import random

from curtsies import FullscreenWindow, Input, FSArray
from curtsies.fmtfuncs import red, bold, green, on_blue, yellow

if __name__ == '__main__':
    print(yellow('this prints normally, not to the alternate screen'))
    with FullscreenWindow() as window:
        with Input() as input_generator:
            msg = red(on_blue(bold('Press escape to exit')))
            a = FSArray(window.height, window.width)
            a[0:1, 0:msg.width] = [msg]
            window.render_to_terminal(a)
            for c in input_generator:
                if c == '<ESC>':
                    break
                elif c == '<SPACE>':
                    a = FSArray(window.height, window.width)
                else:
                    s = repr(c)
                    row = random.choice(range(window.height))
                    column = random.choice(range(window.width-len(s)))
                    color = random.choice([red, green, on_blue, yellow])
                    a[row, column:column+len(s)] = [color(s)]
                window.render_to_terminal(a)