#   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.

import argparse
import json
import logging
import os
import yaml

from osc_lib.command import command
from osc_lib.i18n import _

from tripleoclient import exceptions
from tripleoclient import utils
from tripleoclient.workflows import base
from tripleoclient.workflows import parameters


class SetParameters(command.Command):
    """Set a parameters for a plan"""

    log = logging.getLogger(__name__ + ".CreatePlan")

    def get_parser(self, prog_name):
        parser = super(SetParameters, self).get_parser(prog_name)
        parser.add_argument(
            'name',
            help=_('The name of the plan, which is used for the Swift '
                   'container, Mistral environment and Heat stack names.'))
        parser.add_argument('file_in', type=argparse.FileType('r'))

        return parser

    def take_action(self, parsed_args):
        self.log.debug("take_action(%s)" % parsed_args)

        if parsed_args.file_in.name.endswith('.json'):
            params = json.load(parsed_args.file_in)
        elif parsed_args.file_in.name.endswith('.yaml'):
            params = yaml.safe_load(parsed_args.file_in)
        else:
            raise exceptions.InvalidConfiguration(
                _("Invalid file extension for %s, must be json or yaml") %
                parsed_args.file_in.name)

        if 'parameter_defaults' in params:
            params = params['parameter_defaults']

        clients = self.app.client_manager
        workflow_client = clients.workflow_engine

        name = parsed_args.name

        parameters.update_parameters(
            workflow_client,
            container=name,
            parameters=params
        )


class GenerateFencingParameters(command.Command):
    """Generate fencing parameters"""

    log = logging.getLogger(__name__ + ".GenerateFencing")

    def get_parser(self, prog_name):
        parser = super(GenerateFencingParameters, self).get_parser(prog_name)
        parser.add_argument('-a', '--action', dest='fence_action',
                            help=_('Operation to perform. Valid operations: '
                                   'on, off, reboot, status, list, diag, '
                                   'monitor or metadata. You should generally '
                                   'not use this option.'))
        parser.add_argument('--delay', type=int,
                            help=_('Wait DELAY seconds before fencing is '
                                   'started'))
        parser.add_argument('--ipmi-lanplus',
                            action='store_true',
                            help=_('Use Lanplus. Defaults to: false'))
        parser.add_argument('--ipmi-cipher', type=int,
                            help=_('Ciphersuite to use (same as ipmitool -C '
                                   'parameter.'))
        parser.add_argument('--ipmi-level',
                            help=_('Privilegel level on IPMI device. Valid '
                                   'levels: callback, user, operator, '
                                   'administrator.'))
        parser.add_argument('--output', type=argparse.FileType('w'),
                            help=_('Write parameters to a file'))
        parser.add_argument('instackenv', type=argparse.FileType('r'))
        return parser

    def take_action(self, parsed_args):
        nodes_config = utils.parse_env_file(parsed_args.instackenv)

        # We only need to collect OpenStack client authentication data
        # if we have nodes using Ironic's pxe_ssh driver. If there are
        # any, we'll use the fence_ironic fencing agent, which requires
        # the auth data.
        os_auth = None
        for node in nodes_config:
            if node["pm_type"] == "pxe_ssh":
                os_auth = {}
        if os_auth:
            try:
                os_auth["auth_url"] = os.environ["OS_AUTH_URL"]
                os_auth["login"] = os.environ["OS_USERNAME"]
                os_auth["passwd"] = os.environ["OS_PASSWORD"]
                os_auth["tenant_name"] = os.environ["OS_TENANT_NAME"]
            except KeyError:
                # This really shouldn't happen since we're running in
                # tripleoclient
                raise ValueError(
                    _("Unable to find one or more of OS_AUTH_URL, "
                      "OS_USERNAME, OS_PASSWORD or OS_TENANT_NAME in the "
                      "environment."))
        workflow_input = {
            'nodes_json': nodes_config,
            'os_auth': os_auth,
            'fence_action': parsed_args.fence_action,
            'delay': parsed_args.delay,
            'ipmi_level': parsed_args.ipmi_level,
            'ipmi_cipher': parsed_args.ipmi_cipher,
            'ipmi_lanplus': parsed_args.ipmi_lanplus,
            }
        result = base.call_action(
            self.app.client_manager.workflow_engine,
            'tripleo.parameters.generate_fencing',
            **workflow_input)
        fencing_parameters = yaml.safe_dump(result, default_flow_style=False)
        if parsed_args.output:
            parsed_args.output.write(fencing_parameters)
        else:
            print(fencing_parameters)