import turtle, random , math

screen = turtle.Screen()
screen.bgcolor("blue")
screen.title("Snake Game")
screen.setup(500,500,0,0)
screen.tracer(0)

class Bord(turtle.Turtle):
    def __init__(self):
        turtle.Turtle.__init__(self)
        self.penup()
        self.speed(0)
        self.pensize(3)
        self.color("Black")
        self.setposition(-200,-200)

    def draw(self):
        for i in range(4):
            self.pendown()
            self.forward(400)
            self.left(90)
            self.penup()
            self.hideturtle()


class Snake(turtle.Turtle):
    def __init__(self):
        turtle.Turtle.__init__(self)
        self.color("white")
        self.shape("square")
        self.penup()
        self.speed(0)
        self.speed = 0.05
        self.direction = "stop"

    def move(self):
        if self.direction =="left":
            self.goto(self.xcor() -self.speed, self.ycor())
            if self.xcor() < -190:
                self.direction = "stop"
        elif self.direction =="right":
            self.goto(self.xcor() + self.speed, self.ycor())
            if self.xcor() > 190:
                self.direction = "stop"
        elif self.direction == "up":
            self.goto(self.xcor() , self.ycor() + self.speed)
            if self.ycor() > 190:
                self.direction = "stop"
        elif self.direction == "down":
            self.goto(self.xcor(), self.ycor() - self.speed)
            if self.ycor() < -190:
                self.direction = "stop"
        else:
            self.goto(self.xcor(), self.ycor())

    def move_left(self):
        self.direction = "left"
    def move_right(self):
        self.direction = "right"
    def move_up(self):
        self.direction = "up"
    def move_down(self):
        self.direction = "down"

class Food(turtle.Turtle):
    def __init__(self):
        turtle.Turtle.__init__(self)
        self.shape("circle")
        self.color("orange")
        self.penup()
        self.speed(0)
        self.setposition(random.randrange(-190,190), random.randrange(-190,190))
    def jump(self):
        self.goto(random.randrange(-190,190),\
                  random.randrange(-190,190))

def is_contact(object_1, object_2):
    a = object_1.xcor() - object_2.xcor()
    b = object_1.ycor() - object_2.ycor()
    distance = math.sqrt((a ** 2) + (b ** 2))
    if distance < 10:
        return True
    else:
        return False

# OBJECTS

bord = Bord()
bord.draw()
snake = Snake()
food = Food()

# KEY BINDINGS
turtle.listen()
turtle.onkey(snake.move_left,"Left")
turtle.onkey(snake.move_right,"Right")
turtle.onkey(snake.move_up,"Up")
turtle.onkey(snake.move_down,"Down")

# MAIN FUNCTION
def main():
    # GAME LOOP
    while True:
        screen.update()
        snake.move()

        if is_contact(snake, food):
            print("contact")
            food.jump()

if __name__ =="__main__":
    main()