# Copyright 2013 Hewlett-Packard Development Company, L.P.
# 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.
"""Base classes for API tests."""

# NOTE: Ported from ceilometer/tests/api.py (subsequently moved to
#       ceilometer/tests/api/__init__.py).

import pecan
import pecan.testing
from requests import utils

from tests import test

PATH_PREFIX = '/v1'


class PecanControllerTest(test.TestCase):
    """Used for functional tests of Pecan controllers.

    Use this class where you need to test your literal application
    and its integration with the framework.
    """

    SOURCE_DATA = {'test_source': {'somekey': '666'}}

    def setUp(self):
        super(PecanControllerTest, self).setUp()
        self.app = self._make_app()

        def reset_pecan():
            pecan.set_config({}, overwrite=True)

        self.addCleanup(reset_pecan)

    def _make_app(self, enable_acl=False):
        # Determine where we are so we can set up paths in the config

        self.config = {
            'app': {
                'root': 'rally.aas.rest.controllers.root.RootController',
                'modules': ['rally.aas.rest'],
            },
        }

        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):
        """Simulate an json request.

        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
        response = getattr(self.app, "%s_json" % method)(
            str(full_path),
            params=params,
            headers=headers,
            status=status,
            extra_environ=extra_environ,
            expect_errors=expect_errors
        )
        return response

    def put_json(self, path, params, expect_errors=False, headers=None,
                 extra_environ=None, status=None):
        """Simulate an put request.

        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):
        """Simulate an post request.

        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):
        """Simulate an patch request.

        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_json(self, path, params, expect_errors=False, headers=None,
                    extra_environ=None, status=None, path_prefix=PATH_PREFIX):
        """Simulate a delete request.

        Sends simulated HTTP DELETE 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
        :param path_prefix: prefix of the url path
        """
        return self._request_json(path=path, params=params,
                                  expect_errors=expect_errors,
                                  headers=headers, extra_environ=extra_environ,
                                  status=status, method="delete")

    def get_json(self, path, expect_errors=False, headers=None,
                 extra_environ=None, q=[], path_prefix=PATH_PREFIX, **params):
        """Simulate a get request.

        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)
        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
        return response

    def validate_link(self, link, bookmark=False):
        """Check if the given link can get correct data."""
        # removes the scheme and net location parts of the link
        url_parts = list(utils.urlparse.urlparse(link))
        url_parts[0] = url_parts[1] = ''

        # bookmark link should not have the version in the URL
        if bookmark and url_parts[2].startswith(PATH_PREFIX):
            return False

        full_path = utils.urlparse.urlunparse(url_parts)
        try:
            self.get_json(full_path, path_prefix='')
            return True
        except Exception:
            return False