# Copyright 2015 - StackStorm, 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.

import copy

import yaml

from mistral import exceptions as exc
from mistral.openstack.common import log as logging
from mistral.tests import base
from mistral import utils
from mistral.workbook import parser as spec_parser


LOG = logging.getLogger(__name__)


class WorkflowSpecValidationTestCase(base.BaseTest):

    def __init__(self, *args, **kwargs):
        super(WorkflowSpecValidationTestCase, self).__init__(*args, **kwargs)

        # The relative resource path is ./mistral/tests/resources/workbook/v2.
        self._resource_path = 'workbook/v2'

        self._spec_parser = spec_parser.get_workflow_list_spec_from_yaml

        self._dsl_blank = {
            'version': '2.0',
            'test': {
                'type': 'direct'
            }
        }

        self._dsl_tasks = {
            'get': {
                'action': 'std.http',
                'input': {
                    'url': 'http://www.openstack.org'
                }
            },
            'echo': {
                'action': 'std.echo',
                'input': {
                    'output': 'This is a test.'
                }
            },
            'email': {
                'action': 'std.email',
                'input': {
                    'from_addr': 'mistral@example.com',
                    'to_addrs': ['admin@example.com'],
                    'subject': 'Test',
                    'body': 'This is a test.',
                    'smtp_server': 'localhost',
                    'smtp_password': 'password'
                }
            }
        }

    def _parse_dsl_spec(self, dsl_file=None, add_tasks=False,
                        changes=None, expect_error=False):
        if dsl_file and add_tasks:
            raise Exception('The add_tasks option is not a valid '
                            'combination with the dsl_file option.')

        if dsl_file:
            dsl_yaml = base.get_resource(self._resource_path + '/' + dsl_file)

            if changes:
                dsl_dict = yaml.safe_load(dsl_yaml)
                utils.merge_dicts(dsl_dict, changes)
                dsl_yaml = yaml.safe_dump(dsl_dict, default_flow_style=False)
        else:
            dsl_dict = copy.deepcopy(self._dsl_blank)

            if add_tasks:
                dsl_dict['test']['tasks'] = copy.deepcopy(self._dsl_tasks)

            if changes:
                utils.merge_dicts(dsl_dict, changes)

            dsl_yaml = yaml.safe_dump(dsl_dict,
                                      default_flow_style=False)

        if not expect_error:
            return self._spec_parser(dsl_yaml)
        else:
            return self.assertRaises(exc.DSLParsingException,
                                     self._spec_parser,
                                     dsl_yaml)


class WorkbookSpecValidationTestCase(WorkflowSpecValidationTestCase):

    def __init__(self, *args, **kwargs):
        super(WorkbookSpecValidationTestCase, self).__init__(*args, **kwargs)

        self._spec_parser = spec_parser.get_workbook_spec_from_yaml

        self._dsl_blank = {
            'version': '2.0',
            'name': 'test_wb'
        }

    def _parse_dsl_spec(self, dsl_file=None,
                        changes=None, expect_error=False):
        return super(WorkbookSpecValidationTestCase, self)._parse_dsl_spec(
            dsl_file=dsl_file, add_tasks=False, changes=changes,
            expect_error=expect_error)
