# Copyright (c) 2014 The Johns Hopkins University/Applied Physics Laboratory
# 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. 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 kmip.core.enums import CredentialType
from kmip.core.enums import KeyFormatType as KeyFormatTypeEnum
from kmip.core.enums import Operation
from kmip.core.enums import ResultStatus

from kmip.core.factories.attributes import AttributeFactory
from kmip.core.factories.credentials import CredentialFactory

from kmip.core.misc import KeyFormatType

from kmip.demos import utils

from kmip.services.kmip_client import KMIPProxy

import logging
import sys


if __name__ == '__main__':
    logger = utils.build_console_logger(logging.INFO)

    # Build and parse arguments
    parser = utils.build_cli_parser(Operation.GET)
    opts, args = parser.parse_args(sys.argv[1:])

    username = opts.username
    password = opts.password
    config = opts.config
    uuid = opts.uuid
    format_type = opts.format

    # Exit early if the UUID is not specified
    if uuid is None:
        logger.error('No UUID provided, exiting early from demo')
        sys.exit()

    format_type_enum = None
    if format_type is not None:
        format_type_enum = getattr(KeyFormatTypeEnum, format_type, None)

        if format_type_enum is None:
            logger.error(
                "Invalid key format type specified; exiting early from demo")
            sys.exit()

    attribute_factory = AttributeFactory()
    credential_factory = CredentialFactory()

    # Build the KMIP server account credentials
    # TODO (peter-hamilton) Move up into KMIPProxy
    if (username is None) and (password is None):
        credential = None
    else:
        credential_type = CredentialType.USERNAME_AND_PASSWORD
        credential_value = {'Username': username,
                            'Password': password}
        credential = credential_factory.create_credential(credential_type,
                                                          credential_value)

    key_format_type = None
    if format_type_enum is not None:
        key_format_type = KeyFormatType(format_type_enum)

    # Build the client and connect to the server
    client = KMIPProxy(config=config)
    client.open()

    # Retrieve the SYMMETRIC_KEY object
    result = client.get(uuid=uuid, key_format_type=key_format_type,
                        credential=credential)
    client.close()

    # Display operation results
    logger.info('get() result status: {0}'.format(
        result.result_status.value))

    if result.result_status.value == ResultStatus.SUCCESS:
        logger.info('retrieved object type: {0}'.format(
            result.object_type.value))
        logger.info('retrieved UUID: {0}'.format(result.uuid.value))

        utils.log_secret(logger, result.object_type.value, result.secret)
    else:
        logger.info('get() result reason: {0}'.format(
            result.result_reason.value))
        logger.info('get() result message: {0}'.format(
            result.result_message.value))