"""
Educational anti-example.

This program intentionally violates several Zen of Python principles
to demonstrate classes, threads, exceptions, and the __main__ idiom,
while doing nothing more than printing "Hello, world!".
"""
import threading

# filename: hello_world_pep20_violation.py

class Hello:
    """
    A deliberately over-engineered Hello World example.
    """
    
    def __init__(self, message="Hello, world!"):

        self.message = message
    
    def launch_greetings(self):
        # A daemon thread is considered non-essential.
        # If the main program ends, Python does not wait for daemon threads.
        # They may be stopped before completing their work.
        #
        # thread = threading.Thread(target=self.greetings, daemon=True)

        # Here we create a regular thread instead.
        # Python will keep the program alive until this thread has finished.
        # Avoid:
        # thread = threading.Thread(target=self.greetings, daemon=True)
        thread = threading.Thread(target=self.greetings)
        
        # Start the thread.
        # This runs self.greetings() separately from the main program flow.
        thread.start()
        # Wait until the thread has finished.
        # Without join(), the main program could continue immediately.
        thread.join()

    def greetings(self):

        try:

            print(f"\n{self.message}\n")
        # This is intentionally broad for demonstration.
        # In real code, catch specific exceptions whenever possible.
        except Exception: 

            print("\nYou cannot save the world so easily!")

        finally:

            print(f"You know how to print {self.message} in a console! Congratulations Champion!")

            print("\t- I just wanted to print Hello World,\n\nbut then I accidentally revised half of Python.")

            print('\nOf course, you could simply use print("Hello, world!")\nbut here you will learn\n\t- classes\n\t- threads\n\t- try\n\t- except\n\t- finally\n\t- exceptions\n\t- f-strings\n\t- tabs and line breaks in strings...\n')

            print("So yes, this is Hello World with unnecessary engineering.")

            print("So this will never be approved in a PEP!")

            print(f"© Nicolas Pirson 03/07/2026 (my birthday) 😉\nCheck my website at https://pirson.me")

if __name__ == "__main__":

    hello = Hello()

    hello.launch_greetings()
    
    # Without this line, the console may close immediately
    # when the script is launched by double-clicking the file.
    # Avoid time.sleep(n) here: it waits for a fixed duration,
    # while input() waits until the user is ready to exit.

    input("\nPress Enter to exit...")