# 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.

from enum import Enum

import pytest

try:
    import grpc  # noqa: F401
except ImportError:
    pytest.skip("No GRPC", allow_module_level=True)


from google.api_core.gapic_v1 import routing_header


def test_to_routing_header():
    params = [("name", "meep"), ("book.read", "1")]
    value = routing_header.to_routing_header(params)
    assert value == "name=meep&book.read=1"


def test_to_routing_header_with_slashes():
    params = [("name", "me/ep"), ("book.read", "1&2")]
    value = routing_header.to_routing_header(params)
    assert value == "name=me/ep&book.read=1%262"


def test_enum_fully_qualified():
    class Message:
        class Color(Enum):
            RED = 1
            GREEN = 2
            BLUE = 3

    params = [("color", Message.Color.RED)]
    value = routing_header.to_routing_header(params)
    assert value == "color=Color.RED"
    value = routing_header.to_routing_header(params, qualified_enums=True)
    assert value == "color=Color.RED"


def test_enum_nonqualified():
    class Message:
        class Color(Enum):
            RED = 1
            GREEN = 2
            BLUE = 3

    params = [("color", Message.Color.RED), ("num", 5)]
    value = routing_header.to_routing_header(params, qualified_enums=False)
    assert value == "color=RED&num=5"
    params = {"color": Message.Color.RED, "num": 5}
    value = routing_header.to_routing_header(params, qualified_enums=False)
    assert value == "color=RED&num=5"


def test_to_grpc_metadata():
    params = [("name", "meep"), ("book.read", "1")]
    metadata = routing_header.to_grpc_metadata(params)
    assert metadata == (routing_header.ROUTING_METADATA_KEY, "name=meep&book.read=1")


@pytest.mark.parametrize(
    "key,value,expected",
    [
        ("book.read", "1", "book.read=1"),
        ("name", "me/ep", "name=me/ep"),
        ("\\", "=", "%5C=%3D"),
        (b"hello", "world", "hello=world"),
        ("✔️", "✌️", "%E2%9C%94%EF%B8%8F=%E2%9C%8C%EF%B8%8F"),
    ],
)
def test__urlencode_param(key, value, expected):
    result = routing_header._urlencode_param(key, value)
    assert result == expected


def test__urlencode_param_caching_performance():
    import time

    key = "key" * 100
    value = "value" * 100
    # time with empty cache
    start_time = time.perf_counter()
    routing_header._urlencode_param(key, value)
    duration = time.perf_counter() - start_time
    second_start_time = time.perf_counter()
    routing_header._urlencode_param(key, value)
    second_duration = time.perf_counter() - second_start_time
    # second call should be approximately 10 times faster
    assert second_duration < duration / 10
