#!/usr/bin/env python

# Copyright (c) 2009 Andreas Balogh
# See LICENSE for details.

""" new module template """

# system imports

import logging
import sys
import os
import getopt

# local imports

# constants

# globals

LOG = logging.getLogger()

logging.basicConfig(level=logging.DEBUG,
                    format="%(asctime)s %(levelname).3s %(process)d:%(thread)d %(message)s",
                    datefmt="%H:%M:%S")

# definitions

class Usage(Exception):
    pass

class Error(Exception):
    pass

def main(argv = [__name__]):
    try:
        # check for parameters
        LOG.debug("starting '%s %s'", argv[0], " ".join(argv[1:]))
        script_name = os.path.basename(argv[0])
        try:
            opts, args = getopt.getopt(argv[1:], "hfgp", \
                         ["help", "force", "gui", "preview"])
        except getopt.error, err:
            raise Usage(err)
        LOG.debug("opts: %s, args: %s", opts, args)
        o_overwrite = False
        o_gui = False
        o_preview = False
        for o, a in opts:
            if o in ("-h", "--help"):
                usage(script_name)
                return 0
            elif o in ("-f", "--force"):
                o_overwrite = True
            elif o in ("-p", "--preview"):
                o_preview = True
            elif o in ("-g", "--gui"):
                o_gui = True
        if len(args) == 2:
            src_dir = args[0]
            dest_dir = args[1]
        elif len(args) == 1 :
            src_dir = args[0]
            dest_dir = args[0]
        elif len(args) == 0 :
            src_dir = None
            dest_dir = None
            o_gui = True
        else:
            raise Usage("more than two arguments provided")
        # call method with appropriate arguments
        if src_dir and not os.path.exists(src_dir):
            raise Error("Source directory not found [%s], aborting" % (src_dir, ))
        if dest_dir and not os.path.exists(dest_dir):
            LOG.warn("Destination directory not found [%s]", dest_dir)
            if not o_preview:
                LOG.info("Creating destination directory [%s]", dest_dir)
                os.makedirs(dest_dir)
        if o_gui:
            gui(src_dir, dest_dir, o_overwrite)
        else:
            cli(src_dir, dest_dir, o_preview, o_overwrite)
        LOG.debug("Done.")
        return 0
    except Error, err:
        LOG.error(err)
        return 1
    except Usage, err:
        LOG.error(err)
        LOG.info("for usage use -h or --help")
        return 2


def gui(src_dir, dest_dir, o_overwrite):
    """ graphical user interface """
    print src_dir, dest_dir, o_overwrite


def cli(src_dir, dest_dir, o_preview, o_overwrite):
    """ command line interface """
    print src_dir, dest_dir, o_preview, o_overwrite


def usage(script_name):
    print
    print "usage: %s [options] [src_dir [dest_dir]]" % (script_name,)
    print """
  src_dir      source directory to search for MOD/MOI
  dest_dir     destination directory for MPG files
options:
  -h, --help    show this help message and exit
  -f, --force   override files with same name in destination directory
  -g, --gui     force interactive mode
  -p, --preview preview only, don't copy, don't create non-existent directories
"""


if __name__ == "__main__":
    sys.exit(main(sys.argv))