"""
Safe imports for platform controllers.
Provides fallback when PyQt5 is not available during testing.
"""

try:
    from PyQt5.QtCore import QObject, QThread, pyqtSignal
    PYQT5_AVAILABLE = True
except ImportError:
    # Fallback for testing without PyQt5
    class QObject:
        def __init__(self):
            pass
    
    class QThread(QObject):
        def __init__(self):
            super().__init__()
            self.running = True
        
        def start(self):
            pass
        
        def stop(self):
            self.running = False
        
        def isRunning(self):
            return self.running
        
        def quit(self):
            self.running = False
        
        def wait(self):
            pass
    
    def pyqtSignal(*args, **kwargs):
        """Mock pyqtSignal for testing"""
        class MockSignal:
            def connect(self, func):
                pass
            def emit(self, *args):
                pass
        return MockSignal()
    
    PYQT5_AVAILABLE = False

__all__ = ['QObject', 'QThread', 'pyqtSignal', 'PYQT5_AVAILABLE']