# Copyright 2022 The Pigweed Authors
#
# 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
#
#     https://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.
"""Cross-language pw_transfer tests that are as small/fast as possible.

Usage:

   bazel run pw_transfer/integration_test:cross_language_small_test

Command-line arguments must be provided after a double-dash:

   bazel run pw_transfer/integration_test:cross_language_small_test -- \
       --server-port 3304

Which tests to run can be specified as command-line arguments:

  bazel run pw_transfer/integration_test:cross_language_small_test -- \
      SmallTransferIntegrationTest.test_single_byte_client_write_1_java

"""

import itertools
from parameterized import parameterized

from pigweed.pw_transfer.integration_test import config_pb2
import test_fixture
from test_fixture import TransferIntegrationTestHarness

_ALL_LANGUAGES = ("cpp", "java", "python")
_ALL_VERSIONS = (
    config_pb2.TransferAction.ProtocolVersion.V1,
    config_pb2.TransferAction.ProtocolVersion.V2,
)
_ALL_LANGUAGES_AND_VERSIONS = tuple(
    itertools.product(_ALL_LANGUAGES, _ALL_VERSIONS)
)


class SmallTransferIntegrationTest(test_fixture.TransferIntegrationTest):
    # Each set of transfer tests uses a different client/server port pair to
    # allow tests to be run in parallel.
    HARNESS_CONFIG = TransferIntegrationTestHarness.Config(
        server_port=3302, client_port=3303
    )

    @parameterized.expand(_ALL_LANGUAGES_AND_VERSIONS)
    def test_empty_client_write(self, client_type, protocol_version):
        payload = b""
        config = self.default_config()
        resource_id = 5

        # Packet drops can cause the resource ID for this to be opened/closed
        # multiple times due to the zero-size transfer. Use a
        # permanent_resource_id so the retry process can succeed and the harness
        # won't flake.
        self.do_single_write(
            client_type,
            config,
            resource_id,
            payload,
            protocol_version,
            permanent_resource_id=True,
        )

    @parameterized.expand(_ALL_LANGUAGES_AND_VERSIONS)
    def test_null_byte_client_write(self, client_type, protocol_version):
        payload = b"\0"
        config = self.default_config()
        resource_id = 5
        self.do_single_write(
            client_type, config, resource_id, payload, protocol_version
        )

    @parameterized.expand(_ALL_LANGUAGES_AND_VERSIONS)
    def test_single_byte_client_write(self, client_type, protocol_version):
        payload = b"?"
        config = self.default_config()
        resource_id = 5
        self.do_single_write(
            client_type, config, resource_id, payload, protocol_version
        )

    @parameterized.expand(_ALL_LANGUAGES_AND_VERSIONS)
    def test_small_client_write(self, client_type, protocol_version):
        payload = b"some data"
        config = self.default_config()
        resource_id = 5
        self.do_single_write(
            client_type, config, resource_id, payload, protocol_version
        )

    @parameterized.expand(_ALL_LANGUAGES_AND_VERSIONS)
    def test_empty_client_read(self, client_type, protocol_version):
        payload = b""
        config = self.default_config()
        resource_id = 5
        self.do_single_read(
            client_type, config, resource_id, payload, protocol_version
        )

    @parameterized.expand(_ALL_LANGUAGES_AND_VERSIONS)
    def test_null_byte_client_read(self, client_type, protocol_version):
        payload = b"\0"
        config = self.default_config()
        resource_id = 5
        self.do_single_read(
            client_type, config, resource_id, payload, protocol_version
        )

    @parameterized.expand(_ALL_LANGUAGES_AND_VERSIONS)
    def test_single_byte_client_read(self, client_type, protocol_version):
        payload = b"?"
        config = self.default_config()
        resource_id = 5
        self.do_single_read(
            client_type, config, resource_id, payload, protocol_version
        )

    @parameterized.expand(_ALL_LANGUAGES_AND_VERSIONS)
    def test_small_client_read(self, client_type, protocol_version):
        payload = b"some data"
        config = self.default_config()
        resource_id = 5
        self.do_single_read(
            client_type, config, resource_id, payload, protocol_version
        )


if __name__ == '__main__':
    test_fixture.run_tests_for(SmallTransferIntegrationTest)