import yaml
from rstream import Consumer, AMQPMessage, ConsumerOffsetSpecification, OffsetType, MessageContext
import constants
from dto.annotation_created_message import AnnotationCreatedMessage
from utils import Dotdict


def main():
    with open(constants.CONFIG_FILE, "r") as f:
        config_dict = yaml.safe_load(f)
        d_config = Dotdict(config_dict)
        queue_config = Dotdict(d_config.queue)

    try:
        with open(constants.OFFSET_FILE, 'r') as f:
            offset_dict = yaml.safe_load(f)
            offset_queue = offset_dict['offset_queue']
            offset_confirmed_queue = offset_dict['offset_confirmed_queue']
    except (FileNotFoundError, ValueError):
        with open(constants.OFFSET_FILE, 'w') as f:
            f.writelines(['offset_queue: 0',
                          'offset_confirmed_queue: 0'])

    command_consumer = Consumer(
        host=queue_config.host,
        port=queue_config.port,
        username=queue_config.consumer_user,
        password=queue_config.consumer_pw
    )

    def on_message(message: AMQPMessage, context: MessageContext, is_seed: bool):
        annotation_message = AnnotationCreatedMessage(message.body)
        print(f'Received: {annotation_message}')
        save_folder = constants.data_seeds_dir if is_seed else constants.data_rabbit_dir
        annotation_message.save_annotation(save_folder)

    command_consumer.start()
    command_consumer.subscribe(stream=constants.ANNOTATIONS_QUEUE, callback=lambda msg, context: on_message(msg, context, is_seed=True),
                               offset_specification=ConsumerOffsetSpecification(OffsetType.OFFSET, offset_queue))

    command_consumer.subscribe(stream=constants.ANNOTATIONS_CONFIRMED_QUEUE, callback=lambda msg, context: on_message(msg, context, is_seed=False),
                               offset_specification=ConsumerOffsetSpecification(OffsetType.OFFSET, offset_confirmed_queue))


if __name__ == '__main__':
    main()