import pytest

from contextlib import contextmanager
from mock import patch
from moto import mock_s3
import boto

from app import config_provider
from storage import CloudFrontedS3Storage, StorageContext
from util.ipresolver import IPResolver
from util.ipresolver.test.test_ipresolver import test_aws_ip, aws_ip_range_data, test_ip_range_cache
from test.fixtures import *

_TEST_CONTENT = os.urandom(1024)
_TEST_BUCKET = 'some_bucket'
_TEST_USER = 'someuser'
_TEST_PASSWORD = 'somepassword'
_TEST_PATH = 'some/cool/path'

@pytest.fixture(params=[True, False])
def ipranges_populated(request):
  return request.param

@pytest.fixture()
def test_empty_ip_range_cache(empty_range_data):
  sync_token = empty_range_data['syncToken']
  all_amazon, regions = IPResolver._parse_amazon_ranges(empty_range_data)
  fake_cache = {
    'sync_token': sync_token,
    'all_amazon': all_amazon,
    'regions': regions,
  }
  return fake_cache

@pytest.fixture()
def empty_range_data():
  empty_range_data = {
    'syncToken': 123456789,
    'prefixes': [],
  }
  return empty_range_data

@mock_s3
def test_direct_download(test_aws_ip, test_empty_ip_range_cache, test_ip_range_cache, aws_ip_range_data, ipranges_populated, app):
  ipresolver = IPResolver(app)
  if ipranges_populated:

    with patch.dict('util.ipresolver.CACHE', test_ip_range_cache if ipranges_populated else test_empty_ip_range_cache):
      context = StorageContext('nyc', None, None, config_provider, ipresolver)

      # Create a test bucket and put some test content.
      boto.connect_s3().create_bucket(_TEST_BUCKET)

      engine = CloudFrontedS3Storage(context, 'cloudfrontdomain', 'keyid', 'test/data/test.pem', 'some/path',
                                    _TEST_BUCKET, _TEST_USER, _TEST_PASSWORD)
      engine.put_content(_TEST_PATH, _TEST_CONTENT)
      assert engine.exists(_TEST_PATH)

      # Request a direct download URL for a request from a known AWS IP, and ensure we are returned an S3 URL.
      assert 's3.amazonaws.com' in engine.get_direct_download_url(_TEST_PATH, test_aws_ip)

      if ipranges_populated:
        # Request a direct download URL for a request from a non-AWS IP, and ensure we are returned a CloudFront URL.
        assert 'cloudfrontdomain' in engine.get_direct_download_url(_TEST_PATH, '1.2.3.4')
      else:
        # Request a direct download URL for a request from a non-AWS IP, but since IP Ranges isn't populated, we still
        # get back an S3 URL.
        assert 's3.amazonaws.com' in engine.get_direct_download_url(_TEST_PATH, '1.2.3.4')

@mock_s3
def test_direct_download_no_ip(test_aws_ip, aws_ip_range_data, ipranges_populated, app):
  ipresolver = IPResolver(app)
  context = StorageContext('nyc', None, None, config_provider, ipresolver)

  # Create a test bucket and put some test content.
  boto.connect_s3().create_bucket(_TEST_BUCKET)

  engine = CloudFrontedS3Storage(context, 'cloudfrontdomain', 'keyid', 'test/data/test.pem', 'some/path',
                                _TEST_BUCKET, _TEST_USER, _TEST_PASSWORD)
  engine.put_content(_TEST_PATH, _TEST_CONTENT)
  assert engine.exists(_TEST_PATH)
  assert 's3.amazonaws.com' in engine.get_direct_download_url(_TEST_PATH)