import pygame
import random
pygame.init()

#Colours
White = (225, 225, 225)
Red = (225, 0, 0)
Black = (0, 0, 0)
Gray = (100, 100, 100)
Cyan = (60, 60, 100)
Green = (0, 255, 0)
Blue = (0, 0, 255)
Yellow = (255, 255, 0)
Orange = (255, 120, 0)
Purple = (255, 0, 255)
Navyblue = (0, 255, 255)

# Creating Window
screen_width = 900
screen_height = 500
gamewindow = pygame.display.set_mode((screen_width , screen_height))

# Game Title
pygame.display.set_caption("SNAKES with Akash")
pygame.display.update()

# Game Specification variables
exit_game = False
game_over = False
snake_x = 46
snake_y = 56
food_x = random.randint(0, screen_width / 2)
food_y = random.randint(0, screen_height / 2)
Score = 0
velocity_x =0
velocity_y =0
snake_size =13
init_velocity = 5
fps = 45
clock = pygame.time.Clock()
font = pygame.font.SysFont(None,50)
def text_screen(text,colour,x,y):
    screen_text =font.render(text,True,colour)
    gamewindow.blit(screen_text,[x,y])

def plot_snake(gamewindow , colour,snake_list, snake_size):
    for x,y in snake_list:
        pygame.draw.rect(gamewindow,colour, [x , y , snake_size, snake_size])
snake_list = []
snake_length =1

# Game loop
while not exit_game :
    for event in pygame.event.get() :
        if event.type == pygame.QUIT :
            exit_game = True
        if event.type == pygame.KEYDOWN :
            if event.key == pygame.K_RIGHT :
                velocity_x = 5
                velocity_y = 0
            if event.key == pygame.K_LEFT :
                velocity_x = -5
                velocity_y = 0
            if event.key == pygame.K_UP :
                velocity_y = -5
                velocity_x = 0

            if event.key == pygame.K_DOWN :
                velocity_y = 5
                velocity_x = 0


    snake_x = snake_x + velocity_x
    snake_y = snake_y + velocity_y
    if abs(snake_x -food_x)<8 and abs(snake_y - food_y)<8 :
        Score = Score+1
        food_x = random.randint(20, screen_width / 2)
        food_y = random.randint(20, screen_height / 2)
        snake_length = snake_length + 3.2
    gamewindow.fill(White)
    text_screen("Score: " + str(Score * 5), Black, 5, 5)
    pygame.draw.rect(gamewindow, Orange,[food_x, food_y, snake_size, snake_size])
    head=[]
    head.append(snake_x)
    head.append(snake_y)
    snake_list.append(head)
    if len(snake_list)>snake_length :
        del snake_list[0]
    plot_snake(gamewindow, Cyan, snake_list, snake_size)
    pygame.display.update()
    clock.tick(fps)

pygame.quit()
quit()