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

namespace Code.Scripts.Gameplay.BT.Conditional
{
    public class BTWithinSight : BehaviorDesigner.Runtime.Tasks.Conditional
    {
        public SharedBattleInfo SharedBattleInfo;
        public bool _isBeingAttacked;
        private bool _isRegistered;
        private GameUnit _owner;
        private Level _level;
        private GameUnit _target;

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

            _level = LevelManager.Instance.CurrentLevel;
            _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;
                if (data.sender != null)
                {
                    SharedBattleInfo.Value.theChosenOneId = data.sender.GetID();
                    _target = data.sender;
                    DebugUtil.LogG($"BT harmed by: {data.sender?.GetID()} , owner: {_owner?.GetID()}");
                }
            }
        }

        public override TaskStatus OnUpdate()
        {
            if (_isBeingAttacked && SharedBattleInfo.Value.theChosenOneId!= Constants.INVALID_UINT_ID)
            {
                return TaskStatus.Success;
            }
            if (_owner != null && _level != null
                               && _owner.controlData.followUnit == null
                               && _owner.controlData.targetEnemy == null)
            {
                var enemy = AIUtils.FindNearestEnemyInSightDistance(_owner);
                if (enemy != null)
                {
                    SharedBattleInfo.Value.theChosenOneId = enemy.GetID();
                    return TaskStatus.Success;
                }
                else
                {
                    return TaskStatus.Failure;
                }
            }
            else if (_owner != null && _level != null
                                    && (_owner.controlData.followUnit != null ||
                                        _owner.controlData.targetEnemy != null))
            {
                if (_owner.controlData.targetEnemy != null)
                {
                    SharedBattleInfo.Value.theChosenOneId = _owner.controlData.targetEnemy.GetID();
                    return TaskStatus.Success;
                }

                if (_owner.controlData.followUnit != null)
                {
                    SharedBattleInfo.Value.theChosenOneId = _owner.controlData.followUnit.GetID();
                    return TaskStatus.Success;
                }
            }
            return TaskStatus.Running;
        }

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

            _isBeingAttacked = false;
        }

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