from __future__ import unicode_literals
import boto
import six

import sure  # noqa

from boto.exception import BotoServerError
from moto import mock_sns
from moto.sns.models import DEFAULT_TOPIC_POLICY, DEFAULT_EFFECTIVE_DELIVERY_POLICY, DEFAULT_PAGE_SIZE


@mock_sns
def test_create_and_delete_topic():
    conn = boto.connect_sns()
    conn.create_topic("some-topic")

    topics_json = conn.get_all_topics()
    topics = topics_json["ListTopicsResponse"]["ListTopicsResult"]["Topics"]
    topics.should.have.length_of(1)
    topics[0]['TopicArn'].should.equal(
        "arn:aws:sns:{0}:123456789012:some-topic"
        .format(conn.region.name)
    )

    # Delete the topic
    conn.delete_topic(topics[0]['TopicArn'])

    # And there should now be 0 topics
    topics_json = conn.get_all_topics()
    topics = topics_json["ListTopicsResponse"]["ListTopicsResult"]["Topics"]
    topics.should.have.length_of(0)


@mock_sns
def test_get_missing_topic():
    conn = boto.connect_sns()
    conn.get_topic_attributes.when.called_with("a-fake-arn").should.throw(BotoServerError)


@mock_sns
def test_create_topic_in_multiple_regions():
    for region in ['us-west-1', 'us-west-2']:
        conn = boto.sns.connect_to_region(region)
        conn.create_topic("some-topic")
        list(conn.get_all_topics()["ListTopicsResponse"]["ListTopicsResult"]["Topics"]).should.have.length_of(1)

@mock_sns
def test_topic_corresponds_to_region():
    for region in ['us-east-1', 'us-west-2']:
        conn = boto.sns.connect_to_region(region)
        conn.create_topic("some-topic")
        topics_json = conn.get_all_topics()
        topic_arn = topics_json["ListTopicsResponse"]["ListTopicsResult"]["Topics"][0]['TopicArn']
        topic_arn.should.equal("arn:aws:sns:{0}:123456789012:some-topic".format(region))

@mock_sns
def test_topic_attributes():
    conn = boto.connect_sns()
    conn.create_topic("some-topic")

    topics_json = conn.get_all_topics()
    topic_arn = topics_json["ListTopicsResponse"]["ListTopicsResult"]["Topics"][0]['TopicArn']

    attributes = conn.get_topic_attributes(topic_arn)['GetTopicAttributesResponse']['GetTopicAttributesResult']['Attributes']
    attributes["TopicArn"].should.equal(
        "arn:aws:sns:{0}:123456789012:some-topic"
        .format(conn.region.name)
    )
    attributes["Owner"].should.equal(123456789012)
    attributes["Policy"].should.equal(DEFAULT_TOPIC_POLICY)
    attributes["DisplayName"].should.equal("")
    attributes["SubscriptionsPending"].should.equal(0)
    attributes["SubscriptionsConfirmed"].should.equal(0)
    attributes["SubscriptionsDeleted"].should.equal(0)
    attributes["DeliveryPolicy"].should.equal("")
    attributes["EffectiveDeliveryPolicy"].should.equal(DEFAULT_EFFECTIVE_DELIVERY_POLICY)

    # boto can't handle prefix-mandatory strings:
    # i.e. unicode on Python 2 -- u"foobar"
    # and bytes on Python 3 -- b"foobar"
    if six.PY2:
        policy = {b"foo": b"bar"}
        displayname = b"My display name"
        delivery = {b"http": {b"defaultHealthyRetryPolicy": {b"numRetries": 5}}}
    else:
        policy = {u"foo": u"bar"}
        displayname = u"My display name"
        delivery = {u"http": {u"defaultHealthyRetryPolicy": {u"numRetries": 5}}}
    conn.set_topic_attributes(topic_arn, "Policy", policy)
    conn.set_topic_attributes(topic_arn, "DisplayName", displayname)
    conn.set_topic_attributes(topic_arn, "DeliveryPolicy", delivery)

    attributes = conn.get_topic_attributes(topic_arn)['GetTopicAttributesResponse']['GetTopicAttributesResult']['Attributes']
    attributes["Policy"].should.equal("{'foo': 'bar'}")
    attributes["DisplayName"].should.equal("My display name")
    attributes["DeliveryPolicy"].should.equal("{'http': {'defaultHealthyRetryPolicy': {'numRetries': 5}}}")

@mock_sns
def test_topic_paging():
    conn = boto.connect_sns()
    for index in range(DEFAULT_PAGE_SIZE + int(DEFAULT_PAGE_SIZE / 2)):
        conn.create_topic("some-topic_" + str(index))

    topics_json = conn.get_all_topics()
    topics_list = topics_json["ListTopicsResponse"]["ListTopicsResult"]["Topics"]
    next_token = topics_json["ListTopicsResponse"]["ListTopicsResult"]["NextToken"]

    len(topics_list).should.equal(DEFAULT_PAGE_SIZE)
    next_token.should.equal(DEFAULT_PAGE_SIZE)

    topics_json = conn.get_all_topics(next_token=next_token)
    topics_list = topics_json["ListTopicsResponse"]["ListTopicsResult"]["Topics"]
    next_token = topics_json["ListTopicsResponse"]["ListTopicsResult"]["NextToken"]

    topics_list.should.have.length_of(int(DEFAULT_PAGE_SIZE / 2))
    next_token.should.equal(None)