import pygame
import random
from os import path

pygame.init()
clock = pygame.time.Clock()

width = 600
height = 800
FPS = 60

screen = pygame.display.set_mode((width, height))
pygame.display.set_caption('Car Race')
img_dir = path.join(path.dirname(__file__), 'Images')
player_sprite = pygame.image.load(path.join(img_dir, 'Car.png')).convert_alpha()
background = pygame.image.load(path.join(img_dir, 'road1.png')).convert()
background_rect = background.get_rect()

sprites = pygame.sprite.Group()
enemies = pygame.sprite.Group()

# enemy
# enemy_sprite = pygame.image.load(path.join(img_dir, 'Audi.png')).convert_alpha()


# defining the regions
centerR1 = (185 / 2)
centerR2 = centerR1 + 185
centerR3 = centerR2 + 185

y = 0


class Player(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.transform.scale(player_sprite, (71, 168))
        self.rect = self.image.get_rect()
        self.rect.x = 265
        self.rect.y = 540

        self.speedx = 0

    def update(self):
        self.speedx = 0
        keystate = pygame.key.get_pressed()
        if keystate[pygame.K_a]:
            self.speedx = -5
        if keystate[pygame.K_d]:
            self.speedx = 5

        self.rect.x += self.speedx

        if self.rect.x <= 22:
            self.rect.x = 22
        elif self.rect.x >= 600 - (71 + 22):
            self.rect.x = 600 - (71 + 22)


class Enemies(pygame.sprite.Sprite):
    def __init__(self, car_graphic):
        pygame.sprite.Sprite.__init__(self)
        # self.image = pygame.transform.scale(enemy_sprite, (197, 197))
        self.original_image = car_graphic
        self.image = self.original_image
        self.rect = self.image.get_rect()
        self.rect.x = random.randrange(22, width - 22)
        self.rect.y = -500
        self.speedy = 0

    def update(self):
        self.speedy = 14
        self.rect.y += self.speedy

        if self.rect.y > height:
            self.rect.y = 0 - height
            self.rect.x = random.randrange(0, width)


def loadEnemy():
    car_names = ['Ambulance.png', 'Audi.png', 'Black_viper.png', 'Mini_truck.png', 'Mini_van.png', 'Police.png',
                 'taxi.png', 'truck.png']
    car_files = []
    for image in car_names:
        car_files.append(pygame.image.load(path.join(img_dir, image)).convert_alpha())

    return car_files


def createEnemyInstance():
    enemy = Enemies(random.choice(enemy_graphic))
    sprites.add(enemy)
    enemies.add(enemy)


enemy_graphic = loadEnemy()
for i in range(5):
    createEnemyInstance()

#  player
player_car = Player()
sprites.add(player_car)

# enemy
enemy = Enemies(enemy_graphic)
enemies.add(enemy)

running = True
while running:
    clock.tick(FPS)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    sprites.update()
    enemies.update()

    # Continuous scrolling background
    rel_y = y % background.get_rect().height
    screen.blit(background, (0, rel_y - background.get_rect().height))
    if rel_y < height:
        screen.blit(background, (0, rel_y))
    y += 14

    sprites.draw(screen)
    enemies.draw(screen)
    pygame.display.update()

pygame.quit()