#!/usr/bin/python
# encoding: utf-8
#
# Copyright 2009-2011 Greg Neagle.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#      http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
manifestutil

Created by Greg Neagle on 2011-03-04.
"""

import fnmatch
import shlex
import subprocess
import sys
import optparse
import os
import readline

try:
    from munkilib import FoundationPlist as plistlib
except ImportError:
    try:
        import FoundationPlist as plistlib
    except ImportError:
        # maybe we're not on an OS X machine...
        print >> sys.stderr, ("WARNING: FoundationPlist is not available, "
                              "using plistlib instead.")
        import plistlib
        
try:
    from munkilib.munkicommon import get_version
except ImportError:
    # munkilib is not available
    def get_version():
        '''Placeholder if munkilib is not available'''
        return 'UNKNOWN'
        
def getInstallerItemNames(cataloglist):
    '''Returns a list of unique installer item (pkg) names
    from the given list of catalogs'''
    item_list = []
    catalogs_path = os.path.join(pref('repo_path'), 'catalogs')
    for filename in os.listdir(catalogs_path):
        if filename in cataloglist:
            try:
                catalog = plistlib.readPlist(
                    os.path.join(catalogs_path, filename))
            except Exception:
                # skip items that aren't valid plists
                # or that we can't read
                pass
            else:
                item_list.extend([item['name'] 
                             for item in catalog 
                             if not item.get('update_for')])
    item_list = list(set(item_list))
    item_list.sort()
    return item_list


def getManifestNames():
    '''Returns a list of available manifests'''
    manifests_path = os.path.join(pref('repo_path'), 'manifests')
    manifests = []
    for dirpath, dirnames, filenames in os.walk(manifests_path):
        subdir = dirpath[len(manifests_path):]
        for name in filenames:
            if name.startswith("."):
                # don't process these
                continue
            manifests.append(os.path.join(subdir, name).lstrip('/'))
    return manifests
    

def getCatalogs():
    '''Returns a list of available catalogs'''
    catalogs_path = os.path.join(pref('repo_path'), 'catalogs')
    catalogs = []
    for name in os.listdir(catalogs_path):
        if name.startswith(".") or name == 'all':
            # don't process these
            continue
        try:
            catalog = plistlib.readPlist(
                os.path.join(catalogs_path, name))
        except Exception:
            # skip items that aren't valid plists
            pass
        else:
            catalogs.append(name)
    return catalogs
    
    
def getManifestPkgSections():
    '''Returns a list of manifest sections that can contain pkg names'''
    return ['managed_installs',
            'managed_uninstalls',
            'managed_updates',
            'optional_installs']
            
            
def printplistitem(label, value, indent=0):
    """Prints a plist item in an 'attractive' way"""
    indentspace = '    '
    if type(value) == type(None):
        print indentspace*indent, '%s: !NONE!' % label
    elif type(value) == list or type(value).__name__ == 'NSCFArray':
        if label:
            print indentspace*indent, '%s:' % label
        index = 0
        for item in value:
            index += 1
            printplistitem('', item, indent+1)
    elif type(value) == dict or type(value).__name__ == 'NSCFDictionary':
        if label:
            print indentspace*indent, '%s:' % label
        for subkey in value.keys():
            printplistitem(subkey, value[subkey], indent+1)
    else:
        if label:
            print indentspace*indent, '%s: %s' % (label, value)
        else:
            print indentspace*indent, '%s' % value


def printplist(plistdict):
    """Prints plist dictionary in a pretty(?) way"""
    keys = list(plistdict.keys())
    keys.sort()
    for key in keys:
        printplistitem(key, plistdict[key])


def getManifest(manifest_name):
    '''Gets the contents of a manifest'''    
    manifest_path = os.path.join(
        pref('repo_path'), 'manifests', manifest_name)
    if os.path.exists(manifest_path):
        try:
            return plistlib.readPlist(manifest_path)
        except Exception, errmsg:
            print >> sys.stderr, \
                'Could not read manifest %s' % manifest_name
            return None
    else:
           print >> sys.stderr, 'Manifest %s doesn\'t exist!' % manifest_name
           return None


def saveManifest(manifest_dict, manifest_name, overwrite_existing=False):
    '''Saves a manifest to disk'''
    manifest_path = os.path.join(
        pref('repo_path'), 'manifests', manifest_name)
    if not overwrite_existing:
        if os.path.exists(manifest_path):
            print >> sys.stderr, '%s already exists!' % manifest_name
            return False
    try:
        plistlib.writePlist(manifest_dict, manifest_path)
        return True
    except Exception, errmsg:
        print >> sys.stderr, 'Saving %s failed: %s' % (manifest_name, errmsg)
        return False


def repoAvailable():
    """Checks the repo path for proper directory structure.
    If the directories look wrong we probably don't have a
    valid repo path. Returns True if things look OK."""
    repo_path = pref('repo_path')
    if not repo_path:
        print >> sys.stderr, 'No repo path specified.'
        return False
    if not os.path.exists(repo_path):
        mountRepoCLI()
    if not os.path.exists(repo_path):
        return False
    for subdir in ['catalogs', 'manifests', 'pkgs', 'pkgsinfo']:
        if not os.path.exists(os.path.join(repo_path, subdir)):
            print >> sys.stderr, "%s is missing %s" % (repo_path, subdir)
            return False
    # if we get this far, the repo path looks OK
    return True


def mountRepoCLI():
    """Attempts to connect to the repo fileshare"""
    global WE_MOUNTED_THE_REPO
    repo_path = pref('repo_path')
    repo_url = pref('repo_url')
    if os.path.exists(repo_path):
        return
    os.mkdir(repo_path, 0777)
    print 'Attempting to mount fileshare %s:' % repo_url
    cmd = ['/sbin/mount_afp', '-i', repo_url, repo_path]
    retcode = subprocess.call(cmd)
    if retcode:
        os.rmdir(repo_path)
    else:
        WE_MOUNTED_THE_REPO = True


def unmountRepoCLI():
    """Attempts to unmount the repo fileshare"""
    repo_path = pref('repo_path')
    if not os.path.exists(repo_path):
        return
    cmd = ['/sbin/umount', repo_path]
    return subprocess.call(cmd)


def cleanupAndExit(exitcode):
    result = 0
    if WE_MOUNTED_THE_REPO:
        answer = raw_input('Unmount the repo fileshare? [y/n] ')
        if answer.lower().startswith('y'):
            result = unmountRepoCLI()
    exit(exitcode or result)


_prefs = {}
def pref(prefname):
    """Returns a preference for prefname"""
    global _prefs
    if not _prefs:
        try:
            _prefs = plistlib.readPlist(PREFSPATH)
        except Exception:
            pass
    if prefname in _prefs:
        return _prefs[prefname]
    else:
        return None
        

def updateCachedManifestList():
    '''Updates our cached list of available manifests so our completer
    will return all the available manifests.'''
    CMD_ARG_DICT['manifests'] = getManifestNames()


##### subcommand functions #####

class MyOptParseError(Exception):
    '''Exception for our custom option parser'''
    pass


class MyOptionParser(optparse.OptionParser):
    '''Custom option parser that overrides the error handler'''
    def error(self, msg):
        """error(msg : string)

        """
        self.print_usage(sys.stderr)
        raise MyOptParseError('option error: %s' % msg)


def version(args):
    '''Prints version number'''
    if len(args) != 0:
        print >> sys.stderr, 'Usage: version'
        return 22 # Invalid argument
    print get_version()
    return 0


def list_catalogs(args):
    '''Prints the names of the available catalogs'''
    if len(args) != 0:
        print >> sys.stderr, 'Usage: list-catalogs'
        return 22 # Invalid argument
    for item in getCatalogs():
        print item
    return 0


def list_catalog_items(args):
    '''Lists items in the given catalogs'''
    if len(args) == 0:
        print >> sys.stderr, \
            'Usage: list-catalog-items CATALOG_NAME [CATALOG_NAME ...]'
        return 1 # Operation not permitted
    available_catalogs = getCatalogs()
    for catalog in args:
        if catalog not in available_catalogs:
            print >> sys.stderr, '%s: no such catalog!' % catalog
            return 2 # No such file or directory
    for pkg in getInstallerItemNames(args):
        print pkg
    return 0


def list_manifests(args):
    '''Prints names of available manifests, filtering on arg[0]
    similar to Unix file globbing'''
    p = MyOptionParser()
    p.set_usage(
        'list-manifests [FILE_NAME_MATCH_STRING]')
    if len(args) == 1:
        list_filter = args[0]
    elif len(args) == 0:
        list_filter = '*'
    else:
        p.print_usage(sys.stderr)
        return 7 # Argument list too long
    for item in getManifestNames():
        if fnmatch.fnmatch(item, list_filter):
            print item
    return 0


def find(args):
    '''Find text in manifests, optionally searching just a specific manifest
    section specified by keyname'''
    p = MyOptionParser()
    p.set_usage(
        'find FIND_TEXT [--section SECTION_NAME]')
    p.add_option('--section',
        metavar='SECTION_NAME',
        help='Section of the manifest to search for FIND_TEXT')
    try:
        options, arguments = p.parse_args(args)
    except MyOptParseError, errmsg:
        print >> sys.stderr, str(errmsg)
        return 22 # Invalid argument
    if not options.section and len(arguments) == 2:
        options.section = arguments[1]
        del arguments[1]
    if len(arguments) != 1:
        p.print_usage(sys.stderr)
        return 7 # Argument list too long
    findtext = arguments[0]
    keyname = options.section

    manifests_path = os.path.join(pref('repo_path'), 'manifests')
    count = 0 
    for name in getManifestNames():
        pathname = os.path.join(manifests_path, name)
        manifest = plistlib.readPlist(pathname)
        if keyname:
            if keyname in manifest:
                value = manifest[keyname]
                if type(value) == list or type(value).__name__ == 'NSCFArray':
                    for item in value:
                        if findtext.upper() in item.upper():
                            print '%s: %s' % (name, item)
                            count += 1
                            break
                elif findtext.upper() in value.upper():
                    print '%s: %s' % (name, value)
                    count += 1
        else:
            for key in manifest.keys():
                value = manifest[key]
                if type(value) == list or type(value).__name__ == 'NSCFArray':
                    for item in value:
                        if findtext.upper() in item.upper():
                            print '%s (%s): %s' % (name, key, item)
                            count += 1
                            break
                elif findtext.upper() in value.upper():
                    print '%s (%s): %s' % (name, key, value)
                    count += 1
                    
    print '%s items found.' % count
    return 0


def display_manifest(args):
    '''Prints contents of a given manifest'''
    if len(args) != 1:
        print >> sys.stderr, 'Usage: display-manifest MANIFESTNAME'
        return 7 # Argument list too long
    manifestname = args[0]
    manifest = getManifest(manifestname)
    if manifest:
        printplist(manifest)
        return 0
    else:
        return 2 # No such file or directory
        
        
def new_manifest(args):
    '''Creates a new, empty manifest'''
    if len(args) != 1:
        print >> sys.stderr, 'Usage: new-manifest MANIFESTNAME'
        return 7 # Argument list too long
    manifest_name  = args[0]
    manifest = {'catalogs': [],
                'included_manifests': [],
                'managed_installs': [],
                'managed_uninstalls': []}
    if saveManifest(manifest, manifest_name):
        updateCachedManifestList()
        return 0
    else:
        return 1 # Operation not permitted


def copy_manifest(args):
    '''Copies one manifest to another'''
    if len(args) != 2:
        print >> sys.stderr, \
            'Usage: copy-manifest SOURCE_MANIFEST DESTINATION_MANIFEST'
        return 7 # Argument list too long
    source_manifest = args[0]
    dest_manifest = args[1]
    manifest = getManifest(source_manifest)
    if manifest and saveManifest(manifest, dest_manifest):
        updateCachedManifestList()
        return 0
    else:
        return 1 # Operation not permitted
        
        
def add_pkg(args):
    '''Adds a package to a manifest.'''
    p = MyOptionParser()
    p.set_usage(
        'add-pkg PKGNAME --manifest MANIFESTNAME [--section SECTIONNAME]')
    p.add_option('--manifest')
    p.add_option('--section', default='managed_installs')
    try:
        options, arguments = p.parse_args(args)
    except MyOptParseError, errmsg:
        print >> sys.stderr, str(errmsg)
        return 22 # Invalid argument
    if not options.manifest:
        if len(arguments) == 2:
            options.manifest = arguments[1]
            del arguments[1]
        else:
            p.print_usage(sys.stderr)
            return 7 # Argument list too long
    if len(arguments) != 1:
        p.print_usage(sys.stderr)
        return 7 # Argument list too long
    pkgname = arguments[0]
    
    manifest = getManifest(options.manifest)
    if not manifest:
        return 2 # No such file or directory
    for section in getManifestPkgSections():
        if pkgname in manifest.get(section, []):
            print >> sys.stderr, (
                'Package %s is already in section %s of manifest %s.' 
                 % (pkgname, section, options.manifest))
            return 1 # Operation not permitted
    
    manifest_catalogs = manifest.get('catalogs', [])
    available_pkgnames = getInstallerItemNames(manifest_catalogs)
    if pkgname not in available_pkgnames:
        print >> sys.stderr, (
            'WARNING: Package %s is not available in catalogs %s '
            'of manifest %s.' 
             % (pkgname, manifest_catalogs, options.manifest))
    if not options.section in manifest:
        manifest[options.section] = [pkgname]
    else:
        manifest[options.section].append(pkgname)
    if saveManifest(manifest, options.manifest, overwrite_existing=True):
        print ('Added %s to section %s of manifest %s.' 
               % (pkgname, options.section, options.manifest))
        return 0
    else:
        return 1 # Operation not permitted


def remove_pkg(args):
    '''Removes a package from a manifest.'''
    p = MyOptionParser()
    p.set_usage(
        'remove-pkg PKGNAME --manifest MANIFESTNAME '
        '[--section SECTIONNAME]')
    p.add_option('--manifest')
    p.add_option('--section', default='managed_installs')
    try:
        options, arguments = p.parse_args(args)
    except MyOptParseError, errmsg:
        print >> sys.stderr, str(errmsg)
        return 22 # Invalid argument
    if not options.manifest:
        if len(arguments) == 2:
            options.manifest = arguments[1]
            del arguments[1]
        else:
            p.print_usage(sys.stderr)
            return 7 # Argument list too long
    if len(arguments) != 1:
        p.print_usage(sys.stderr)
        return 7 # Argument list too long
    pkgname = arguments[0]
    
    manifest = getManifest(options.manifest)
    if not manifest:
        return 2 # No such file or directory
    if not options.section in manifest:
        print >> sys.stderr, ('Section %s is not in manifest %s.' 
                               % (options.section, manifest))
        return 1 # Operation not permitted
    if pkgname not in manifest[options.section]:
        print >> sys.stderr, ('Package %s is not in section %s '
                              'of manifest %s.' 
                               % (pkgname, options.section, options.manifest))
        return 1 # Operation not permitted
    else:
        manifest[options.section].remove(pkgname)
        if saveManifest(manifest, options.manifest, overwrite_existing=True):
            print ('Removed %s from section %s of manifest %s.' 
                    % (pkgname, options.section, options.manifest))
            return 0
        else:
            return 1 # Operation not permitted


def add_catalog(args):
    '''Adds a catalog to a manifest.'''
    p = MyOptionParser()
    p.set_usage('add-catalog CATALOGNAME --manifest MANIFESTNAME')
    p.add_option('--manifest')
    try:
        options, arguments = p.parse_args(args)
    except MyOptParseError, errmsg:
        print >> sys.stderr, str(errmsg)
        return 22 # Invalid argument
    if not options.manifest:
        if len(arguments) == 2:
            options.manifest = arguments[1]
            del arguments[1]
        else:
            p.print_usage(sys.stderr)
            return 7 # Argument list too long
    if len(arguments) != 1:
        p.print_usage(sys.stderr)
        return 7 # Argument list too long
    catalogname = arguments[0]
    
    available_catalogs = getCatalogs()
    if catalogname not in available_catalogs:
        print >> sys.stderr, 'Unknown catalog name: %s.' % catalogname
        return 2 # no such file or directory

    manifest = getManifest(options.manifest)
    if not manifest:
        return 2 # no such file or directory
    if not 'catalogs' in manifest:
        manifest['catalogs'] = []
    if catalogname in manifest['catalogs']:
        print >> sys.stderr, (
            'Catalog %s is already in manifest %s.' 
             % (catalogname, options.manifest))
        return 1 # Operation not permitted
    else:
        # put it at the front of the catalog list as that is usually 
        # what is wanted...
        manifest['catalogs'].insert(0, catalogname)
        if saveManifest(manifest, options.manifest, overwrite_existing=True):
            print ('Added %s to catalogs of manifest %s.' 
                    % (catalogname, options.manifest))
            return 0
        else:
            return 1 # Operation not permitted


def remove_catalog(args):
    '''Removes a catalog from a manifest.'''
    p = MyOptionParser()
    p.set_usage('remove-catalog PKGNAME --manifest MANIFESTNAME')
    p.add_option('--manifest')
    try:
        options, arguments = p.parse_args(args)
    except MyOptParseError, errmsg:
        print >> sys.stderr, str(errmsg)
        return 22 # Invalid argument
    if not options.manifest:
        if len(arguments) == 2:
            options.manifest = arguments[1]
            del arguments[1]
        else:
            p.print_usage(sys.stderr)
            return 7 # Argument list too long
    if len(arguments) != 1:
        p.print_usage(sys.stderr)
        return 7 # Argument list too long
    catalogname = arguments[0]

    manifest = getManifest(options.manifest)
    if not manifest:
        return 2 # no such file or directory
    if catalogname not in manifest.get('catalogs', []):
        print >> sys.stderr, (
            'Catalog %s is not in manifest %s.' 
             % (catalogname, options.manifest))
        return 1 # Operation not permitted
    else:
        manifest['catalogs'].remove(catalogname)
        if saveManifest(manifest, options.manifest, overwrite_existing=True):
            print ('Removed %s from catalogs of manifest %s.' 
                    % (catalogname, options.manifest))
            return 0
        else:
            return 1 # Operation not permitted


def add_included_manifest(args):
    '''Adds an included manifest to a manifest.'''
    p = MyOptionParser()
    p.set_usage('add-included-manifest MANIFEST_TO_INCLUDE '
                '--manifest TARGET_MANIFEST')
    p.add_option('--manifest')
    try:
        options, arguments = p.parse_args(args)
    except MyOptParseError, errmsg:
        print >> sys.stderr, str(errmsg)
        return 22 # Invalid argument
    if not options.manifest:
        if len(arguments) == 2:
            options.manifest = arguments[1]
            del arguments[1]
        else:
            p.print_usage(sys.stderr)
            return 7 # Argument list too long
    if len(arguments) != 1:
        p.print_usage(sys.stderr)
        return 7 # Argument list too long
    manifest_to_include = arguments[0]

    available_manifests = getManifestNames()
    if manifest_to_include not in available_manifests:
        print >> sys.stderr, ('Unknown manifest name: %s.'
                                % manifest_to_include)
        return 2 # no such file or directory
    if manifest_to_include == options.manifest:
        print >> sys.stderr, ('Can\'t include %s in itself!.'
                                % manifest_to_include)
        return 1 # Operation not permitted

    manifest = getManifest(options.manifest)
    if not manifest:
        return 2 # no such file or directory
    if not 'included_manifests' in manifest:
        manifest['included_manifests'] = []
    if manifest_to_include in manifest['included_manifests']:
        print >> sys.stderr, (
            'Manifest %s is already included in manifest %s.' 
             % (manifest_to_include, options.manifest))
        return 1 # Operation not permitted
    else:
        manifest['included_manifests'].append(manifest_to_include)
        if saveManifest(manifest, options.manifest, overwrite_existing=True):
            print ('Added %s to included_manifests of manifest %s.' 
                    % (manifest_to_include, options.manifest))
            return 0
        else:
            return 1 # Operation not permitted


def remove_included_manifest(args):
    '''Removes an included manifest from a manifest.'''
    p = MyOptionParser()
    p.set_usage(
        'remove-included_manifest INCLUDED_MANIFEST --manifest MANIFESTNAME')
    p.add_option('--manifest')
    try:
        options, arguments = p.parse_args(args)
    except MyOptParseError, errmsg:
        print >> sys.stderr, str(errmsg)
        return 22 # Invalid argument
    if not options.manifest:
        if len(arguments) == 2:
            options.manifest = arguments[1]
            del arguments[1]
        else:
            p.print_usage(sys.stderr)
            return 7 # Argument list too long
    if len(arguments) != 1:
        p.print_usage(sys.stderr)
        return 7 # Argument list too long
    included_manifest = arguments[0]

    manifest = getManifest(options.manifest)
    if not manifest:
        return 2 # no such file or directory
    if included_manifest not in manifest.get('included_manifests', []):
        print >> sys.stderr, (
            'Manifest %s is not included in manifest %s.' 
             % (included_manifest, options.manifest))
        return 1 # Operation not permitted
    else:
        manifest['included_manifests'].remove(included_manifest)
        if saveManifest(manifest, options.manifest, overwrite_existing=True):
            print ('Removed %s from included_manifests of manifest %s.' 
                    % (included_manifest, options.manifest))
            return 0
        else:
            return 1 # Operation not permitted
                    
                    
def help(args):
    '''Prints available subcommands'''
    print "Available sub-commands:"
    subcommands = CMD_ARG_DICT['cmds'].keys()
    subcommands.sort()
    for item in subcommands:
        print '\t%s' % item
    return 0


def configure(args):
    """Configures manifestutil for use"""
    if len(args):
        print >> sys.stderr, 'Usage: configure'
        return 22 # Invalid argument
    for (key, prompt) in [
        ('repo_path', 'Path to munki repo (example: /Volumes/repo)'),
        ('repo_url', 
         'Repo fileshare URL (example: afp://munki.pretendco.com/repo)')]:
        
        newvalue = raw_input('%15s [%s]: ' % (prompt, pref(key)))
        _prefs[key] = newvalue or pref(key) or ''
    
    try:
        plistlib.writePlist(_prefs, PREFSPATH)
        return 0
    except Exception:
        print >> sys.stderr, 'Could not save configuration to %s' % PREFSPATH
        return 1 # Operation not permitted


def tab_completer(text, state):
    '''Called by the readline lib to calculate possible completions'''
    array_to_match = None
    if readline.get_begidx() == 0:
        # since we are at the start of the line
        # we are matching commands
        array_to_match = 'cmds'
        match_list = CMD_ARG_DICT.get('cmds', {}).keys()
    else:
        # we are matching args
        cmd_line = readline.get_line_buffer()[0:readline.get_begidx()]
        cmd = shlex.split(cmd_line)[-1]
        array_to_match = CMD_ARG_DICT.get('cmds', {}).get(cmd)
        if array_to_match:
            match_list = CMD_ARG_DICT[array_to_match]
        else:
            array_to_match = CMD_ARG_DICT.get('options', {}).get(cmd)
            if array_to_match:
                match_list = CMD_ARG_DICT[array_to_match]
            else:
                array_to_match = 'options'
                match_list = CMD_ARG_DICT.get('options',{}).keys()
                
    matches = [item for item in match_list
                   if item.upper().startswith(text.upper())]
    try:
        return matches[state]
    except IndexError:
        return None


def setUpTabCompleter():
    '''Starts our tab-completer when running interactively'''
    readline.set_completer(tab_completer)
    if sys.platform == 'darwin':
        readline.parse_and_bind ("bind ^I rl_complete")
    else:
        readline.parse_and_bind("tab: complete")
        
        
def handleSubcommand(args):
    '''Does all our subcommands'''
    # strip leading hyphens and
    # replace embedded hyphens with underscores
    # so '--add-pkg' becomes 'add_pkg'
    # and 'new-manifest' becomes 'new_manifest'
    subcommand = args[0].lstrip('-').replace('-', '_')
    
    # special case the exit command
    if subcommand == 'exit':
       cleanupAndExit(0)
       
    if subcommand not in ['version', 'configure', 'help']:
        if not repoAvailable():
            exit(-1)
    
    try:
        # find function to call by looking in the global name table
        # for a function with a name matching the subcommand
        subcommand_function = globals()[subcommand]
        return subcommand_function(args[1:])
    except (TypeError, KeyError):
        print >> sys.stderr, 'Unknown subcommand: %s' % subcommand
        help(args)
        return 2


PREFSNAME = 'com.googlecode.munki.munkiimport.plist'
PREFSPATH = os.path.expanduser(os.path.join('~/Library/Preferences',    
                                            PREFSNAME))
WE_MOUNTED_THE_REPO = False
INTERACTIVE_MODE = False
CMD_ARG_DICT = {}

def main():
    global INTERACTIVE_MODE
    global CMD_ARG_DICT
    
    cmds = {'add-pkg':                  'pkgs',
            'add-catalog':              'catalogs',
            'add-included-manifest':    'manifests',
            'remove-pkg':               'pkgs',
            'remove-catalog':           'catalogs',
            'remove-included-manifest': 'manifests',
            'list-manifests':           'manifests',
            'list-catalogs':            'default',
            'list-catalog-items':       'catalogs',
            'display-manifest':         'manifests',
            'find':                     'default',
            'new-manifest':             'default',
            'copy-manifest':            'manifests',
            'exit':                     'default',
            'help':                     'default',
            'configure':                'default',
            'version':                  'default'
            }
    CMD_ARG_DICT['cmds'] = cmds
                     
    if len(sys.argv) > 1:
        # some commands or options were passed at the command line
        cmd = sys.argv[1].lstrip('-')
        retcode = handleSubcommand(sys.argv[1:])
        cleanupAndExit(retcode)
    else:
        # if we get here, no options or commands, 
        # so let's enter interactive mode
        INTERACTIVE_MODE = True
        # must have an available repo for interfactive mode
        if not repoAvailable():
            exit(-1)
        # build the rest of our dict to enable tab completion
        CMD_ARG_DICT['options'] = {'--manifest': 'manifests',
                                   '--section':  'sections'}

        CMD_ARG_DICT['default'] = []
        CMD_ARG_DICT['sections'] = getManifestPkgSections()
        CMD_ARG_DICT['manifests'] = getManifestNames()
        CMD_ARG_DICT['catalogs'] = getCatalogs()
        CMD_ARG_DICT['pkgs'] = getInstallerItemNames(getCatalogs())

        setUpTabCompleter()
        print 'Entering interactive mode... (type "help" for commands)'
        while 1:
            try:
                cmd = raw_input('> ')
            except KeyboardInterrupt:
                print # so we finish off the raw_input line
                cleanupAndExit(0)
            args = shlex.split(cmd)
            handleSubcommand(args)
    
if __name__ == '__main__':
    main()