from asyncio import get_event_loop, sleep, wait, Queue

async def push(loop, queues):
    print("PUSH")
    while all([queue for queue in queues]):
        send = queues.get("push")
        receive = queues.get("pull")
        event = await send.get()
        print("PUSH", event)
        assert isinstance(event, tuple), f"Expected tuple: {event}"
        if len(event) == 2:
            error, response = event
            if error:
                break

        elif len(event) == 4:
            where, context, old_value, new_value = event
            await receive.put(event)

        await sleep(0)

    return

async def pull(loop, queues):
    plugins = dict()
    print("PULL")
    while all([queue for queue in queues]):
        hook = queues.get("hook")
        send = queues.get("push")
        receive = queues.get("pull")
        while not hook.empty():
            plugin = await hook.get()
            print("PULL", plugin)
            assert callable(plugin), f"Expected function: {plugin}"
            plugins[plugin.__name__.lower()] = plugin

        event = await receive.get()
        print("PULL", event)
        assert isinstance(event, tuple), f"Expected tuple: {event}"
        assert len(event) == 4, f"Invalid format: {event}"
        where, context, old_value, new_value = event

        stop = False
        for plugin_name, plugin in plugins.items():
            if plugin_name == where:
                result = plugin(context, old_value, new_value)
                assert isinstance(result, tuple), f"Expected tuple: {result}"
                assert len(result) == 2, f"Invalid format: {result}"
                await send.put(result)
                error, response = result
                if error:
                    stop = True
                    break

        if stop:
            break

        await sleep(0)

    return

def test(context, old_value, new_value):
    status = old_value == new_value
    return True, status

async def main(loop):
    tasks = list()
    queues = dict()
    queues["hook"] = Queue()
    queues["push"] = Queue()
    queues["pull"] = Queue()

    await queues["hook"].put(test)
    await queues["push"].put(("test", "change", None, True))

    tasks.append(loop.create_task(pull(loop, queues)))
    tasks.append(loop.create_task(push(loop, queues)))
    await wait(tasks)
    loop.stop()

loop = get_event_loop()
try:
    loop.create_task(main(loop))
    loop.run_forever()
finally:
    loop.close()