# Copyright (c) 2015-2016 Hewlett Packard Enterprise Development LP
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from requestbuilder import Arg
from requestbuilder.mixins import TabifyingMixin

from euca2ools.commands.elasticloadbalancing import ELBRequest


class DescribeLoadBalancerAttributes(ELBRequest, TabifyingMixin):
    DESCRIPTION = "Show a load balancer's attributes"
    ARGS = [Arg('LoadBalancerName', metavar='ELB',
                help='the load balancer to describe (required)')]

    def print_result(self, result):
        attrs = result.get('LoadBalancerAttributes') or {}
        for key, val in sorted(flatten(attrs)):
            print self.tabify((key, val))


def flatten(attrs):
    for key, val in attrs.items():
        if isinstance(val, dict):
            for subkey, subval in flatten(val):
                yield '{0}.{1}'.format(key, subkey), subval
        else:
            yield key, val