import asyncio

class NGServer:
    def __init__(self):
        self.incoming_queue = asyncio.Queue()
        self.outgoing_queue = asyncio.Queue()
        self.client_reader = None
        self.client_writer = None

    async def handle_client(self, reader, writer):
        self.client_reader = reader
        self.client_writer = writer
        while True:
            data = await reader.read(1024)
            if not data:
                writer.close()
                break
            await self.incoming_queue.put(data)

    async def handle_incoming(self, reader, writer):
        while True:
            data = await self.incoming_queue.get()
            writer.write(data)
            await writer.drain()

    async def handle_outgoing(self, reader, writer):
        while True:
            data = await self.outgoing_queue.get()
            writer.write(data)
            await writer.drain()

    async def read_from_server(self):
        while True:
            data = await self.client_reader.read(1024)
            if not data:
                self.client_writer.close()
                break
            await self.outgoing_queue.put(data)

    async def start_server(self):
        server = await asyncio.start_server(self.handle_client, host='localhost', port=8000)
        async with server:
            await server.serve_forever()

    async def start_incoming_server(self):
        server = await asyncio.start_server(self.handle_incoming, host='localhost', port=8001)
        async with server:
            await server.serve_forever()

    async def start_outgoing_server(self):
        server = await asyncio.start_server(self.handle_outgoing, host='localhost', port=8002)
        async with server:
            await server.serve_forever()

async def do_async_stuff(ng):
    await asyncio.gather(ng.start_server(),ng.start_queue_server())


async def main():
    """
    In this code, we're creating and running four separate coroutines:

    1. start_server
    2. start_incoming_server
    3. start_outgoing_server
    4. read_from_server. 

    We're also creating separate tasks for handling incoming and
    outgoing data and adding them to the tasks list.

    """
    ng = NGServer()
    await asyncio.gather(
        ng.start_server(),
        ng.start_incoming_server(),
        ng.start_outgoing_server(),
    )
    """ 
    tasks = [
        ng.read_from_server(),
        ng.handle_incoming(),
        ng.handle_outgoing(),
    ]
    await asyncio.gather(*tasks)
    """

def example():
    """ """
# asyncio.run(main())