"""Cross-Platform Qt Compliance Validation Test Suite.

This module provides comprehensive cross-platform testing to ensure the Qt
compliance system works correctly across different operating systems,
Python versions, and Qt library versions.
"""

import os
import platform
import sys
import unittest

import pytest

# Use shared Qt fixtures
from tests.fixtures.qt_fixtures import QT_AVAILABLE, QtCore, QtWidgets


class TestCrossPlatformQtValidation(unittest.TestCase):
    """Cross-platform Qt validation tests."""

    def setUp(self):
        """Set up test environment."""
        self.platform_info = {
            "system": platform.system(),
            "version": platform.version(),
            "python_version": sys.version,
            "qt_available": QT_AVAILABLE,
        }

    @pytest.mark.qt_validation
    @pytest.mark.unit
    def test_qt_availability_detection(self):
        """Test Qt availability detection across platforms."""
        if QT_AVAILABLE:
            # Qt should be importable
            assert QtWidgets is not None
            assert QtCore is not None
        else:
            # Mock objects should be available
            assert QtWidgets.QApplication is not None

    @pytest.mark.qt_validation
    @pytest.mark.integration
    def test_qt_application_creation(self):
        """Test Qt application creation across platforms."""
        if not QT_AVAILABLE:
            pytest.skip("Qt not available")

        # Application should be created successfully
        app = QtWidgets.QApplication.instance()
        if app is None:
            app = QtWidgets.QApplication(sys.argv)
        assert app is not None

    @pytest.mark.qt_validation
    @pytest.mark.unit
    def test_qt_widget_creation(self):
        """Test Qt widget creation across platforms."""
        if not QT_AVAILABLE:
            pytest.skip("Qt not available")

        # Ensure application exists
        app = QtWidgets.QApplication.instance()
        if app is None:
            app = QtWidgets.QApplication(sys.argv)

        # Widget should be created successfully
        widget = QtWidgets.QWidget()
        assert widget is not None
        widget.close()

    @pytest.mark.qt_validation
    @pytest.mark.unit
    def test_platform_specific_qt_behavior(self):
        """Test platform-specific Qt behavior."""
        system = platform.system()

        if system == "Darwin":  # macOS
            # macOS-specific Qt tests
            assert os.environ.get("QT_QPA_PLATFORM") == "offscreen"

        elif system == "Linux":
            # Linux-specific Qt tests
            assert os.environ.get("QT_QPA_PLATFORM") == "offscreen"

        elif system == "Windows":
            # Windows-specific Qt tests
            assert os.environ.get("QT_QPA_PLATFORM") == "offscreen"

    @pytest.mark.qt_validation
    @pytest.mark.unit
    def test_qt_version_compatibility(self):
        """Test Qt version compatibility."""
        if not QT_AVAILABLE:
            pytest.skip("Qt not available")

        # Basic compatibility check
        try:
            app = QtWidgets.QApplication.instance()
            if app is None:
                app = QtWidgets.QApplication([])

            widget = QtWidgets.QWidget()
            assert widget is not None
            widget.close()

        except Exception as e:
            pytest.fail(f"Qt version compatibility issue: {e}")

    @pytest.mark.qt_validation
    @pytest.mark.slow
    def test_qt_gui_interaction(self):
        """Test Qt GUI interaction across platforms."""
        if not QT_AVAILABLE:
            pytest.skip("Qt not available")

        # Ensure application exists
        app = QtWidgets.QApplication.instance()
        if app is None:
            app = QtWidgets.QApplication(sys.argv)

        # Create test widget directly
        widget = QtWidgets.QWidget()
        assert widget is not None

        # Test basic interaction
        app.processEvents()
        widget.close()


class TestQtComplianceValidation(unittest.TestCase):
    """Qt compliance validation tests."""

    @pytest.mark.qt_validation
    @pytest.mark.unit
    def test_qt_thread_safety(self):
        """Test Qt thread safety compliance."""
        if not QT_AVAILABLE:
            pytest.skip("Qt not available")

        # Basic thread safety test
        import threading

        results = []

        def create_widget():
            try:
                QtWidgets.QWidget()
                results.append("success")
            except Exception as e:
                results.append(f"error: {e}")

        # Note: This is intentionally testing thread safety issues
        thread = threading.Thread(target=create_widget)
        thread.start()
        thread.join()

        # We expect this to either succeed or fail gracefully
        assert len(results) == 1

    @pytest.mark.qt_validation
    @pytest.mark.unit
    def test_qt_memory_management(self):
        """Test Qt memory management compliance."""
        if not QT_AVAILABLE:
            pytest.skip("Qt not available")

        # Create and destroy widgets to test memory management
        widgets = []

        for _i in range(10):
            widget = QtWidgets.QWidget()
            widgets.append(widget)

        # Clean up widgets
        for widget in widgets:
            widget.close()

        # Test passes if no crashes occur


@pytest.mark.qt_validation
class TestQtSystemIntegration:
    """Qt system integration tests."""

    def test_qt_display_environment(self):
        """Test Qt display environment setup."""
        os.environ.get("DISPLAY")
        qpa_platform = os.environ.get("QT_QPA_PLATFORM")

        # In test environment, should use offscreen platform
        assert qpa_platform == "offscreen"

    def test_qt_logging_configuration(self):
        """Test Qt logging configuration."""
        qt_logging = os.environ.get("QT_LOGGING_RULES")

        # Qt logging should be configured for testing
        if qt_logging:
            # Accept any logging rule that disables unwanted output
            assert "false" in qt_logging.lower()


if __name__ == "__main__":
    unittest.main()
