#! /usr/bin/python3 -t 

MODULE_NAME = "mformula_args"
MODULE_DESC = "Command line parsing for molecular diagrams"
MODULE_VERS = "1.0"

MODULE_COPYRIGHT = "Copyright © 2010-02-18 by the State University of Campinas (UNICAMP)"

import sys, os, math, copy
from math import sqrt,sin,cos,pi
import rn
import argparser; from argparser import ArgParser

ARG_HELP = \
  "[ -style [B1|B2|S1] ] [ -hydro [0|1] ]";
ARG_INFO = \
  """The '-style' option selects ball style ('B1','B2') or symbolic skeleton ('S1'). 
  For some compounds, the '-hydro' option specifies whether any hydrogen 
  atoms attached to carbons should be omitted (0) or shown (1)."""
    
def parse(ppopt) :
  "Parses the command line argument, returns dictionary with keys 'style', 'hydro', etc.\n"

  if ppopt == None :
    pp = ArgParser(sys.argv, sys.stderr, ARG_HELP, ARG_INFO);
  else :
    pp = ppopt;
    
  options = {}

  # Ignore Python library options:
  while pp.keyword_present("-m") : pp.get_next(); pp.get_next();

  if pp.keyword_present("-style") :
    style = pp.get_next();
  else :
    style = 'B'
  options['style'] = style

  if pp.keyword_present("-hydro") :
    hydro = int(pp.get_next());
  else :
    hydro = None
  options['hydro'] = hydro

  if (ppopt == None) :
    pp.finish();

  return options
  #- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -