using System;
using System.Diagnostics;
using Debug = UnityEngine.Debug;

namespace AibisDream.Kit
{
    internal class Delay : IAction
    {
        public float delayTime;

        public Func<float> delayTimeFactory;

        public Action OnDelayFinish { get; set; }

        public float CurrentSeconds { get; set; }

        private Delay()
        {
        }

        private static readonly SimpleObjectPool<Delay> Pool = new(() => new Delay(), null, 10);

        public static Delay Allocate(float delayTime, Action onDelayFinish = null)
        {
            var retNode = Pool.Allocate();
            retNode.ActionID = ActionKit.IDGenerator++;
            retNode.IsFinalized = false;
            retNode.Reset();
            retNode.delayTime = delayTime;
            retNode.OnDelayFinish = onDelayFinish;
            retNode.CurrentSeconds = 0.0f;
            return retNode;
        }

        public static Delay Allocate(Func<float> delayTimeFactory, Action onDelayFinish = null)
        {
            var retNode = Pool.Allocate();
            retNode.IsFinalized = false;
            retNode.Reset();
            retNode.delayTimeFactory = delayTimeFactory;
            retNode.OnDelayFinish = onDelayFinish;
            retNode.CurrentSeconds = 0.0f;
            return retNode;
        }


        public ulong ActionID { get; set; }
        public ActionStatus Status { get; set; }

        public void OnStart()
        {
            if (delayTimeFactory != null)
            {
                delayTime = delayTimeFactory();
            }
        }

        public void OnExecute(float dt)
        {
            if (CurrentSeconds >= delayTime)
            {
                this.Finish();
                OnDelayFinish?.Invoke();
            }

            CurrentSeconds += dt;
        }

        public void OnFinish()
        {
        }

        public void Reset()
        {
            Status = ActionStatus.NotStart;
            Paused = false;
            CurrentSeconds = 0.0f;
        }

        public bool Paused { get; set; }

        public void Deinit()
        {
            if (!IsFinalized)
            {
                OnDelayFinish = null;
                IsFinalized = true;
                ActionKitMonoBehaviourEvents.AddCallback(new ActionQueueRecycleCallback<Delay>(Pool, this));
            }
        }

        public bool IsFinalized { get; set; }
    }

    public static class DelayExtension
    {
        public static ISequence Delay(this ISequence self, float seconds, Action onDelayFinish = null)
        {
            return self.Append(Kit.Delay.Allocate(seconds, onDelayFinish));
        }

        public static ISequence Delay(this ISequence self, Func<float> delayTimeFactory, Action onDelayFinish = null)
        {
            return self.Append(Kit.Delay.Allocate(delayTimeFactory, onDelayFinish));
        }
    }
}