"""Tests for API factory functions."""

from unittest.mock import MagicMock, patch

from python_pdp_sdk import (
    AuthorizationBackend,
    MigrationAuthorizationBackend
)
from owsclient import OwsClient
from owsrequest.ows_client import correlation_id_getter, request_context_getter

from product import config
from product.api import (
    authorization_backend,
    migration_authorization_backend,
    ows_client,
    request_tags,
    setup_authorization_backend,
    setup_migration_authorization_backend,
    setup_ows_client,
)


@patch('product.api.OwsClient')
def test_setup_ows_client_calls_constructor_with_config(mock_ows_client_class):
    """Verify setup_ows_client calls OwsClient constructor with config values."""
    setup_ows_client()
    mock_ows_client_class.assert_called_once_with(
        environment=config.ENVIRONMENT,
        service_name=config.SERVICE_NAME,
        correlation_id_getter=correlation_id_getter,
        request_context_getter=request_context_getter,
    )


def test_setup_ows_client_returns_ows_client_instance():
    """Verify setup_ows_client returns an OwsClient instance."""
    result = setup_ows_client()
    assert isinstance(result, OwsClient)


@patch('product.api.PdpAuthorizationBackend')
@patch('product.api.OwsPdpClient')
def test_setup_authorization_backend_wraps_ows_client_in_pdp_client(
        mock_pdp_client, mock_pdp_backend):
    """Verify ows_client is wrapped in OwsPdpClient and PdpAuthorizationBackend."""
    mock_ows_client = MagicMock()
    result = setup_authorization_backend(mock_ows_client)
    mock_pdp_client.assert_called_once_with(mock_ows_client)
    mock_pdp_backend.assert_called_once_with(mock_pdp_client.return_value)
    assert result is mock_pdp_backend.return_value


@patch('product.api.MigrationAuthorizationBackend')
def test_setup_migration_authorization_backend_wraps_inner_backend(mock_migration_backend):
    """Verify the inner backend is wrapped in a MigrationAuthorizationBackend."""
    mock_inner_backend = MagicMock()
    result = setup_migration_authorization_backend(mock_inner_backend)
    mock_migration_backend.assert_called_once_with(
        inner_backend=mock_inner_backend,
        service_name=config.SERVICE_NAME,
        environment=config.ENVIRONMENT,
        extra_tags_getter=request_tags,
        metrics_enabled=config.PP_MIGRATION_METRICS_ENABLED,
    )
    assert result is mock_migration_backend.return_value


def test_module_level_globals_satisfy_expected_interfaces():
    """Verify module-level globals satisfy the expected interfaces."""
    assert isinstance(ows_client, OwsClient)
    assert isinstance(authorization_backend, AuthorizationBackend)
    assert isinstance(migration_authorization_backend, MigrationAuthorizationBackend)