//===========================================
//  Lumina-DE source code
//  Copyright (c) 2016, Ken Moore
//  Available under the 3-clause BSD license
//  See the LICENSE file for full details
//===========================================
#include "session.h"

#include <QObject>
#include <QProcess>
#include <QProcessEnvironment>
#include <QDebug>
#include <LuminaUtils.h>


void LSession::stopall(){
  stopping = true;
  for(int i=0; i<PROCS.length(); i++){
    if(PROCS[i]->state()!=QProcess::NotRunning){ PROCS[i]->kill(); }
  }
  QCoreApplication::processEvents();
  for(int i=0; i<PROCS.length(); i++){
    if(PROCS[i]->state()!=QProcess::NotRunning){ PROCS[i]->terminate(); }
  }
  //QCoreApplication::exit(0);
}

void LSession::procFinished(){
  //Go through and check the status on all the procs to determine which one finished
  int stopped = 0;
  for(int i=0; i<PROCS.length(); i++){
    if(PROCS[i]->state()==QProcess::NotRunning){
      stopped++;
      if(!stopping){
        //See if this process is the main desktop binary
        if(PROCS[i]->program().section("/",-1) == "Lumina-DE"){ stopall();  } //start closing down everything
        //else{ PROCS[i]->start(QIODevice::ReadOnly); } //restart the process
        break;
      }
    }
  }
  if(stopping && stopped==PROCS.length()){
    QCoreApplication::exit(0);
  }
}

void LSession::startProcess(QString ID, QString command){
  QString dir = QDir::homePath()+"/.lumina/logs";
  if(!QFile::exists(dir)){ QDir tmp(dir); tmp.mkpath(dir); }
  QString logfile = dir+"/"+ID+".log";
  if(QFile::exists(logfile+".old")){ QFile::remove(logfile+".old"); }
  if(QFile::exists(logfile)){ QFile::rename(logfile,logfile+".old"); }

  QProcess *proc = new QProcess();
  proc->setProcessChannelMode(QProcess::MergedChannels);
  proc->setProcessEnvironment( QProcessEnvironment::systemEnvironment() );
  proc->setStandardOutputFile(logfile);
  proc->start(command, QIODevice::ReadOnly);
  connect(proc, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(procFinished()) );
  PROCS << proc;
}

void LSession::start(){
  //First check for a valid installation
  if( !LUtils::isValidBinary("fluxbox") || !LUtils::isValidBinary("Lumina-DE") ){
    exit(1);
  }
  //Window Manager First
  // FLUXBOX BUG BYPASS: if the ~/.fluxbox dir does not exist, it will ignore the given config file
  //if(!QFile::exists(QDir::homePath()+"/.fluxbox")){ QDir dir; dir.mkpath(QDir::homePath()+"/.fluxbox"); }
  //startProcess("wm", "fluxbox -rc "+QDir::homePath()+"/.lumina/fluxbox-init -no-slit -no-toolbar");
  //Desktop Next
  startProcess("runtime","Lumina-DE");
  //ScreenSaver
  if(LUtils::isValidBinary("xscreensaver")){ startProcess("screensaver","xscreensaver -no-splash"); }
  //Compositing manager
  if(LUtils::isValidBinary("xcompmgr")){ startProcess("compositing","xcompmgr"); }
}