"""Tests for the credentials API endpoint."""

from unittest.mock import AsyncMock, patch

import pytest
from fastapi.testclient import TestClient


@pytest.fixture
def client():
    """Create test client after environment variables have been cleared by conftest."""
    from api.main import app

    return TestClient(app)


class TestCredentialCascadeDelete:
    """Tests for #651 - deleting credential cascade-deletes linked models."""

    @pytest.mark.asyncio
    @patch("api.routers.credentials.Credential.get")
    async def test_cascade_delete_linked_models(self, mock_get, client):
        """Deleting credential without options cascade-deletes linked models."""
        mock_model1 = AsyncMock()
        mock_model1.id = "model:1"
        mock_model1.provider = "openai"
        mock_model1.name = "gpt-4"

        mock_model2 = AsyncMock()
        mock_model2.id = "model:2"
        mock_model2.provider = "openai"
        mock_model2.name = "gpt-3.5-turbo"

        mock_cred = AsyncMock()
        mock_cred.get_linked_models = AsyncMock(
            return_value=[mock_model1, mock_model2]
        )
        mock_cred.delete = AsyncMock()
        mock_get.return_value = mock_cred

        response = client.delete("/api/credentials/cred:123")

        assert response.status_code == 200
        data = response.json()
        assert data["deleted_models"] == 2
        assert data["message"] == "Credential deleted successfully"

        mock_model1.delete.assert_awaited_once()
        mock_model2.delete.assert_awaited_once()
        mock_cred.delete.assert_awaited_once()

    @pytest.mark.asyncio
    @patch("api.routers.credentials.Credential.get")
    async def test_delete_credential_no_linked_models(self, mock_get, client):
        """Deleting credential with no linked models works cleanly."""
        mock_cred = AsyncMock()
        mock_cred.get_linked_models = AsyncMock(return_value=[])
        mock_cred.delete = AsyncMock()
        mock_get.return_value = mock_cred

        response = client.delete("/api/credentials/cred:123")

        assert response.status_code == 200
        data = response.json()
        assert data["deleted_models"] == 0
        mock_cred.delete.assert_awaited_once()

    @pytest.mark.asyncio
    @patch("api.routers.credentials.Credential.get")
    async def test_migrate_models_instead_of_delete(self, mock_get, client):
        """Passing migrate_to reassigns models instead of deleting them."""
        mock_model = AsyncMock()
        mock_model.id = "model:1"
        mock_model.credential = "cred:123"
        mock_model.save = AsyncMock()

        mock_cred = AsyncMock()
        mock_cred.get_linked_models = AsyncMock(return_value=[mock_model])
        mock_cred.delete = AsyncMock()

        mock_target_cred = AsyncMock()
        mock_target_cred.id = "cred:456"

        # First call returns cred to delete, second returns target
        mock_get.side_effect = [mock_cred, mock_target_cred]

        response = client.delete(
            "/api/credentials/cred:123?migrate_to=cred:456"
        )

        assert response.status_code == 200
        data = response.json()
        assert data["deleted_models"] == 0  # Models were migrated, not deleted
        mock_model.save.assert_awaited_once()
        assert mock_model.credential == "cred:456"
        mock_cred.delete.assert_awaited_once()


if __name__ == "__main__":
    pytest.main([__file__, "-v"])