#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Copyright (c) 2009, 2010 Efrim <efrim@azylum.org> {{{
#
#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
#  }}}


import sys

from lib.mpdclass import MPDClass
from lib.startop import StartOpt

NAME = 'crop'
VERSION = '0.1'
USAGE = 'USAGE:  %prog [--help] | [ <n> ]'

class Crop(StartOpt, MPDClass):
    """
    """
    script_info = dict({
        'version': VERSION,
        'prog_name': NAME,
        'description': 'Keep <n> tracks before currently played, removed others. Default is to keep 6 tracks.',
        'usage': USAGE,
        })

    def __init__(self):
        """"""
        StartOpt.__init__(self, self.__class__.script_info, [])
        MPDClass.__init__(self)
        self.nb_tracks = 6
        self._get_arg()
        self._run()

    def _get_arg(self):
        """"""
        if not self.cli_args:
            return True
        try:
            self.nb_tracks = int(self.cli_args[0])
        except ValueError, err:
            self.parser.error('invalid argument, not a natural number? (%s)' % err)

    def _run(self):
        """"""
        print 'Connecting %s:%i' % (self.cli_options.host, self.cli_options.port)
        print 'Keeping %i tracks' % self.nb_tracks
        self.mpdConnect()
        current_pos = int(self.client.currentsong().get('pos'))
        if current_pos <=  self.nb_tracks:
            self.client.disconnect()
            sys.exit(0)
        while current_pos > self.nb_tracks:
            self.client.delete(0)
            current_pos = int(self.client.currentsong().get('pos'))
        self.client.disconnect()
        sys.exit(0)


# Script starts here
if __name__ == '__main__':
    try:
        Crop()
    except KeyboardInterrupt:
        sys.stdout.write('exit')

# VIM MODLINE
# vim: ai ts=4 sw=4 sts=4 expandtab