# Copyright 2013 Eucalyptus Systems, Inc.
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from euca2ools.commands.argtypes import delimited_list
from euca2ools.commands.elasticloadbalancing import ELBRequest
from requestbuilder import Arg
from requestbuilder.mixins import TabifyingMixin


def instance_id(inst_as_str):
    return {'InstanceId': inst_as_str}


class DescribeInstanceHealth(ELBRequest, TabifyingMixin):
    DESCRIPTION = 'Show the state of instances registered with a load balancer'
    ARGS = [Arg('LoadBalancerName', metavar='ELB', help='''name of the load
                balancer to describe instances for (required)'''),
            Arg('--instances', dest='Instances.member',
                metavar='INSTANCE1,INSTANCE2,...',
                type=delimited_list(',', item_type=instance_id),
                help='limit results to specific instances'),
            Arg('--show-long', action='store_true', route_to=None,
                help="show all of the instances' info")]
    LIST_TAGS = ['InstanceStates']

    def print_result(self, result):
        for instance in result.get('InstanceStates', []):
            bits = ['INSTANCE', instance.get('InstanceId'),
                    instance.get('State')]
            if self.args['show_long']:
                bits.append(instance.get('Description'))
                bits.append(instance.get('ReasonCode'))
            print self.tabify(bits)