using BehaviorDesigner.Runtime.Tasks;
using Gameplay.BT.Variables;
using Gameplay.Character;
using Gameplay.Level;
using Gameplay.Unit;
using Gameplay.AI;
using Framework;

namespace Code.Scripts.Gameplay.BT.Conditional
{
    /// <summary>
    /// 是否受到攻击 不需要判断是否为同一目标 需要一直后退
    /// </summary>
    public class BTBeingAttacked : BehaviorDesigner.Runtime.Tasks.Conditional
    {
        public SharedBattleInfo SharedBattleInfo;
        private bool _isBeingAttacked;
        private bool _isRegistered;
        private GameUnit _owner;
        private GameUnit _target;

        public override void OnStart()
        {
            if (!_isRegistered)
            {
                EventManager.Instance.Register<EventDataGetDamaged>(EventManager.EventName.INFIGHT_GET_DAMAGED_FOR_AI, OnDamaged);
                _isRegistered = true;
                _isBeingAttacked = false;
            }

            _owner = GameUnitManager.instance.infightUnits.Search(SharedBattleInfo.Value.ownerId);
        }

        private void OnDamaged(EventDataGetDamaged data)
        {
            //data.sender 发送受伤的角色 data.owner 受到伤害的角色
            if (data.owner.GetID() == _owner.GetID())
            {
                _isBeingAttacked = true;
                _owner.statusData.isAttackActive = true;
                if (data.sender != null)
                {
                    // 如果收到多个攻击 选择最近的攻击目标
                    _target = _target != null
                        ? _target = AIUtils.GetNearestGameUnit(data.owner, data.sender, _target)
                        : _target = data.sender;
                    _target = AIUtils.GetNearestGameUnit(data.owner, data.sender, _target);
                    SharedBattleInfo.Value.theChosenOneId = _target.GetID();
                    // DebugUtil.LogG($"BT harmed by: {data.sender?.GetID()} ,But Target is ：{_target.GetID()}, owner: {_owner?.GetID()}");
                }
            }
        }

        public override TaskStatus OnUpdate()
        {
            AIUtils.ActiveAIAttack(_owner);
            // _owner.controlData.targetEnemy 外部判断
            if (SharedBattleInfo.Value.AIName == LevelData.AIType.FallBackIntensifyAI)
            {
                // 被攻击但攻击对象不在视野内
                if (_isBeingAttacked && _owner.controlData.targetEnemy == null)
                {
                    _isBeingAttacked = false;
                    return TaskStatus.Success;
                }

                // 被攻击但敌人在攻击范围内
                if (_isBeingAttacked && _owner.controlData.targetEnemy != null)
                {
                    _isBeingAttacked = false;
                    return TaskStatus.Running;
                }
            }

            if (_isBeingAttacked && SharedBattleInfo.Value.AIName == LevelData.AIType.FallBackAI)
            {
                if (SharedBattleInfo.Value.theChosenOneId != Constants.INVALID_UINT_ID)
                {
                    _isBeingAttacked = false;
                    return TaskStatus.Success;
                }
            }

            return TaskStatus.Running;
        }

        public override void OnEnd()
        {
            if (_isBeingAttacked)
            {
                EventManager.Instance.Unregister<EventDataGetDamaged>(EventManager.EventName.INFIGHT_GET_DAMAGED_FOR_AI, OnDamaged);
                _isRegistered = false;
            }

            _isBeingAttacked = false;
        }

        public override void OnBehaviorComplete()
        {
            EventManager.Instance.Unregister<EventDataGetDamaged>(EventManager.EventName.INFIGHT_GET_DAMAGED_FOR_AI, OnDamaged);
            _isBeingAttacked = false;
            _isRegistered = false;
        }
    }
}