// QT includes
#include <QFile>
#include <QFileInfo>
#include <QApplication>

// PythonQT includes
#include <PythonQt.h>

// CTK includes
#include "ctkSimplePythonManager.h"
#include "ctkSimplePythonQtDecorators.h"

#include "ctkSimplePythonShellConfigure.h" // For CTK_WRAP_PYTHONQT_{LIGHT, FULL} and CTK_BUILD_SHARED_LIBS

#if defined(CTK_WRAP_PYTHONQT_LIGHT) || defined(CTK_WRAP_PYTHONQT_FULL)
# ifndef CTK_BUILD_SHARED_LIBS
  // PythonQt wrapper initialization methods
  @CTK_PYTHONQT_INITIALIZATION_METHOD_DEFINITION@
# endif
#endif

#ifdef CTK_WRAP_PYTHONQT_USE_VTK
# if defined(CMAKE_INTDIR)
#  define VTK_PYTHON_LIBRARY_DIR VTK_PYTHON_LIBRARY_DIR_BUILD "/" CMAKE_INTDIR
# else
#  define VTK_PYTHON_LIBRARY_DIR VTK_PYTHON_LIBRARY_DIR_BUILD
# endif
#endif

//-----------------------------------------------------------------------------
ctkSimplePythonManager::ctkSimplePythonManager(QObject* _parent) : Superclass(_parent)
{
}

//-----------------------------------------------------------------------------
ctkSimplePythonManager::~ctkSimplePythonManager()
{
}

//-----------------------------------------------------------------------------
QStringList ctkSimplePythonManager::pythonPaths()
{
  QStringList paths;
  paths << Superclass::pythonPaths();

  QString self_dir = QFileInfo(qApp->applicationFilePath()).absolutePath();

  QString ctk_python_dir = self_dir;
  #if defined(CMAKE_INTDIR)
    ctk_python_dir.append("/..");
  #endif
  ctk_python_dir.append("/Python");
  paths << QFileInfo(ctk_python_dir).absoluteFilePath();

#ifdef CTK_BUILD_SHARED_LIBS
  // Path containing python module
  paths << self_dir;
#endif

#ifdef CTK_WRAP_PYTHONQT_USE_VTK

  // Try to put the VTK python module location in sys.path.
  QString vtk_build_dir = "/../../CMakeExternals/Build/VTK/Wrapping/Python";
  bool found_vtk = false;
  QString vtk_package_dir = self_dir;

#if defined(CMAKE_INTDIR)
  vtk_package_dir.append("/..");
#endif
  vtk_package_dir.append(vtk_build_dir);
  QFileInfo fi(vtk_package_dir);
  vtk_package_dir = fi.absoluteFilePath();
  if (fi.isDir())
    {
    // This executable is running from the build tree.  Prepend the
    // library directory and package directory to the search path.
    paths << vtk_package_dir;
    paths << VTK_PYTHON_LIBRARY_DIR;
    found_vtk = true;
    }

  Q_ASSERT(found_vtk);
  if (!found_vtk)
    {
    // TODO Handle case when the application is started from an installed tree
    }
#endif

  return paths;
}

//-----------------------------------------------------------------------------
void ctkSimplePythonManager::preInitialization()
{
  Superclass::preInitialization();

#if defined(CTK_WRAP_PYTHONQT_LIGHT) || defined(CTK_WRAP_PYTHONQT_FULL)
# ifndef CTK_BUILD_SHARED_LIBS
  // Initialize wrappers
  @CTK_PYTHONQT_INITIALIZATION_METHOD_CALL@
# endif
#endif

  // Register decorators
  this->registerPythonQtDecorator(new ctkSimplePythonQtDecorators(this));

  // Add object to python interpreter context
  this->addObjectToPythonMain("_ctkSimplePythonShellInstance", qApp);
}

//-----------------------------------------------------------------------------
void ctkSimplePythonManager::executeInitializationScripts()
{
  QString self_dir = QFileInfo(qApp->applicationFilePath()).absolutePath();

  QString initFile = self_dir;
  #if defined(CMAKE_INTDIR)
  initFile.append("/..");
  #endif
  initFile.append("/Python/ctkSimplePythonShell.py");

  Q_ASSERT(QFile::exists(initFile));

  // Evaluate application script
  this->executeFile(initFile);
}