# Copyright 2017 Google LLC
#
# 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 datetime
import unittest

import mock


def _str_to_truncatablestr(str_to_convert):
    result = {
        'value': str_to_convert,
        'truncated_byte_count': 0,
    }
    return result


class _Base(object):
    from google.cloud.trace_v2.gapic import enums

    # Set the constants used for tests
    project = 'PROJECT'
    trace_id = 'c801e4119a064c659fe052d88f1d461b'
    span_id = '1234123412341234'
    parent_span_id = '1111000011110000'
    span_name = 'projects/{}/traces/{}/spans/{}'.format(
        project, trace_id, span_id)
    start_time = datetime.datetime.utcnow()
    end_time = datetime.datetime.utcnow()
    type = enums.Span.TimeEvent.MessageEvent.Type.SENT
    display_name = 'test display name'

    attributes = {
        'attributeMap': {
            'test_int_key': {
                'int_value': 123,
            },
            'test_str_key': {
                'string_value': _str_to_truncatablestr('str_value')
            },
            'test_bool_key': {
                'bool_value': True,
            }
        }
    }

    st_function_name = 'test function name'
    st_origin_name = 'test original name'
    st_file_name = 'test file name'
    st_line_number = 12
    st_column_number = 2
    st_test_module = 'test module'
    st_build_id = 'test build id'
    st_source_version = 'test source version'
    stack_trace = {
        'stack_frames': {
            'frame': [
                {
                    'function_name':
                        _str_to_truncatablestr(
                            st_function_name),
                    'original_function_name':
                        _str_to_truncatablestr(st_origin_name),
                    'file_name':
                        _str_to_truncatablestr(st_file_name),
                    'line_number': st_line_number,
                    'column_number': st_column_number,
                    'load_module': {
                        'module':
                            _str_to_truncatablestr(
                                st_test_module),
                        'build_id':
                            _str_to_truncatablestr(
                                st_build_id),
                    },
                    'source_version':
                        _str_to_truncatablestr(
                            st_source_version),
                },
            ],
            'dropped_frames_count': 0,
        },
        'stack_trace_hash_id': 1234,
    }

    te_time = datetime.datetime.utcnow().isoformat() + 'Z'
    te_description = 'test description'
    time_events = {
        'time_event': [
            {
                'time': te_time,
                'annotation': {
                    'description':
                        _str_to_truncatablestr(te_description),
                    'attributes': attributes,
                },  # TimeEvent can contain either annotation
                # or message_event
            }

        ],
        'dropped_annotations_count': 0,
        'dropped_message_events_count': 0
    }

    link_span_id = '1111222211112222'
    links = {
        'link': [
            {
                'trace_id': trace_id,
                'span_id': link_span_id,
                'type': type,
                'attributes': attributes,
            },
        ],
        'dropped_links_count': 0,
    }

    status_code = 888
    status_message = 'test status message'
    status = {
        'code': status_code,
        'message': status_message,
        'details': [],
    }

    same_process_as_parent_span = True
    child_span_count = 0

    def _make_one(self, *args, **kw):
        return self._get_target_class()(*args, **kw)


class Test__TraceAPI(_Base, unittest.TestCase):

    @staticmethod
    def _get_target_class():
        from google.cloud.trace._gapic import _TraceAPI

        return _TraceAPI

    def test_constructor(self):
        gapic_api = object()
        client = object()
        api = self._make_one(gapic_api, client)
        self.assertIs(api._gapic_api, gapic_api)
        self.assertIs(api.client, client)

    def test_batch_write_spans(self):
        from google.cloud.trace_v2.gapic import trace_service_client
        from google.cloud.trace_v2.proto.trace_pb2 import Span
        from google.cloud.trace._gapic import _dict_mapping_to_pb

        spans = {
            'spans': [
                {
                    'name': self.span_name,
                    'span_id': self.span_id,
                    'parent_span_id': self.parent_span_id,
                    'display_name': _str_to_truncatablestr(self.display_name),
                    'start_time': self.start_time.isoformat() + 'Z',
                    'end_time': self.end_time.isoformat() + 'Z',
                    'attributes': self.attributes,
                    'stack_trace': self.stack_trace,
                    'time_events': self.time_events,
                    'links': self.links,
                    'status': self.status,
                    'same_process_as_parent_span':
                        self.same_process_as_parent_span,
                    'child_span_count': self.child_span_count,
                },
            ],
        }

        spans_pb_list = [_dict_mapping_to_pb(spans['spans'][0], 'Span')]
        project_name = 'projects/{}'.format(self.project)

        gapic_api = mock.Mock(spec=trace_service_client.TraceServiceClient)
        api = self._make_one(gapic_api, None)
        retry = mock.Mock()
        timeout = mock.Mock()
        api.batch_write_spans(project_name, spans, retry, timeout)

        gapic_api.batch_write_spans.assert_called_with(
            name=project_name,
            spans=spans_pb_list,
            retry=retry,
            timeout=timeout)

    def test_create_span_default(self):
        from google.cloud.trace_v2.gapic import trace_service_client
        from google.cloud.trace._gapic import _dict_mapping_to_pb
        from google.cloud._helpers import _datetime_to_pb_timestamp

        gapic_api = mock.Mock(spec=trace_service_client.TraceServiceClient)
        api = self._make_one(gapic_api, None)
        api.create_span(
            name=self.span_name,
            span_id=self.span_id,
            display_name=_str_to_truncatablestr(self.display_name),
            start_time=self.start_time,
            end_time=self.end_time)

        display_name_pb = _dict_mapping_to_pb(
            _str_to_truncatablestr(self.display_name), 'TruncatableString')
        start_time_pb = _datetime_to_pb_timestamp(self.start_time)
        end_time_pb = _datetime_to_pb_timestamp(self.end_time)

        gapic_api.create_span.assert_called_with(
            name=self.span_name,
            span_id=self.span_id,
            display_name=display_name_pb,
            start_time=start_time_pb,
            end_time=end_time_pb,
            parent_span_id=None,
            attributes=None,
            stack_trace=None,
            time_events=None,
            links=None,
            status=None,
            same_process_as_parent_span=None,
            child_span_count=None)

    def test_create_span_explicit(self):
        from google.cloud._helpers import _datetime_to_pb_timestamp
        from google.cloud.trace._gapic import (
            _dict_mapping_to_pb,
            _span_attrs_to_pb,
            _status_mapping_to_pb,
            _value_to_pb)
        from google.cloud.trace_v2.gapic import trace_service_client

        gapic_api = mock.Mock(spec=trace_service_client.TraceServiceClient)
        api = self._make_one(gapic_api, None)
        api.create_span(
            name=self.span_name,
            span_id=self.span_id,
            display_name=_str_to_truncatablestr(self.display_name),
            start_time=self.start_time,
            end_time=self.end_time,
            parent_span_id=self.parent_span_id,
            attributes=self.attributes,
            stack_trace=self.stack_trace,
            time_events=self.time_events,
            links=self.links,
            status=self.status,
            same_process_as_parent_span=self.same_process_as_parent_span,
            child_span_count=self.child_span_count)

        display_name_pb = _dict_mapping_to_pb(
            _str_to_truncatablestr(self.display_name), 'TruncatableString')
        start_time_pb = _datetime_to_pb_timestamp(self.start_time)
        end_time_pb = _datetime_to_pb_timestamp(self.end_time)
        attributes_pb = _span_attrs_to_pb(self.attributes, 'Attributes')
        stack_trace_pb = _dict_mapping_to_pb(self.stack_trace, 'StackTrace')
        time_events_pb = _span_attrs_to_pb(self.time_events, 'TimeEvents')
        links_pb = _span_attrs_to_pb(self.links, 'Links')
        status_pb = _status_mapping_to_pb(self.status)
        same_process_as_parent_span_pb = _value_to_pb(
            self.same_process_as_parent_span, 'BoolValue')
        child_span_count_pb = _value_to_pb(
            self.child_span_count, 'Int32Value')

        gapic_api.create_span.assert_called_with(
            name=self.span_name,
            span_id=self.span_id,
            display_name=display_name_pb,
            start_time=start_time_pb,
            end_time=end_time_pb,
            parent_span_id=self.parent_span_id,
            attributes=attributes_pb,
            stack_trace=stack_trace_pb,
            time_events=time_events_pb,
            links=links_pb,
            status=status_pb,
            same_process_as_parent_span=same_process_as_parent_span_pb,
            child_span_count=child_span_count_pb)


class Test_make_trace_api(unittest.TestCase):

    def _call_fut(self, client):
        from google.cloud.trace._gapic import make_trace_api

        return make_trace_api(client)

    def test_it(self):
        from google.cloud.trace._gapic import _TraceAPI
        from google.cloud._http import DEFAULT_USER_AGENT

        credentials = object()
        client = mock.Mock(_credentials=credentials, spec=['_credentials'])
        generated_api_kwargs = []
        generated = object()

        def generated_api(**kwargs):
            generated_api_kwargs.append(kwargs)
            return generated

        host = 'foo.apis.invalid'
        generated_api.SERVICE_ADDRESS = host

        patch_api = mock.patch(
            'google.cloud.trace._gapic.trace_service_client.TraceServiceClient',
            new=generated_api)

        with patch_api:
            trace_api = self._call_fut(client)

        self.assertEqual(len(generated_api_kwargs), 1)

        self.assertIsInstance(trace_api, _TraceAPI)
        self.assertIs(trace_api._gapic_api, generated)
        self.assertIs(trace_api.client, client)
