# -*- coding: utf-8 -*-

# Copyright (c) 2004 - 2013 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the single application server and client.
"""

import os

from PyQt4.QtCore import SIGNAL

from Utilities.SingleApplication import SingleApplicationClient, SingleApplicationServer

###########################################################################
# define some module global stuff
###########################################################################

SAFile = "eric4_trpreviewer.lck"

# define the protocol tokens
SALoadForm =        '>LoadForm<'
SALoadTranslation = '>LoadTranslation<'

class TRSingleApplicationServer(SingleApplicationServer):
    """
    Class implementing the single application server embedded within the 
    Translations Previewer.
    
    @signal loadForm(fname) emitted to load a form file
    @signal loadTranslation(fname, first) emitted to load a translation file
    """
    def __init__(self, parent):
        """
        Constructor
        
        @param parent parent widget (QWidget)
        """
        SingleApplicationServer.__init__(self, SAFile)
        
        self.parent = parent

    def handleCommand(self, cmd, params):
        """
        Public slot to handle the command sent by the client.
        
        @param cmd commandstring (string)
        @param params parameterstring (string)
        """
        if cmd == SALoadForm:
            self.__saLoadForm(eval(params))
            return

        if cmd == SALoadTranslation:
            self.__saLoadTranslation(eval(params))
            return

    def __saLoadForm(self, fnames):
        """
        Private method used to handle the "Load Form" command.
        
        @param fnames filenames of the forms to be loaded (list of strings)
        """
        for fname in fnames:
            self.emit(SIGNAL('loadForm'), fname)
        
    def __saLoadTranslation(self, fnames):
        """
        Private method used to handle the "Load Translation" command.
        
        @param fnames filenames of the translations to be loaded (list of strings)
        """
        first = True
        for fname in fnames:
            self.emit(SIGNAL('loadTranslation'), fname, first)
            first = False

class TRSingleApplicationClient(SingleApplicationClient):
    """
    Class implementing the single application client of the Translations Previewer.
    """
    def __init__(self):
        """
        Constructor
        """
        SingleApplicationClient.__init__(self, SAFile)
        
    def processArgs(self, args):
        """
        Public method to process the command line args passed to the UI.
        
        @param args list of files to open
        """
        # no args, return
        if args is None:
            return
        
        uiFiles = []
        qmFiles = []
        
        for arg in args:
            ext = os.path.splitext(arg)[1]
            ext = ext.lower()
            
            if ext == '.ui':
                uiFiles.append(arg)
            elif ext == '.qm':
                qmFiles.append(arg)
        
        cmd = "%s%s\n" % (SALoadForm, unicode(uiFiles))
        self.sendCommand(cmd)
        cmd = "%s%s\n" % (SALoadTranslation, unicode(qmFiles))
        self.sendCommand(cmd)
        
        self.disconnect()
