# -*- coding: iso-8859-1 -*-
#  Copyright (C) 2010 EDF R&D
#
#  This library is free software; you can redistribute it and/or
#  modify it under the terms of the GNU Lesser General Public
#  License as published by the Free Software Foundation; either
#  version 2.1 of the License.
#
#  This library 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
#  Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public
#  License along with this library; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
#
#  See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
#

__author__="aribes/gboulant"

# HACK - Pour l'instant
import logging
logging.basicConfig(level=logging.DEBUG, format='%(levelname)-8s %(message)s')
logger = logging.getLogger()

class DevelException(Exception):
    def __init__(self, message):
        """Canonical constructor"""
        Exception.__init__(self,message)

#
# ==============================================================================
# Interface of an eficas observer (for implementing the subject/observer pattern)
# ==============================================================================
#
from daGuiImpl.enumerate import Enumerate
class EficasObserver:
    """
    This class specifies the interface of an eficas observer. See example at the
    bottom of this file.
    """
    def processEficasEvent(self, eficasWrapper, eficasEvent):
        """
        This function should be implemented in the concrete Observer.
        @param eficasWrapper the instance of the source EficasWrapper
        @param eficasEvent the emitted event (instance of EficasEvent)
        """
        raise DevelException("processEficasEvent not implemented yet")

class EficasEvent:
    EVENT_TYPES=Enumerate([
        'CLOSE',
        'SAVE'
    ])

    def __init__(self,eventType,callbackId=None):
        """
        Creates an eficas event to be used by an EficasWrapper to notify an
        EficasObserver.

        The eventType depends of the context of creation. It specify the nature
        of the event inside EficasWrapper that triggers the creation of this instance.
        
        The callbackId is an object used by the EficasObserver to map the
        notification (this received event) with the initial event (callback)
        This object can be anything and has to be defined through a convention
        that both the EficasWrapper and the EficasObserver can understand.
        Typically, the eficas observer set the callback id to the eficas wrapper
        before running the asynchronous show. Then, when an event is raised by
        the eficas wrapper toward its observer, it embeds the callback id so that
        the observer can match the received event to the initial trigger context.
        
        @param the eventType to be choosen in the EVENT_TYPES
        @param callbackId an arbitrary data object
        """
        if not self.EVENT_TYPES.isValid(eventType):
            raise DevelException("The event type "+str(eventType)+" is not defined")

        self.eventType = eventType
        self.callbackId = callbackId

#
# ==============================================================================
# Definition of an Eficas wrapper for integration to the SALOME framework
# This wrapper is not specific to the OMA context and is intended not to be.
# ==============================================================================
#
eficasPath = '@EFICAS_DIR@'
import os
if os.environ.has_key( "EFICAS_ROOT"):
    eficasPath = os.environ["EFICAS_ROOT"]
import sys
sys.path[:0]=[eficasPath,
              os.path.join( eficasPath,'Editeur'),
              os.path.join( eficasPath,'UiQT4'),
             ]

import Editeur
from InterfaceQT4 import qtEficas

class EficasWrapper(qtEficas.Appli):

    def __init__(self, parent, code , fichier=None, module="Eficas", version=None, salome=0):

        self.__codetype = code
        self.__jdc = None

        # variables for the notification procedure
        self.__observer  = None
        self.__callbackId = None

        # The convention is that the python pref associated to the code are in
        # a folder whose name is the code name with lower letters but the
        # first that is in capital letter.
        pathCode=code[0]+code[1:].lower()
        sys.path[:0]=[os.path.join(eficasPath,pathCode)]

        if Editeur.__dict__.has_key( 'session' ):
            from Editeur import session
            eficasArg = []
            eficasArg += sys.argv
            if fichier:
                eficasArg += [ fichier ]
            if version:
                eficasArg += [ "-c", version ]
            else :
                print "noversion"
            session.parse( eficasArg )

        qtEficas.Appli.__init__( self,code=code,salome=salome,parent=parent)

    def setCodeType(self,code):
        self.__codetype = code

    def setJdc(self, value, name=None):
        self.__jdc = value
        if self.__jdc is None:
            editor = self.viewmanager.getEditor()
            editor.fichier = os.path.abspath(unicode("/tmp/eficasfile.comm"))
        else:
            fichier = os.path.abspath(unicode("/tmp/eficasfile.comm"))
            f = open(fichier,'w')
            f.write(self.__jdc)
            f.close()
            editor=self.viewmanager.getEditor( fichier,units=None)

        # _TODO_ set the name and indicate that it's not used to ask a filename
        #index=self.viewmanager.myQtab.currentIndex()
        #self.viewmanager.myQtab.setTabText(index,fileName)

    def getJdc(self):
        # First update the jdc attribute and return the value
        self.__jdc = self.__getJdcText()
        return self.__jdc

    # ==========================================================================
    # Function for the notification interface between an EficasWrapper an an
    # EficasObserver.
    #
    def addObserver(self, observer):
        """
        In fact, only one observer may be defined for the moment.
        """
        try:
            observer.processEficasEvent
        except:
            raise DevelException("the argument should implement the function processEficasEvent")
        self.__observer = observer

    def notifyObserver(self, eventType):
        eficasEvent = EficasEvent(eventType, self.getCallbackId())
        self.__observer.processEficasEvent(self, eficasEvent)

    def setCallbackId(self, callbackId):
        """
        This function should be used to define the callback identifier that
        will be used by the observer to map the notifcation event with the source
        event.
        @param callbackId Any object to be used in the notification interface
        """
        self.__callbackId = callbackId

    def getCallbackId(self):
        return self.__callbackId

    # ==========================================================================
    # Functions to handle the Eficas callback functions
    #
    def closeEvent(self,event):
        """
        This method is a notification function called at the end of the eficas
        processes quit/exit.
        This close event has to be overload to handle the management of data
        saving process, and to prevent the application from bug when reopen
        eficas after a first close operation inside SALOME.
        @overload
        """
        logger.debug("#### Handle closeEvent")

        # Get the data and notify the observers of the event
        # _TODO_ get data
        self.notifyObserver(EficasEvent.EVENT_TYPES.CLOSE)
        self.fileCloseAll()

        # This is to prevent from bug when reopen eficas after a first close
        # operation inside SALOME.
        import InterfaceQT4.readercata
        if hasattr(InterfaceQT4.readercata,'reader') :
           del InterfaceQT4.readercata.reader
        event.accept()


    def fileSave(self):
        """
        @overload
        """
        logger.debug("This is my fileSave")
        # Notify the observers of the event
        self.notifyObserver(EficasEvent.EVENT_TYPES.SAVE)

        qtEficas.Appli.fileSave(self)


    def fileSaveAs(self):
        """
        @overload
        """
        logger.debug("This is my fileSaveAs")
        self.fileSave()

    def fileClose(self):
        """
        @overload
        """
        logger.debug("This is my fileClose")
        qtEficas.Appli.fileClose(self)

    def fileCloseAll(self):
        """
        @overload
        """
        logger.debug("This is my fileCloseAll")
        qtEficas.Appli.fileCloseAll(self)

    # ==========================================================================
    # helper functions
    #
    def __getJdcText(self):
        """
        This function returns the current jdc in text format.
        """
        index=self.viewmanager.myQtab.currentIndex()
        if index < 0 : return

        editor=self.viewmanager.dict_editors[index]
        format = self.format_fichier
        strSource = str( editor.get_text_JDC(format) )
        return strSource

    def displayNew(self):
        self.fileNew()
        self.show()

    # ==========================================================================
    # Test functions ...
    #
    def __displayData(self, textjdc):
        index=self.viewmanager.myQtab.currentIndex()
        if index < 0 : return

        editor=self.viewmanager.dict_editors[index]

        jdc=editor.readercata.cata[0].JdC(procedure=textjdc,appli=editor,cata=editor.readercata.cata,cata_ord_dico=editor.readercata.cata_ordonne_dico,nom="JDC name",rep_mat=editor.CONFIGURATION.rep_mat)
        self.viewmanager.getEditor("toto.com",jdc)