using Gameplay.Area;
using Gameplay.Common;
using Gameplay.Unit;
using Gameplay.Unit.Data;
using LTGame;
namespace Gameplay.Summon
{
    public class BulletBoxStateIdle : BaseSummonState
    {

        public SummonBulletBox bulletBox;

        // 站在格子上的单位
        private GameUnit _standUnit;

        public BulletBoxStateIdle(SummonBulletBox bulletBox) : base(bulletBox, ESummonState.Idle)
        {
            this.bulletBox = bulletBox;
        }

        protected override void _OnEnter(NBaseState exitState,
            object param)
        {
            base._OnEnter(exitState, param);

            _standUnit = null;
        }

        protected override void _OnRunning()
        {
            base._OnRunning();

            var selfCellIndex = bulletBox.transData.cellIndex;
            if (_standUnit == null)
            {
                // 判断是否有单位站在格子上
                var units = AreaManager.instance.GetUnitsByCellIndex(selfCellIndex);
                for (int i = 0; i < units.Count; i++)
                {
                    var unit = units[i];
                    if (unit.commonData.troopId != bulletBox.commonData.troopId)
                    {
                        // 敌方不生效
                        continue;
                    }
                    if (unit.gameunitType != EGameUnitType.Character)
                    {
                        // 只对角色生效
                        continue;
                    }
                    _standUnit = unit;
                    break;
                }

                if (_standUnit != null)
                {
                    // 添加buff
                    _AddBuffToUnit();
                }
            }
            else
            {
                // 判断当前单位是否离开格子
                var targetCellIndex = _standUnit.transData.cellIndex;
                
                if (targetCellIndex != selfCellIndex)
                {
                    // 移除buff
                    _RemoveBuffFromUnit();
                    // 置空
                    _standUnit = null;
                }
            }
        }

        protected override void _OnExit(NBaseState exitState,
            object param)
        {
            base._OnExit(exitState, param);
            
            if (_standUnit != null)
            {
                // 移除buff
                _RemoveBuffFromUnit();
                // 置空
                _standUnit = null;
            }
        }

        private void _AddBuffToUnit()
        {
            for (int i = 0; i < bulletBox.buffIds.Count; i++)
            {
                var buffId = bulletBox.buffIds[i];
                _standUnit.buffManager.AddBuffById(buffId, owner);
            }
        }

        private void _RemoveBuffFromUnit()
        {
            for (var i = 0; i < bulletBox.buffIds.Count; ++i)
            {
                var buffId = bulletBox.buffIds[i];
                _standUnit.buffManager.RemoveBuffById(buffId);
            }
        }

    }
}