#
# Copyright (c) 2014 EUROGICIEL
#
#    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 oslo.config import cfg
import pecan.testing

from cerberus.api import auth
from cerberus.db import api as dbapi
from cerberus.tests.unit import base


PATH_PREFIX = '/v1'


class TestApiCase(base.TestCase):

    def setUp(self):
        super(TestApiCase, self).setUp()
        self.app = self._make_app()
        self.dbapi = dbapi.get_instance()
        cfg.CONF.set_override("auth_version",
                              "v2.0",
                              group=auth.OPT_GROUP_NAME)

    def _make_app(self, enable_acl=False):

        root_dir = self.path_get()

        self.config = {
            'app': {
                'root': 'cerberus.api.root.RootController',
                'modules': ['cerberus.api'],
                'static_root': '%s/public' % root_dir,
                'template_path': '%s/api/templates' % root_dir,
                'enable_acl': enable_acl,
                'acl_public_routes': ['/', '/v1', '/security_reports']
            },
        }
        return pecan.testing.load_test_app(self.config)

    def _request_json(self, path, params, expect_errors=False, headers=None,
                      method="post", extra_environ=None, status=None,
                      path_prefix=PATH_PREFIX):
        """Sends simulated HTTP request to Pecan test app.

        :param path: url path of target service
        :param params: content for wsgi.input of request
        :param expect_errors: Boolean value; whether an error is expected based
                              on request
        :param headers: a dictionary of headers to send along with the request
        :param method: Request method type. Appropriate method function call
                       should be used rather than passing attribute in.
        :param extra_environ: a dictionary of environ variables to send along
                              with the request
        :param status: expected status code of response
        :param path_prefix: prefix of the url path
        """
        full_path = path_prefix + path
        print('%s: %s %s' % (method.upper(), full_path, params))
        response = getattr(self.app, "%s_json" % method)(
            str(full_path),
            params=params,
            headers=headers,
            status=status,
            extra_environ=extra_environ,
            expect_errors=expect_errors
        )
        print('GOT:%s' % response)
        return response

    def put_json(self, path, params, expect_errors=False, headers=None,
                 extra_environ=None, status=None):
        """Sends simulated HTTP PUT request to Pecan test app.

        :param path: url path of target service
        :param params: content for wsgi.input of request
        :param expect_errors: Boolean value; whether an error is expected based
                              on request
        :param headers: a dictionary of headers to send along with the request
        :param extra_environ: a dictionary of environ variables to send along
                              with the request
        :param status: expected status code of response
        """
        return self._request_json(path=path, params=params,
                                  expect_errors=expect_errors,
                                  headers=headers, extra_environ=extra_environ,
                                  status=status, method="put")

    def post_json(self, path, params, expect_errors=False, headers=None,
                  extra_environ=None, status=None):
        """Sends simulated HTTP POST request to Pecan test app.

        :param path: url path of target service
        :param params: content for wsgi.input of request
        :param expect_errors: Boolean value; whether an error is expected based
                              on request
        :param headers: a dictionary of headers to send along with the request
        :param extra_environ: a dictionary of environ variables to send along
                              with the request
        :param status: expected status code of response
        """
        return self._request_json(path=path, params=params,
                                  expect_errors=expect_errors,
                                  headers=headers, extra_environ=extra_environ,
                                  status=status, method="post")

    def patch_json(self, path, params, expect_errors=False, headers=None,
                   extra_environ=None, status=None):
        """Sends simulated HTTP PATCH request to Pecan test app.

        :param path: url path of target service
        :param params: content for wsgi.input of request
        :param expect_errors: Boolean value; whether an error is expected based
                              on request
        :param headers: a dictionary of headers to send along with the request
        :param extra_environ: a dictionary of environ variables to send along
                              with the request
        :param status: expected status code of response
        """
        return self._request_json(path=path, params=params,
                                  expect_errors=expect_errors,
                                  headers=headers, extra_environ=extra_environ,
                                  status=status, method="patch")

    def delete(self, path, expect_errors=False, headers=None,
               extra_environ=None, status=None, path_prefix=PATH_PREFIX):
        """Sends simulated HTTP DELETE request to Pecan test app.

        :param path: url path of target service
        :param expect_errors: Boolean value; whether an error is expected based
                              on request
        :param headers: a dictionary of headers to send along with the request
        :param extra_environ: a dictionary of environ variables to send along
                              with the request
        :param status: expected status code of response
        :param path_prefix: prefix of the url path
        """
        full_path = path_prefix + path
        print('DELETE: %s' % (full_path))
        response = self.app.delete(str(full_path),
                                   headers=headers,
                                   status=status,
                                   extra_environ=extra_environ,
                                   expect_errors=expect_errors)
        print('GOT:%s' % response)
        return response

    def get_json(self, path, expect_errors=False, headers=None,
                 extra_environ=None, q=[], path_prefix=PATH_PREFIX, **params):
        """Sends simulated HTTP GET request to Pecan test app.

        :param path: url path of target service
        :param expect_errors: Boolean value;whether an error is expected based
                              on request
        :param headers: a dictionary of headers to send along with the request
        :param extra_environ: a dictionary of environ variables to send along
                              with the request
        :param q: list of queries consisting of: field, value, op, and type
                  keys
        :param path_prefix: prefix of the url path
        :param params: content for wsgi.input of request
        """
        full_path = path_prefix + path
        query_params = {'q.field': [],
                        'q.value': [],
                        'q.op': [],
                        }
        for query in q:
            for name in ['field', 'op', 'value']:
                query_params['q.%s' % name].append(query.get(name, ''))
        all_params = {}
        all_params.update(params)
        if q:
            all_params.update(query_params)
        print('GET: %s %r' % (full_path, all_params))
        response = self.app.get(full_path,
                                params=all_params,
                                headers=headers,
                                extra_environ=extra_environ,
                                expect_errors=expect_errors)
        if not expect_errors:
            response = response.json
        print('GOT:%s' % response)
        return response

    def validate_link(self, link):
        """Checks if the given link can get correct data."""

        # removes 'http://loicalhost' part
        full_path = link.split('localhost', 1)[1]
        try:
            self.get_json(full_path, path_prefix='')
            return True
        except Exception:
            return False