#include "pqCustomViewButtonDialog.h"

#include "ui_pqCustomViewButtonDialog.h"

#include <QDebug>

#include "vtkIndent.h"
#include "vtkSmartPointer.h"
#include "vtkPVXMLElement.h"
#include "vtkPVXMLParser.h"
#include "vtkSMCameraConfigurationFileInfo.h"

#include "pqFileDialog.h"

#include <string>
#include <sstream>

#define pqErrorMacro(estr)\
  qDebug()\
      << "Error in:" << endl\
      << __FILE__ << ", line " << __LINE__ << endl\
      << "" estr << endl;

// User interface
//=============================================================================
class pqCustomViewButtonDialogUI
    :
  public Ui::pqCustomViewButtonDialog
    {};

// Organizes button config file info in a single location.
//=============================================================================
class pqCustomViewButtonFileInfo
{
public:
  pqCustomViewButtonFileInfo()
        :
    FileIdentifier("CustomViewButtonConfiguration"),
    FileDescription("Custom View Button Configuration"),
    FileExtension(".pvcvbc"),
    WriterVersion("1.0")
      {}
  const char *FileIdentifier;
  const char *FileDescription;
  const char *FileExtension;
  const char *WriterVersion;
};

//------------------------------------------------------------------------------
const QString pqCustomViewButtonDialog::DEFAULT_TOOLTIP = QString("not configured.");

//------------------------------------------------------------------------------
pqCustomViewButtonDialog::pqCustomViewButtonDialog(
    QWidget *Parent,
    Qt::WindowFlags flags,
    QStringList &toolTips,
    QStringList &configs,
    QString &curConfig)
            :
    QDialog(Parent,flags),
    NButtons(0),
    ui(0)
{
  this->ui = new pqCustomViewButtonDialogUI;
  this->ui->setupUi(this);

  this->ToolTips
      << this->ui->toolTip0
      << this->ui->toolTip1
      << this->ui->toolTip2
      << this->ui->toolTip3;
  this->NButtons=4;

  this->setToolTips(toolTips);
  this->setConfigurations(configs);
  this->setCurrentConfiguration(curConfig);

  QObject::connect(
    this->ui->clearAll, SIGNAL(clicked()),
    this, SLOT(clearAll()));

  QObject::connect(
    this->ui->importAll, SIGNAL(clicked()),
    this, SLOT(importConfigurations()));

  QObject::connect(
    this->ui->exportAll, SIGNAL(clicked()),
    this, SLOT(exportConfigurations()));

  QObject::connect(
    this->ui->assignCurrentView0, SIGNAL(clicked()),
    this, SLOT(assignCurrentView0()));

  QObject::connect(
    this->ui->assignCurrentView1, SIGNAL(clicked()),
    this, SLOT(assignCurrentView1()));

  QObject::connect(
    this->ui->assignCurrentView2, SIGNAL(clicked()),
    this, SLOT(assignCurrentView2()));

  QObject::connect(
    this->ui->assignCurrentView3, SIGNAL(clicked()),
    this, SLOT(assignCurrentView3()));
}

//------------------------------------------------------------------------------
pqCustomViewButtonDialog::~pqCustomViewButtonDialog()
{
  delete this->ui;
  this->ui = NULL;
}

//------------------------------------------------------------------------------
void pqCustomViewButtonDialog::setToolTips(QStringList &toolTips)
{
  if (toolTips.length()!=this->NButtons)
    {
    pqErrorMacro("Error: Wrong number of tool tips.");
    return;
    }

  for (int i=0; i<this->NButtons; ++i)
    {
    this->ToolTips[i]->setText(toolTips[i]);
    }
}

//------------------------------------------------------------------------------
QStringList pqCustomViewButtonDialog::getToolTips()
{
  QStringList toolTips;
  for (int i=0; i<this->NButtons; ++i)
    {
    toolTips << this->ToolTips[i]->text();
    }
  return toolTips;
}

//------------------------------------------------------------------------------
void pqCustomViewButtonDialog::setConfigurations(QStringList &configs)
{
  if (configs.length()!=this->NButtons)
    {
    pqErrorMacro("Error: Wrong number of configurations.");
    return;
    }

  this->Configurations=configs;
}

//------------------------------------------------------------------------------
QStringList pqCustomViewButtonDialog::getConfigurations()
{
  return this->Configurations;
}

//------------------------------------------------------------------------------
void pqCustomViewButtonDialog::setCurrentConfiguration(QString &config)
{
  this->CurrentConfiguration=config;
}

//------------------------------------------------------------------------------
QString pqCustomViewButtonDialog::getCurrentConfiguration()
{
  return this->CurrentConfiguration;
}

//------------------------------------------------------------------------------
void pqCustomViewButtonDialog::importConfigurations()
{
  // What follows is a reader for an xml format that contains
  // a group of nested Camera Configuration XML hierarchies
  // each written by the vtkSMCameraConfigurationWriter.
  // The nested configuration hierarchies might be empty.
  pqCustomViewButtonFileInfo fileInfo;

  QString filters
    = QString("%1 (*%2);;All Files (*.*)")
        .arg(fileInfo.FileDescription).arg(fileInfo.FileExtension);

  pqFileDialog dialog(0,this,"Load Custom View Button Configuration","",filters);
  dialog.setFileMode(pqFileDialog::ExistingFile);

  if (dialog.exec()==QDialog::Accepted)
    {
    QString filename;
    filename=dialog.getSelectedFiles()[0];

    vtkSmartPointer<vtkPVXMLParser> parser=vtkSmartPointer<vtkPVXMLParser>::New();
    parser->SetFileName(filename.toStdString().c_str());
    if (parser->Parse()==0)
      {
      pqErrorMacro("Invalid XML in file: " << filename << ".");
      return;
      }

    vtkPVXMLElement *root=parser->GetRootElement();
    if (root==0)
      {
      pqErrorMacro("Invalid XML in file: " << filename << ".");
      return;
      }

    // check type
    std::string requiredType(fileInfo.FileIdentifier);
    const char *foundType=root->GetName();
    if (foundType==0 || foundType!=requiredType)
      {
      pqErrorMacro(
          << "This is not a valid " << fileInfo.FileDescription
          << " XML hierarchy.");
      return;
      }

    // check version
    const char *foundVersion=root->GetAttribute("version");
    if (foundVersion==0)
      {
      pqErrorMacro("No version attribute was found.");
      return;
      }
    std::string requiredVersion(fileInfo.WriterVersion);
    if (foundVersion!=requiredVersion)
      {
      pqErrorMacro("Unsupported version " << foundVersion << ".");
      return;
      }

    // read buttons, their toolTips, and configurations.
    QStringList toolTips;
    QStringList configs;
    for (int i=0; i<this->NButtons; ++i)
      {
      // button
      QString buttonTagId=QString("CustomViewButton%1").arg(i);
      vtkPVXMLElement *button=root->FindNestedElementByName(buttonTagId.toStdString().c_str());
      if (button==0)
        {
        pqErrorMacro("Missing " << buttonTagId << " representation.");
        return;
        }

      // tool tip
      vtkPVXMLElement *tip=button->FindNestedElementByName("ToolTip");
      if (tip==0)
        {
        pqErrorMacro(<< buttonTagId << " is missing ToolTip.");
        return;
        }
      const char *tipValue=tip->GetAttribute("value");
      if (tipValue==0)
        {
        pqErrorMacro("In " << buttonTagId
            << " ToolTip is missing value attribute.");
        return;
        }

      toolTips << tipValue;

      // Here are the optionally nested Camera Configurations.
      vtkPVXMLElement *config=button->FindNestedElementByName("Configuration");
      if (config==0)
        {
        pqErrorMacro(<< buttonTagId << " is missing Configuration.");
        return;
        }
      const char *isEmptyValue=config->GetAttribute("is_empty");
      if (isEmptyValue==0)
        {
        pqErrorMacro("In " << buttonTagId
            << " Configuration is missing is_empty attribute.");
        return;
        }
      int isEmpty;
      std::istringstream is(isEmptyValue);
      is >> isEmpty;
      if (isEmpty)
        {
        // Configuration for this button is un-assigned.
        configs << "";
        }
      else
        {
        vtkSMCameraConfigurationFileInfo pvccInfo;
        // Configuration for this button is assigned.
        vtkPVXMLElement *cameraConfig
            = config->FindNestedElementByName(pvccInfo.FileIdentifier);
        if (cameraConfig==0)
          {
          pqErrorMacro(
            << "In " << buttonTagId << " invalid "
            << pvccInfo.FileDescription << ".");
          return;
          }

        // Extract configuration hierarchy from the stream
        // we should validate it but PV state doesn't support this.
        std::ostringstream os;
        cameraConfig->PrintXML(os,vtkIndent());

        configs << os.str().c_str();
        }
      }

    // Pass the newly loaded configuration to the GUI.
    this->setToolTips(toolTips);
    this->setConfigurations(configs);
    //this->accept();
    }
}

//------------------------------------------------------------------------------
void pqCustomViewButtonDialog::exportConfigurations()
{
  pqCustomViewButtonFileInfo fileInfo;

  QString filters
    = QString("%1 (*%2);;All Files (*.*)")
        .arg(fileInfo.FileDescription).arg(fileInfo.FileExtension);

  pqFileDialog dialog(0,this,"Save Custom View Button Configuration","",filters);
  dialog.setFileMode(pqFileDialog::AnyFile);

  if (dialog.exec()==QDialog::Accepted)
    {
    QString filename;
    filename=dialog.getSelectedFiles()[0];

    vtkPVXMLElement *xmlStream=vtkPVXMLElement::New();
    xmlStream->SetName(fileInfo.FileIdentifier);
    xmlStream->SetAttribute("version",fileInfo.WriterVersion);

    for (int i=0; i<this->NButtons; ++i)
      {
      // tool tip
      vtkPVXMLElement *tip=vtkPVXMLElement::New();
      tip->SetName("ToolTip");
      tip->SetAttribute("value",this->ToolTips[i]->text().toStdString().c_str());

      // camera configuration
      std::ostringstream os;
      os << (this->Configurations[i].isEmpty()?1:0);

      vtkPVXMLElement *config=vtkPVXMLElement::New();
      config->SetName("Configuration");
      config->AddAttribute("is_empty",os.str().c_str());

      if (!this->Configurations[i].isEmpty())
        {
        std::string camConfig(this->Configurations[i].toStdString());

        vtkPVXMLParser *parser=vtkPVXMLParser::New();
        parser->InitializeParser();
        parser->ParseChunk(camConfig.c_str(),static_cast<unsigned int>(camConfig.size()));
        parser->CleanupParser();

        vtkPVXMLElement *camConfigXml=parser->GetRootElement();

        config->AddNestedElement(camConfigXml);
        parser->Delete();
        }

      vtkPVXMLElement *button=vtkPVXMLElement::New();
      button->SetName(QString("CustomViewButton%1").arg(i).toStdString().c_str());
      button->AddNestedElement(tip);
      button->AddNestedElement(config);

      xmlStream->AddNestedElement(button);

      tip->Delete();
      config->Delete();
      button->Delete();
      }

    ofstream os(filename.toStdString().c_str(),ios::out);
    xmlStream->PrintXML(os,vtkIndent());
    os << endl;
    os.close();

    xmlStream->Delete();
    }
}

//------------------------------------------------------------------------------
void pqCustomViewButtonDialog::clearAll()
{
  QStringList toolTips;
  toolTips
      << pqCustomViewButtonDialog::DEFAULT_TOOLTIP
      << pqCustomViewButtonDialog::DEFAULT_TOOLTIP
      << pqCustomViewButtonDialog::DEFAULT_TOOLTIP
      << pqCustomViewButtonDialog::DEFAULT_TOOLTIP;
  this->setToolTips(toolTips);

  QStringList configs;
  configs << "" << "" << "" << "";
  this->setConfigurations(configs);
}

//------------------------------------------------------------------------------
void pqCustomViewButtonDialog::assignCurrentView(int id)
{
  this->Configurations[id]=this->CurrentConfiguration;
  if ( this->ToolTips[id]->text() == pqCustomViewButtonDialog::DEFAULT_TOOLTIP )
    {
    this->ToolTips[id]->setText("Current View " + QString::number(id+1));
    }
  this->ToolTips[id]->selectAll();
  this->ToolTips[id]->setFocus();
}