import logging

try:
    from watchdog.observers import Observer
    from watchdog.events import (
        FileSystemEventHandler,
        FileCreatedEvent,
        FileModifiedEvent,
    )

    class HotReloader(FileSystemEventHandler):
        """Might be unbound, if watchdog is not installed. Check if equal to None before use."""

        def __init__(self, path):
            self.path = path
            self.observer = Observer()
            self.observer.schedule(self, path, recursive=True)
            self.observer.start()

        def __del__(self):
            self.observer.stop()
            self.observer.join()

        def on_modified(self, event: FileModifiedEvent):
            logging.info("Config file modified. Triggering hot reload.")

        def on_created(self, event: FileCreatedEvent):
            logging.info("New config file created. Triggering hot reload.")

    logging.debug("Watchdog imported successfully. Hot reloading available.")


except ImportError:
    logging.info("Watchdog is not installed. Hot reloading unavailable.")