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


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


def berechneflugbahn(cow, xmin, xmax, ymin, ymax, startwinkel, startgeschwindigkeit, starthoehe):
    x = 0
    y = x**2
    # in scala the resulting coordinates will be returned
    scala = []
    erde = 9.81
    mond = 1.6
    jupiter = 24
    gravitation = erde
    starthoehe = 0
    startwinkel = 26 * deg2rad
    startgeschwindigkeit = 36
    loeschen = "y"

    # Calculate time of flight
    flugdauer = startgeschwindigkeit * sin(startwinkel) / gravitation
    schlafdauer = flugdauer / xmax
    # Calculate maximum height
    hoehe = 0.5 * gravitation * flugdauer**2 + starthoehe

    # calculate length of flight
    wurfweite = (
        startgeschwindigkeit
        * cos(startwinkel)
        * (startgeschwindigkeit * sin(startwinkel) + sqrt(startgeschwindigkeit**2 * sin(startwinkel) ** 2 + 2 * gravitation * starthoehe))
    ) / gravitation

    # cowlength is 2, if cow is an UTF8-Icon, otherwise 1
    for x in range(xmin, xsteps - 1, cowlength):
        # the formula, which generates the y position for the corresponding x, shamelessly ripped from some schoolbook and modified.
        yold = y
        y = (-(gravitation / (2 * startgeschwindigkeit**2 * cos(startwinkel) ** 2)) * x**2) + (tan(startwinkel) * x + starthoehe)

        # Ensure, that nothing has to be drawn outside the viewport
        if y < ymax and y > ymin:
            # Stash awa the coordinates into scala, which will be returned
            scala += [x, int(y * 10 + 5) / 10]
        else:
            scala += [x, 0]

        xold = x

    return scala


# berechneflugbahn(cow, xmin, xmax, ymin, ymax, startwinkel, startgeschwindigkeit, starthoehe):

cow = "🦝"
cowlength = len(cow)
xmax = 157
ymax = 38
ymin = 0
xmin = 0
xold = xmin
# pi is not defined by default
pi = 3.1416
deg2rad = pi / 180
xsteps = xmax
wurfweite = 0
startwinkel = (34 / deg2rad,)
startgeschwindigkeit = 23
starthoehe = 0
print(berechneflugbahn(cow, xmin, xmax, ymin, ymax, startwinkel, startgeschwindigkeit, starthoehe))