#!/usr/bin/env python3
import fileinput

def printf(string):
  print(string,end='')

def convert(line):
  """Convert a string to a list of tuples, each a token"""
  # TODO: preserve the lack of whitespace before a backslash.
  split = line.replace('\\', ' \\').split()
  out = ''
  if len(split) == 0:
    return out
  elif split[0] in ['\\mt1','\\mt','\\ms']:
    return '\n# ' + ' '.join(split[1:])
  # TODO: parse as word for title tags in title line
  elif split[0] in ['\\mt2','\\s']:
    return '\n## ' + ' '.join(split[1:])
  elif split[0] in ['\\mt3']:
    return '\n### ' + ' '.join(split[1:])
  elif split[0] == '\\b':
    return '\n'
  elif split[0] == '\\rem':
    return out
  skip = 0
  for word in split:
    if skip > 0:
      skip = skip - 1
      continue
    if word in ['\\v', '\\c']:
      skip = 1
    elif word in ['\\p','\\m']:
      out += '\n'
    elif word in ['\\q']:
      out += '\n> '
    elif word in ['\\wj','\\wj*']:
      continue
    else:
      out += word + ' '
  return out

def main():
  """Read usfm from stdin, output gemtext to stdout
     ./usfm2gmi <in.usfm >out.md
  """
  for line in fileinput.input():
    gmi = convert(line)
    printf(gmi)

if __name__ == '__main__':
  main()