extends ActionLeaf
#执行成功后是否抹除黑板目标数据
@export var should_erase_target_id:bool=false

#用于移动到特定单位的可交互范围内
func tick(actor:Node,black_board:Blackboard):
	var unit:Unit=actor
	if black_board.has_value("target_unit_id"):
		var target_id:String=black_board.get_value("target_unit_id")
		if Global.get_unit_instance(target_id)==null:
			#移除目标
			black_board.erase_value("target_unit_id")
			return FAILURE
		#获取要移动到的目标实例
		var target_instance:Unit=Global.get_unit_instance(target_id)
		
		if not unit.is_unit_instance_in_attack_area(target_instance):
			unit.set_target_pos(target_instance.global_position)
			match unit.get_dir():
				0:
					unit.play_animation("up")
				1:
					unit.play_animation("down")
				2:
					unit.play_animation("left_right")
				3:
					unit.play_animation("left_right")
			return RUNNING
		else:
			unit.stop_move()
			if should_erase_target_id:
				black_board.erase_value("target_unit_id")
			match unit.get_dir():
				0:
					unit.play_animation("up_idle")
				1:
					unit.play_animation("down_idle")
				2:
					unit.play_animation("left_right_idle")
				3:
					unit.play_animation("left_right_idle")
			return SUCCESS
	else:
		black_board.erase_value("target_unit_id")
		match unit.get_dir():
			0:
				unit.play_animation("up_idle")
			1:
				unit.play_animation("down_idle")
			2:
				unit.play_animation("left_right_idle")
			3:
				unit.play_animation("left_right_idle")
		return FAILURE