#!/usr/bin/python
"""capisuite-checkconfig - capisuite tool for checking config files

Usage:
capisuite-checkconfig
          Check some parameters and print content of config.

capisuite-checkconfig file1 [file2...]
          Print contents of the given config files.
          
capisuite-checkconfig -t
          Test if capisuite is configured (returns non zero if not).
          
capisuite-checkconfig [ -h | --help ]
          Print this usage information.
"""

__author__    = "Hartmut Goebel <h.goebel@crazy-compilers.com>"
__copyright__ = "Copyright (c) 2004-2005 by Hartmut Goebel"
__version__   = "$Revision: 0.0 $"
__credits__   = "This is part of www.capisuite.de; thanks to Gernot Hillier"
__license__ = """
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 2 of the License, or
(at your option) any later version.
"""

import sys, os, getopt

def error(*msgs):
    for m in msgs:
        print >>sys.stderr, m,
    print >>sys.stderr
    sys.exit(10)

try:
    import capisuite.config
    import capisuite.fileutils
    from capisuite.consts import *
except Exception, e:
    error("failed to import capisuite's python modules", str(e))

# Some helper functions, if you don't know what they do, just skip to
# the easy part
    
def test_nextfile(user, path, queue, prefix):
    path = os.path.join(path, user, queue)
    if not os.path.exists(path):
        print "Directory", path, "does not exist"
        print "    ==> this is ok, if this queue has never been",
        print "used before (e.g. never send a fax)"
        print
        return
    file = os.path.join(path, prefix+"-nextnr")
    if not os.path.exists(file):
        print "File", file, "does not exist"
        print "    ==> this is ok, if this queue has never been",
        print "used before (e.g. never send a fax)"
        print
        return

    print "Trying to read file:", file
    num = None
    try:
        num = capisuite.fileutils.readCounter(0, file)
    except IOError, err:
        print >>sys.stderr, "****Failed to read/parse the *nextnr file:", err
    except ValueError:
        print >>sys.stderr, "****Failed to convert file content to int number"
    else:
        if num is None:
            print '   is unset'
        else:
            print '   contains number', num


def checkQdirs(user, basedir, queuedir):
    path = os.path.join(basedir, user, queuedir)
    if not os.path.exists(path):
        if os.getuid() == 0:
            print 'creating user queue dir', path
            capisuite.fileutils._mkuserdir(user, basedir, user, queuedir)
            return 1
        else:
            print >>sys.stderr, 'missing user queue dir', path
            return 0
    return 1

# END helper functions ================ 

def checkGlobalConfig(file=None):
    print "Reading global configuration ...",
    try:
        config = capisuite.config.readGlobalConfig(file)
    except IOError, err:
        print
        error("Failed to read/parse config file:", err)
    print 'okay'

    print
    print "========= current configuration ==================="
    for section in config.sections():
        print "----------------", '['+section+']', "-------------"
        options = config.options(section)
        options.sort()
        for option in options:
            print option, '=', config.get(section, option)
        print


    print
    print "=========== Testing User Queues and Sequence Files ====="
    print

    basedir = config.get('GLOBAL', 'fax_user_dir')
    userdirs_missing = 0
    for user in config.listUsers():
        print "----------------", user, "-------------"
        for queue in (SEND_Q, RECEIVED_Q):
            if not checkQdirs(user, basedir, queue):
                userdirs_missing += 1
            else:
                test_nextfile(user, basedir, queue, "fax")
                if queue == RECEIVED_Q:
                    test_nextfile(user, basedir, queue, "voice")

    if userdirs_missing:
        print
        print 'Some user queue dirs are missing.'
        print "Rerun as 'root' to create them."
        print

def do_test_if_configured():
    """
    Test whether capisuite is configured. This includes:
    - config files must exist
    - Some sections must exist
    - at least one user must be configured in fax and voice config
    - ... further tests to come
    """

    def test_configfile(filename, required_sections):
        cfg = capisuite.config.CSConfigParser()
        try:
            config = cfg.read(filename)
        except IOError, err:
            print >> sys.stderr, "ERROR: Can't read", filename
            return 0
        all_sections = cfg.sections()
        for sect in required_sections:
            if not sect in all_sections:
                print >> sys.stderr, "Missing section", sect, "in", filename
                return 0
        for sect in all_sections:
            if not sect in required_sections:
                return 1
        print >> sys.stderr, "Warning: Missing a user section in", filename
        return 0
    
    # Read global configuration
    #try:
    #    config = capisuite.config.readConfig(configfile)
    #except IOError, err:
    #    return 10

    configured_fax = \
           test_configfile(os.path.join("@pkgsysconfdir@", "fax.conf"),
                           ('GLOBAL',
                            'MailFaxReceived', 'MailFaxSent', 'MailFaxFailed'))
    configured_voice = \
           test_configfile(os.path.join("@pkgsysconfdir@", "answering_machine.conf"),
                           ('GLOBAL', 'MailVoiceReceived'))
    return configured_fax or configured_voice

#----------- usage -----------#

def usage(error=''):
    print __doc__
    if error:
        print
        print "ERROR:", error
    sys.exit(1)

#----------- main -----------#

test_if_configured = 0

try:
    opts, args = getopt.getopt(sys.argv[1:], "c:t", ['config=','test'])
except getopt.GetoptError, e:
    usage(e.msg)
    sys.exit(1)

for option, param in opts:
    # commands
    if option in ('-h','--help'): usage()
    elif option in ('-t','--test'): test_if_configured = 1

if test_if_configured:
    if not do_test_if_configured():
        print 'capisuite seams to be not configured!'
        sys.exit(10)
    else:
        print 'capisuite seams to be configured!'
        sys.exit(0)
elif len(args) == 0:
    checkGlobalConfig()
else:
    config = capisuite.config.readGlobalConfig(sys.argv[1])
    sections = config.sections()
    sections.sort()
    for section in sections:
        print "----------------", '['+section+']', "-------------"
        options = config.options(section)
        options.sort()
        for option in options:
            print option, '=', config.get(section, option)
        print
    print 'known users:',
    print ', '.join(map(repr, config.listUsers()))

# todo: these checks:
# - are all users valid system users?
# - do all voice-users have 'voice_delay' set?