using System.Collections.Generic;
using UnityEngine;
using System.Linq;
using System.Net.Configuration;
using BITKit.Animations;

namespace BITKit.Entities
{
    [ExecuteInEditMode]
    public sealed class EntityAnimator : EntityBehavior
    {
        [SerializeField] private bool debug;
        [SerializeField] private UnityAnimator[] animators;
        [SerializeReference, SubclassSelector] private References[] animationKeyWords;
        [SerializeReference, SubclassSelector] private References _rootVelocity;
        [SerializeReference, SubclassSelector] private References[] boolParameters;
        [SerializeReference, SubclassSelector] private References[] floatParameters;
        private List<string> keyWords;
        
        private ConstantHash[] _boolParameterHashes;
        private ConstantHash[] _floatParameterHashes;
        public override void OnAwake()
        {
            keyWords = animationKeyWords.Select(x => x.Get()).ToList();
            
            _boolParameterHashes = boolParameters.Select(x =>new ConstantHash(x.Get())).ToArray();
            _floatParameterHashes = floatParameters.Select(x =>new ConstantHash(x.Get())).ToArray();
        }
        public override void OnStart()
        {
            UnityEntity.AddListener<string>(Constant.Animation.Play, Play);
        }

        private void Play(string animationName)
        {
            if (enabled is false) return;

            if (animationKeyWords.Length is 0 || keyWords.Contains(animationName))
            {
                if (debug)
                    BIT4Log.Log<EntityAnimator>($"{gameObject.name} playing {animationName}");
                animators.ForEach(x =>
                {
                    if (!x.isActiveAndEnabled) return;
                    x.Play(animationName);
                });
                return;
            }

            if (debug)
                BIT4Log.Log<EntityAnimator>($"{gameObject.name} cancel play {animationName}");
        }

        public override void OnFixedUpdate(float deltaTime)
        {
            bool cacheBool;
            float cacheFloat;
            foreach (var boolPar in _boolParameterHashes)
            {
                foreach (var x in animators)
                {
                    if (!x.isActiveAndEnabled) return;
                    UnityEntity.GetDirect<bool>(boolPar, out cacheBool);
                    x.animator.SetBool(boolPar.HashCode, cacheBool);
                }
            }
            foreach (var floatPar in _floatParameterHashes)
            {
                foreach (var x in animators)
                {
                    if (!x.isActiveAndEnabled) return;
                    UnityEntity.GetDirect<float>(floatPar, out cacheFloat);
                    x.animator.SetFloat(floatPar.HashCode, cacheFloat);
                }
            }
        }
        private void OnAnimatorMove()
        {
            if (enabled is false) return;

            if (BITAppForUnity.IsPlaying is false)
            {
                foreach (var x in animators)
                {
                    x.animator.ApplyBuiltinRootMotion();
                }
                return;
            }
            
            if (_rootVelocity is not null && UnityEntity is not null)
                UnityEntity.Set(_rootVelocity, animators[0].animator.velocity);
        }

        // ReSharper disable once UnusedMember.Local
        private void AnimationEvent(string eventName)
        {
            UnityEntity.Invoke(Constant.Animation.OnEvent, eventName);
        }
    }
}