#!/usr/bin/env python3
# Copyright 2020 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.
"""Tests creating pw_rpc client."""

import unittest

from pw_status import Status

from pw_rpc.internal.packet_pb2 import PacketType, RpcPacket
from pw_rpc import packets

_TEST_IDS = packets.RpcIds(1, 2, 3, 4)
_TEST_STATUS = 321
_TEST_REQUEST = RpcPacket(
    type=PacketType.REQUEST,
    channel_id=_TEST_IDS.channel_id,
    service_id=_TEST_IDS.service_id,
    method_id=_TEST_IDS.method_id,
    call_id=_TEST_IDS.call_id,
    payload=RpcPacket(status=_TEST_STATUS).SerializeToString(),
)
_TEST_RESPONSE = RpcPacket(
    type=PacketType.RESPONSE,
    channel_id=_TEST_IDS.channel_id,
    service_id=_TEST_IDS.service_id,
    method_id=_TEST_IDS.method_id,
    call_id=_TEST_IDS.call_id,
    payload=RpcPacket(status=_TEST_STATUS).SerializeToString(),
)


class PacketsTest(unittest.TestCase):
    """Tests for packet encoding and decoding."""

    def test_encode_request(self):
        data = packets.encode_request(_TEST_IDS, RpcPacket(status=_TEST_STATUS))
        packet = RpcPacket()
        packet.ParseFromString(data)

        self.assertEqual(_TEST_REQUEST, packet)

    def test_encode_response(self):
        data = packets.encode_response(
            _TEST_IDS, RpcPacket(status=_TEST_STATUS)
        )
        packet = RpcPacket()
        packet.ParseFromString(data)

        self.assertEqual(_TEST_RESPONSE, packet)

    def test_encode_cancel(self):
        data = packets.encode_cancel(packets.RpcIds(9, 8, 7, 6))

        packet = RpcPacket()
        packet.ParseFromString(data)

        self.assertEqual(
            packet,
            RpcPacket(
                type=PacketType.CLIENT_ERROR,
                channel_id=9,
                service_id=8,
                method_id=7,
                call_id=6,
                status=Status.CANCELLED.value,
            ),
        )

    def test_encode_client_error(self):
        data = packets.encode_client_error(_TEST_REQUEST, Status.NOT_FOUND)

        packet = RpcPacket()
        packet.ParseFromString(data)

        self.assertEqual(
            packet,
            RpcPacket(
                type=PacketType.CLIENT_ERROR,
                channel_id=_TEST_IDS.channel_id,
                service_id=_TEST_IDS.service_id,
                method_id=_TEST_IDS.method_id,
                call_id=_TEST_IDS.call_id,
                status=Status.NOT_FOUND.value,
            ),
        )

    def test_decode(self):
        self.assertEqual(
            _TEST_REQUEST, packets.decode(_TEST_REQUEST.SerializeToString())
        )

    def test_for_server(self):
        self.assertTrue(packets.for_server(_TEST_REQUEST))
        self.assertFalse(packets.for_server(_TEST_RESPONSE))


if __name__ == '__main__':
    unittest.main()