# Copyright 2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
#     http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.


from awscli.customizations.emr import argumentschema
from awscli.customizations.emr import emrutils
from awscli.customizations.emr import helptext
from awscli.customizations.emr import instancegroupsutils
from awscli.customizations.emr.command import Command


class AddInstanceGroups(Command):
    NAME = 'add-instance-groups'
    DESCRIPTION = 'Adds an instance group to a running cluster.'
    ARG_TABLE = [
        {
            'name': 'cluster-id',
            'required': True,
            'help_text': helptext.CLUSTER_ID,
        },
        {
            'name': 'instance-groups',
            'required': True,
            'help_text': helptext.INSTANCE_GROUPS,
            'schema': argumentschema.INSTANCE_GROUPS_SCHEMA,
        },
    ]

    def _run_main_command(self, parsed_args, parsed_globals):
        parameters = {'JobFlowId': parsed_args.cluster_id}
        parameters['InstanceGroups'] = (
            instancegroupsutils.build_instance_groups(
                parsed_args.instance_groups
            )
        )

        add_instance_groups_response = emrutils.call(
            self._session,
            'add_instance_groups',
            parameters,
            self.region,
            parsed_globals.endpoint_url,
            parsed_globals.verify_ssl,
        )

        constructed_result = self._construct_result(
            add_instance_groups_response
        )

        emrutils.display_response(
            self._session,
            'add_instance_groups',
            constructed_result,
            parsed_globals,
        )
        return 0

    def _construct_result(self, add_instance_groups_result):
        jobFlowId = None
        instanceGroupIds = None
        clusterArn = None
        if add_instance_groups_result is not None:
            jobFlowId = add_instance_groups_result.get('JobFlowId')
            instanceGroupIds = add_instance_groups_result.get(
                'InstanceGroupIds'
            )
            clusterArn = add_instance_groups_result.get('ClusterArn')

        if jobFlowId is not None and instanceGroupIds is not None:
            return {
                'ClusterId': jobFlowId,
                'InstanceGroupIds': instanceGroupIds,
                'ClusterArn': clusterArn,
            }
        else:
            return {}
