from grocy.request import Request
from grocy.conf import Configuration
import logging


class ShoppingList(object):
    ADD_PRODUCT_URL_TEMPLATE = '{domain}/api/stock/shoppinglist/add-product'

    def __init__(self, id=None):
        self.conf = Configuration()
        self.conf.load()
        self.id = id

    def add_product(self, entity):
        logger = logging.getLogger('shoppinglist.add_product')
        try:
            if self.id is None:
                raise Exception('shopping list id is required')
            if entity and 'product_id' not in entity:
                raise Exception('Must provide a product id')
            if entity and 'product_amount' not in entity:
                raise Exception('Must provide a product_amount id')

            entity['list_id'] = self.id
            url = self.ADD_PRODUCT_URL_TEMPLATE.format(domain=self.conf.domain)
            request = Request('post', url, resource=entity)
            return request.send()
        except Exception as e:
            logger.error(e)
            raise e