from tkinter import *
import random
WIDTH = 1000
HEIGHT = 500

R_W = 10
R_H = 100

BALL_RADIUS = 35

root = Tk()

c = Canvas(root, width=WIDTH, height=HEIGHT, background="#006400")
c.pack()
c.create_line(R_W, 0, R_W, HEIGHT, fill="#006400")
c.create_line(WIDTH-R_W, 0, WIDTH-R_W, HEIGHT, fill="#006400")
c.create_line(WIDTH/2, 0, WIDTH/2, HEIGHT, fill="white")

BALL = c.create_oval(WIDTH/2+BALL_RADIUS/2,
                     HEIGHT/2+BALL_RADIUS/2,
                     WIDTH/2-BALL_RADIUS/2,
                     HEIGHT/2-BALL_RADIUS/2,
                     fill="white")



LEFT_PAD = c.create_line(R_W, 0, R_W, R_H+1, width=R_W, fill="red")

RIGHT_PAD = c.create_line(WIDTH-R_W/2, 0, WIDTH-R_W/2,
                          R_H+10, width=R_W, fill="blue")

BALL_X_CHANGE = 10
BALL_Y_CHANGE = 0

def move_ball():
    c.move(BALL, BALL_X_CHANGE, BALL_Y_CHANGE)

def main():
    move_ball()
    root.after(30, main)

main()
PAD_SPEED = 20
LEFT_PAD_SPEED = 0
RIGHT_PAD_SPEED = 0

def move_pads():
    PADS = {LEFT_PAD: LEFT_PAD_SPEED,
            RIGHT_PAD: RIGHT_PAD_SPEED}
    for pad in PADS:

        c.move(pad, 0, PADS[pad])

        if c.coords(pad)[1] < 0:
            c.move(pad, 0, -c.coords(pad)[1])
        elif c.coords(pad)[3] > HEIGHT:
            c.move(pad, 0, HEIGHT - c.coords(pad)[3])

def main():
     move_ball()
     move_pads()
     root.after(30, main)

c.focus_set()

def movement_handler(event):
    global LEFT_PAD_SPEED, RIGHT_PAD_SPEED
    if event.keysym == "w":
        LEFT_PAD_SPEED = -PAD_SPEED
    elif event.keysym == "s":
        LEFT_PAD_SPEED = PAD_SPEED
    elif event.keysym == "Up":
        RIGHT_PAD_SPEED = -PAD_SPEED
    elif event.keysym == "Down":
        RIGHT_PAD_SPEED = PAD_SPEED


c.bind("<KeyPress>", movement_handler)

def stop_pad(event):
    global LEFT_PAD_SPEED, RIGHT_PAD_SPEED
    if event.keysym in "ws":
        LEFT_PAD_SPEED = 0
    elif event.keysym in ("Up", "Down"):
        RIGHT_PAD_SPEED = 0


c.bind("<KeyRelease>", stop_pad)






BALL_SPEED_UP = 1.04
BALL_MAX_SPEED = 20
BALL_X_SPEED = 10
BALL_Y_SPEED = 10
right_line_distance = WIDTH - R_W

INITIAL_SPEED = 10
def bounce(action):
    global BALL_X_SPEED, BALL_Y_SPEED
    if action == "strike":
        BALL_Y_SPEED = random.randrange(-10, 10)
        if abs(BALL_X_SPEED) < BALL_MAX_SPEED:
            BALL_X_SPEED *= -BALL_SPEED_UP
        else:
            BALL_X_SPEED = -BALL_X_SPEED
    else:
        BALL_Y_SPEED = -BALL_Y_SPEED



def run_ball():
    global BALL_X_SPEED
    c.coords(BALL, WIDTH/2-BALL_RADIUS/2,
             HEIGHT/2-BALL_RADIUS/2,
             WIDTH/2+BALL_RADIUS/2,
             HEIGHT/2+BALL_RADIUS/2)
    BALL_X_SPEED = -(BALL_X_SPEED * -INITIAL_SPEED) / abs(BALL_X_SPEED)




def move_ball():
    ball_left, ball_top, ball_right, ball_bot = c.coords(BALL)
    ball_center = (ball_top + ball_bot) / 2
    if ball_right + BALL_X_SPEED < right_line_distance and \
            ball_left + BALL_X_SPEED > R_W:
        c.move(BALL, BALL_X_SPEED, BALL_Y_SPEED)

    elif ball_right == right_line_distance or ball_left == R_W:
        if ball_right > WIDTH / 2:
            if c.coords(RIGHT_PAD)[1] < ball_center < c.coords(RIGHT_PAD)[3]:
                bounce("strike")
            else:
                run_ball()

        else:
            if c.coords(LEFT_PAD)[1] < ball_center < c.coords(LEFT_PAD)[3]:
                bounce("strike")
            else:
                run_ball()
    else:
        if ball_right > WIDTH / 2:
            c.move(BALL, right_line_distance-ball_right, BALL_Y_SPEED)
        else:
            c.move(BALL, -ball_left+R_W, BALL_Y_SPEED)
    if ball_top + BALL_Y_SPEED < 0 or ball_bot + BALL_Y_SPEED > HEIGHT:
        bounce("ricochet")

root.mainloop()