import os

from gooey.gui.util.quoting import quote


def checkbox(metadata, value):
    return metadata['commands'][0] if value else None


def radioGroup(metadata, value):
    # TODO
    try:
        return self.commands[self._value.index(True)][0]
    except ValueError:
        return None


def multiFileChooser(metadata, value):
    paths = ' '.join(quote(x) for x in value.split(os.pathsep) if x)
    if metadata['commands'] and paths:
        return u'{} {}'.format(metadata['commands'][0], paths)
    return paths or None


def textArea(metadata, value):
    if metadata['commands'] and value:
        return '{} {}'.format(metadata['commands'][0], quote(value.encode('unicode_escape')))
    else:
        return quote(value.encode('unicode_escape')) if value else ''


def commandField(metadata, value):
    if metadata['commands'] and value:
        return u'{} {}'.format(metadata['commands'][0], value)
    else:
        return value or None


def counter(metatdata, value):
    '''
    Returns
      str(option_string * DropDown Value)
      e.g.
      -vvvvv
    '''
    if not str(value).isdigit():
        return None
    arg = str(metatdata['commands'][0]).replace('-', '')
    repeated_args = arg * int(value)
    return '-' + repeated_args


def dropdown(metadata, value):
    if value == 'Select Option':
        return None
    elif metadata['commands'] and value:
        return u'{} {}'.format(metadata['commands'][0], quote(value))
    else:
        return quote(value) if value else ''


def general(metadata, value):
    if metadata['commands'] and value:
        if not metadata['nargs']:
            v = quote(value)
        else:
            v = value
        return u'{0} {1}'.format(metadata['commands'][0], v)
    else:
        if not value:
            return None
        elif not metadata['nargs']:
            return quote(value)
        else:
            return value