates()
        {
            if (SimulationAniDriverData == null) return;
            //Trigger按键XValue值
            SimulationAniDriverData.CVR_TriggerXAxis_Value(interactable.CVR_GetControllerAxis(CVR_ButtonTypes.Trigger).x);

            if (UseSimulationPoint)
            {
                if (simulationPoint == null) CreatSimulationPoint();
                SimulationAniDriverData.CVR_UsingSimulationPointUpdate(simulationPoint);
            }
        }

        private void TriggerUsing()
        {
            if (SimulationAniDriverData != null)
            {
                SimulationAniDriverData.CVR_TriggerUsing();
            }

        }
        private void TriggerUnUsed()
        {
            if (SimulationAniDriverData != null)
            {
                SimulationAniDriverData.CVR_TriggerUnUsed();

                SimulationAniDriverData.CVR_TriggerXAxis_Value(0);
            }
        }
    }
}