from abc import ABCMeta, abstractmethod


class HouseOwner(metaclass=ABCMeta):
  """房主抽象類：都可以將房子出租"""
  @abstractmethod
  def rent_house(self, rental):
    pass


class Landlord(HouseOwner):
  """真實(shí)對象：房主"""
  def __init__(self):
    self.account = 0
    self.house_key = 'house key'

  def rent_house(self, rental):
    """收取租金，并房屋鑰匙給出租的人"""
    self.account += rental
    return self.house_key


class HouseAgent:
  """代理類：中介，代理房東出租他們的房子"""
  def __init__(self):
    self.account = 0
    self.house_resource = []
    # 房源肯定不只一個(gè)，這里就只簡單放一個(gè)了
    self.house_resource.append(Landlord())

  # 通常而言，代理類和表示真實(shí)對象的類具有相同的接口
  # 表示此方法給真實(shí)對象某個(gè)操作進(jìn)行的代理操作
  def rent_house(self, rental, agency_fee):
    """收取租金和中介費(fèi)，并將房子出租給客戶"""
    self.account += agency_fee
    house_key = self.house_resource[0].rent_house(rental)
    return house_key


class Renter:
  """客戶端類：租戶"""
  def __init__(self):
    self.account = 10000
    self.house_key = None
    self.house_agent = HouseAgent()

  def find_house(self):
    """在某一個(gè)中介（代理對象）處出租房子"""
    self.house_key = self.house_agent.rent_house(3000, 1000)
    print("You've rented a house!")


if __name__ == '__main__':
  renter = Renter()
  renter.find_house()