settings.py

import pygame


class Settings:
    """ 
    * A class to store all the settings for Alien Invasion. *
    """

    def __init__(self):
        """
        * Initialize the game's settings. *
        """
        pygame.init()
        # Start Menu
        self.show_menu = True

        # Screen settings
        self.screen_width = pygame.display.Info().current_w
        self.screen_height = pygame.display.Info().current_h
        self.bg_color = (0, 0, 0)

        # Ship settings
        self.ship_limit = 3

        # Bullet settings
        self.bullet_width = 3
        self.bullet_height = 15
        self.bullet_color = (255, 128, 0)
        self.bullets_allowed = 4

        # Alien settings
        self.fleet_drop_speed = 10

        # How quickly the game speeds up.
        self.speedup_scale = 1.1

        # How quickly the alien point values increase.
        self.score_scale = 1.5

        self.initialize_dynamic_settings()

    def initialize_dynamic_settings(self):
        """ Initialize settings that change throughout the game. """
        self.ship_speed = 2.5
        self.bullet_speed = 2.5
        self.alien_speed = 1.5

        # Fleet Direction of 1 represents right; -1 represents left
        self.fleet_direction = 1

        # Scoring
        self.alien_points = 50

    def increase_speed(self):
        """ Increase speed settings and point values. """
        self.ship_speed *= self.speedup_scale
        self.bullet_speed *= self.speedup_scale
        self.alien_speed *= self.speedup_scale

        self.alien_points = int(self.alien_points * self.score_scale)