"""Tests for RelationRepository."""
import pytest
import pytest_asyncio
from basic_memory.models import Entity, Relation
from basic_memory.repository.relation_repository import RelationRepository

pytestmark = pytest.mark.asyncio


class TestRelationRepository:
    @pytest_asyncio.fixture(scope="function")
    async def related_entity(self, entity_repository):
        """Create a second entity for testing relations"""
        entity_data = {
            'id': '20240102-related',
            'name': 'Related Entity',
            'entity_type': 'test',
            'description': 'A related test entity',
            'references': ''
        }
        return await entity_repository.create(entity_data)

    @pytest_asyncio.fixture(scope="function")
    async def sample_relation(
        self,
        relation_repository: RelationRepository,
        sample_entity: Entity,
        related_entity: Entity
    ):
        """Create a sample relation for testing"""
        relation_data = {
            'from_id': sample_entity.id,
            'to_id': related_entity.id,
            'relation_type': 'test_relation',
            'context': 'test-context'
        }
        return await relation_repository.create(relation_data)

    @pytest_asyncio.fixture(scope="function")
    async def multiple_relations(
        self,
        relation_repository: RelationRepository,
        sample_entity: Entity,
        related_entity: Entity
    ):
        """Create multiple relations for testing"""
        relations_data = [
            {
                'from_id': sample_entity.id,
                'to_id': related_entity.id,
                'relation_type': 'relation_one',
                'context': 'context_one'
            },
            {
                'from_id': sample_entity.id,
                'to_id': related_entity.id,
                'relation_type': 'relation_two',
                'context': 'context_two'
            },
            {
                'from_id': related_entity.id,
                'to_id': sample_entity.id,
                'relation_type': 'relation_one',
                'context': 'context_three'
            }
        ]
        return [await relation_repository.create(data) for data in relations_data]

    async def test_create_relation(
        self,
        relation_repository: RelationRepository,
        sample_entity: Entity,
        related_entity: Entity
    ):
        """Test creating a new relation"""
        relation_data = {
            'from_id': sample_entity.id,
            'to_id': related_entity.id,
            'relation_type': 'test_relation',
            'context': 'test-context'
        }
        relation = await relation_repository.create(relation_data)
        
        assert relation.from_id == sample_entity.id
        assert relation.to_id == related_entity.id
        assert relation.relation_type == 'test_relation'
        assert relation.id is not None  # Should be auto-generated

    async def test_find_by_entities(
        self,
        relation_repository: RelationRepository,
        sample_relation: Relation,
        sample_entity: Entity,
        related_entity: Entity
    ):
        """Test finding relations between specific entities"""
        relations = await relation_repository.find_by_entities(
            sample_entity.id,
            related_entity.id
        )
        assert len(relations) == 1
        assert relations[0].id == sample_relation.id
        assert relations[0].relation_type == sample_relation.relation_type

    async def test_find_by_type(
        self,
        relation_repository: RelationRepository,
        sample_relation: Relation
    ):
        """Test finding relations by type"""
        relations = await relation_repository.find_by_type('test_relation')
        assert len(relations) == 1
        assert relations[0].id == sample_relation.id

    async def test_delete_by_fields_single_field(
        self,
        relation_repository: RelationRepository,
        multiple_relations: list[Relation]
    ):
        """Test deleting relations by a single field."""
        # Delete all relations of type 'relation_one'
        result = await relation_repository.delete_by_fields(relation_type='relation_one')
        assert result is True

        # Verify deletion
        remaining = await relation_repository.find_by_type('relation_one')
        assert len(remaining) == 0

        # Other relations should still exist
        others = await relation_repository.find_by_type('relation_two')
        assert len(others) == 1

    async def test_delete_by_fields_multiple_fields(
        self,
        relation_repository: RelationRepository,
        multiple_relations: list[Relation],
        sample_entity: Entity,
        related_entity: Entity
    ):
        """Test deleting relations by multiple fields."""
        # Delete specific relation matching both from_id and relation_type
        result = await relation_repository.delete_by_fields(
            from_id=sample_entity.id,
            relation_type='relation_one'
        )
        assert result is True

        # Verify correct relation was deleted
        remaining = await relation_repository.find_by_entities(
            sample_entity.id,
            related_entity.id
        )
        assert len(remaining) == 1  # Only relation_two should remain
        assert remaining[0].relation_type == 'relation_two'

    async def test_delete_by_fields_no_match(
        self,
        relation_repository: RelationRepository,
        multiple_relations: list[Relation]
    ):
        """Test delete_by_fields when no relations match."""
        result = await relation_repository.delete_by_fields(
            relation_type='nonexistent_type'
        )
        assert result is False

    async def test_delete_by_fields_all_fields(
        self,
        relation_repository: RelationRepository,
        multiple_relations: list[Relation],
        sample_entity: Entity,
        related_entity: Entity
    ):
        """Test deleting relation by matching all fields."""
        # Get first relation's data
        relation = multiple_relations[0]
        
        # Delete using all fields
        result = await relation_repository.delete_by_fields(
            from_id=relation.from_id,
            to_id=relation.to_id,
            relation_type=relation.relation_type,
            context=relation.context
        )
        assert result is True

        # Verify only exact match was deleted
        remaining = await relation_repository.find_by_type(relation.relation_type)
        assert len(remaining) == 1  # One other relation_one should remain
        assert remaining[0].context != relation.context