#!/usr/bin/env python
"""circuits Hello World"""

from circuits import Component, Event


class hello(Event):
    """hello Event"""


class App(Component):
    def hello(self):
        """Hello Event Handler"""
        return 'Hello World!'

    def started(self, component):
        """
        Started Event Handler

        This is fired internally when your application starts up and can be used to
        trigger events that only occur once during startup.
        """
        x = self.fire(hello())  # Fire hello Event
        yield self.wait('hello')  # Wait for Hello Event to fire

        print(x.value)  # Print the value we got back from firing Hello

        raise SystemExit(0)  # Terminate the Application


def main():
    App().run()


if __name__ == '__main__':
    main()