# Path: oscar_mws/api.py
# class MWSObject(OrderedDict):
# 
#     def get_list(self, name):
#         value = self.get(name)
#         if not value:
#             return []
#         if isinstance(value, (list, tuple)):
#             return value
#         return [value]
# 
#     def __getattribute__(self, name):
#         try:
#             value = self[name]
#         except KeyError:
#             value = super(MWSObject, self).__getattribute__(name)
#         return value
# 
# class MWSError(Exception):
#     """
#     Main MWS Exception class
#     """
#     # Allows quick access to the response object.
#     # Do not rely on this attribute, always check if its not None.
#     response = None
#     url = None
# 
# Path: oscar_mws/signals.py

# 
# Path: oscar_mws/connection.py
# def get_merchant_connection(merchant_id, api_name):
#     global _mws_connections
# 
#     if merchant_id in _mws_connections:
#         return _mws_connections[merchant_id].get_api_class(api_name)
# 
#     try:
#         connection = Connection(merchant_id)
#     except ImproperlyConfigured as exc:
#         logger.error(exc.message)
#         return None
# 
#     _mws_connections[merchant_id] = connection
#     return _mws_connections[merchant_id].get_api_class(api_name)


import logging
from collections import defaultdict
from dateutil import parser as du_parser
from django.db.models import get_model
from django.core.exceptions import ObjectDoesNotExist
from oscar.core.loading import get_class
from ..api import MWSObject, MWSError
from ..signals import mws_fulfillment_created
from ..connection import get_merchant_connection
def update_inventory(products):
    """
    Update the available inventory for the *products* as available on MWS for
    fulfillment by Amazon. Products that are passed in but don't have a
    merchant account associated with them and/or no :class:`AmazonProfile
    <oscar_mws.models.AmazonProfile>`. For all products that are handled on
    Amazon, the available inventory is retrieved and stored in the stock record
    associated with the combination of :class:`AmazonProfile
    <oscar_mws.models.AmazonProfile>` and :class:`MerchantAccount
    <oscar_mws.models.MerchantAccount>`.

    :param list products: A list of product models.

    :raises MWSError: if an error occurs when communicating with MWS
    """
    product_values = Product.objects.filter(
        id__in=[p.id for p in products],
    ).values_list(
        'amazon_profile__sku',
        'amazon_profile__marketplaces__merchant__seller_id'
    )
    submit_products = defaultdict(set)
    for sku, seller_id in product_values:
        if seller_id is None:
            logger.warning(
                'Product with SKU {} has no seller account'.format(sku))
            continue
        submit_products[seller_id].add(sku)

    for seller_id, skus in submit_products.iteritems():

# Path: oscar_mws/api.py
# class MWSObject(OrderedDict):
# 
#     def get_list(self, name):
#         value = self.get(name)
#         if not value:
#             return []
#         if isinstance(value, (list, tuple)):
#             return value
#         return [value]
# 
#     def __getattribute__(self, name):
#         try:
#             value = self[name]
#         except KeyError:
#             value = super(MWSObject, self).__getattribute__(name)
#         return value
# 
# class MWSError(Exception):
#     """
#     Main MWS Exception class
#     """
#     # Allows quick access to the response object.
#     # Do not rely on this attribute, always check if its not None.
#     response = None
#     url = None
# 
# Path: oscar_mws/signals.py

# 
# Path: oscar_mws/connection.py
# def get_merchant_connection(merchant_id, api_name):
#     global _mws_connections
# 
#     if merchant_id in _mws_connections:
#         return _mws_connections[merchant_id].get_api_class(api_name)
# 
#     try:
#         connection = Connection(merchant_id)
#     except ImproperlyConfigured as exc:
#         logger.error(exc.message)
#         return None
# 
#     _mws_connections[merchant_id] = connection
#     return _mws_connections[merchant_id].get_api_class(api_name)


# Path: oscar_mws/fulfillment/gateway.py
import logging
from collections import defaultdict
from dateutil import parser as du_parser
from django.db.models import get_model
from django.core.exceptions import ObjectDoesNotExist
from oscar.core.loading import get_class
from ..api import MWSObject, MWSError
from ..signals import mws_fulfillment_created
from ..connection import get_merchant_connection

def update_inventory(products):
    """
    Update the available inventory for the *products* as available on MWS for
    fulfillment by Amazon. Products that are passed in but don't have a
    merchant account associated with them and/or no :class:`AmazonProfile
    <oscar_mws.models.AmazonProfile>`. For all products that are handled on
    Amazon, the available inventory is retrieved and stored in the stock record
    associated with the combination of :class:`AmazonProfile
    <oscar_mws.models.AmazonProfile>` and :class:`MerchantAccount
    <oscar_mws.models.MerchantAccount>`.

    :param list products: A list of product models.

    :raises MWSError: if an error occurs when communicating with MWS
    """
    product_values = Product.objects.filter(
        id__in=[p.id for p in products],
    ).values_list(
        'amazon_profile__sku',
        'amazon_profile__marketplaces__merchant__seller_id'
    )
    submit_products = defaultdict(set)
    for sku, seller_id in product_values:
        if seller_id is None:
            logger.warning(
                'Product with SKU {} has no seller account'.format(sku))
            continue
        submit_products[seller_id].add(sku)

    for seller_id, skus in submit_products.iteritems():

        inventory_api = get_merchant_connection(seller_id, 'inventory')