#!/usr/bin/env python3
# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# 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.

# pyre-strict

import asyncio
import unittest
from typing import Any

import thrift.py3.server
from binary.clients import BinaryService
from binary.services import BinaryServiceInterface
from binary.types import Binaries, BinaryUnion
from folly.iobuf import IOBuf
from thrift.py3.client import get_client
from thrift.py3.server import ThriftServer


class BinaryTests(unittest.TestCase):
    def test_various_binary_types(self) -> None:
        val = Binaries(
            no_special_type=b"abcdef",
            iobuf_val=IOBuf(b"mnopqr"),
            iobuf_ptr=IOBuf(b"ghijkl"),
            fbstring=b"stuvwx",
            nonstandard_type=b"yzabcd",
        )
        self.assertEqual(val.no_special_type, b"abcdef")
        self.assertEqual(b"".join(val.iobuf_val), b"mnopqr")
        assert val.iobuf_ptr is not None
        self.assertEqual(b"".join(val.iobuf_ptr), b"ghijkl")
        self.assertEqual(val.fbstring, b"stuvwx")
        self.assertEqual(val.nonstandard_type, b"yzabcd")

    def test_binary_union(self) -> None:
        val = BinaryUnion(iobuf_val=IOBuf(b"mnopqr"))
        self.assertEqual(b"".join(val.iobuf_val), b"mnopqr")


class BinaryHandler(BinaryServiceInterface):
    # pyre-fixme[2]: Parameter must be annotated.
    def __init__(self, unit_test) -> None:
        # pyre-fixme[4]: Attribute must be annotated.
        self.unit_test = unit_test

    async def sendRecvBinaries(self, val: Binaries) -> Binaries:
        self.unit_test.assertEqual(val.no_special_type, b"c1")
        self.unit_test.assertEqual(b"".join(val.iobuf_val), b"c2")
        assert val.iobuf_ptr is not None
        self.unit_test.assertEqual(b"".join(val.iobuf_ptr), b"c3")
        self.unit_test.assertEqual(val.fbstring, b"c4")
        self.unit_test.assertEqual(val.nonstandard_type, b"c5")
        return Binaries(
            no_special_type=b"s1",
            iobuf_val=IOBuf(b"s2"),
            iobuf_ptr=IOBuf(b"s3"),
            fbstring=b"s4",
            nonstandard_type=b"s5",
        )

    async def sendRecvBinary(self, val: bytes) -> bytes:
        self.unit_test.assertEqual(val, b"cv1")
        return b"sv1"

    async def sendRecvIOBuf(self, val: IOBuf) -> IOBuf:
        self.unit_test.assertEqual(b"".join(val), b"cv2")
        return IOBuf(b"sv2")

    async def sendRecvIOBufPtr(self, val: IOBuf) -> IOBuf:
        self.unit_test.assertEqual(b"".join(val), b"cv3")
        return IOBuf(b"sv3")

    async def sendRecvFbstring(self, val: bytes) -> bytes:
        self.unit_test.assertEqual(val, b"cv4")
        return b"sv4"

    async def sendRecvBuffer(self, val: bytes) -> bytes:
        self.unit_test.assertEqual(val, b"cv5")
        return b"sv5"

    async def sendRecBinaryUnion(self, val: BinaryUnion) -> BinaryUnion:
        self.unit_test.assertEqual(b"".join(val.iobuf_val), b"cv6")
        return BinaryUnion(iobuf_val=IOBuf(b"sv6"))


# pyre-fixme[13]: Attribute `serve_task` is never initialized.
class TestServer:
    server: ThriftServer
    serve_task: asyncio.Task

    def __init__(self, *, ip: str, handler: thrift.py3.server.ServiceInterface) -> None:
        self.server = ThriftServer(handler, ip=ip, path=None)

    async def __aenter__(self) -> thrift.py3.server.SocketAddress:
        self.serve_task = asyncio.get_event_loop().create_task(self.server.serve())
        return await self.server.get_address()

    # pyre-fixme[2]: Parameter must be annotated.
    async def __aexit__(self, *exc_info) -> None:
        self.server.stop()
        await self.serve_task


class ClientBinaryServerTests(unittest.TestCase):
    def test_send_recv(self) -> None:
        loop = asyncio.get_event_loop()

        async def inner_test() -> None:
            async with TestServer(handler=BinaryHandler(self), ip="::1") as sa:
                ip, port = sa.ip, sa.port
                assert ip and port
                async with get_client(BinaryService, host=ip, port=port) as client:
                    # pyre-fixme[33]: Given annotation cannot be `Any`.
                    val: Any
                    val = await client.sendRecvBinaries(
                        Binaries(
                            no_special_type=b"c1",
                            iobuf_val=IOBuf(b"c2"),
                            iobuf_ptr=IOBuf(b"c3"),
                            fbstring=b"c4",
                            nonstandard_type=b"c5",
                        )
                    )
                    self.assertEqual(val.no_special_type, b"s1")
                    self.assertEqual(b"".join(val.iobuf_val), b"s2")
                    assert val.iobuf_ptr is not None
                    self.assertEqual(b"".join(val.iobuf_ptr), b"s3")
                    self.assertEqual(val.fbstring, b"s4")
                    self.assertEqual(val.nonstandard_type, b"s5")

                    val = await client.sendRecvBinary(b"cv1")
                    self.assertEqual(val, b"sv1")

                    val = await client.sendRecvIOBuf(IOBuf(b"cv2"))
                    self.assertEqual(b"".join(val), b"sv2")

                    val = await client.sendRecvIOBufPtr(IOBuf(b"cv3"))
                    self.assertEqual(b"".join(val), b"sv3")

                    val = await client.sendRecvFbstring(b"cv4")
                    self.assertEqual(val, b"sv4")

                    val = await client.sendRecvBuffer(b"cv5")
                    self.assertEqual(val, b"sv5")

                    bu = BinaryUnion(iobuf_val=IOBuf(b"cv6"))
                    val = await client.sendRecBinaryUnion(bu)
                    self.assertEqual(b"".join(val.iobuf_val), b"sv6")

        loop.run_until_complete(inner_test())