import tkinter
import random

fnt1 = ('Times New Roman', 24)
fnt2 = ('Times New Roman', 50)
index = 0
timer = 0
score = 0
bg_pos = 0
px = 240
py = 540
METEO_MAX = 30  
mx = [0] * METEO_MAX
my = [0] * METEO_MAX

key = ''
koff = False

def key_down(e):
    global key, koff
    key = e.keysym
    koff = False

def key_up(e):
    global koff
    koff = True

def main():
    global key, koff, index, timer, score, bg_pos, px
    timer = timer + 1
    bg_pos = (bg_pos + 1) % 640
    canvas.delete('SCREEN')
    canvas.create_image(240, bg_pos - 320, image = img_bg, tag = 'SCREEN')
    canvas.create_image(240, bg_pos + 320, image = img_bg, tag = 'SCREEN')
    if index == 0:
        canvas.create_text(240, 240, text = 'METEOR', fill = 'gold', font = fnt2, tag = 'SCREEN')
        canvas.create_text(240, 480, text = 'Press [SPACE] Key', fill = 'lime', font = fnt1, tag = 'SCREEN')
        if key == 'space':
            score = 0
            px = 240
            init_enemy()
            index = 1
    if index == 1:
        score = score + 1
        move_player()
        move_enemy()
    if index == 2:
        move_enemy()
        canvas.create_text(240, timer * 4, text = 'GAME OVER', fill = 'red', font = fnt2, tag = 'SCREEN')
        if timer == 60:
            index = 0
            timer = 0
    canvas.create_text(240, 30, text = 'SCORE ' + str(score), fill = 'white', font = fnt1, tag = 'SCREEN')
    if koff == True:
        key = ''
        koff = False
    root.after(50, main)

def hit_check(x1, y1, x2, y2):
    if((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) < 36 * 36):
        return True
    return False

def init_enemy():
    for i in range(METEO_MAX):
        mx[i] = random.randint(0, 480)
        my[i] = random.randint(-640, 0)

def move_enemy():
    global index, timer
    for i in range(METEO_MAX):
        my[i] = my[i] + 6 + i/5
        if my[i] > 660:
            mx[i] = random.randint(0, 480)
            my[i] = random.randint(-640, 0)
        if index == 1 and hit_check(px, py, mx[i], my[i]) == True:
            index = 2
            timer = 0
        canvas.create_image(mx[i], my[i], image = img_enemy, tag = 'SCREEN')

def move_player():
    global px
    if key == 'Left' and px > 30:
        px = px - 10
    if key == 'Right' and px < 450:
        px = px + 10
    canvas.create_image(px, py, image = img_player[timer % 2], tag = 'SCREEN')

root = tkinter.Tk()
root.title('Meteor')
root.bind('<KeyPress>', key_down)
root.bind('<KeyRelease>', key_up)
canvas = tkinter.Canvas(width = 480, height = 640)
canvas.pack()

img_player = [
    tkinter.PhotoImage(file = 'images/starship0.png'),
    tkinter.PhotoImage(file = 'images/starship1.png')
]

img_enemy = tkinter.PhotoImage(file = 'images/meteo.png')
img_bg = tkinter.PhotoImage(file = 'images/cosmo.png')
main()
root.mainloop()