#!/usr/bin/env python
# -*- Mode: python -*-
#
# positron - main frontend
#
# Copyright (C) 2003, Xiph.org Foundation
#
# This file is part of positron.
#
# This program is free software; you can redistribute it and/or modify it 
# under the terms of a BSD-style license (see the COPYING file in the 
# distribution).
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the license for more details.

import sys
from os import path
import getopt
from positron.config import Config
from positron.neuros import Neuros
import positron.neuros
import positron.cmd_add
import positron.cmd_del
import positron.cmd_list
import positron.cmd_clear
import positron.cmd_pack
import positron.cmd_sync
import positron.cmd_config
import positron.cmd_rebuild

import positron.ports

version = "positron version 1.0"

# Hash table of commands.  The first value in the tuple is the module
# where the command is stored.  The second value is the order to
# display commands in from usage()
# Note: "config" is not run using the normal command dispatcher
commands = { "add"     : (positron.cmd_add,     1),
             "sync"    : (positron.cmd_sync,    2),
             "del"     : (positron.cmd_del,     3),
             "config"  : (positron.cmd_config,  4),
             "rebuild" : (positron.cmd_rebuild, 5),
             "list"    : (positron.cmd_list,    6),
             "clear"   : (positron.cmd_clear,   7),
             "pack"    : (positron.cmd_pack,    8) }

# For sorting according to the display order element in the tuple
def cmp_func(a, b):
    return a[1] - b[1]

def usage():
    print version, "- Neuros portable music player sync tool"
    print
    
    cmds = commands.values()
    cmds.sort(cmp_func)

    for (item, order) in cmds:
        first_line = item.__doc__.split("\n")[0]
        print "  ",first_line

    print
    print "For more help on a specific command, type: positron help <command>"

def oggvorbis_sanity_check():
    try:
        import ogg.vorbis
    except ImportError:
        print """
********************************************************************
WARNING: You have enabled Ogg Vorbis support in your configuration
file, but do not have pyogg and pyvorbis installed, so Ogg
Vorbis support is not available.

Please go to the positron homepage to download pyogg and pyvorbis:

http://www.xiph.org/positron/
********************************************************************
"""

def main(argv):
    options = "c:hm:v"
    long_options = ("config=", "help", "mount-point=", "version")

    # parse global options
    try:
        opts, remaining = getopt.getopt(argv[1:], options, long_options)
    except getopt.GetoptError, e:
        print "Error:", e
        usage()
        sys.exit()

    config = Config()
    mountpoint = None
    for o,a in opts:
        if o in ("-v", "--version"):
            print version
            sys.exit()
        elif o in ("-h", "--help"):
            usage()
            sys.exit()
        elif o in ("-c", "--config"):
            config.set_config_dir(a)
        elif o in ("-m", "--mount-point"):
            mountpoint = a

    if len(remaining) == 0:
        usage()
        sys.exit(0)
    elif remaining[0] == "help":
        if len(remaining) > 1:
            if commands.has_key(remaining[1]):
                (cmd, display_order) = commands[remaining[1]]
                print cmd.__doc__
            else:
                    print remaining[1], "is not a valid command."
            sys.exit(0)
        else:
            usage()
            sys.exit(0)
    elif remaining[0] == "config":
        # Config gets special treatment because everything might be screwed
        # up until we run it
        (cmd, display_order) = commands["config"]
        cmd.run(config, None, remaining[1:])
        sys.exit(0)
        

    # Read configuration
    try:
        config.read_config_file()
    except IOError,e:
        print "Error opening config file:\n  %s" \
              % (e,)
        print "You can create or modify the configuration file with \"positron config\""
        sys.exit(1)

    # Allow mountpoint override
    if mountpoint != None:
        config.mountpoint = mountpoint

    # Sanity check
    if not config.mountpoint:
        print "Error: Neuros mountpoint not set with -m and not present in config file."
        print "Please use \"positron config\" to create or modify the configuration."
        sys.exit(1)

    try:
        myNeuros = Neuros(config.mountpoint)

        if commands.has_key(remaining[0]):
            (cmd, display_order) = commands[remaining[0]]
            cmd.run(config, myNeuros, remaining[1:])

            if config.oggvorbis_support:
                oggvorbis_sanity_check()
        else:
            print remaining[0], "is not a valid command."
            print
            usage()

        exit_value = 0
    except positron.neuros.Error, e:
        print "Error:", e
        exit_value = 1

    sys.exit(exit_value)

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