using System.Collections.Generic;
using Opsive.BehaviorDesigner.Runtime;
using UnityEngine;
using UnityEngine.AI;
using UniRx;
using Cielonos.MainGame.Buffs.Character;

namespace Cielonos.MainGame.Characters
{
    public class BehaviorSubcontroller : SubcontrollerBase<Automata>
    {
        public Automata Automata => owner;

        public BehaviorTree mainBehaviorTree;
        public NavMeshAgent navMeshAgent;
        public Dictionary<string, Subtree> subBehaviorTrees;
        
        private System.IDisposable timeScaleDisposable;
        private bool isTimePaused = false;

        public override void Initialize()
        {
            base.Initialize();
            owner.selfTimeSm.timeScaleObservable.Subscribe(OnTimeScaleChanged).AddTo(owner);
        }

        private void OnTimeScaleChanged(float timeScale)
        {
            if (mainBehaviorTree == null) return;

            if (timeScale == 0f)
            {
                if (!isTimePaused)
                {
                    isTimePaused = true;
                    mainBehaviorTree.StopBehavior(true);
                }
            }
            else
            {
                if (isTimePaused)
                {
                    isTimePaused = false;
                    mainBehaviorTree.StartBehavior();
                }
            }
        }
        
        public class AutomataEvent
        {
            public float Timestamp;
            public object Arg1;
            public object Arg2;
            public object Arg3;
            
            public bool IsValid(float expireTime)
            {
                return Time.time - Timestamp <= expireTime;
            }
        }
        
        // 以事件名称作为键值存储
        public readonly Dictionary<string, AutomataEvent> EventMemory = new Dictionary<string, AutomataEvent>();
        /// <summary>
        /// 向自身的 AI 下达上下文事件通知（代替原生的 ExecuteEvent）
        /// </summary>
        public void DispatchContextEvent(string eventName, object arg1 = null, object arg2 = null, object arg3 = null)
        {
            if (!EventMemory.TryGetValue(eventName, out AutomataEvent e))
            {
                e = new AutomataEvent();
                EventMemory[eventName] = e;
            }
            // 更新该事件发生的最绝对新时间与参数
            e.Timestamp = Time.time;
            e.Arg1 = arg1;
            e.Arg2 = arg2;
            e.Arg3 = arg3;
        }
    }
}