#! /usr/bin/env python
# -*- coding: ISO-8859-15 -*-

# PyKota Coefficients manager
#
# PyKota - Print Quotas for CUPS and LPRng
#
# (c) 2003, 2004, 2005, 2006 Jerome Alet <alet@librelogiciel.com>
# 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.
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# $Id$
#
#

import os
import sys
import pwd

from pykota.tool import PyKotaTool, PyKotaToolError, PyKotaCommandLineError, crashed, N_

__doc__ = N_("""pykoef v%(__version__)s (c) %(__years__)s %(__author__)s

A coefficients Manager for PyKota.

command line usage :

  pykoef [options] cofficient1 coefficient2 ... coefficientN

options :

  -v | --version       Prints pykoef version number then exits.
  -h | --help          Prints this message then exits.
  
  -a | --add           Adds coefficients if they don't exist in PyKota's
                       database. If they exist, they are modified
                       unless -s|--skipexisting is also used.

  -d | --delete        Deletes coefficients from PyKota's database.

  -l | --list          List informations about the coefficients.
  
  -P | --printer P     Only apply the command to printer P's coefficients.
                       P can be a comma separated list of printers' names
                       or wildcards.

  -s | --skipexisting  In combination with the --add option above, tells
                       pykoef to not modify existing coefficients.
                       
  -V | --value v       Sets the coefficients' value to v. This value can                     
                       be any real number, positive or negative.

  coefficient1 through coefficientN can contain wildcards if the --add option
  is not set.

examples :                              

  # TODO
""")
        
class PyKOef(PyKotaTool) :        
    """A class for a coefficients manager."""
    def main(self, names, options) :
        """Manage printers coefficients."""
        if (not self.config.isAdmin) and (not options["list"]) :
            raise PyKotaCommandLineError, "%s : %s" % (pwd.getpwuid(os.geteuid())[0], _("You're not allowed to use this command."))
            
        if options["list"] and not names :
            names = ["*"]
            
        try :     
            value = float(options["value"])
        except :    
            raise PyKotaCommandLineError, _("Coefficients' values must be numeric. See help.")
            
        #
        # TODO    
        #
        raise RuntimeError, "Not implemented yet ! Please come back later..."
                     
if __name__ == "__main__" : 
    retcode = 0
    try :
        defaults = { \
                     "printer" : "*", \
                     "value" : "1.0", \
                   }
        short_options = "hvadlsP:V:"
        long_options = ["help", "version", "add", "delete", "list", "printer=", "skipexisting", "value="]
        
        # Initializes the command line tool
        manager = PyKoef(doc=__doc__)
        manager.deferredInit()
        
        # parse and checks the command line
        (options, args) = manager.parseCommandline(sys.argv[1:], short_options, long_options)
        
        # sets long options
        options["help"] = options["h"] or options["help"]
        options["version"] = options["v"] or options["version"]
        options["add"] = options["a"] or options["add"]
        options["delete"] = options["d"] or options["delete"] 
        options["list"] = options["l"] or options["list"]
        options["printer"] = options["P"] or options["printer"] or defaults["printer"]
        options["value"] = options["V"] or options["value"] or defaults["value"]
        options["skipexisting"] = options["s"] or options["skipexisting"]
        
        if options["help"] :
            manager.display_usage_and_quit()
        elif options["version"] :
            manager.display_version_and_quit()
        elif (options["delete"] and options["add"]) \
           or (options["skipexisting"] and not options["add"]) \
           or (options["list"] and (options["add"] or options["delete"])) :
            raise PyKotaCommandLineError, _("incompatible options, see help.")
        elif (not args) and (options["add"] or options["delete"]) :    
            raise PyKotaCommandLineError, _("You have to pass coefficients on the command line")
        else :
            retcode = manager.main(args, options)
    except KeyboardInterrupt :        
        sys.stderr.write("\nInterrupted with Ctrl+C !\n")
        retcode = -3
    except PyKotaCommandLineError, msg :    
        sys.stderr.write("%s : %s\n" % (sys.argv[0], msg))
        retcode = -2
    except SystemExit :        
        pass
    except :
        try :
            manager.crashed("pykoef failed")
        except :    
            crashed("pykoef failed")
        retcode = -1

    try :
        manager.storage.close()
    except (TypeError, NameError, AttributeError) :    
        pass
        
    sys.exit(retcode)