#include <dirent.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

#include <qdir.h>
#include <qstring.h>

#include <kdebug.h>
#include <kmessagebox.h>
#include <klocale.h>
#include <kapp.h>
#include <kstddirs.h>

#include <kmailIface.h>

#include "kmkernel.h"
#include "kmmainwin.h"
#include "kmcomposewin.h"
#include "kmmessage.h"
#include "kmfoldermgr.h"
#include "kmfolder.h"
#include "kmfiltermgr.h"
#include "kmreaderwin.h"
#include "kmsender.h"
#include "kmundostack.h"
#include "kmidentity.h"
#include "kmacctmgr.h"
#include "kbusyptr.h"
#include "kmaddrbook.h"

#include <X11/Xlib.h>

KMKernel *KMKernel::mySelf = 0;

/********************************************************************/
/*                     Constructor and destructor                   */
/********************************************************************/
KMKernel::KMKernel (QObject *parent, const char *name) :
  QObject(parent, name),  DCOPObject("KMailIface")
{
  //debug ("KMKernel::KMKernel");
  mySelf = this;
}

KMKernel::~KMKernel ()
{
  mySelf = 0;
  debug ("KMKernel::~KMKernel");
}


/********************************************************************/
/*             DCOP-callable, and command line actions              */
/********************************************************************/
void KMKernel::checkMail () //might create a new reader but wonīt show!!
{
  debug ("KMKernel::checkMail called");
  KMMainWin *mWin = 0;

  if (kapp->mainWidget() && kapp->mainWidget()->isA("KMMainWin"))
    mWin = (KMMainWin *) kapp->mainWidget();
  else
    mWin = new KMMainWin;
  mWin->slotCheckMail();
}

void KMKernel::openReader( KURL /*messageFile*/)
{
#warning Ugly hack! (sven)
  KMMainWin *mWin = 0;
  KTMainWindow *ktmw = 0;
  debug ("KMKernel::openReader called");

  if (KTMainWindow::memberList)
    for (ktmw = KTMainWindow::memberList->first(); ktmw;
         ktmw = KTMainWindow::memberList->next())
      if (ktmw->isA("KMMainWin"))
        break;

  if (ktmw)
    mWin = (KMMainWin *) ktmw;
  else
    mWin = new KMMainWin;
  mWin->show();
  //and "Activate" by kwin?

  //if (!messageFile.isEmpty())
  //  mWin->viewMessage(messageFile);
}

int KMKernel::openComposer (QString to, QString cc,
                            QString bcc, QString subject, int hidden)
{
  debug ("KMKernel::openComposer called");

  KMMessage *msg = new KMMessage;
  msg->initHeader();
  if (!cc.isEmpty()) msg->setCc(cc);
  if (!bcc.isEmpty()) msg->setBcc(bcc);
  if (!subject.isEmpty()) msg->setSubject(subject);
  if (!to.isEmpty()) msg->setTo(to);

  KMComposeWin *cWin = new KMComposeWin(msg);
  if (hidden == 0)
    cWin->show();
  //return cWin->composerId()
  return 1;
}

int KMKernel::setBody (int /*composerId*/, QString /*body*/)
{
  debug ("KMKernel::setBody called");
  return 1;
}

int KMKernel::addAttachment(int /*composerId*/, KURL /*url*/,
                            QString /*comment*/)
{
  debug ("KMKernel::addAttachment called");
  return 1;
}

int KMKernel::send(int /*composerId*/, int /*when*/)
{
  debug ("KMKernel::send called");
  return 1;
}

int KMKernel::ready()
{
  debug ("KMKernel::ready called");
  return 1;
}

/********************************************************************/
/*                        Kernel methods                            */
/********************************************************************/

void KMKernel::quit()
{
  // Called when all windows are closed. Will take care of compacting,
  // sending... should handle session management too!!
  
  if (msgSender() && msgSender()->sending()) // sender working?
  {
    kernel->msgSender()->quitWhenFinished(); // tell him to quit app when finished
    return;                        // don't quit now
  }
  kapp->quit();                           // sender not working, quit
}
  /* TODO later:
   Asuming that:
     - msgsender is nonblocking
       (our own, QSocketNotifier based. Pops up errors and sends signal
        senderFinished when done)
     - compacting is non blocking (insert processEvents there)

   o If we are getting mail, stop it (but donīt lose something!)
   o If we are sending mail, go on UNLESS this was called by SM,
       in which case stop ASAP that too (can we warn? should we continue
       on next start?)
   o If we are compacting, or expunging, go on UNLESS this was SM call.
       In that case stop compacting ASAP and continue on next start, before
       touching any folders.

   KMKernel::quit ()
   {
     SM call?
       if compacting, stop;
       if sending, stop;
       if receiving, stop;
       Windows will take care of themselves (composer should dump
        itīs messages, if any but not in deadMail)
       declare us ready for the End of the Session

     No, normal quit call
       All windows are off. Anything to do, should compact or sender sends?
         Yes, maybe put an icon in panel as a sign of life
         Folder manager, go compacting (*except* outbox and sent-mail!)
         if sender sending, connect us to his finished slot, declare us ready
                            for quit and wait for senderFinished
         if not, Folder manager, go compact sent-mail and outbox
}                (= call slotFinished())

void KMKernel::slotSenderFinished()
{
  good, Folder manager go compact sent-mail and outbox
  clean up stage1 (release folders and config, unregister from dcop)
    -- another kmail may start now ---
  kapp->quit();
}

void KMKernel::
void KMKernel::
*/


/********************************************************************/
/*            Init, Exit, and handler  methods                      */
/********************************************************************/
void KMKernel::testDir(const char *_name)
{
  DIR *dp;
  QString c = getenv("HOME");
  if(c.isEmpty())
  {
      KMessageBox::sorry(0, i18n("$HOME is not set!\n"
                                 "KMail cannot start without it.\n"));
      exit(-1);
  }
		
  c += _name;
  dp = opendir(c.data());
  if (dp == NULL) ::mkdir(c.data(), S_IRWXU);
  else closedir(dp);
}


//-----------------------------------------------------------------------------
// Open a composer for each message found in ~/dead.letter
//to control
void KMKernel::recoverDeadLetters(void)
{
  KMComposeWin* win;
  KMMessage* msg;
  QDir dir = QDir::home();
  QString fname = dir.path();
  int i, rc, num;

  if (!dir.exists("dead.letter")) return;
  fname += "/dead.letter";
  KMFolder folder(0, fname);

  folder.setAutoCreateIndex(FALSE);
  rc = folder.open();
  if (rc)
  {
    perror("cannot open file "+fname);
    return;
  }

  folder.quiet(TRUE);
  folder.open();

  num = folder.count();
  for (i=0; i<num; i++)
  {
    msg = folder.take(0);
    if (msg)
    {
      win = new KMComposeWin;
      win->setMsg(msg, FALSE);
      win->show();
    }
  }
  folder.close();
  unlink(fname);
}

void KMKernel::initFolders(KConfig* cfg)
{
  QString name;

  name = cfg->readEntry("inboxFolder");

  // Currently the folder manager cannot manage folders which are not
  // in the base folder directory.
  //if (name.isEmpty()) name = getenv("MAIL");

  if (name.isEmpty()) name = "inbox";

  the_inboxFolder  = (KMFolder*)the_folderMgr->findOrCreate(name);
  // inboxFolder->open();

  the_outboxFolder = the_folderMgr->findOrCreate(cfg->readEntry("outboxFolder", "outbox"));
  the_outboxFolder->setType("Out");
  the_outboxFolder->setWhoField("To");
  the_outboxFolder->setSystemFolder(TRUE);
  the_outboxFolder->open();

  the_sentFolder = the_folderMgr->findOrCreate(cfg->readEntry("sentFolder", "sent-mail"));
  the_sentFolder->setType("St");
  the_sentFolder->setWhoField("To");
  the_sentFolder->setSystemFolder(TRUE);
  the_sentFolder->open();

  the_trashFolder  = the_folderMgr->findOrCreate(cfg->readEntry("trashFolder", "trash"));
  the_trashFolder->setType("Tr");
  the_trashFolder->setSystemFolder(TRUE);
  the_trashFolder->open();

}


void KMKernel::init()
{
  debug ("entering KMKernel::init()");
  QCString  acctPath, foldersPath;
  KConfig* cfg;

  the_checkingMail = false;
  the_shuttingDown = false;
  the_server_is_ready = false;
  
  the_kbp = new KBusyPtr;
  cfg = kapp->config();
  //debug ("1");
  // Stefan: Yes, we really want this message handler. Without it,
  // kmail does not show vital warning() dialogs.
  //qInstallMsgHandler(&kmailMsgHandler);

  QDir dir;
  QString d = locateLocal("data", "kmail/");

  cfg->setGroup("General");
  the_firstStart = cfg->readBoolEntry("first-start", true);
  foldersPath = cfg->readEntry("folders", "");
  acctPath = cfg->readEntry("accounts", foldersPath + "/.kmail-accounts");

  if (foldersPath.isEmpty())
  {
    foldersPath = QDir::homeDirPath() + QString("/Mail");
    transferMail();
  }

  the_undoStack = new KMUndoStack(20);
  the_folderMgr = new KMFolderMgr(foldersPath);
  the_acctMgr   = new KMAcctMgr(acctPath);
  the_filterMgr = new KMFilterMgr;
  the_filterActionDict = new KMFilterActionDict;
  the_addrBook  = new KMAddrBook;

  initFolders(cfg);
  the_acctMgr->readConfig();
  the_filterMgr->readConfig();
  the_addrBook->readConfig();
  if(the_addrBook->load() == IO_FatalError)
  {
      KMessageBox::sorry(0, i18n("The addressbook could not be loaded."));
  }
  KMMessage::readConfig();
  the_msgSender = new KMSender;

  
  the_server_is_ready = true;
  
  // filterMgr->dump(); 
  debug ("exiting KMKernel::init()");
}

bool KMKernel::doSessionManagement()
{

  // Do session management
  if (kapp->isRestored()){
    int n = 1;
    while (KTMainWindow::canBeRestored(n)){
      //only restore main windows! (Matthias);
      if (KTMainWindow::classNameOfToplevel(n) == "KMMainWin")
        (new KMMainWin)->restore(n);
      n++;
    }
    return true; // we were restored by SM
  }
  return false;  // no, we were not restored
}

void KMKernel::cleanup(void)
{
  the_shuttingDown = TRUE;
  KConfig* config =  kapp->config();

  if (the_trashFolder) {
    the_trashFolder->close(TRUE);
    config->setGroup("General");
    if (config->readNumEntry("empty-trash-on-exit", 0))
      the_trashFolder->expunge();
  }

  if (the_folderMgr) {
    if (config->readNumEntry("compact-all-on-exit", 0))
      the_folderMgr->compactAll(); // I can compact for ages in peace now!
  }

  if (the_inboxFolder) the_inboxFolder->close(TRUE);
  if (the_outboxFolder) the_outboxFolder->close(TRUE);
  if (the_sentFolder) the_sentFolder->close(TRUE);

  if (the_msgSender) delete the_msgSender;
  if (the_addrBook) delete the_addrBook;
  if (the_filterMgr) delete the_filterMgr;
  if (the_acctMgr) delete the_acctMgr;
  if (the_folderMgr) delete the_folderMgr;
  if (the_kbp) delete the_kbp;

  //qInstallMsgHandler(oldMsgHandler);
  kapp->config()->sync();
  //--- Sven's save attachments to /tmp start ---
  //debug ("cleaned");
  QString cmd;
  // This is a dir with attachments and it is not critical if they are
  // left behind.
  if (!KMReaderWin::attachDir().isEmpty())
  {
    cmd.sprintf("rm -rf '%s'", (const char*)KMReaderWin::attachDir());
    system (cmd.data()); // delete your owns only
  }
  //--- Sven's save attachments to /tmp end ---
}

//Isnīt this obsolete? (sven)
void KMKernel::transferMail(void)
{
  QDir dir = QDir::home();
  int rc;

  // Stefan: This function is for all the whiners who think that KMail is
  // broken because they cannot read mail with pine and do not
  // know how to fix this problem with a simple symbolic link  =;-)
  // Markus: lol ;-)
  if (!dir.cd("KMail")) return;

  rc = KMessageBox::questionYesNo(0, 
         i18n(
	    "The directory ~/KMail exists. From now on, KMail uses the\n"
	    "directory ~/Mail for its messages.\n"
	    "KMail can move the contents of the directory ~/KMail into\n"
	    "~/Mail, but this will replace existing files with the same\n"
	    "name in the directory ~/Mail (e.g. inbox).\n\n"
	    "Shall KMail move the mail folders now ?"));

  if (rc == KMessageBox::No) return;

  dir.cd("/");  // otherwise we lock the directory
  testDir("/Mail");
  system("mv -f ~/KMail/* ~/Mail");
  system("mv -f ~/KMail/.??* ~/Mail");
  system("rmdir ~/KMail");
}


void KMKernel::ungrabPtrKb(void)
{
  if(!KTMainWindow::memberList) return;
  QWidget* widg = KTMainWindow::memberList->first();
  Display* dpy;

  if (!widg) return;
  dpy = widg->x11Display();
  XUngrabKeyboard(dpy, CurrentTime);
  XUngrabPointer(dpy, CurrentTime);
}


// Message handler
void KMKernel::kmailMsgHandler(QtMsgType aType, const char* aMsg)
{
  QString appName = kapp->caption();
  QString msg = aMsg;
  static int recurse=-1;

  recurse++;

  switch (aType)
  {
  case QtDebugMsg:
    kDebugInfo(0, msg);
    break;

  case QtWarningMsg:
    fprintf(stderr, "%s: %s\n", (const char*)kapp->name(), msg.data());
    kDebugInfo(0, msg);
    break;

  case QtFatalMsg:
    ungrabPtrKb();
    fprintf(stderr, appName+" "+i18n("fatal error")+": %s\n", msg.data());
    KMessageBox::error(0, aMsg);
    abort();
  }

  recurse--;
}
void KMKernel::dumpDeadLetters()
{
  QWidget *win;
  
  while (KTMainWindow::memberList->first() != 0)
  {
    win = KTMainWindow::memberList->take();
    if (win->inherits("KMComposeWin")) ((KMComposeWin*)win)->deadLetter();
    delete win;
  }
  cleanup();
  ::exit (1);
}



void KMKernel::action(bool mailto, bool check, QString to, QString cc,
                      QString bcc, QString subj, KURL messageFile)
{
  
  if (mailto)
    openComposer (to, cc, bcc, subj, 0);
  else
    openReader(messageFile);

  if (check)
    checkMail();
  //Anything else?
}

#include "kmkernel.moc"
