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

  Library:   CTK

  Copyright (c) Kitware Inc.

  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.txt

  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.

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

// CTK includes
#include "ctkDICOMTableManager.h"
#include "ctkDICOMTableView.h"
#include "ui_ctkDICOMTableManager.h"

// Qt includes
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QResizeEvent>
#include <QSplitter>

class ctkDICOMTableManagerPrivate : public Ui_ctkDICOMTableManager
{
  Q_DECLARE_PUBLIC(ctkDICOMTableManager)

protected:
  ctkDICOMTableManager* const q_ptr;

public:
  ctkDICOMTableManagerPrivate(ctkDICOMTableManager& obj);
  ~ctkDICOMTableManagerPrivate();

  void init();
  void setDICOMDatabase(ctkDICOMDatabase *db);

  ctkDICOMDatabase* dicomDatabase;

  bool m_DynamicTableLayout;
};

//------------------------------------------------------------------------------

ctkDICOMTableManagerPrivate::ctkDICOMTableManagerPrivate(ctkDICOMTableManager &obj)
  : q_ptr(&obj)
  , m_DynamicTableLayout(false)
{

}

//------------------------------------------------------------------------------

ctkDICOMTableManagerPrivate::~ctkDICOMTableManagerPrivate()
{

}

//------------------------------------------------------------------------------

void ctkDICOMTableManagerPrivate::init()
{
  //setup UI
  Q_Q(ctkDICOMTableManager);
  this->setupUi(q);

  this->patientsTable->setQueryTableName("Patients");
  this->studiesTable->setQueryTableName("Studies");
  this->studiesTable->setQueryForeignKey("PatientsUID");
  this->seriesTable->setQueryTableName("Series");
  this->seriesTable->setQueryForeignKey("StudyInstanceUID");

  q->setDisplayDensity(ctkDICOMTableManager::Comfortable);

  // For propagating patient selection changes
  QObject::connect(this->patientsTable, SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
                   q, SIGNAL(patientsSelectionChanged(const QItemSelection&, const QItemSelection&)));
  QObject::connect(this->patientsTable, SIGNAL(selectionChanged(const QStringList&)),
                   q, SIGNAL(patientsSelectionChanged(const QStringList&)));

  // For propagating study selection changes
  QObject::connect(this->studiesTable, SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
                   q, SIGNAL(studiesSelectionChanged(const QItemSelection&, const QItemSelection&)));
  QObject::connect(this->studiesTable, SIGNAL(selectionChanged(const QStringList&)),
                   q, SIGNAL(studiesSelectionChanged(const QStringList&)));

  // For propagating series selection changes
  QObject::connect(this->seriesTable, SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
                   q, SIGNAL(seriesSelectionChanged(const QItemSelection&, const QItemSelection&)));
  QObject::connect(this->seriesTable, SIGNAL(selectionChanged(const QStringList&)),
                   q, SIGNAL(seriesSelectionChanged(const QStringList&)));

  QObject::connect(this->seriesTable, SIGNAL(doubleClicked(const QModelIndex&)),
                   q, SIGNAL(seriesDoubleClicked(const QModelIndex&)));
}

//------------------------------------------------------------------------------

void ctkDICOMTableManagerPrivate::setDICOMDatabase(ctkDICOMDatabase* db)
{
  this->patientsTable->setDicomDataBase(db);
  this->studiesTable->setDicomDataBase(db);
  this->seriesTable->setDicomDataBase(db);
  this->dicomDatabase = db;
}

//----------------------------------------------------------------------------
// ctkDICOMTableManager methods

//----------------------------------------------------------------------------
ctkDICOMTableManager::ctkDICOMTableManager(QWidget *parent)
  :Superclass(parent)
  , d_ptr(new ctkDICOMTableManagerPrivate(*this))
{
  Q_D(ctkDICOMTableManager);
  d->init();
}

//------------------------------------------------------------------------------
ctkDICOMTableManager::ctkDICOMTableManager(ctkDICOMDatabase *db, QWidget *parent)
  : Superclass(parent)
  , d_ptr(new ctkDICOMTableManagerPrivate(*this))
{
  Q_D(ctkDICOMTableManager);
  d->init();
  d->setDICOMDatabase(db);
}

//------------------------------------------------------------------------------
ctkDICOMTableManager::~ctkDICOMTableManager()
{

}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::setDICOMDatabase(ctkDICOMDatabase* db)
{
  Q_D(ctkDICOMTableManager);
  d->setDICOMDatabase(db);
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::setTableOrientation(const Qt::Orientation &o) const
{
  Q_D(const ctkDICOMTableManager);
  d->tableSplitter->setOrientation(o);
}

//------------------------------------------------------------------------------
Qt::Orientation ctkDICOMTableManager::tableOrientation()
{
  Q_D(ctkDICOMTableManager);
  return d->tableSplitter->orientation();
}

//------------------------------------------------------------------------------
QStringList ctkDICOMTableManager::currentPatientsSelection()
{
  Q_D(ctkDICOMTableManager);
  return d->patientsTable->currentSelection();
}

//------------------------------------------------------------------------------
QStringList ctkDICOMTableManager::currentStudiesSelection()
{
  Q_D(ctkDICOMTableManager);
  return d->studiesTable->currentSelection();
}

//------------------------------------------------------------------------------
QStringList ctkDICOMTableManager::currentSeriesSelection()
{
  Q_D(ctkDICOMTableManager);
  return d->seriesTable->currentSelection();
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::onPatientsQueryChanged(const QStringList &uids)
{
  Q_D(ctkDICOMTableManager);
  const std::pair<QString, QStringList> patientCondition("Patients.UID", uids);
  d->seriesTable->addSqlWhereCondition(patientCondition);
  d->studiesTable->addSqlWhereCondition(patientCondition);
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::onStudiesQueryChanged(const QStringList &uids)
{
  Q_D(ctkDICOMTableManager);
  const std::pair<QString, QStringList> studiesCondition("Studies.StudyInstanceUID", uids);
  d->seriesTable->addSqlWhereCondition(studiesCondition);
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::onPatientsSelectionChanged(const QStringList &uids)
{
  std::pair<QString, QStringList> patientCondition;
  patientCondition.first = "Patients.UID";
  Q_D(ctkDICOMTableManager);
  if (!uids.empty())
    {
      patientCondition.second = uids;
    }
  else
    {
      patientCondition.second = d->patientsTable->uidsForAllRows();
    }
  d->studiesTable->addSqlWhereCondition(patientCondition);
  d->seriesTable->addSqlWhereCondition(patientCondition);
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::onStudiesSelectionChanged(const QStringList &uids)
{
  std::pair<QString, QStringList> studiesCondition;
  studiesCondition.first = "Studies.StudyInstanceUID";
  Q_D(ctkDICOMTableManager);
  if (!uids.empty())
    {
      studiesCondition.second = uids;
    }
  else
    {
      studiesCondition.second = d->studiesTable->uidsForAllRows();
    }
  d->seriesTable->addSqlWhereCondition(studiesCondition);
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::setDynamicTableLayout(bool dynamic)
{
  Q_D(ctkDICOMTableManager);
  d->m_DynamicTableLayout = dynamic;
}

bool ctkDICOMTableManager::dynamicTableLayout() const
{
  Q_D(const ctkDICOMTableManager);
  return d->m_DynamicTableLayout;
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::updateTableViews()
{
  Q_D(ctkDICOMTableManager);
  d->patientsTable->setQuery();
  d->studiesTable->setQuery();
  d->seriesTable->setQuery();
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::resizeEvent(QResizeEvent *e)
{
  this->Superclass::resizeEvent(e);
  Q_D(ctkDICOMTableManager);
  if (!d->m_DynamicTableLayout)
    return;

  //Minimum size = 800 * 1.28 = 1024 => use horizontal layout (otherwise table size would be too small)
  this->setTableOrientation(e->size().width() > 1.28*this->minimumWidth() ? Qt::Horizontal : Qt::Vertical);
}

//------------------------------------------------------------------------------
void ctkDICOMTableManager::setDisplayDensity(DisplayDensity density)
{
  Q_D(ctkDICOMTableManager);

  // Compact density
  if (density == ctkDICOMTableManager::Compact)
  {
    d->patientsTable->setTableSectionSize(15);
    d->studiesTable->setTableSectionSize(15);
    d->seriesTable->setTableSectionSize(15);
  }
  // Cozy density
  if (density == ctkDICOMTableManager::Cozy)
  {
    d->patientsTable->setTableSectionSize(20);
    d->studiesTable->setTableSectionSize(20);
    d->seriesTable->setTableSectionSize(20);
  }
  // Comfortable density
  if (density == ctkDICOMTableManager::Comfortable)
  {
    d->patientsTable->setTableSectionSize(30);
    d->studiesTable->setTableSectionSize(30);
    d->seriesTable->setTableSectionSize(30);
  }
}

//------------------------------------------------------------------------------
ctkDICOMTableManager::DisplayDensity ctkDICOMTableManager::displayDensity()
{
  Q_D(ctkDICOMTableManager);
  int sectionSize;
  sectionSize = d->patientsTable->tableSectionSize();

  ctkDICOMTableManager::DisplayDensity density;
  if (sectionSize == 30)
  {
    density = ctkDICOMTableManager::Comfortable;
  }
  else if (sectionSize == 20)
  {
    density = ctkDICOMTableManager::Cozy;
  }
  else if (sectionSize == 15)
  {
    density = ctkDICOMTableManager::Compact;
  }
   return density;
}