#!/usr/bin/env python3


# IMPORTS
import pygame
pygame.init()


# Constants
SIZE = (800, 600)
BLACK = (0, 0, 0)
FPS = 60


class Game:
    """ Main Game class 

    :ivar pygame.Surface screen: The main window
    :ivar pygame.clock.Clock clock: The main clock
    :ivar bool running: Running Flag
    """

    def __init__(self):
        """ Initialize framework for a game """
        # Init screen
        self.screen = pygame.display.set_mode(SIZE)
        pygame.display.set_caption("Hello Pygame")

        # Init clock
        self.clock = pygame.time.Clock()

        # Set running flag
        self.running = False

    def run(self):
        """ Run the main game loop """
        self.running = True
        while self.running:
            # Handle events
            self.handle_events()

            # Update game logic
            self.update()

            # Draw everything
            self.draw()

            # Run smoothly with 60 FPS
            self.clock.tick(FPS)

    def handle_events(self):
        """ Handle user input """
        for event in pygame.event.get():

            # Check for QUIT event
            if event.type == pygame.QUIT:
                self.running = False

            # Check for KEYDOWN events
            if event.type == pygame.KEYDOWN:

                # Specifically check for ESC
                if event.key == pygame.K_ESCAPE:
                    self.running = False

    def update(self):
        """ Update game logic """
        pass

    def draw(self):
        """ Draw everything to the screen """
        self.screen.fill(BLACK)
        pygame.display.flip()


if __name__ == "__main__":
    Game().run()
    pygame.quit()