#!/usr/bin/python

# *****************************************************************************
#
# Copyright (c) 2016, EPAM SYSTEMS INC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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 dlab.fab import *
from dlab.actions_lib import *
from dlab.meta_lib import *
import sys, os
from fabric.api import *
from dlab.ssn_lib import *


def terminate_ssn_node(resource_group_name, service_base_name, vpc_name, region):
    print("Terminating instances")
    try:
        for vm in AzureMeta().compute_client.virtual_machines.list(resource_group_name):
            if service_base_name == vm.tags["SBN"]:
                AzureActions().remove_instance(resource_group_name, vm.name)
                print("Instance {} has been terminated".format(vm.name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing network interfaces")
    try:
        for network_interface in AzureMeta().list_network_interfaces(resource_group_name):
            if service_base_name == network_interface.tags["SBN"]:
                AzureActions().delete_network_if(resource_group_name, network_interface.name)
                print("Network interface {} has been removed".format(network_interface.name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing static public IPs")
    try:
        for static_public_ip in AzureMeta().list_static_ips(resource_group_name):
            if service_base_name == static_public_ip.tags["SBN"]:
                AzureActions().delete_static_public_ip(resource_group_name, static_public_ip.name)
                print("Static public IP {} has been removed".format(static_public_ip.name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing disks")
    try:
        for disk in AzureMeta().list_disks(resource_group_name):
            if service_base_name == disk.tags["SBN"]:
                AzureActions().remove_disk(resource_group_name, disk.name)
                print("Disk {} has been removed".format(disk.name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing storage accounts")
    try:
        for storage_account in AzureMeta().list_storage_accounts(resource_group_name):
            if service_base_name == storage_account.tags["SBN"]:
                AzureActions().remove_storage_account(resource_group_name, storage_account.name)
                print("Storage account {} has been terminated".format(storage_account.name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing Data Lake Store")
    try:
        for datalake in AzureMeta().list_datalakes(resource_group_name):
            if service_base_name == datalake.tags["SBN"]:
                AzureActions().delete_datalake_store(resource_group_name, datalake.name)
                print("Data Lake Store {} has been terminated".format(datalake.name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing images")
    try:
        for image in AzureMeta().list_images():
            if service_base_name == image.tags["SBN"]:
                AzureActions().remove_image(resource_group_name, image.name)
                print("Image {} has been removed".format(image.name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing security groups")
    try:
        for sg in AzureMeta().network_client.network_security_groups.list(resource_group_name):
            if service_base_name == sg.tags["SBN"]:
                AzureActions().remove_security_group(resource_group_name, sg.name)
                print("Security group {} has been terminated".format(sg.name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing VPC")
    try:
        if AzureMeta().get_vpc(resource_group_name, service_base_name + '-vpc'):
            AzureActions().remove_vpc(resource_group_name, vpc_name)
            print("VPC {} has been terminated".format(vpc_name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)

    print("Removing Resource Group")
    try:
        if AzureMeta().get_resource_group(service_base_name):
            AzureActions().remove_resource_group(service_base_name, region)
            print("Resource group {} has been terminated".format(vpc_name))
    except Exception as err:
        print('Error: {0}'.format(err))
        sys.exit(1)


if __name__ == "__main__":
    local_log_filename = "{}_{}.log".format(os.environ['conf_resource'], os.environ['request_id'])
    local_log_filepath = "/logs/" + os.environ['conf_resource'] + "/" + local_log_filename
    logging.basicConfig(format='%(levelname)-8s [%(asctime)s]  %(message)s',
                        level=logging.DEBUG,
                        filename=local_log_filepath)
    # generating variables dictionary
    print('Generating infrastructure names and tags')
    ssn_conf = dict()
    ssn_conf['service_base_name'] = replace_multi_symbols(
        os.environ['conf_service_base_name'].replace('_', '-')[:12], '-', True)
    ssn_conf['resource_group_name'] = replace_multi_symbols(
        os.environ['azure_resource_group_name'].replace('_', '-')[:12], '-', True)
    ssn_conf['region'] = os.environ['azure_region']
    ssn_conf['vpc_name'] = os.environ['azure_vpc_name']

    try:
        logging.info('[TERMINATE SSN]')
        print('[TERMINATE SSN]')
        try:
            terminate_ssn_node(ssn_conf['resource_group_name'], ssn_conf['service_base_name'], ssn_conf['vpc_name'],
                               ssn_conf['region'])
        except:
            traceback.print_exc()
            raise Exception
    except Exception as err:
        print('Error: {0}'.format(err))
        append_result("Failed to terminate ssn.", str(err))
        sys.exit(1)

    try:
        with open("/root/result.json", 'w') as result:
            res = {"service_base_name": ssn_conf['service_base_name'],
                   "Action": "Terminate ssn with all service_base_name environment"}
            print(json.dumps(res))
            result.write(json.dumps(res))
    except:
        print("Failed writing results.")
        sys.exit(0)