"""Tests for Handlers."""

import json
from unittest.mock import MagicMock
from unittest.mock import patch

from oto import response
from oto import status
from oto.adaptors.flask import flaskify
import pytest

from notifications import api, handlers


@patch(
    'notifications.logic.notifications.unsubscribe',
    return_value=flaskify(response.Response()))
def test_unsubscribe(mock_unsubscribe, fixture_client):
    """Test unsubscribe response."""
    user_id = 'oa:123'
    feed_name = 'label_analytics_digest'
    feed_id = 'vendor_123'
    token = 'e3f848d9c499429de544fc6b57af3d2ec61021ac'

    url = '/unsubscribe'
    url += '?user_id={0}'.format(user_id)
    url += '&feed_name={0}'.format(feed_name)
    url += '&feed_id={0}'.format(feed_id)
    url += '&key={0}'.format(token)

    result = fixture_client.get(url)

    mock_unsubscribe.assert_called_with(
        user_id,
        feed_name,
        feed_id,
        token)
    assert result.status_code == status.OK


@pytest.mark.parametrize('user_id, feed_name, feed_id, token', [
    (
        '',
        'label_analytics_digest',
        'vendor_123',
        'TOKEN'
    ),
    (
        'oa:123',
        '',
        'vendor_123',
        'TOKEN'
    ),
    (
        'oa:123',
        'label_analytics_digest',
        '',
        'TOKEN'
    ),
    (
        'oa:123',
        'label_analytics_digest',
        'vendor_123',
        ''
    )
])
def test_unsubscribe_bad_parameters(
        fixture_client, user_id, feed_name, feed_id, token):
    """Test unsubscribe response when called with bad parameters."""
    url = '/unsubscribe'
    url += '?user_id={0}'.format(user_id)
    url += '&feed_name={0}'.format(feed_name)
    url += '&feed_id={0}'.format(feed_id)
    url += '&key={0}'.format(token)

    result = fixture_client.get(url)

    assert result.status_code == status.BAD_REQUEST


def test_exception_handler():
    """Verify exception_Handler returns 500 status code and json payload."""
    with api.app.app_context():
        with patch('notifications.handlers.g') as mock_g:
            message = (
                'The server encountered an internal error '
                'and was unable to complete your request.')
            mock_error = MagicMock()
            server_response = handlers.exception_handler(mock_error)
            mock_g.log.exception.assert_called_with(mock_error)

            # assert status code is 500
            assert server_response.status_code == 500

            # assert json payload
            response_message = json.loads(server_response.data.decode())
            assert response_message['message'] == message
            assert response_message['code'] == \
                response.error.ERROR_CODE_INTERNAL_ERROR