"""
Structural tests for backend code.

Tests imports, basic structure, and logic without requiring FastAPI/Supabase.
"""

import sys
from unittest.mock import MagicMock, patch

import pytest


class TestBackendImports:
    """Test backend module imports."""

    def test_ingest_module_structure(self):
        """Test ingest module can be imported (with mocks)."""
        # Mock dependencies
        with patch.dict(sys.modules, {
            'supabase': MagicMock(),
            'fastapi': MagicMock(),
            'pydantic': MagicMock(),
        }):
            try:
                from backend.app.api.v1 import ingest
                assert ingest.router is not None
                assert hasattr(ingest, 'IngestRequest')
                assert hasattr(ingest, 'TraceEventPayload')
            except ImportError as e:
                pytest.skip(f"Backend dependencies not available: {e}")

    def test_clerk_auth_structure(self):
        """Test Clerk auth module structure."""
        with patch.dict(sys.modules, {
            'clerk_sdk_python': MagicMock(),
            'fastapi': MagicMock(),
            'pydantic': MagicMock(),
            'jwt': MagicMock(),
        }):
            try:
                from backend.app.auth import clerk
                assert hasattr(clerk, 'ClerkAuth')
                assert hasattr(clerk, 'ClerkUser')
                assert hasattr(clerk, 'init_clerk_auth')
            except ImportError as e:
                pytest.skip(f"Backend dependencies not available: {e}")

    def test_database_models_structure(self):
        """Test database models structure."""
        with patch.dict(sys.modules, {
            'sqlalchemy': MagicMock(),
        }):
            try:
                from backend.app.database import models
                assert hasattr(models, 'TraceEventModel')
                assert hasattr(models, 'RunMetadataModel')
                assert hasattr(models, 'Base')
            except ImportError as e:
                pytest.skip(f"Backend dependencies not available: {e}")

    def test_database_connection_structure(self):
        """Test database connection structure."""
        with patch.dict(sys.modules, {
            'supabase': MagicMock(),
            'asyncpg': MagicMock(),
        }):
            try:
                from backend.app.database import connection
                assert hasattr(connection, 'DatabaseConnection')
                assert hasattr(connection, 'get_db_connection')
            except ImportError as e:
                pytest.skip(f"Backend dependencies not available: {e}")

    def test_processor_structure(self):
        """Test processor service structure."""
        with patch.dict(sys.modules, {
            'supabase': MagicMock(),
            'asyncpg': MagicMock(),
        }):
            try:
                from backend.app.services import processor
                assert hasattr(processor, 'TraceEventProcessor')
                assert hasattr(processor, 'init_processor')
            except ImportError as e:
                pytest.skip(f"Backend dependencies not available: {e}")


class TestBackendLogic:
    """Test backend logic without external dependencies."""

    def test_ingest_request_model(self):
        """Test IngestRequest model structure."""
        with patch.dict(sys.modules, {
            'pydantic': MagicMock(),
        }):
            try:
                from backend.app.api.v1.ingest import IngestRequest, TraceEventPayload
                # Verify models exist
                assert IngestRequest is not None
                assert TraceEventPayload is not None
            except ImportError:
                pytest.skip("Backend dependencies not available")

    def test_clerk_user_model(self):
        """Test ClerkUser model structure."""
        with patch.dict(sys.modules, {
            'pydantic': MagicMock(),
        }):
            try:
                from backend.app.auth.clerk import ClerkUser
                assert ClerkUser is not None
            except ImportError:
                pytest.skip("Backend dependencies not available")

