/***************************************************************************
*                                  main.cpp
*                             -------------------
*
*    Revision     : $Id$
*    begin        : Tue Jan 29 2002
*    copyright    : (C) 2002 by Patrick Charbonnier
*                 : Based On Caitoo v.0.7.3 (c) 1998 - 2000, Matej Koss
*    email        : pch@freeshell.org
*
****************************************************************************/

/***************************************************************************
 *
 *   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.
 *
 ***************************************************************************/


#include <kwin.h>
#include <klocale.h>
#include <kaboutdata.h>
#include <kcmdlineargs.h>
#include <kurl.h>
#include <kuniqueapplication.h>
#include <kstartupinfo.h>

#include <signal.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include "kmainwidget.h"
#include "version.h"



static const char description[] = I18N_NOOP("An advanced download manager for KDE");

static const char version[] = KGETVERSION;


static KCmdLineOptions option[] = {
                                      { "showDropTarget", I18N_NOOP("Start KGet with drop target"), 0 },
                                      {"+[URL(s)]", I18N_NOOP("URL(s) to download"), 0},
                                      KCmdLineLastOption
                                  };

static void cleanup(void);
static void setSignalHandler(void (*handler) (int));

//static msg_handler oldMsgHandler = 0L;

//-----------------------------------------------------------------------------
// Crash recovery signal handler
static void signalHandler(int sigId)
{
    fprintf(stderr, "*** KGet got signal %d\n", sigId);

    if (sigId != SIGSEGV && kmain) {
        fprintf(stderr, "*** KGet saving data\n");
        delete kmain;
    }
    // If Kget crashes again below this line we consider the data lost :-|
    // Otherwise Kget will end in an infinite loop.
    setSignalHandler(SIG_DFL);
    cleanup();
    exit(1);
}


//-----------------------------------------------------------------------------
static void setSignalHandler(void (*handler) (int))
{
    signal(SIGSEGV, handler);
    signal(SIGKILL, handler);
    signal(SIGTERM, handler);
    signal(SIGHUP, handler);
    signal(SIGFPE, handler);
    signal(SIGABRT, handler);

    // catch also the keyboard interrupt
    signal(SIGINT, handler);
}


static void cleanup(void)
{
    qInstallMsgHandler(0L /*oldMsgHandler*/);
//     QString cmd;
}


class KGetApp : public KUniqueApplication
{
private:
    KMainWidget *kmainwidget;
    
public:
    KGetApp() : KUniqueApplication()
    {
#ifdef _DEBUG
        sDebugIn << endl;
#endif

        kmainwidget=0;

#ifdef _DEBUG
        sDebugOut << endl;
#endif
    }

    ~KGetApp()
    {
#ifdef _DEBUG
        sDebugIn << endl;
#endif
    delete kmainwidget;
#ifdef _DEBUG
        sDebugOut << endl;
#endif
    }


    int newInstance()
    {
#ifdef _DEBUG
        sDebugIn <<"kmainwidget="<<kmainwidget << endl;
#endif

        KCmdLineArgs *args = KCmdLineArgs::parsedArgs();


        if (kmainwidget==0)
        {
            if(args->count()>0)
                kmainwidget=new KMainWidget(true);
            else
                kmainwidget=new KMainWidget();
            setMainWidget(kmain);
        }

        else
            KStartupInfo::setNewStartupId( mainWidget(), kapp->startupId());

        if (args->isSet("showDropTarget"))
            kmain->activateDropTarget();

        if (args->count()==1)
        {
#ifdef _DEBUG
            sDebug <<"args(0)= "<<args->arg(0) << endl;
#endif
            QString txt(args->arg(0));
            if ( txt.endsWith( ".kgt" ) )
                kmain->readTransfersEx(KURL::fromPathOrURL( txt ));
            else
                kmain->addTransferEx( KURL::fromPathOrURL( txt ),
                                      KURL());
        }
        else if(args->count()>=2)
		{
			KURL::List urls;
			for( int i=0; i < args->count(); ++i){
				urls.append(KURL::fromPathOrURL( args->arg(i)));
			}
			
			// Sometimes valid filenames are not recognised by KURL::isLocalFile(), they are marked as invalid then
			if ( args->count()==2 && ( urls.last().isLocalFile() || !urls.last().isValid()))
			{
				kmain->addTransferEx( urls.first(), urls.last() );
			}
			else
			{
				kmain->addTransfers( urls, QString() );
			}
		}
        args->clear();

#ifdef _DEBUG
        sDebugOut << endl;
#endif

        return 0;
    }
};


/////////////////////////////////////////////////////////////////

int main(int argc, char *argv[])
{
    KAboutData aboutData("kget", I18N_NOOP("KGet"), version, description, KAboutData::License_GPL, "(C) 2001 - 2002, Patrick Charbonnier \n(C) 2002, Carsten Pfeiffer\n(C) 1998 - 2000, Matej Koss", "kget@kde.org", 0);

    aboutData.addAuthor("Patrick  Charbonnier", 0, "pch@freeshell.org");
    aboutData.addAuthor("Carsten Pfeiffer", 0, "pfeiffer@kde.org");
    aboutData.addAuthor("Matej Koss", 0);


    KCmdLineArgs::init(argc, argv, &aboutData);
    KCmdLineArgs::addCmdLineOptions(option);

    KGetApp::addCmdLineOptions();

    if (!KGetApp::start()) {
        fprintf(stderr, "kget is already running!\n");
        return 0;
    }

    KGetApp kApp;

// disabling he custom signal handler, so at least we have the backtraces for
// crashes...
//    setSignalHandler(signalHandler);
    kApp.exec();

    cleanup();
}