using System;
using System.Collections;
using Sirenix.OdinInspector;
using Spine;
using Spine.Unity;
using UnityEngine;
using AnimationState = Spine.AnimationState;

namespace BlueWater.Players
{
    public class SpineController : MonoBehaviour
    {
        // Variables
        #region Variables
        // Components
        [SerializeField]
        private SkeletonAnimation _skeletonAnimation;
        private AnimationState _animationState;
        
        // Variables
        [SerializeField]
        private string _initialSkinName = "default";
        
        #endregion

        // Unity events
        #region Unity events

        private void Awake()
        {
            InitializeComponents();
        }

        #endregion
        
        // Initialize methods
        #region Initialize methods
        
        [Button("셋팅 초기화")]
        public virtual void InitializeComponents()
        {
            _skeletonAnimation = transform.GetComponentInChildren<SkeletonAnimation>();
            _animationState = _skeletonAnimation.AnimationState;
            SetSkin(_initialSkinName);
        }
        
        #endregion

        // Methods
        #region Methods
        
        /// <param name="animationName">스파인 애니메이션 이름</param>
        /// <param name="isLoopActive">반복 여부</param>
        /// <param name="speed">애니메이션 속도 양수값</param>
        /// <param name="isReverse">true인 경우 자동으로 speed에 음수값을 넣음</param>
        /// <returns></returns>
        public TrackEntry PlayAnimation(string animationName, bool isLoopActive, float speed = 1f, bool isReverse = false)
        {
            if (!_skeletonAnimation || _animationState == null) return null;

            if (string.IsNullOrEmpty(animationName))
            {
                Debug.LogError($"{animationName}의 애니메이션은 존재하지 않습니다.");
                return null;
            }

            _animationState.TimeScale = isReverse ? -Mathf.Abs(speed) : Mathf.Abs(speed);
            var trackEntry = _animationState.SetAnimation(0, animationName, isLoopActive);
        
            if (isReverse)
            {
                trackEntry.TrackTime = trackEntry.AnimationEnd;
            }

            return trackEntry;
        }

        public void SetSkin(string skinName)
        {
            if (_skeletonAnimation == null && _animationState == null) return;
            
            if (string.IsNullOrEmpty(skinName))
            {
                Debug.LogError($"{skinName}의 스킨 이름은 존재하지 않습니다.");
                return;
            }
            
            _skeletonAnimation.Skeleton.SetSkin(skinName);
            _skeletonAnimation.Skeleton.SetSlotsToSetupPose();
            _animationState.Apply(_skeletonAnimation.Skeleton);
        }
        
        public async Awaitable WaitForAnimationCompletion(TrackEntry trackEntry, bool isReverse = false)
        {
            if (isReverse)
            {
                await AwaitUntil(() => trackEntry.TrackTime <= 0);
            }
            else
            {
                await AwaitUntil(() => trackEntry.IsComplete);
            }
        }
        
        public async Awaitable AwaitUntil(Func<bool> condition)
        {
            while (!condition())
            {
                await Awaitable.NextFrameAsync();
            }
        }
        
        #endregion
    }
}