using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using BITKit;
using BITKit.Animations;
using BITKit.StateMachine;
using System.Linq;
using System.Security.Permissions;
using Animancer;
using AYellowpaper.SerializedCollections;
using BITFALL;
using BITFALL.Entities.Equipment;
using BITFALL.Entities.Inventory;
using BITFALL.Guns.Modify;
using BITFALL.Player.Equip;
using BITFALL.Props;
using BITKit.Entities.Melee;
using BITKit.Entities.VFX;
using BITKit.UX;
using Cinemachine;
using Cysharp.Threading.Tasks;
using Unity.Mathematics;

namespace BITKit.Entities
{
    
    public abstract class BITEquipBase<T> : StateBasedMonoBehaviour<T>, IEquipBase where T : IState
    {
        public const string C_Weapon = "c_weapon";
        
        public string[] SearchKey { get; set; }
        
        [Header(Constant.Header.Settings)]
        [SerializeField] protected ScriptableItem item;
    
        
        //[Header(Constant.Header.Property)]
        //[SerializeField] public SerializedDictionary<string,AnimationProperty> animationProperties;

        [Header(Constant.Header.Components)]
        [SerializeField] private AnimancerComponent animancerComponent;
        [SerializeField] private AnimancerComponent additionalAnimancerComponent;
        [SerializeField] protected EntityVFXPlayer vfxPlayer;
        [SerializeField] private Renderer[] renderers;
        [SerializeField] protected Transform cameraTransform;
        [SerializeField] protected Prop_Modify _modify;
        [Header(Constant.Header.Services)]
        [SerializeReference,SubclassSelector] protected IMeleeService meleeService;

        [Inject] private IMotionMatchingService motionMatchingService = new ScriptableMotionMatchingSingleton();
        
        public IEntity Entity { get; set; }
        public Entity UnityEntity=>Entity as Entity;
        public AnimancerComponent AnimancerComponent=>animancerComponent;
        public AnimancerComponent AdditionalAnimancerComponent=>additionalAnimancerComponent;
        public IMotionMatchingService MotionMatchingService=>motionMatchingService;
        
        public IBasicItem Item
        {
            get => _item;
            set
            {
                OnApply?.Invoke(_item = value);
                OnItemApplied(value);
            }
        }
        public ScriptableItem ScriptableItem => item;
        private IBasicItem _item;
        //public IDictionary<string, float> AnimationProperties = null;
    
        [Inject(true),NonSerialized]
        public InputActionGroup inputActionGroup;
        protected readonly ValidHandle AllowRendering = new();
        public virtual string AddressablePath => item.AddressablePath;
        protected virtual Vector3 meleeForce => Transform.forward;
        public bool IsEntered { get; set; }
        private Quaternion _initialCameraRotation;
        
        protected event Action<IBasicItem> OnApply;

        [Inject] protected IEntityOverride _entityOverride;
        [Inject(true)] protected IEntityInventory _inventory;
        [Inject(true)] protected IUXPopup _uxPopup;

        public IEntityInventory Inventory=>_inventory;
        public IUXPopup UXPopup=>_uxPopup;
        public override void Initialize()
        {
            SearchKey = new []{C_Weapon,item.Name};
            base.Initialize();
        }

        public virtual void Entry()
        {
            if (animancerComponent)
            {
                animancerComponent.enabled = true;
                animancerComponent.Animator.enabled = true;
            }
                if (additionalAnimancerComponent)
                {
                    additionalAnimancerComponent.enabled = true;
                    additionalAnimancerComponent.Animator.enabled = true;
                }

            AllowRendering.AddElement(this);
            //inputActionGroup.allowInput.AddElement(this);

            if (vfxPlayer)
                vfxPlayer.enabled = true;
        }

        public virtual UniTask EntryAsync()
        {
            return UniTask.CompletedTask;
        }

        public virtual void Entered()
        {
        }

        public virtual void Exit()
        {
            if (vfxPlayer)
                vfxPlayer.enabled = false;
        }

        public virtual async UniTask ExitAsync()
        {
            while (AnimancerComponent && AnimancerComponent.IsPlaying())
            {
                await UniTask.NextFrame();
                if (destroyCancellationToken.IsCancellationRequested) return;
            }
        }

        public virtual async void Exited()
        {
            AllowRendering.RemoveElement(this);
            if (cameraTransform)
            {
                cameraTransform.localPosition = default;
                cameraTransform.localRotation = _initialCameraRotation;
            }
            await UniTask.NextFrame(destroyCancellationToken);
         

            if (animancerComponent)
            {
                animancerComponent.enabled = false;
                animancerComponent.Animator.enabled = false;
            }
            if(AdditionalAnimancerComponent)
            {
                AdditionalAnimancerComponent.enabled = false;
                AdditionalAnimancerComponent.Stop();
                AdditionalAnimancerComponent.Animator.enabled = false;
            }
        }

        public virtual void OnAwake()
        {
            //AnimationProperties= animationProperties.ToDictionary(x=>x.Key,x=>x.Value.Value);

            if (renderers is null or { Length: 0 })
            {
                renderers = GetComponentsInChildren<Renderer>(true);
            }

            foreach (var x in StateDictionary.Values)
            {
                Entity.Inject(x);
            }
            
            AllowRendering.AddListener(x =>
            {
                renderers.ForEach(y => { y.enabled = x; });
                if (_modify)
                    _modify.AllowModify.SetDisableElements(this, !x);
            });
            if (animancerComponent)
            {
                animancerComponent.Animator.enabled = false;
                animancerComponent.enabled = false;
            }
               
            AllowRendering.Invoke();
            if (cameraTransform)
                _initialCameraRotation = cameraTransform.localRotation;
            Initialize();

            inputActionGroup?.allowInput.Invoke();

            if (vfxPlayer)
                vfxPlayer.enabled = false;

            _entityOverride.OnOverride += OnOverride;

            OnApply += (x) =>
            {
                if (!_modify) return;
                if (x is not null && x.TryGetProperty<GunModify>(out var modify))
                {
                    _modify.Modify(modify);
                }
                else
                {
                    _modify.ClearModify();
                }
            };
            if (_modify)
                _modify.ClearModify();
        }

        private void OnOverride(bool obj)
        {
            if (inputActionGroup is not null)
                inputActionGroup.allowInput.SetDisableElements("Override", obj);
            AllowRendering.SetDisableElements("Override", obj);
        }

        public virtual void OnDestroy()
        {
            inputActionGroup?.Dispose();
        }

        public virtual void OnStart() { }

        public virtual void OnUpdate(float deltaTime)
        {
            // foreach (var pair in animationProperties)
            // {
            //     AnimationProperties[pair.Key] = pair.Value.Value;
            // }
        }
        public virtual bool IsSupportItem(IBasicItem item) =>item is not null && item.AddressablePath == AddressablePath;

        public virtual void PlayAudio(string eventName) { }
        public virtual void EquipEvent(string eventName){}
        public virtual void AnimationEvent(string eventName)
        {
            if (IsEntered is false) return;
            if (item is not ScriptableEquip equip) return;
            UnityEntity.Invoke(Constant.Animation.OnEvent, eventName);
            switch (eventName)
            {
                case "Melee":
                case "Attack":
                    meleeService.Melee(new MeleeCommand
                    {
                        
                        PlayerId = Entity.Id,
                        Position = Transform.position,
                        Force = meleeForce * equip.MeleeForce,
                        Range = equip.MeleeRange,
                        Damage = equip.MeleeDamage,
                        Forward = UnityEntity.transform.forward
                    });
                    break;
                case "HeavyAttack":
                    meleeService.Melee(new MeleeCommand
                    {
                        PlayerId = Entity.Id,
                        Position = Transform.position,
                        Force = meleeForce * equip.HeavyMeleeForce,
                        Range = equip.HeavyMeleeRange,
                        Damage = equip.HeavyMeleeDamage,
                        Forward = UnityEntity.transform.forward
                    });
                    break;
            }
        }
        protected virtual void OnItemApplied(IBasicItem item)
        {
            
        }
    }
    [CustomType(typeof(IEquipService))]
    [CustomType(typeof(IEntityEquipment))]
    public class EntityEquipment : EntityBehavior,IEquipService,IEntityEquipment
    {
        public IOptional<float> Zoom { get; } = new Optional<float>(){Value = 1};
        [SerializeField] protected Optional<int> allowAnimationFOV;
        
        [SerializeField] private int layer;
        public float Stable { get; set; }
        public float Aim { get; set; }
        public bool AllowAttack { get; set; }
        public bool AllowScope { get; set; }

        [SerializeField] private CinemachineVirtualCamera virtualCamera;

        [SerializeField] private Optional<int> overrideIndex;
        
        [SerializeField] private Optional<GameObject> optionalScope;

        public IBasicItem CurrentItem { get; private set; }

        public event Action<IBasicItem> OnEquip;
        public event Action<IBasicItem> OnUnEquip;
        public event Action<string> OnEquipAddressable;
        public event Action<string> OnUnEquipAddressable;

        private readonly EntryGroup<IEquipBase> equips = new();
        protected IEquipBase entryComplete;

        [Inject(true)] private IHealth _health;
        [Inject(true)] private IEntityOverride _entityOverride;
        public IValidHandle AllowEquip { get; } =new ValidHandle();
        
        private readonly PrioritySelector<int> _prioritySelector = new();
        public override void OnAwake()
        {
            base.OnAwake();

            foreach (var x in  GetComponentsInChildren<IEquipBase>(true))
            {
                Register(x);
            }
            
            
            equips.OnEntry += OnEntry;
            equips.OnExit += OnExit;
            
            AllowEquip.AddListener(OnAllowEquip);
            
            if (_health is not null)
            {
                _health.OnSetAlive += x =>
                {
                    AllowEquip.SetElements(this,x);
                    if (x is false)
                    {
                        CurrentItem = null;
                        EntryEquip(-1);
                    }
                };
            }
            
        }
        private void OnAllowEquip(bool allow)
        {
            if (allow)
            {
                EntryEquip(CurrentItem);
            }
            else
            {
                EntryEquip(-1);
            }
        }
        public override void OnStart()
        {
            base.OnStart();
            foreach (var x in equips.list)
            {
                x.OnStart();
            }
            if (overrideIndex.Allow && (_health?.IsAlive ?? true))
            {
                EntryEquip(overrideIndex.Value);
            }
        }
        private void OnExit(IEquipBase obj)
        {
            OnUnEquipAddressable?.Invoke(obj.AddressablePath);
            OnUnEquip?.Invoke(obj.Item);
            //Debug.Log($"已退出:{obj.Item.Name}");
        }

        private void OnEntry(IEquipBase obj)
        {
            OnEquipAddressable?.Invoke(obj.AddressablePath);
            obj.Item = CurrentItem;
            OnEquip?.Invoke(obj.Item);
            //Debug.Log($"已进入:{obj.Item.Name}");
        }

        public override void OnUpdate(float deltaTime)
        {
            equips.Entry(_prioritySelector.Current);
            if (equips.index is not -1)
            {
                //equips.list[equips.index].Item = CurrentItem;
            }
            if (equips.TryGetEntried(out entryComplete))
            {
                entryComplete.OnUpdate(deltaTime);
            }

            if (virtualCamera is not null)
            {
                var targetFov  =
                    Mathf.Lerp(
                        virtualCamera.m_Lens.FieldOfView,
                        Zoom.Allow ?
                        Mathf.Rad2Deg * CalcZoomFOV(Mathf.Deg2Rad * 60f, Zoom.Value) : PlayerConfig.Singleton.Fov,
                        16*deltaTime
                    );

                if (_entityOverride is {IsOvering:true} && allowAnimationFOV.Allow)
                {
                    virtualCamera.m_Lens.FieldOfView = 
                        Mathf.Lerp(virtualCamera.m_Lens.FieldOfView,allowAnimationFOV.Value,5*deltaTime);
                }
                else
                {
                    virtualCamera.m_Lens.FieldOfView = Mathf.Lerp(PlayerConfig.Singleton.Fov, targetFov, Aim);
                }
             
                float CalcZoomFOV(float baseFOV, float zoom)
                {
                    return 2.0f * Mathf.Atan(Mathf.Tan(baseFOV / 2.0f) / zoom);
                }
            }

            if (optionalScope.Allow)
            {
                optionalScope.Value.SetActive(AllowScope);
            }

          
        }

        public int FindIndex(Func<string, bool> factory)
        {
            return equips.list.FindIndex(x => factory.Invoke(x.AddressablePath));
        }

        public bool IsSupportItem(IBasicItem item)=> equips.list.Any(x => x.IsSupportItem(item));
        //public void EntryEquip(int index)=> equips.Entry(index);
        public void EntryEquip(int index) => _prioritySelector.Set(0, index);

        public void EntryEquip(IBasicItem item)
        {
            CurrentItem = item;
            //equips.Entry(x=>x.IsSupportItem(item));
            // if (equips.list.TryGetAny(x => x.IsSupportItem(item), out var nextEquip))
            // {
            //     nextEquip.Item = item;
            // }
            var index = equips.list.FindIndex(x => x.IsSupportItem(item));
            _prioritySelector.Set(0, index);
        }

        public void SetEquipPriority(int priority, IBasicItem item)
        {
            var index = equips.list.FindIndex(x => x.IsSupportItem(item));
            _prioritySelector.Set(priority, index);
        }

        public void SetEquipPriority(int priority, int index)
        {
            _prioritySelector.Set(priority, index);
        }

        public void RemoveEquipPriority(int priority)
        {
            _prioritySelector.Remove(priority);
        }

        public void Register(IEquipBase equipBase)
        {
            equips.list.Add(equipBase);
            Entity.Inject(equipBase);
            equipBase.Entity = Entity;
            equipBase.OnAwake();

            foreach (var x in equipBase.As<MonoBehaviour>().GetComponentsInChildren<Transform>())
            {
                x.gameObject.layer = layer;
            }
            foreach (var x in equipBase.As<MonoBehaviour>().GetComponentsInChildren<Renderer>())
            {
                if (x is SkinnedMeshRenderer skinnedMeshRenderer)
                {
                    skinnedMeshRenderer.updateWhenOffscreen = true;
                }
                x.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
            }
        }

        public void UnRegister(IEquipBase equipBase)
        {
            equips.list.Remove(equipBase);
        }
    }
}