#!/usr/bin/python3
# -*- coding: utf-8 -*-

""" Ein hilfloser Versuch, Tasteneingaben abzufragen. Man kann auch in Python C schreiben. Ein Thread wär evtl besser. """

import os, sys, termios, tty, time, random
from math import sin, cos

esc = chr(27)
bracket = chr(91)
c_up = chr(65)
c_down = chr(66)
c_right = chr(67)
c_left = chr(68)
clear = "'\x1b[2J\x1b[H"
car = "🚜"
replstring = " "
fd = sys.stdin.fileno()
remember_attributes = termios.tcgetattr(fd)


termsize_xy = os.get_terminal_size()
xmax = termsize_xy[0] - 1
ymax = termsize_xy[1]
x, xold, y, yold = xmax / 2, xmax / 2, ymax - 1, ymax - 1
ymin = 1
xmin = 1
street = "#                              #"
streetlen = len(street)
pi = 3.1416
deg2rad = pi / 180
curvelen = 40
toggle = 1
curvemax = random.randint(len(street) + 1, xmax - len(street))
taste = ""
z = 90

x = int((sin(curvelen * deg2rad) * cos(xmax - curvelen * deg2rad) + 1) * (xmax / 2))


def curpos(x, y):
    print("\033[%d;%dH" % (y, x), end="", flush=True)


def cursoroff():
    sys.stdout.write("\033[?25l")


def cursoron():
    sys.stdout.write("\033[?25h")


def getkey():
    getkey_buffer = 1
    tty.setraw(sys.stdin.fileno())
    taste = sys.stdin.read(getkey_buffer)
    termios.tcsetattr(fd, termios.TCSADRAIN, remember_attributes)
    return taste


print(clear)
cursoroff()

while taste != "x" and taste != "q":
    taste = getkey()

    if taste == esc:
        taste = getkey()
        ########## Print car
        if taste == bracket:
            taste = getkey()
            yold = y
            xold = x
            if taste == c_right:
                if x < xmax and y < ymax:
                    x += 1
            elif taste == c_left:
                if x >= xmin:
                    x -= 1
            curpos(x, y)
            print(car, end="")
            curpos(xold, yold - 1)
            print(replstring, end="")

        ####### print street
        curvelen = int(curvelen + toggle) % 360

        if curvelen <= 40 or curvelen == curvemax:
            curvemax = random.randint(len(street) * 3, 180)
            z += toggle
            toggle *= -1
            curvelen = int(curvelen + toggle) % 360
        streetpos = int((sin(curvelen * deg2rad) * cos(xmax - curvelen * deg2rad) + 1) * (xmax / 2))
        curvelen += toggle % 360
        curpos(streetpos, ymax)
        print(street)


cursoron()
sys.exit("Schulz nun.")