import threading


class AsyncTask(threading.Thread):
    """
        AsyncTask

    AsyncTask is a utility class allowing to execute a task asynchronously in a thread.
    For more informations read the constructor documentation.

    @author     Jérémi Nihart / EndMove
    @link       https://git.endmove.eu/EndMove/WebPicDownloader
    @version    1.0.0
    @since      2022-09-01
    """
    # Variables
    __stop = None
    __callback = None
    __args: list = None

    # Constructor
    def __init__(self, callback, args=()) -> None:
        """
            Constructor
        => Spacify here the function that should be launched asynchronously. Then use the
        function {AsyncTask.start()} to start the thread and the processing.
        [!]: The function {AsyncTask.run()} is reserved for the thread and should not be run
        from outside.

        :callback: -> Is the function to launch asynchronously.
        :args: -> Argument to pass to the function when executing it.
        """
        super().__init__()
        self.__stop = threading.Event()
        self.__callback = callback
        self.__args = args

    def run(self) -> None:
        """
        [!] : This function should not be used! Start the task with {AsyncTask.start()}!
        """
        self.__callback(*self.__args)
    
    def stop(self) -> None:
        # TODO
        self.__stop.set()