from unittest import TestCase
from mockredis import MockRedis
from ..test_helper import *
from cartodb_services.metrics.quota import QuotaChecker
from cartodb_services.metrics import RoutingConfig
from datetime import datetime


class RoutingConfigMock(object):

    def __init__(self, **kwargs):
        self.__dict__ = kwargs


class TestQuotaChecker(TestCase):

    def setUp(self):
        self.username = 'my_test_user'
        self.period_end_date = datetime.today()
        self.service_type = 'routing_mapzen'
        self.redis_key = 'user:{0}:{1}:success_responses:{2}{3}'.format(
            self.username,
            self.service_type,
            self.period_end_date.year,
            self.period_end_date.strftime('%m')
        )

    def test_routing_quota_check_passes_when_enough_quota(self):
        user_service_config = RoutingConfigMock(
            username = self.username,
            organization = None,
            service_type = self.service_type,
            routing_quota = 1000,
            period_end_date = datetime.today(),
            soft_limit = False
        )
        redis_conn = MockRedis()
        redis_conn.zincrby(self.redis_key, self.period_end_date.strftime('%d'), 999)
        assert QuotaChecker(user_service_config, redis_conn).check() == True

    def test_routing_quota_check_fails_when_quota_exhausted(self):
        user_service_config = RoutingConfigMock(
            username = self.username,
            organization = None,
            service_type = self.service_type,
            routing_quota = 1000,
            period_end_date = datetime.today(),
            soft_limit = False
        )
        redis_conn = MockRedis()
        redis_conn.zincrby(self.redis_key, self.period_end_date.strftime('%d'), 1001)
        checker = QuotaChecker(user_service_config, redis_conn)
        assert checker.check() == False

    def test_routing_quota_check_fails_right_in_the_limit(self):
        """
        I have 1000 credits and I just spent 1000 today. I should not pass
        the check to perform the 1001th routing operation.
        """
        user_service_config = RoutingConfigMock(
            username = self.username,
            organization = None,
            service_type = self.service_type,
            routing_quota = 1000,
            period_end_date = datetime.today(),
            soft_limit = False
        )
        redis_conn = MockRedis()
        redis_conn.zincrby(self.redis_key, self.period_end_date.strftime('%d'), 1000)
        checker = QuotaChecker(user_service_config, redis_conn)
        assert checker.check() == False

    def test_routing_quota_check_passes_if_no_quota_but_soft_limit(self):
        user_service_config = RoutingConfigMock(
            username = self.username,
            organization = None,
            service_type = self.service_type,
            routing_quota = 1000,
            period_end_date = datetime.today(),
            soft_limit = True
        )
        redis_conn = MockRedis()
        redis_conn.zincrby(self.redis_key, self.period_end_date.strftime('%d'), 1001)
        checker = QuotaChecker(user_service_config, redis_conn)
        assert checker.check() == True