/**
 * @file ProgressBarQt.cpp
 * @brief Show a Progress-Bar with time estimation
 * @author Michael Koch
 * @date 25/03/2010

 */
#include "core/image/ImageT.h"
#include "core/vector/VectorT.h"
#include "core/vector/MatrixT.h"
#include <core/imagedisplay/ImageDisplay.h>
#include <core/imagedisplay/QtFramework.h>


#include <iostream>
#include <sys/time.h>

#include "vislearning/baselib/ProgressBarQt.h"


using namespace OBJREC;

using namespace std;

using namespace NICE;

ProgressBarQt::ProgressBarQt ( const std::string & _name, bool _useGraphics )
    : useGraphics ( _useGraphics )
{
  name = _name;
  step = 0;

  display_on = false;
  working = true;
  if ( graphicIsAvailable() )
  {
    if ( qApp == NULL )
    {
      QtFramework::instance();
    }

    dialogwindow = new QWidget;

    progressdialog = new QProgressDialog ( "Process at work ...", "Cancel",
                                           0, 100 );
    layout = new QGridLayout ( dialogwindow, 1, 1 );
    layout->addWidget ( progressdialog, 0, 0 );
    dialogwindow->setLayout ( layout );
  }
  reset ( _name );
}

ProgressBarQt::~ProgressBarQt()
{
}

void ProgressBarQt::timediff2str ( char *text, long time )
{
  int seconds;
  int minutes;
  int hours;
  int milliseconds;

  milliseconds = time % 100;
  time /= 100;
  seconds = time % 60;
  time /= 60;
  minutes = time % 60;
  time /= 60;
  hours = time;

  if ( hours != 0 )
  {
    sprintf ( text, "%dh %dm %d.%d s", hours, minutes, seconds, milliseconds );
  }
  else if ( minutes != 0 )
  {
    sprintf ( text, "%dm %d.%d s", minutes, seconds, milliseconds );
  }
  else
  {
    sprintf ( text, "%d.%d s", seconds, milliseconds );
  }
}

void ProgressBarQt::displayTimeStat ( int posy, char *text, long time )
{
  // Text (char *str,int x0,int y0,int val,int exp,Image img);
  char disptext[200];
  char timetext[200];

  timediff2str ( timetext, time );
  sprintf ( disptext, "%s %s", text, timetext );

}

double ProgressBarQt::getCurrentTime()
{
  struct timeval curtime;

  gettimeofday ( &curtime, NULL );

  return curtime.tv_sec * 100.0 + curtime.tv_usec / 10000.0;
}

void ProgressBarQt::show()
{
  if ( !display_on )
  {
    display_on = true;
  }
  if ( graphicIsAvailable() )
  {
    if ( qApp == NULL )
    {
      QtFramework::instance();
    }
    dialogwindow->show();
  }
}

void ProgressBarQt::hide()
{

  if ( display_on )
  {
    //  Show ( OFF, display, name );
    display_on = false;
  }
  if ( graphicIsAvailable() )
  {
    dialogwindow->hide();
  }
}

void ProgressBarQt::stop()
{

  working = false;
}

void ProgressBarQt::reset ( const std::string & _name )
{
  name = _name;
  step = 0;
  elapsed_time = 0;
  avg_time_step = 0;
  start_time = getCurrentTime();
}

void ProgressBarQt::update ( int count )
{
  step++;

  double progress = step / ( double ) count;

  elapsed_time = getCurrentTime() - start_time;
  avg_time_step = elapsed_time / step;
  estimated_time = ( count - step ) * avg_time_step;

  size_t mod;
  if ( avg_time_step > 50.0 )
    mod = 1;
  else
    mod = ( size_t ) ( 50.0 / avg_time_step ) + 1;

  if ( ( mod <= 1 ) || ( step % mod == 0 ) )
  {
    char percent_text[10];
    sprintf ( percent_text, "%4.2f %%", step * 100.0 / count );

    displayTimeStat ( 0, "Elapsed Time : ", ( long int ) elapsed_time );
    displayTimeStat ( 1, "Estimated Time : ", ( long int ) estimated_time );
    displayTimeStat ( 2, "Avg. Time per step : ", ( long int ) avg_time_step );

    char eltime[200];
    char estime[200];
    char avgtime[200];
    timediff2str ( eltime, ( long int ) elapsed_time );
    timediff2str ( estime, ( long int ) estimated_time );
    timediff2str ( avgtime, ( long int ) avg_time_step );
    fprintf (
      stderr,
      "[PROGRESS] %s %s (elapsed time %s, estimated time %s, avg %s), \n",
      name.c_str(), percent_text, eltime, estime, avgtime );
    //set progress value.
    if ( graphicIsAvailable() )
    {
      progressdialog->setValue ( progress * 100 );
    }
  }
}

bool ProgressBarQt::graphicIsAvailable()
{
  return ( useGraphics && ( getenv ( "DISPLAY" ) != NULL ) );
}