import argparse
import asyncio
import gc
import os.path
import socket as stdsock


PRINT = 0


async def echo_client_streams(reader, writer):
    sock = writer.get_extra_info('socket')
    try:
        sock.setsockopt(
            stdsock.IPPROTO_TCP, stdsock.TCP_NODELAY, 1)
    except (OSError, NameError):
        pass
    if PRINT:
        print('Connection from', sock.getpeername())
    while True:
        data = await reader.readline()
        if not data:
            break
        writer.write(data)
    if PRINT:
        print('Connection closed')
    writer.close()


async def print_debug(loop):
    while True:
        print(chr(27) + "[2J")  # clear screen
        loop.print_debug_info()
        await asyncio.sleep(0.5)


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('--uvloop', default=False, action='store_true')
    parser.add_argument('--addr', default='127.0.0.1:25000', type=str)
    parser.add_argument('--print', default=False, action='store_true')
    args = parser.parse_args()

    if args.uvloop:
        import uvloop
        loop = uvloop.new_event_loop()
        print('using UVLoop')
    else:
        loop = asyncio.new_event_loop()
        print('using asyncio loop')

    asyncio.set_event_loop(loop)
    loop.set_debug(False)

    if args.print:
        PRINT = 1

    if hasattr(loop, 'print_debug_info'):
        loop.create_task(print_debug(loop))
        PRINT = 0

    unix = False
    if args.addr.startswith('file:'):
        unix = True
        addr = args.addr[5:]
        if os.path.exists(addr):
            os.remove(addr)
    else:
        addr = args.addr.split(':')
        addr[1] = int(addr[1])
        addr = tuple(addr)

    print('readline performance test')
    print(f'serving on: {addr}')

    print('using asyncio/streams')
    if unix:
        coro = asyncio.start_unix_server(echo_client_streams,
                                         addr, limit=256000)
    else:
        coro = asyncio.start_server(echo_client_streams,
                                    *addr, limit=256000)
    srv = loop.run_until_complete(coro)

    try:
        loop.run_forever()
    finally:
        if hasattr(loop, 'print_debug_info'):
            gc.collect()
            print(chr(27) + "[2J")
            loop.print_debug_info()

        loop.close()