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

# PyKota Invoice generator
#
# 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 sys
import os
import pwd
import grp
from pykota.tool import PyKotaTool, PyKotaToolError, PyKotaCommandLineError, crashed, N_
from pykota.config import PyKotaConfigError
from pykota.storage import PyKotaStorageError

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

An invoice generator for PyKota.

command line usage :

  pkinvoice [options] user1 user2 ... userN

options :

  -v | --version       Prints edpykota's version number then exits.
  -h | --help          Prints this message then exits.
  
  -g | --groups        Generate invoices for users groups instead of users.
  
  -r | --reference v   Uses v as the initial reference value : an invoice
                       will be generated for any account balance's value
                       lower or equal to the reference value. The
                       default reference value is of course 0.0 credits.
                       
  -o | --output f.pdf  Defines the name of the invoice file which will
                       be generated as a PDF document. If not set or
                       set to '-', the PDF document is sent to standard
                       output. 
                       
  -u | --unit u        Defines the name of the unit to use on the invoice.                       
                       The default unit is 'Credits', optionally translated
                       to your native language if it is supported by PyKota.
  
  -V | --vat p         Sets the percent value of the applicable VAT.
                       The default is 0.0, meaning no VAT information
                       will be included.
                       
  user1 through userN and group1 through groupN can use wildcards if 
  needed. If no user argument is used, a wildcard of '*' is assumed, 
  meaning include all users or groups.
  
examples :                       

  $ pkinvoice --reference 15.0 --unit EURO --output invoices.pdf
  
  Will generate a PDF document containing invoices for all users whose
  account balance is below 15.0 credits. For each user the amount due
  will be (15.0 - AccountBalance) EURO. No VAT information will be 
  included.
""") 
        
class PKInvoice(PyKotaTool) :        
    """A class for pkinvoice."""
    def main(self, names, options) :
        """Generate invoices."""
        if not self.config.isAdmin :
            raise PyKotaCommandLineError, "%s : %s" % (pwd.getpwuid(os.geteuid())[0], _("You're not allowed to use this command."))
        
        self.display("%s...\n" % _("Processing"))
        if not names :
            names = [ "*" ]
            
        suffix = (options["groups"] and "Group") or "User"        
        entries = getattr(self.storage, "getMatching%ss" % suffix)(",".join(names))
        nbtotal = len(entries)
        self.printInfo("Not implemented yet !", "warn")
        for i in range(nbtotal) :
            # TODO 
            percent = 100.0 * float(i) / float(nbtotal)
            self.display("\r%.02f%%" % percent)
        self.display("\r100.00%%\r        ")
        self.display("\r%s\n" % _("Done."))
                     
if __name__ == "__main__" : 
    retcode = 0
    try :
        defaults = { "reference" : "0.0",
                     "vat" : "0.0",
                     "unit" : _("Credits"),
                     "output" : "-",
                   }
        short_options = "vho:gr:u:V:"
        long_options = ["help", "version", \
                        "groups", "reference=", "unit=", "output=", \
                        "vat=", ]
        
        # Initializes the command line tool
        invoiceGenerator = PKInvoice(doc=__doc__)
        invoiceGenerator.deferredInit()
        
        # parse and checks the command line
        (options, args) = invoiceGenerator.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["groups"] = options["g"] or options["groups"]
        options["reference"] = options["r"] or options["reference"] or defaults["reference"]
        options["vat"] = options["V"] or options["vat"] or defaults["vat"]
        options["unit"] = options["u"] or options["unit"] or defaults["unit"]
        options["output"] = options["o"] or options["output"] or defaults["output"]
        
        if options["help"] :
            invoiceGenerator.display_usage_and_quit()
        elif options["version"] :
            invoiceGenerator.display_version_and_quit()
        else :
            retcode = invoiceGenerator.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 :
            invoiceGenerator.crashed("pkinvoice failed")
        except :    
            crashed("pkinvoice failed")
        retcode = -1

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