from requests.exceptions import HTTPError
from django_q.conf import Conf
from django_q.brokers import Broker
from iron_mq import IronMQ


class IronMQBroker(Broker):
    def enqueue(self, task):
        return self.connection.post(task)['ids'][0]

    def dequeue(self):
            timeout = Conf.RETRY or None
            tasks = self.connection.get(timeout=timeout, wait=1, max=Conf.BULK)['messages']
            if tasks:
                return [(t['id'], t['body']) for t in tasks]

    def ping(self):
        return self.connection.name == self.list_key

    def info(self):
        return 'IronMQ'

    def queue_size(self):
        return self.connection.size()

    def delete_queue(self):
        try:
            return self.connection.delete_queue()['msg']
        except HTTPError:
            return False

    def purge_queue(self):
        return self.connection.clear()

    def delete(self, task_id):
        try:
            return self.connection.delete(task_id)['msg']
        except HTTPError:
            return False

    def fail(self, task_id):
        self.delete(task_id)

    def acknowledge(self, task_id):
        return self.delete(task_id)

    @staticmethod
    def get_connection(list_key=Conf.PREFIX):
        ironmq = IronMQ(name=None, **Conf.IRON_MQ)
        return ironmq.queue(queue_name=list_key)