# Copyright (c) 2016 VMware, Inc.
# 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.

import logging
import os

from oslo_config import cfg

from osprofiler.drivers import base
from osprofiler import initializer
from osprofiler import opts
from osprofiler import profiler
from osprofiler.tests import test


CONF = cfg.CONF
LOG = logging.getLogger(__name__)


@profiler.trace_cls("rpc", hide_args=True)
class Foo(object):
    def bar(self, x):
        return self.baz(x, x)

    def baz(self, x, y):
        return x * y


class DriverTestCase(test.FunctionalTestCase):

    SERVICE = "service"
    PROJECT = "project"

    def setUp(self):
        super(DriverTestCase, self).setUp()
        CONF(["--config-file", os.path.dirname(__file__) + "/config.cfg"])
        opts.set_defaults(CONF,
                          enabled=True,
                          trace_sqlalchemy=False,
                          hmac_keys="SECRET_KEY")

    def _assert_dict(self, info, **kwargs):
        for key in kwargs:
            self.assertEqual(kwargs[key], info[key])

    def _assert_child_dict(self, child, base_id, parent_id, name, fn_name):
        self.assertEqual(parent_id, child["parent_id"])

        exp_info = {"name": "rpc",
                    "service": self.SERVICE,
                    "project": self.PROJECT}
        self._assert_dict(child["info"], **exp_info)

        raw_start = child["info"]["meta.raw_payload.%s-start" % name]
        self.assertEqual(fn_name, raw_start["info"]["function"]["name"])
        exp_raw = {"name": "%s-start" % name,
                   "service": self.SERVICE,
                   "trace_id": child["trace_id"],
                   "project": self.PROJECT,
                   "base_id": base_id}
        self._assert_dict(raw_start, **exp_raw)

        raw_stop = child["info"]["meta.raw_payload.%s-stop" % name]
        exp_raw["name"] = "%s-stop" % name
        self._assert_dict(raw_stop, **exp_raw)

    def test_get_report(self):
        # initialize profiler notifier (the same way as in services)
        initializer.init_from_conf(
            CONF, {}, self.PROJECT, self.SERVICE, "host")
        profiler.init("SECRET_KEY")

        # grab base_id
        base_id = profiler.get().get_base_id()

        # execute profiled code
        foo = Foo()
        foo.bar(1)

        # instantiate report engine (the same way as in osprofiler CLI)
        engine = base.get_driver(CONF.profiler.connection_string,
                                 project=self.PROJECT,
                                 service=self.SERVICE,
                                 host="host",
                                 conf=CONF)

        # generate the report
        report = engine.get_report(base_id)
        LOG.debug("OSProfiler report: %s", report)

        # verify the report
        self.assertEqual("total", report["info"]["name"])
        self.assertEqual(2, report["stats"]["rpc"]["count"])
        self.assertEqual(1, len(report["children"]))

        cbar = report["children"][0]
        self._assert_child_dict(
            cbar, base_id, base_id, "rpc",
            "osprofiler.tests.functional.test_driver.Foo.bar")

        self.assertEqual(1, len(cbar["children"]))
        cbaz = cbar["children"][0]
        self._assert_child_dict(
            cbaz, base_id, cbar["trace_id"], "rpc",
            "osprofiler.tests.functional.test_driver.Foo.baz")