from django.test import TestCase

from haystack import connections
from haystack.utils.loading import UnifiedIndex
from test_haystack.discovery.search_indexes import FooIndex

EXPECTED_INDEX_MODEL_COUNT = 6


class ManualDiscoveryTestCase(TestCase):
    def test_discovery(self):
        old_ui = connections["default"].get_unified_index()
        connections["default"]._index = UnifiedIndex()
        ui = connections["default"].get_unified_index()
        self.assertEqual(len(ui.get_indexed_models()), EXPECTED_INDEX_MODEL_COUNT)

        ui.build(indexes=[FooIndex()])

        self.assertListEqual(
            ["discovery.foo"], [str(i._meta) for i in ui.get_indexed_models()]
        )

        ui.build(indexes=[])

        self.assertListEqual([], ui.get_indexed_models())
        connections["default"]._index = old_ui


class AutomaticDiscoveryTestCase(TestCase):
    def test_discovery(self):
        old_ui = connections["default"].get_unified_index()
        connections["default"]._index = UnifiedIndex()
        ui = connections["default"].get_unified_index()
        self.assertEqual(len(ui.get_indexed_models()), EXPECTED_INDEX_MODEL_COUNT)

        # Test exclusions.
        ui.excluded_indexes = ["test_haystack.discovery.search_indexes.BarIndex"]
        ui.build()

        indexed_model_names = [str(i._meta) for i in ui.get_indexed_models()]
        self.assertIn("multipleindex.foo", indexed_model_names)
        self.assertIn("multipleindex.bar", indexed_model_names)
        self.assertNotIn("discovery.bar", indexed_model_names)

        ui.excluded_indexes = [
            "test_haystack.discovery.search_indexes.BarIndex",
            "test_haystack.discovery.search_indexes.FooIndex",
        ]
        ui.build()

        indexed_model_names = [str(i._meta) for i in ui.get_indexed_models()]
        self.assertIn("multipleindex.foo", indexed_model_names)
        self.assertIn("multipleindex.bar", indexed_model_names)
        self.assertListEqual(
            [], [i for i in indexed_model_names if i.startswith("discovery")]
        )
        connections["default"]._index = old_ui