import pytest
from case import Mock, sentinel, skip
from celery.app import backends
from celery.backends import elasticsearch as module
from celery.backends.elasticsearch import ElasticsearchBackend
from celery.exceptions import ImproperlyConfigured


@skip.unless_module('elasticsearch')
class test_ElasticsearchBackend:

    def setup(self):
        self.backend = ElasticsearchBackend(app=self.app)

    def test_init_no_elasticsearch(self):
        prev, module.elasticsearch = module.elasticsearch, None
        try:
            with pytest.raises(ImproperlyConfigured):
                ElasticsearchBackend(app=self.app)
        finally:
            module.elasticsearch = prev

    def test_get(self):
        x = ElasticsearchBackend(app=self.app)
        x._server = Mock()
        x._server.get = Mock()
        # expected result
        r = dict(found=True, _source={sentinel.task_id: sentinel.result})
        x._server.get.return_value = r
        dict_result = x.get(sentinel.task_id)

        assert dict_result == sentinel.result
        x._server.get.assert_called_once_with(
            doc_type=x.doc_type,
            id=sentinel.task_id,
            index=x.index,
        )

    def test_get_none(self):
        x = ElasticsearchBackend(app=self.app)
        x._server = Mock()
        x._server.get = Mock()
        x._server.get.return_value = sentinel.result
        none_result = x.get(sentinel.task_id)

        assert none_result is None
        x._server.get.assert_called_once_with(
            doc_type=x.doc_type,
            id=sentinel.task_id,
            index=x.index,
        )

    def test_delete(self):
        x = ElasticsearchBackend(app=self.app)
        x._server = Mock()
        x._server.delete = Mock()
        x._server.delete.return_value = sentinel.result

        assert x.delete(sentinel.task_id) is None
        x._server.delete.assert_called_once_with(
            doc_type=x.doc_type,
            id=sentinel.task_id,
            index=x.index,
        )

    def test_backend_by_url(self, url='elasticsearch://localhost:9200/index'):
        backend, url_ = backends.by_url(url, self.app.loader)

        assert backend is ElasticsearchBackend
        assert url_ == url

    def test_backend_params_by_url(self):
        url = 'elasticsearch://localhost:9200/index/doc_type'
        with self.Celery(backend=url) as app:
            x = app.backend

            assert x.index == 'index'
            assert x.doc_type == 'doc_type'
            assert x.scheme == 'elasticsearch'
            assert x.host == 'localhost'
            assert x.port == 9200