# Copyright 2021 (c) Anna Schumaker.
from . import publisher
import threading

Start = publisher.Publisher()

class Thread:
    def __init__(self, func):
        self.func = func
        self.thread = None
        self.lock = threading.Lock()

    def __call__(self):
        with self.lock:
            if self.thread:
                return None
            self.thread = threading.Thread(target = self.__func__)
            self.thread.start()
        Start.publish(self)
        return self

    def __func__(self):
        self.func()
        with self.lock:
            self.thread = None

    def join(self):
        if self.thread:
            self.thread.join()

    def running(self):
        with self.lock:
            if self.thread:
                return self.thread.is_alive()
            return False