import  turtle
import time
import random

delay=0.1
#score
score=0
highscore=0

#set up the screen
wn=turtle.Screen()
wn.title("Snake Game by Vlassis")
wn.bgcolor("black")
wn.setup(width=600,height=600)
wn.tracer(0)

#snake head
head=turtle.Turtle()
head.speed(0)
head.shape("square")
head.color("white") #square
head.penup()
head.goto(0,0)
head.direction="stop"


#snake food
food=turtle.Turtle()
food.speed(0)
food.shape("circle")
food.color("orange") 
food.penup()
food.goto(0,100)


segments=[]

#pen
pen =turtle.Turtle()
pen.speed(0)
pen.shape("square")
pen.color("white")
pen.penup()
pen.hideturtle()
pen.goto(0,260)
pen.write("Score: 0 High Score: 0",align="center",font=("Courier",24,"normal"))


#functions
def go_up():
    if head.direction !="down":
        head.direction="up"
        
    

def go_down():
    if head.direction !="up":
        head.direction="down"
def go_left():
    if head.direction !="right":
        head.direction="left"
def go_right():
    if head.direction !="left":
        head.direction="right"

#Keybord binding
wn.listen()
wn.onkeypress(go_up,"Up")
wn.onkeypress(go_down,"Down")
wn.onkeypress(go_left,"Left")
wn.onkeypress(go_right,"Right")

def move():
    if head.direction == "up":
        y=head.ycor()
        head.sety(y+20)

    if head.direction == "down":
        y=head.ycor()
        head.sety(y-20)

    if head.direction == "left":
        x=head.xcor()
        head.setx(x-20)
    if head.direction == "right":
        x=head.xcor()
        head.setx(x+20)



#Main game loop
while True:
    wn.update()
    #Check for a collision
    if head.xcor()>290 or head.xcor()<-290 or head.ycor()>290 or head.ycor()<-290:
        time.sleep(1)
        head.goto(0,0)
        head.direction="stop"
        #Hide the segments
        for segment in segments:
            segment.goto(1000,1000)

        #clear the segments
        segments.clear()
        #Reset score
        score=0
        pen.clear()
        pen.write("Score: {} High Score: {}".format(score,highscore),align="center",font=("Courier",24,"normal"))
        delay=0.1

  

    if head.distance(food)<20:
        #move the to random pos
        x=random.randint(-290,290)
        y=random.randint(-290,290)
        food.goto(x,y)
        

        #Add a segment
        new_segment=turtle.Turtle()
        new_segment.speed(0)
        new_segment.shape("square")
        new_segment.color("light grey")
        new_segment.penup()
        segments.append(new_segment)
        delay -=0.001

        score +=10

        if score>highscore:
            highscore=score
        
        pen.clear()
        pen.write("Score: {} High Score: {}".format(score,highscore),align="center",font=("Courier",24,"normal"))

    #Move the end segments first
    for index in range(len(segments)-1,0,-1):
        x=segments[index-1].xcor()
        y=segments[index-1].ycor()
        segments[index].goto(x,y)
         

    #Move the 0 where the head is
    if len(segments)>0:
        x=head.xcor()
        y=head.ycor()
        segments[0].goto(x,y)



    move()

    #check for head collision with body
    for segment in segments:
        if segment.distance(head)<20:
            time.sleep(1)
            head.goto(0,0)
            head.direction="stop"
            for segment in segments:
                segment.goto(1000,1000)
            
            segments.clear()
            #Reset score
            score=0
            pen.clear()
            delay=0.1
            pen.write("Score: {} High Score: {}".format(score,highscore),align="center",font=("Courier",24,"normal"))

        


             
         
    time.sleep(delay)




wn.mainloop()

