extends ActionLeaf

#执行成功后是否抹除黑板目标数据
@export var should_erase_target: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"):
		var target=black_board.get_value("target")
		if not is_instance_valid(target) or not target is Node2D:
			black_board.erase_value("target")
			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")
			unit.stop_move()
			return FAILURE
		#获取要移动到的目标
		if unit.is_unit_instance_in_touch_area(target):
			if should_erase_target:
				black_board.erase_value("target")
			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")
			unit.stop_move()
			return SUCCESS
		unit.set_target_pos(target.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:
		black_board.erase_value("target")
		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")
		unit.stop_move()
		return FAILURE