# Copyright 2009-2014 Eucalyptus Systems, Inc.
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from euca2ools.commands.ec2 import EC2Request
from requestbuilder import Arg


class MonitorInstances(EC2Request):
    DESCRIPTION = 'Enable monitoring for one or more instances'
    ARGS = [Arg('InstanceId', metavar='INSTANCE', nargs='+', help='''ID(s) of
                the instance(s) to begin monitoring (at least 1 required)''')]
    LIST_TAGS = ['instancesSet']

    def print_result(self, result):
        for instance in result.get('instancesSet', []):
            mon_state = 'monitoring-{0}'.format(
                instance.get('monitoring', {}).get('state'))
            print self.tabify((instance.get('instanceId'), mon_state))
