dumb

#!/usr/bin/env python
"""
dumb

this is pretty dumb

Usage:
    dumb <file_name>

Options:
    -h --help     Show this screen.

"""
import time
import os
import sys

from blessings import Terminal
from docopt import docopt


SLEEPTIME = 0.07


def main(file_name):
    lines = _get_lines(file_name)
    term = Terminal()
    while True:
        for i in range(len(lines)):
            with term.fullscreen():
                _print_data(i, lines)
            time.sleep(SLEEPTIME)


def _print_data(index, lines):
    screen = ''
    for i, line in enumerate(lines):
        if i == index - 1:
            screen += " "
        elif i == index:
            screen += "  "
        elif i == index + 1:
            screen += " "
        screen += line
    print screen


def _get_lines(file_name):
    with open(file_name) as fp:
        return fp.readlines()


if __name__ == '__main__':
    args = docopt(__doc__)
    file_name = args['<file_name>']
    if not os.path.exists(file_name):
        print "Error: file: " + file_name + " does not exist"
        sys.exit(1)
    main(file_name)