#!/usr/bin/env python
# coding=utf-8
"""A simple example demonstrating the following:
    1) How arguments and options get parsed and passed to commands
    2) How to change what syntax get parsed as a comment and stripped from the arguments

This is intended to serve as a live demonstration so that developers can experiment with and understand how command
and argument parsing is intended to work.
"""
import pyparsing
import cmd2
from cmd2 import options, make_option


class ArgumentAndOptionPrinter(cmd2.Cmd):
    """ Example cmd2 application where we create commands that just print the arguments they are called with."""

    def __init__(self):
        # Uncomment this line to disable Python-style comments but still allow C-style comments
        # self.commentGrammars = pyparsing.Or([pyparsing.cStyleComment])

        # Make sure to call this super class __init__ after setting commentGrammars and not before
        cmd2.Cmd.__init__(self)

    def do_aprint(self, arg):
        """Print the argument string this basic command is called with."""
        print('aprint was called with argument: {!r}'.format(arg))

    @options([make_option('-p', '--piglatin', action="store_true", help="atinLay"),
              make_option('-s', '--shout', action="store_true", help="N00B EMULATION MODE"),
              make_option('-r', '--repeat', type="int", help="output [n] times")], arg_desc='positional_arg_string')
    def do_oprint(self, arg, opts=None):
        """Print the options and argument list this options command was called with."""
        print('oprint was called with the following\n\toptions: {!r}\n\targuments: {!r}'.format(opts, arg))


if __name__ == '__main__':
    app = ArgumentAndOptionPrinter()
    app.cmdloop()