using System;

namespace AibisDream.Kit
{
    public class Condition : IAction
    {
        private Func<bool> _condition;

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

        private Condition()
        {
        }

        public static Condition Allocate(Func<bool> condition)
        {
            var conditionAction = SimpleObjectPool.Allocate();
            conditionAction.ActionID = ActionKit.IDGenerator++;
            conditionAction.IsFinalized = false;
            conditionAction.Reset();
            conditionAction._condition = condition;
            return conditionAction;
        }

        public bool Paused { get; set; }
        public bool IsFinalized { get; set; }
        public ulong ActionID { get; set; }
        public ActionStatus Status { get; set; }

        public void OnStart()
        {
        }

        public void OnExecute(float dt)
        {
            if (_condition.Invoke())
            {
                this.Finish();
            }
        }

        public void OnFinish()
        {
        }

        public void Deinit()
        {
            if (!IsFinalized)
            {
                IsFinalized = true;
                _condition = null;
                ActionKitMonoBehaviourEvents.AddCallback(
                    new ActionQueueRecycleCallback<Condition>(SimpleObjectPool, this));
            }
        }

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

    public static class ConditionExtension
    {
        public static ISequence Condition(this ISequence self, Func<bool> condition)
        {
            return self.Append(Kit.Condition.Allocate(condition));
        }
    }
}