# -*- encoding: utf-8 -*-
#
# Copyright © 2012 New Dream Network, LLC (DreamHost)
#
# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
#
# 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.
"""

import urllib

import flask
from oslo.config import cfg
import pecan
import pecan.testing

from ceilometer.openstack.common import jsonutils
from ceilometer.api import acl
from ceilometer.api.v1 import app as v1_app
from ceilometer.api.v1 import blueprint as v1_blueprint
from ceilometer import service
from ceilometer.tests import db as db_test_base


class TestBase(db_test_base.TestBase):
    """Use only for v1 API tests.
    """

    def setUp(self):
        super(TestBase, self).setUp()
        service.prepare_service([])
        cfg.CONF.set_override("auth_version", "v2.0", group=acl.OPT_GROUP_NAME)
        cfg.CONF.set_override("policy_file",
                              self.path_get('tests/policy.json'))
        sources_file = self.path_get('tests/sources.json')
        self.app = v1_app.make_app(cfg.CONF,
                                   enable_acl=False,
                                   attach_storage=False,
                                   sources_file=sources_file)

        # this is needed to pass over unhandled exceptions
        self.app.debug = True

        self.app.register_blueprint(v1_blueprint.blueprint)
        self.test_app = self.app.test_client()

        @self.app.before_request
        def attach_storage_connection():
            flask.request.storage_conn = self.conn

    def get(self, path, headers=None, **kwds):
        if kwds:
            query = path + '?' + urllib.urlencode(kwds)
        else:
            query = path
        rv = self.test_app.get(query, headers=headers)
        if rv.status_code == 200 and rv.content_type == 'application/json':
            try:
                data = jsonutils.loads(rv.data)
            except ValueError:
                print('RAW DATA:%s' % rv)
                raise
            return data
        return rv


class FunctionalTest(db_test_base.TestBase):
    """Used for functional tests of Pecan controllers where you need to
    test your literal application and its integration with the
    framework.
    """

    PATH_PREFIX = ''

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

    def setUp(self):
        super(FunctionalTest, self).setUp()
        cfg.CONF.set_override("auth_version", "v2.0", group=acl.OPT_GROUP_NAME)
        cfg.CONF.set_override("policy_file",
                              self.path_get('tests/policy.json'))
        self.app = self._make_app()

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

        self.config = {
            'app': {
                'root': 'ceilometer.api.controllers.root.RootController',
                'modules': ['ceilometer.api'],
                'static_root': '%s/public' % root_dir,
                'template_path': '%s/ceilometer/api/templates' % root_dir,
                'enable_acl': enable_acl,
            },
        }

        return pecan.testing.load_test_app(self.config)

    def tearDown(self):
        super(FunctionalTest, self).tearDown()
        pecan.set_config({}, overwrite=True)

    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.post_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,
                  method="post", 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 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
        """
        full_path = self.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 delete(self, path, expect_errors=False, headers=None,
               extra_environ=None, status=None):
        """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
        """
        full_path = self.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=[], groupby=[], **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 groupby: list of fields to group by
        :param params: content for wsgi.input of request
        """
        full_path = self.PATH_PREFIX + path
        query_params = {'q.field': [],
                        'q.value': [],
                        'q.op': [],
                        'q.type': [],
                        }
        for query in q:
            for name in ['field', 'op', 'value', 'type']:
                query_params['q.%s' % name].append(query.get(name, ''))
        all_params = {}
        all_params.update(params)
        if q:
            all_params.update(query_params)
        if groupby:
            all_params.update({'groupby': groupby})
        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
