/*=============================================================================

  Library: CTK

  Copyright (c) German Cancer Research Center,
    Division of Medical and Biological Informatics

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

=============================================================================*/

// Qt includes
#include <QtPlugin>
#include <QRect>
#include <QDebug>
#include <QPushButton>
#include <QApplication>
#include <QLabel>

// CTK includes
#include "ctkDICOMImage.h"
#include "ctkExampleDicomAppLogic_p.h"
#include "ctkExampleDicomAppPlugin_p.h"

// DCMTK includes
#include <dcmimage.h>

//----------------------------------------------------------------------------
ctkExampleDicomAppLogic::ctkExampleDicomAppLogic():
ctkDicomAbstractApp(ctkExampleDicomAppPlugin::getPluginContext()), Button(0)
{


  connect(this, SIGNAL(startProgress()), this, SLOT(onStartProgress()), Qt::QueuedConnection);
  connect(this, SIGNAL(resumeProgress()), this, SLOT(onResumeProgress()), Qt::QueuedConnection);
  connect(this, SIGNAL(suspendProgress()), this, SLOT(onSuspendProgress()), Qt::QueuedConnection);
  connect(this, SIGNAL(cancelProgress()), this, SLOT(onCancelProgress()), Qt::QueuedConnection);
  connect(this, SIGNAL(exitHostedApp()), this, SLOT(onExitHostedApp()), Qt::QueuedConnection);

  //notify Host we are ready.
  getHostInterface()->notifyStateChanged(ctkDicomAppHosting::IDLE);
}

//----------------------------------------------------------------------------
ctkExampleDicomAppLogic::~ctkExampleDicomAppLogic()
{
  ctkPluginContext* context = ctkExampleDicomAppPlugin::getPluginContext();
  QList <QSharedPointer<ctkPlugin> > plugins = context->getPlugins();
  for (int i = 0; i < plugins.size(); ++i)
  {
    qDebug() << plugins.at(i)->getSymbolicName ();
  }
}



//----------------------------------------------------------------------------
bool ctkExampleDicomAppLogic::bringToFront(const QRect& /*requestedScreenArea*/)
{
  return false;
}

//----------------------------------------------------------------------------
void ctkExampleDicomAppLogic::do_something()
{
  this->Button = new QPushButton("Button from App");
  connect(this->Button, SIGNAL(clicked()), this, SLOT(buttonClicked()));
  try
    {
    QRect preferred(50,50,100,100);
    qDebug() << "  Asking:getAvailableScreen";
    QRect rect = getHostInterface()->getAvailableScreen(preferred);
    qDebug() << "  got sth:" << rect.top();
    this->Button->move(rect.topLeft());
    this->Button->resize(rect.size());
    }
  catch (const std::runtime_error& e)
    {
    qCritical() << e.what();
    return;
    }
  this->Button->show();
}

//----------------------------------------------------------------------------
void ctkExampleDicomAppLogic::onStartProgress()
{
  setInternalState(ctkDicomAppHosting::INPROGRESS);

  // we need to create the button before we receive data from
  // the host, which happens immediately after calling
  // getHostInterface()->notifyStateChanged
  do_something(); 

  getHostInterface()->notifyStateChanged(ctkDicomAppHosting::INPROGRESS);
}

//----------------------------------------------------------------------------
void ctkExampleDicomAppLogic::onResumeProgress()
{
  //reclame all resources.

  //notify state changed
  setInternalState(ctkDicomAppHosting::INPROGRESS);
  getHostInterface()->notifyStateChanged(ctkDicomAppHosting::INPROGRESS);
  //we're rolling
  //do something else normally, but this is an example
  this->Button->setEnabled(true);
}

//----------------------------------------------------------------------------
void ctkExampleDicomAppLogic::onSuspendProgress()
{
  //release resources it can reclame later to resume work
  this->Button->setEnabled(false);
  //notify state changed
  setInternalState(ctkDicomAppHosting::SUSPENDED);
  getHostInterface()->notifyStateChanged(ctkDicomAppHosting::SUSPENDED);
  //we're rolling
  //do something else normally, but this is an example
}

//----------------------------------------------------------------------------
void ctkExampleDicomAppLogic::onCancelProgress()
{
  //release all resources
  onReleaseResources();
  //update state
  setInternalState(ctkDicomAppHosting::IDLE);
  getHostInterface()->notifyStateChanged(ctkDicomAppHosting::IDLE);
}

//----------------------------------------------------------------------------
void ctkExampleDicomAppLogic::onExitHostedApp()
{
  //useless move, but correct:
  setInternalState(ctkDicomAppHosting::EXIT);
  getHostInterface()->notifyStateChanged(ctkDicomAppHosting::EXIT);
  //die
  qApp->exit(0);
}

//----------------------------------------------------------------------------
void ctkExampleDicomAppLogic::onReleaseResources()
{
  this->Button->hide();
  delete (this->Button);
  this->Button = 0 ;
}


//----------------------------------------------------------------------------
bool ctkExampleDicomAppLogic::notifyDataAvailable(const ctkDicomAppHosting::AvailableData& data, bool lastData)
{
  Q_UNUSED(lastData)
  QString s;
  if(this->Button == 0)
    {
    qCritical() << "Button is null!";
    return false;
    }
  s = "Received notifyDataAvailable with patients.count()= " + QString().setNum(data.patients.count());
  if(data.patients.count()>0)
    {
    s=s+" name:"+data.patients.begin()->name+" studies.count(): "+QString().setNum(data.patients.begin()->studies.count());
    if(data.patients.begin()->studies.count()>0)
    {
      s=s+" series.count():" + QString().setNum(data.patients.begin()->studies.begin()->series.count());
      if(data.patients.begin()->studies.begin()->series.count()>0)
      {
        s=s+" uid:" + data.patients.begin()->studies.begin()->series.begin()->seriesUID;
//        QUuid uuid("93097dc1-caf9-43a3-a814-51a57f8d861d");//data.patients.begin()->studies.begin()->series.begin()->seriesUID);
        uuid = data.patients.begin()->studies.begin()->series.begin()->objectDescriptors.begin()->descriptorUUID;
        s=s+" uuid:"+uuid.toString();
      }
    }
  }
  this->Button->setText(s);
  return false;
}

//----------------------------------------------------------------------------
QList<ctkDicomAppHosting::ObjectLocator> ctkExampleDicomAppLogic::getData(
  const QList<QUuid>& objectUUIDs,
  const QList<QString>& acceptableTransferSyntaxUIDs,
  bool includeBulkData)
{
  Q_UNUSED(objectUUIDs)
  Q_UNUSED(acceptableTransferSyntaxUIDs)
  Q_UNUSED(includeBulkData)
  return QList<ctkDicomAppHosting::ObjectLocator>();
}

//----------------------------------------------------------------------------
void ctkExampleDicomAppLogic::releaseData(const QList<QUuid>& objectUUIDs)
{
  Q_UNUSED(objectUUIDs)
}



void ctkExampleDicomAppLogic::buttonClicked()
{
  QList<QUuid> uuidlist;
  uuidlist.append(uuid);
  QString transfersyntax("1.2.840.10008.1.2.1");
  QList<QString> transfersyntaxlist;
  transfersyntaxlist.append(transfersyntax);
  QList<ctkDicomAppHosting::ObjectLocator> locators;
  locators = getHostInterface()->getData(uuidlist, transfersyntaxlist, false);
  qDebug() << "got locators! " << QString().setNum(locators.count());

  QString s;
  s=s+" loc.count:"+QString().setNum(locators.count());
  if(locators.count()>0)
  {
    s=s+" URI: "+locators.begin()->URI +" locatorUUID: "+locators.begin()->locator+" sourceUUID: "+locators.begin()->source;
    qDebug() << "URI: " << locators.begin()->URI;
    QString filename = locators.begin()->URI;
    if(filename.startsWith("file:/",Qt::CaseInsensitive))
      filename=filename.remove(0,8);
    qDebug()<<filename;
    DicomImage dcmtkImage(filename.toLatin1().data());
    ctkDICOMImage ctkImage(&dcmtkImage);

    QLabel* qtImage = new QLabel;
    QPixmap pixmap = QPixmap::fromImage(ctkImage.frame(0),Qt::AvoidDither);
    if (pixmap.isNull())
    {
      qCritical() << "Failed to convert QImage to QPixmap" ;
    }
    else
    {
      qtImage->setPixmap(pixmap);
      qtImage->show();
    }
  }
  this->Button->setText(s);
}