import pygame
from pygame.sprite import Group

from settings import Settings
from game_stats import GameStats
from scoreboard import Scoreboard
from button import Button
from ship import Ship
import game_functions as gf

def run_game():
    # Initialize pygame , settings and screen object.
    pygame.init()
    ai_settings = Settings()
    screen = pygame.display.set_mode((ai_settings.screen_width,ai_settings.screen_height))
    pygame.display.set_caption("Alien Invasion")
    gf.bg_music("game start.mp3")

    # Make the Play button.
    play_button = Button(ai_settings,screen,"Play")

    # Create an instance to store game statistics and create a scoreboard.
    stats = GameStats(ai_settings)
    sb = Scoreboard(ai_settings,screen,stats)

    # Make a ship,a group of bullets, and a group of aliens.
    ship = Ship(ai_settings, screen)
    bullets = Group()
    aliens = Group()

    # Create the fleet of aliens.
    gf.create_fleet(ai_settings,screen,ship,aliens)
    gf.load_score(stats)
    sb.prep_high_score()
    sb.show_score()


    # Start the main loop for the game.
    while True:

        gf.check_events(ai_settings,screen,stats,sb,play_button,ship,aliens,bullets)

        if stats.game_active:
            ship.update()
            gf.update_bullets(ai_settings,screen,stats,sb,ship,aliens,bullets)
            gf.update_aliens(ai_settings,screen,stats,sb,ship,aliens,bullets)

        gf.update_screen(ai_settings,screen,stats,sb,ship,aliens,bullets,play_button)

run_game()
