#!/usr/bin/python3
import sys
import pygame
from settings import Settings
from ship import Ship
from bullet import Bullet
class AlienInvasion:
    """Overall Class to manage Game assets and behaviors."""
    def __init__(self):
        """Initialize the dame and create game resources."""
        
        pygame.init()
        self.settings=Settings()
        
        self.screen=pygame.display.set_mode((0,0),pygame.FULLSCREEN)
        
        self.settings.screen_width=self.screen.get_rect().width
        self.settings.screen_height = self.screen.get_rect().height
        
       
        
        pygame.display.set_caption("Alien Invasion")
        # Creating the Ship or i should say     
            
        self.ship=Ship(self)
        self.bullets = pygame.sprite.Group()
      
    def run_game(self):
        """Start the main loop for the game."""
        while True:
            
            self._check_events()
            self.ship.update()
            self.bullets.update()
            
            # Get rid of bullets that have disappeared.
            for bullet in self.bullets.copy():
                if bullet.rect.bottom <= 0:
                    self.bullets.remove(bullet)
            print(len(self.bullets))
                        
            self._update_screen()
        
    def _check_events(self):
        # This is a helper method , they all start with _
        #Whatch for keyboard and mouse events.
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
            elif event.type == pygame.KEYDOWN:
                self._check_keydown_events(event)
                    
            elif event.type == pygame.KEYUP:
                self._check_keyup_events(event) 
                    
    def _update_screen(self):
        """Update Images ON the screen, and flip to the new Screen"""
        # Redraw the screen during each pass through the loop.
        self.screen.fill(self.settings.bg_color) 
        
        self.ship.blitme()
        
        for bullet in self.bullets.sprites():
            bullet.draw_bullet()
        
        #Make the most recently Drawn screen visible    
        pygame.display.flip()
    def _check_keydown_events(self,event):
        """Respond to keypresses."""
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = True
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = True
        
        elif event.key == pygame.K_q:
            sys.exit()  
        elif event.key == pygame.K_SPACE:
            self._fire_bullet()
        
    def _check_keyup_events(self, event):
        """Respond to key releases."""
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = False 
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = False
    def _fire_bullet(self):
        """Create a new bullet and add it to the bullets group."""
        new_bullet = Bullet(self)
        self.bullets.add(new_bullet)

if __name__=="__main__":
    #Make a game instance and run the game
    ai=AlienInvasion()
    ai.run_game()
        
        
        
        
        
        
        
        