from db import MongoDao
from data import BrandInfo, ProductInfo

product_dao = MongoDao("vbrand-ec")

class Service:
    @staticmethod
    def get_brand_list():
        """获取数据库中存储的品牌列表"""
        brand_list = product_dao.get_one_field_data("brandName")
        brand_list = list(dict.fromkeys(brand_list))
        
        return brand_list
    
    @staticmethod
    def load_products_by_brand(brand_name):
        """加载选定品牌的所有商品"""
        brand_info = BrandInfo(brand_name)
        return [product.title for product in brand_info.product_list], brand_info


if __name__ == "__main__":
    brand_list = Service.get_brand_list()
    print(brand_list)