# Copyright (c) 2013-2016 Hewlett Packard Enterprise Development LP
#
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# with or without modification, are permitted provided that the following
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from requestbuilder import Arg
from requestbuilder.mixins import TabifyingMixin
from requestbuilder.response import PaginatedResponse

from euca2ools.commands.monitoring import CloudWatchRequest


class DescribeAlarms(CloudWatchRequest, TabifyingMixin):
    DESCRIPTION = 'Describe alarms'
    ARGS = [Arg('AlarmNames.member', metavar='ALARM', nargs='*',
                help='limit results to specific alarms'),
            Arg('--action-prefix', dest='ActionPrefix', metavar='PREFIX',
                help='''limit results to alarms whose actions' ARNs begin with
                a specific string'''),
            Arg('--alarm-name-prefix', dest='AlarmNamePrefix',
                metavar='PREFIX', help='''limit results to alarms whose names
                begin with a specific string'''),
            Arg('--show-long', action='store_true', route_to=None,
                help="show all of the alarms' info"),
            Arg('--state-value', dest='StateValue',
                choices=('OK', 'ALARM', 'INSUFFICIENT_DATA'),
                help='limit results to alarms in a specific state')]
    LIST_TAGS = ['MetricAlarms', 'AlarmActions', 'Dimensions',
                 'InsufficientDataActions', 'OKActions']

    def main(self):
        return PaginatedResponse(self, (None,), ('MetricAlarms',))

    def prepare_for_page(self, page):
        self.params['NextToken'] = page

    # pylint: disable=no-self-use
    def get_next_page(self, response):
        return response.get('NextToken') or None
    # pylint: enable=no-self-use

    def print_result(self, result):
        for alarm in result.get('MetricAlarms', []):
            self.print_alarm(alarm)
