#include "MantidQtCustomInterfaces/EnggDiffraction/EnggDiffractionViewQtGUI.h"
#include "MantidKernel/ConfigService.h"
#include "MantidQtAPI/AlgorithmInputHistory.h"
#include "MantidQtAPI/AlgorithmRunner.h"
#include "MantidQtAPI/HelpWindow.h"
#include "MantidQtCustomInterfaces/EnggDiffraction/EnggDiffractionPresenter.h"
#include "MantidQtMantidWidgets/MWRunFiles.h"

#include <Poco/DirectoryIterator.h>
#include <Poco/Path.h>

#include <QCheckBox>
#include <QCloseEvent>
#include <QFileDialog>
#include <QMessageBox>
#include <QSettings>

using namespace Mantid::API;
using namespace MantidQt::CustomInterfaces;

namespace MantidQt {
namespace CustomInterfaces {

// Add this class to the list of specialised dialogs in this namespace
DECLARE_SUBWINDOW(EnggDiffractionViewQtGUI)

const double EnggDiffractionViewQtGUI::g_defaultRebinWidth = -0.0005;

int EnggDiffractionViewQtGUI::m_currentType = 0;
int EnggDiffractionViewQtGUI::m_currentRunMode = 0;
int EnggDiffractionViewQtGUI::m_currentCropCalibBankName = 0;

const std::string EnggDiffractionViewQtGUI::g_iparmExtStr =
    "GSAS instrument parameters, IPARM file: PRM, PAR, IPAR, IPARAM "
    "(*.prm *.par *.ipar *.iparam);;"
    "Other extensions/all files (*.*)";

const std::string EnggDiffractionViewQtGUI::g_pixelCalibExt =
    "Comma separated values text file with calibration table, CSV"
    "(*.csv);;"
    "Nexus file with calibration table: NXS, NEXUS"
    "(*.nxs *.nexus);;"
    "Supported formats: CSV, NXS "
    "(*.csv *.nxs *.nexus);;"
    "Other extensions/all files (*.*)";

const std::string EnggDiffractionViewQtGUI::g_DetGrpExtStr =
    "Detector Grouping File: CSV "
    "(*.csv *.txt);;"
    "Other extensions/all files (*.*)";

const std::string EnggDiffractionViewQtGUI::g_settingsGroup =
    "CustomInterfaces/EnggDiffractionView";

/**
* Default constructor.
*
* @param parent Parent window (most likely the Mantid main app window).
*/
EnggDiffractionViewQtGUI::EnggDiffractionViewQtGUI(QWidget *parent)
    : UserSubWindow(parent), IEnggDiffractionView(), m_currentInst("ENGINX"),
      m_splashMsg(nullptr), m_presenter(nullptr) {}

EnggDiffractionViewQtGUI::~EnggDiffractionViewQtGUI() {}

void EnggDiffractionViewQtGUI::initLayout() {
  // setup container ui
  m_ui.setupUi(this);

  // presenter that knows how to handle a IEnggDiffractionView should
  // take care of all the logic. Note that the view needs to know the
  // concrete presenter
  auto fullPres = boost::make_shared<EnggDiffractionPresenter>(this);
  m_presenter = fullPres;

  // add tab contents and set up their ui's
  QWidget *wCalib = new QWidget(m_ui.tabMain);
  m_uiTabCalib.setupUi(wCalib);
  m_ui.tabMain->addTab(wCalib, QString("Calibration"));

  QWidget *wFocus = new QWidget(m_ui.tabMain);
  m_uiTabFocus.setupUi(wFocus);
  m_ui.tabMain->addTab(wFocus, QString("Focus"));

  QWidget *wPreproc = new QWidget(m_ui.tabMain);
  m_uiTabPreproc.setupUi(wPreproc);
  m_ui.tabMain->addTab(wPreproc, QString("Pre-processing"));

  // This is created from a QWidget* -> use null-deleter to prevent double-free
  // with Qt
  boost::shared_ptr<EnggDiffractionViewQtGUI> sharedView(
      this, [](EnggDiffractionViewQtGUI *) {});
  m_fittingWidget = new EnggDiffFittingViewQtWidget(
      m_ui.tabMain, sharedView, sharedView, fullPres, sharedView);
  m_ui.tabMain->addTab(m_fittingWidget, QString("Fitting"));

  QWidget *wSettings = new QWidget(m_ui.tabMain);
  m_uiTabSettings.setupUi(wSettings);
  m_ui.tabMain->addTab(wSettings, QString("Settings"));

  QComboBox *inst = m_ui.comboBox_instrument;
  m_currentInst = inst->currentText().toStdString();

  setPrefix(m_currentInst);
  // An initial check on the RB number will enable the tabs after all
  // the widgets and connections are set up
  enableTabs(false);

  readSettings();

  // basic UI setup, connect signals, etc.
  doSetupGeneralWidgets();
  doSetupTabCalib();
  doSetupTabFocus();
  doSetupTabPreproc();
  doSetupTabSettings();

  m_presenter->notify(IEnggDiffractionPresenter::Start);
  // Never do this here: if the RB-number checks show a pop-up (splash
  // message), it will be shown very early (before the interface
  // window itself is shown) and that will cause a crash in Qt code on
  // some platforms (windows 10, and 7 sometimes).
  // m_presenter->notify(IEnggDiffractionPresenter::RBNumberChange);
}

void EnggDiffractionViewQtGUI::doSetupTabCalib() {
  // Some recent available runs as defaults. This (as well as the
  // empty defaults just above) should probably be made persistent -
  // and encapsulated into a CalibrationParameters or similar
  // class/structure
  const std::string vanadiumRun = "236516";
  const std::string ceriaRun = "241391";
  if (m_uiTabCalib.MWRunFiles_new_vanadium_num->getUserInput()
          .toString()
          .isEmpty()) {
    m_uiTabCalib.MWRunFiles_new_vanadium_num->setUserInput(
        QString::fromStdString(vanadiumRun));
  }
  if (m_uiTabCalib.MWRunFiles_new_ceria_num->getUserInput()
          .toString()
          .isEmpty()) {
    m_uiTabCalib.MWRunFiles_new_ceria_num->setUserInput(
        QString::fromStdString(ceriaRun));
  }

  // push button signals/slots
  connect(m_uiTabCalib.pushButton_load_calib, SIGNAL(released()), this,
          SLOT(loadCalibrationClicked()));

  connect(m_uiTabCalib.pushButton_new_calib, SIGNAL(released()), this,
          SLOT(calibrateClicked()));

  connect(m_uiTabCalib.pushButton_new_cropped_calib, SIGNAL(released()), this,
          SLOT(CroppedCalibrateClicked()));

  connect(m_uiTabCalib.comboBox_calib_cropped_bank_name,
          SIGNAL(currentIndexChanged(int)), this,
          SLOT(calibspecNoChanged(int)));

  connect(m_uiTabCalib.comboBox_calib_cropped_bank_name,
          SIGNAL(currentIndexChanged(int)), this, SLOT(enableSpecNos()));

  enableCalibrateFocusFitUserActions(true);
}

void EnggDiffractionViewQtGUI::doSetupTabFocus() {

  connect(m_uiTabFocus.pushButton_focus, SIGNAL(released()), this,
          SLOT(focusClicked()));

  connect(m_uiTabFocus.pushButton_focus_cropped, SIGNAL(released()), this,
          SLOT(focusCroppedClicked()));

  connect(m_uiTabFocus.pushButton_texture_browse_grouping_file,
          SIGNAL(released()), this, SLOT(browseTextureDetGroupingFile()));

  connect(m_uiTabFocus.pushButton_focus_texture, SIGNAL(released()), this,
          SLOT(focusTextureClicked()));

  connect(m_uiTabFocus.pushButton_reset, SIGNAL(released()), this,
          SLOT(focusResetClicked()));

  connect(m_uiTabFocus.pushButton_stop_focus, SIGNAL(released()), this,
          SLOT(focusStopClicked()));

  connect(m_uiTabFocus.comboBox_PlotData, SIGNAL(currentIndexChanged(int)),
          this, SLOT(plotRepChanged(int)));

  connect(m_uiTabFocus.comboBox_Multi_Runs, SIGNAL(currentIndexChanged(int)),
          this, SLOT(multiRunModeChanged(int)));

  connect(m_uiTabFocus.checkBox_plot_focused_ws, SIGNAL(clicked()), this,
          SLOT(plotFocusStatus()));
}

void EnggDiffractionViewQtGUI::doSetupTabPreproc() {
  connect(m_uiTabPreproc.pushButton_rebin_time, SIGNAL(released()), this,
          SLOT(rebinTimeClicked()));

  connect(m_uiTabPreproc.pushButton_rebin_multiperiod, SIGNAL(released()), this,
          SLOT(rebinMultiperiodClicked()));
}

void EnggDiffractionViewQtGUI::doSetupTabSettings() {
  // line edits that display paths and the like
  m_uiTabSettings.lineEdit_input_dir_calib->setText(
      QString::fromStdString(m_calibSettings.m_inputDirCalib));
  m_uiTabSettings.lineEdit_input_dir_raw->setText(
      QString::fromStdString(m_calibSettings.m_inputDirRaw));
  m_uiTabSettings.lineEdit_pixel_calib_filename->setText(
      QString::fromStdString(m_calibSettings.m_pixelCalibFilename));
  m_uiTabSettings.lineEdit_template_gsas_prm->setText(
      QString::fromStdString(m_calibSettings.m_templateGSAS_PRM));
  m_calibSettings.m_forceRecalcOverwrite = false;
  m_uiTabSettings.checkBox_force_recalculate_overwrite->setChecked(
      m_calibSettings.m_forceRecalcOverwrite);

  m_uiTabSettings.lineEdit_dir_focusing->setText(
      QString::fromStdString(m_focusDir));

  // push button signals/slots
  connect(m_uiTabSettings.pushButton_browse_input_dir_calib, SIGNAL(released()),
          this, SLOT(browseInputDirCalib()));

  connect(m_uiTabSettings.pushButton_browse_input_dir_raw, SIGNAL(released()),
          this, SLOT(browseInputDirRaw()));

  connect(m_uiTabSettings.pushButton_browse_pixel_calib_filename,
          SIGNAL(released()), this, SLOT(browsePixelCalibFilename()));

  connect(m_uiTabSettings.pushButton_browse_template_gsas_prm,
          SIGNAL(released()), this, SLOT(browseTemplateGSAS_PRM()));

  connect(m_uiTabSettings.pushButton_browse_dir_focusing, SIGNAL(released()),
          this, SLOT(browseDirFocusing()));
}

void EnggDiffractionViewQtGUI::doSetupGeneralWidgets() {
  doSetupSplashMsg();

  // don't show the re-size corner
  m_ui.statusbar->setSizeGripEnabled(false);

  // change instrument
  connect(m_ui.comboBox_instrument, SIGNAL(currentIndexChanged(int)), this,
          SLOT(instrumentChanged(int)));
  connect(m_ui.pushButton_help, SIGNAL(released()), this, SLOT(openHelpWin()));
  // note connection to the parent window, otherwise an empty frame window
  // may remain open and visible after this close
  if (this->parent()) {
    connect(m_ui.pushButton_close, SIGNAL(released()), this->parent(),
            SLOT(close()));
  }

  connect(m_ui.lineEdit_RBNumber, SIGNAL(editingFinished()), this,
          SLOT(RBNumberChanged()));
}

void EnggDiffractionViewQtGUI::doSetupSplashMsg() {
  if (m_splashMsg)
    delete m_splashMsg;

  m_splashMsg = new QMessageBox(this);
  m_splashMsg->setIcon(QMessageBox::Information);
  m_splashMsg->setStandardButtons(QMessageBox::NoButton);
  m_splashMsg->setWindowTitle("Setting up");
  m_splashMsg->setText("Setting up the interface!");
  m_splashMsg->setWindowFlags(Qt::SplashScreen | Qt::FramelessWindowHint |
                              Qt::X11BypassWindowManagerHint);
  m_splashMsg->setWindowModality(Qt::NonModal);
  // we don't want to show now: m_splashMsg->show();
}

void EnggDiffractionViewQtGUI::readSettings() {
  QSettings qs;
  qs.beginGroup(QString::fromStdString(g_settingsGroup));

  m_ui.lineEdit_RBNumber->setText(
      qs.value("user-params-RBNumber", "").toString());

  m_uiTabCalib.lineEdit_current_vanadium_num->setText(
      qs.value("user-params-current-vanadium-num", "").toString());
  m_uiTabCalib.lineEdit_current_ceria_num->setText(
      qs.value("user-params-current-ceria-num", "").toString());
  QString calibFname = qs.value("current-calib-filename", "").toString();
  m_uiTabCalib.lineEdit_current_calib_filename->setText(calibFname);

  m_uiTabCalib.MWRunFiles_new_vanadium_num->setUserInput(
      qs.value("user-params-new-vanadium-num", "").toString());
  m_uiTabCalib.MWRunFiles_new_ceria_num->setUserInput(
      qs.value("user-params-new-ceria-num", "").toString());

  m_uiTabCalib.groupBox_calib_cropped->setChecked(
      qs.value("user-params-calib-cropped-group-checkbox", false).toBool());

  m_uiTabCalib.comboBox_calib_cropped_bank_name->setCurrentIndex(0);

  m_uiTabCalib.lineEdit_cropped_spec_nos->setText(
      qs.value("user-params-calib-cropped-spectrum-nos", "").toString());

  m_uiTabCalib.lineEdit_cropped_customise_bank_name->setText(
      qs.value("user-params-calib-cropped-customise-name", "cropped")
          .toString());

  m_uiTabCalib.checkBox_PlotData_Calib->setChecked(
      qs.value("user-param-calib-plot-data", true).toBool());

  // user params - focusing
  m_uiTabFocus.MWRunFiles_run_num->setUserInput(
      qs.value("user-params-focus-runno", "").toString());

  qs.beginReadArray("user-params-focus-bank_i");
  qs.setArrayIndex(0);
  m_uiTabFocus.checkBox_focus_bank1->setChecked(
      qs.value("value", true).toBool());
  qs.setArrayIndex(1);
  m_uiTabFocus.checkBox_focus_bank2->setChecked(
      qs.value("value", true).toBool());
  qs.endArray();

  m_uiTabFocus.MWRunFiles_cropped_run_num->setUserInput(
      qs.value("user-params-focus-cropped-runno", "").toString());

  m_uiTabFocus.lineEdit_cropped_spec_nos->setText(
      qs.value("user-params-focus-cropped-spectrum-nos", "").toString());

  m_uiTabFocus.MWRunFiles_texture_run_num->setUserInput(
      qs.value("user-params-focus-texture-runno", "").toString());

  m_uiTabFocus.lineEdit_texture_grouping_file->setText(
      qs.value("user-params-focus-texture-detector-grouping-file", "")
          .toString());

  m_uiTabFocus.groupBox_cropped->setChecked(
      qs.value("user-params-focus-cropped-group-checkbox", false).toBool());

  m_uiTabFocus.groupBox_texture->setChecked(
      qs.value("user-params-focus-texture-group-checkbox", false).toBool());

  m_uiTabFocus.checkBox_plot_focused_ws->setChecked(
      qs.value("user-params-focus-plot-focused-ws", true).toBool());

  m_uiTabFocus.checkBox_save_output_files->setChecked(
      qs.value("user-params-focus-save-output-files", true).toBool());

  m_uiTabFocus.comboBox_PlotData->setCurrentIndex(
      qs.value("user-params-focus-plot-type", 0).toInt());

  m_uiTabFocus.comboBox_Multi_Runs->setCurrentIndex(
      qs.value("user-params-multiple-runs-focus-mode", 0).toInt());

  // pre-processing (re-binning)
  m_uiTabPreproc.MWRunFiles_preproc_run_num->setUserInput(
      qs.value("user-params-preproc-runno", "").toString());

  m_uiTabPreproc.doubleSpinBox_time_bin->setValue(
      qs.value("user-params-time-bin", 0.1).toDouble());

  m_uiTabPreproc.spinBox_nperiods->setValue(
      qs.value("user-params-nperiods", 2).toInt());

  m_uiTabPreproc.doubleSpinBox_step_time->setValue(
      qs.value("user-params-step-time", 1).toDouble());

  // settings
  QString lastPath =
      MantidQt::API::AlgorithmInputHistory::Instance().getPreviousDirectory();
  // TODO: as this is growing, it should become << >> operators on
  // EnggDiffCalibSettings
  m_calibSettings.m_inputDirCalib =
      qs.value("input-dir-calib-files", lastPath).toString().toStdString();
  m_calibSettings.m_inputDirRaw =
      qs.value("input-dir-raw-files", lastPath).toString().toStdString();
  const std::string fullCalib = guessDefaultFullCalibrationPath();
  m_calibSettings.m_pixelCalibFilename =
      qs.value("pixel-calib-filename", QString::fromStdString(fullCalib))
          .toString()
          .toStdString();
  // 'advanced' block
  m_calibSettings.m_forceRecalcOverwrite =
      qs.value("force-recalc-overwrite", false).toBool();
  const std::string templ = guessGSASTemplatePath();
  m_calibSettings.m_templateGSAS_PRM =
      qs.value("template-gsas-prm", QString::fromStdString(templ))
          .toString()
          .toStdString();
  m_calibSettings.m_forceRecalcOverwrite =
      qs.value("rebin-calib", g_defaultRebinWidth).toBool();

  // 'focusing' block
  m_focusDir = qs.value("focus-dir").toString().toStdString();

  m_ui.tabMain->setCurrentIndex(qs.value("selected-tab-index").toInt());

  restoreGeometry(qs.value("interface-win-geometry").toByteArray());
  qs.endGroup();
}

void EnggDiffractionViewQtGUI::saveSettings() const {
  QSettings qs;
  qs.beginGroup(QString::fromStdString(g_settingsGroup));

  qs.setValue("user-params-RBNumber", m_ui.lineEdit_RBNumber->text());

  qs.setValue("user-params-current-vanadium-num",
              m_uiTabCalib.lineEdit_current_vanadium_num->text());
  qs.setValue("user-params-current-ceria-num",
              m_uiTabCalib.lineEdit_current_ceria_num->text());
  qs.setValue("current-calib-filename",
              m_uiTabCalib.lineEdit_current_calib_filename->text());

  qs.setValue("user-params-new-vanadium-num",
              m_uiTabCalib.MWRunFiles_new_vanadium_num->getText());
  qs.setValue("user-params-new-ceria-num",
              m_uiTabCalib.MWRunFiles_new_ceria_num->getText());

  qs.setValue("user-params-calib-cropped-group-checkbox",
              m_uiTabCalib.groupBox_calib_cropped->isChecked());

  qs.setValue("user-params-calib-cropped-spectrum-nos",
              m_uiTabCalib.lineEdit_cropped_spec_nos->text());

  qs.setValue("user-params-calib-cropped-customise-name",
              m_uiTabCalib.lineEdit_cropped_customise_bank_name->text());

  qs.setValue("user-param-calib-plot-data",
              m_uiTabCalib.checkBox_PlotData_Calib->isChecked());

  // user params - focusing
  qs.setValue("user-params-focus-runno",
              m_uiTabFocus.MWRunFiles_run_num->getText());

  qs.beginWriteArray("user-params-focus-bank_i");
  qs.setArrayIndex(0);
  qs.setValue("value", m_uiTabFocus.checkBox_focus_bank1->isChecked());
  qs.setArrayIndex(1);
  qs.setValue("value", m_uiTabFocus.checkBox_focus_bank2->isChecked());
  qs.endArray();

  qs.setValue("user-params-focus-cropped-runno",
              m_uiTabFocus.MWRunFiles_cropped_run_num->getText());
  qs.setValue("user-params-focus-cropped-spectrum-nos",
              m_uiTabFocus.lineEdit_cropped_spec_nos->text());

  qs.setValue("user-params-focus-texture-runno",
              m_uiTabFocus.MWRunFiles_texture_run_num->getText());
  qs.setValue("user-params-focus-texture-detector-grouping-file",
              m_uiTabFocus.lineEdit_texture_grouping_file->text());

  qs.setValue("user-params-focus-cropped-group-checkbox",
              m_uiTabFocus.groupBox_cropped->isChecked());

  qs.setValue("user-params-focus-texture-group-checkbox",
              m_uiTabFocus.groupBox_texture->isChecked());

  qs.setValue("user-params-focus-plot-focused-ws",
              m_uiTabFocus.checkBox_plot_focused_ws->isChecked());

  qs.setValue("user-params-focus-save-output-files",
              m_uiTabFocus.checkBox_plot_focused_ws->isChecked());

  qs.setValue("user-params-focus-plot-type",
              m_uiTabFocus.comboBox_PlotData->currentIndex());

  qs.setValue("user-params-multiple-runs-focus-mode",
              m_uiTabFocus.comboBox_Multi_Runs->currentIndex());

  // pre-processing (re-binning)
  qs.setValue("user-params-preproc-runno",
              m_uiTabPreproc.MWRunFiles_preproc_run_num->getText());

  qs.setValue("user-params-time-bin",
              m_uiTabPreproc.doubleSpinBox_time_bin->value());

  qs.setValue("user-params-nperiods", m_uiTabPreproc.spinBox_nperiods->value());

  qs.value("user-params-step-time",
           m_uiTabPreproc.doubleSpinBox_step_time->value());

  // TODO: this should become << >> operators on EnggDiffCalibSettings
  qs.setValue("input-dir-calib-files",
              QString::fromStdString(m_calibSettings.m_inputDirCalib));
  qs.setValue("input-dir-raw-files",
              QString::fromStdString(m_calibSettings.m_inputDirRaw));
  qs.setValue("pixel-calib-filename",
              QString::fromStdString(m_calibSettings.m_pixelCalibFilename));
  // 'advanced' block
  qs.setValue("force-recalc-overwrite", m_calibSettings.m_forceRecalcOverwrite);
  qs.setValue("template-gsas-prm",
              QString::fromStdString(m_calibSettings.m_templateGSAS_PRM));
  qs.setValue("rebin-calib", m_calibSettings.m_rebinCalibrate);

  // 'focusing' block
  qs.setValue("focus-dir", QString::fromStdString(m_focusDir));

  qs.setValue("selected-tab-index", m_ui.tabMain->currentIndex());

  qs.setValue("interface-win-geometry", saveGeometry());
  qs.endGroup();
}

std::string EnggDiffractionViewQtGUI::guessGSASTemplatePath() const {
  // Inside the mantid installation target directory:
  // scripts/Engineering/template_ENGINX_241391_236516_North_and_South_banks.par
  Poco::Path templ =
      Mantid::Kernel::ConfigService::Instance().getInstrumentDirectory();
  templ = templ.makeParent();
  templ.append("scripts");
  templ.append("Engineering");
  templ.append("template_ENGINX_241391_236516_North_and_South_banks.par");
  return templ.toString();
}

std::string EnggDiffractionViewQtGUI::guessDefaultFullCalibrationPath() const {
  // Inside the mantid installation target directory:
  // scripts/Engineering/ENGINX_full_pixel_calibration_vana194547_ceria193749.csv
  Poco::Path templ =
      Mantid::Kernel::ConfigService::Instance().getInstrumentDirectory();
  templ = templ.makeParent();
  templ.append("scripts");
  templ.append("Engineering");
  templ.append("calib");
  templ.append("ENGINX_full_pixel_calibration_vana194547_ceria193749.csv");
  return templ.toString();
}

void EnggDiffractionViewQtGUI::splashMessage(bool visible,
                                             const std::string &shortMsg,
                                             const std::string &description) {
  if (!m_splashMsg)
    return;

  m_splashMsg->setWindowTitle(QString::fromStdString(shortMsg));
  m_splashMsg->setText(QString::fromStdString(description));
  // when showing the message, force it to show up centered
  if (visible) {
    const auto pos = this->mapToGlobal(rect().center());
    m_splashMsg->move(pos.x() - m_splashMsg->width() / 2,
                      pos.y() - m_splashMsg->height() / 2);
  }
  m_splashMsg->setVisible(visible);
}

void EnggDiffractionViewQtGUI::showStatus(const std::string &sts) {
  m_ui.statusbar->showMessage(QString::fromStdString(sts));
}

void EnggDiffractionViewQtGUI::userWarning(const std::string &err,
                                           const std::string &description) {
  QMessageBox::warning(this, QString::fromStdString(err),
                       QString::fromStdString(description), QMessageBox::Ok,
                       QMessageBox::Ok);
}

void EnggDiffractionViewQtGUI::userError(const std::string &err,
                                         const std::string &description) {
  QMessageBox::critical(this, QString::fromStdString(err),
                        QString::fromStdString(description), QMessageBox::Ok,
                        QMessageBox::Ok);
}

std::string EnggDiffractionViewQtGUI::askNewCalibrationFilename(
    const std::string &suggestedFname) {
  // append dir (basename) + filename
  QString prevPath = QString::fromStdString(m_calibSettings.m_inputDirCalib);
  if (prevPath.isEmpty()) {
    prevPath =
        MantidQt::API::AlgorithmInputHistory::Instance().getPreviousDirectory();
  }
  QDir path(prevPath);
  QString suggestion = path.filePath(QString::fromStdString(suggestedFname));
  QString choice = QFileDialog::getSaveFileName(
      this, tr("Please select the name of the calibration file"), suggestion,
      QString::fromStdString(g_iparmExtStr));

  return choice.toStdString();
}

std::string EnggDiffractionViewQtGUI::getRBNumber() const {
  return m_ui.lineEdit_RBNumber->text().toStdString();
}

std::string EnggDiffractionViewQtGUI::currentVanadiumNo() const {
  return m_uiTabCalib.lineEdit_current_vanadium_num->text().toStdString();
}

std::string EnggDiffractionViewQtGUI::currentCeriaNo() const {
  return m_uiTabCalib.lineEdit_current_ceria_num->text().toStdString();
}

std::vector<std::string> EnggDiffractionViewQtGUI::newVanadiumNo() const {
  return qListToVector(m_uiTabCalib.MWRunFiles_new_vanadium_num->getFilenames(),
                       m_uiTabCalib.MWRunFiles_new_vanadium_num->isValid());
}

std::vector<std::string> EnggDiffractionViewQtGUI::newCeriaNo() const {
  return qListToVector(m_uiTabCalib.MWRunFiles_new_ceria_num->getFilenames(),
                       m_uiTabCalib.MWRunFiles_new_ceria_num->isValid());
}

std::string EnggDiffractionViewQtGUI::currentCalibFile() const {
  return m_uiTabCalib.lineEdit_current_calib_filename->text().toStdString();
}

void EnggDiffractionViewQtGUI::newCalibLoaded(const std::string &vanadiumNo,
                                              const std::string &ceriaNo,
                                              const std::string &fname) {

  m_uiTabCalib.lineEdit_current_vanadium_num->setText(
      QString::fromStdString(vanadiumNo));
  m_uiTabCalib.lineEdit_current_ceria_num->setText(
      QString::fromStdString(ceriaNo));
  m_uiTabCalib.lineEdit_current_calib_filename->setText(
      QString::fromStdString(fname));

  if (!fname.empty()) {
    MantidQt::API::AlgorithmInputHistory::Instance().setPreviousDirectory(
        QString::fromStdString(fname));
  }
}

void EnggDiffractionViewQtGUI::enableCalibrateFocusFitUserActions(bool enable) {
  // calibrate
  m_uiTabCalib.groupBox_make_new_calib->setEnabled(enable);
  m_uiTabCalib.groupBox_current_calib->setEnabled(enable);
  m_uiTabCalib.groupBox_calib_cropped->setEnabled(enable);
  m_uiTabCalib.pushButton_new_cropped_calib->setEnabled(enable);
  m_ui.pushButton_close->setEnabled(enable);
  m_uiTabCalib.checkBox_PlotData_Calib->setEnabled(enable);

  // focus
  m_uiTabFocus.MWRunFiles_run_num->setEnabled(enable);
  m_uiTabFocus.pushButton_focus->setEnabled(enable);

  m_uiTabFocus.groupBox_cropped->setEnabled(enable);
  m_uiTabFocus.groupBox_texture->setEnabled(enable);
  m_uiTabFocus.groupBox_focus_output_options->setEnabled(enable);

  m_uiTabFocus.pushButton_stop_focus->setDisabled(enable);
  m_uiTabFocus.pushButton_reset->setEnabled(enable);

  // pre-processing
  m_uiTabPreproc.MWRunFiles_preproc_run_num->setEnabled(enable);
  m_uiTabPreproc.pushButton_rebin_time->setEnabled(enable);
  m_uiTabPreproc.pushButton_rebin_multiperiod->setEnabled(enable);

  // fitting
  m_fittingWidget->enable(enable);
}

void EnggDiffractionViewQtGUI::enableTabs(bool enable) {
  for (int ti = 0; ti < m_ui.tabMain->count(); ++ti) {
    m_ui.tabMain->setTabEnabled(ti, enable);
  }
}

std::vector<std::string> EnggDiffractionViewQtGUI::currentPreprocRunNo() const {
  return qListToVector(
      m_uiTabPreproc.MWRunFiles_preproc_run_num->getFilenames(),
      m_uiTabPreproc.MWRunFiles_preproc_run_num->isValid());
}

double EnggDiffractionViewQtGUI::rebinningTimeBin() const {
  return m_uiTabPreproc.doubleSpinBox_time_bin->value();
}

size_t EnggDiffractionViewQtGUI::rebinningPulsesNumberPeriods() const {
  return m_uiTabPreproc.spinBox_nperiods->value();
}

double EnggDiffractionViewQtGUI::rebinningPulsesTime() const {
  return m_uiTabPreproc.doubleSpinBox_step_time->value();
}

void EnggDiffractionViewQtGUI::plotFocusedSpectrum(const std::string &wsName) {
  std::string pyCode =
      "win=plotSpectrum('" + wsName + "', 0, error_bars=False, type=0)";

  std::string status =
      runPythonCode(QString::fromStdString(pyCode), false).toStdString();
  m_logMsgs.emplace_back("Plotted output focused data, with status string " +
                         status);
  m_presenter->notify(IEnggDiffractionPresenter::LogMsg);
}

void EnggDiffractionViewQtGUI::plotWaterfallSpectrum(
    const std::string &wsName) {
  // parameter of list ?
  std::string pyCode =
      "plotSpectrum('" + wsName +
      "', 0, error_bars=False, type=0, waterfall=True, window=win)";
  std::string status =
      runPythonCode(QString::fromStdString(pyCode), false).toStdString();
  m_logMsgs.emplace_back("Plotted output focused data, with status string " +
                         status);
  m_presenter->notify(IEnggDiffractionPresenter::LogMsg);
}

void EnggDiffractionViewQtGUI::plotReplacingWindow(const std::string &wsName,
                                                   const std::string &spectrum,
                                                   const std::string &type) {
  std::string pyCode = "win=plotSpectrum('" + wsName + "', " + spectrum +
                       ", error_bars=False, type=" + type +
                       ", window=win, clearWindow=True)";
  std::string status =
      runPythonCode(QString::fromStdString(pyCode), false).toStdString();

  m_logMsgs.emplace_back("Plotted output focused data, with status string " +
                         status);
  m_presenter->notify(IEnggDiffractionPresenter::LogMsg);
}

void EnggDiffractionViewQtGUI::plotCalibOutput(const std::string &pyCode) {

  std::string status =
      runPythonCode(QString::fromStdString(pyCode), false).toStdString();

  m_logMsgs.push_back(
      "Plotted output calibration vanadium curves, with status string " +
      status);
  m_presenter->notify(IEnggDiffractionPresenter::LogMsg);
}

void EnggDiffractionViewQtGUI::resetFocus() {
  m_uiTabFocus.MWRunFiles_run_num->setUserInput("");
  m_uiTabFocus.checkBox_focus_bank1->setChecked(true);
  m_uiTabFocus.checkBox_focus_bank2->setChecked(true);

  m_uiTabFocus.MWRunFiles_cropped_run_num->setUserInput("");
  m_uiTabFocus.lineEdit_cropped_spec_nos->setText("");

  m_uiTabFocus.groupBox_cropped->setChecked(false);
  m_uiTabFocus.groupBox_texture->setChecked(false);

  m_uiTabFocus.MWRunFiles_run_num->setUserInput("");
  m_uiTabFocus.lineEdit_texture_grouping_file->setText("");
}

std::string
EnggDiffractionViewQtGUI::enggRunPythonCode(const std::string &pyCode) {
  std::string status =
      runPythonCode(QString::fromStdString(pyCode), false).toStdString();

  return status;
}

std::string EnggDiffractionViewQtGUI::askExistingCalibFilename() {
  QString prevPath = QString::fromStdString(m_calibSettings.m_inputDirCalib);
  if (prevPath.isEmpty()) {
    QString prevPath =
        MantidQt::API::AlgorithmInputHistory::Instance().getPreviousDirectory();
  }

  QString filename =
      QFileDialog::getOpenFileName(this, tr("Open calibration file"), prevPath,
                                   QString::fromStdString(g_iparmExtStr));

  if (!filename.isEmpty()) {
    MantidQt::API::AlgorithmInputHistory::Instance().setPreviousDirectory(
        filename);
  }

  return filename.toStdString();
}

void EnggDiffractionViewQtGUI::loadCalibrationClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::LoadExistingCalib);
}

void EnggDiffractionViewQtGUI::calibrateClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::CalcCalib);
}

void EnggDiffractionViewQtGUI::CroppedCalibrateClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::CropCalib);
}

void EnggDiffractionViewQtGUI::focusClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::FocusRun);
}

void EnggDiffractionViewQtGUI::focusCroppedClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::FocusCropped);
}

void EnggDiffractionViewQtGUI::focusTextureClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::FocusTexture);
}

void EnggDiffractionViewQtGUI::focusResetClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::ResetFocus);
}

void EnggDiffractionViewQtGUI::focusStopClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::StopFocus);
}

void EnggDiffractionViewQtGUI::rebinTimeClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::RebinTime);
}

void EnggDiffractionViewQtGUI::rebinMultiperiodClicked() {
  m_presenter->notify(IEnggDiffractionPresenter::RebinMultiperiod);
}

void EnggDiffractionViewQtGUI::browseInputDirCalib() {
  QString prevPath = QString::fromStdString(m_calibSettings.m_inputDirCalib);
  if (prevPath.isEmpty()) {
    prevPath =
        MantidQt::API::AlgorithmInputHistory::Instance().getPreviousDirectory();
  }
  QString dir = QFileDialog::getExistingDirectory(
      this, tr("Open Directory"), prevPath,
      QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);

  if (dir.isEmpty()) {
    return;
  }

  MantidQt::API::AlgorithmInputHistory::Instance().setPreviousDirectory(dir);
  m_calibSettings.m_inputDirCalib = dir.toStdString();
  m_uiTabSettings.lineEdit_input_dir_calib->setText(
      QString::fromStdString(m_calibSettings.m_inputDirCalib));
}

void EnggDiffractionViewQtGUI::browseInputDirRaw() {
  QString prevPath = QString::fromStdString(m_calibSettings.m_inputDirRaw);
  if (prevPath.isEmpty()) {
    prevPath =
        MantidQt::API::AlgorithmInputHistory::Instance().getPreviousDirectory();
  }
  QString dir = QFileDialog::getExistingDirectory(
      this, tr("Open Directory"), prevPath,
      QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);

  if (dir.isEmpty()) {
    return;
  }

  MantidQt::API::AlgorithmInputHistory::Instance().setPreviousDirectory(dir);
  m_calibSettings.m_inputDirRaw = dir.toStdString();
  m_uiTabSettings.lineEdit_input_dir_raw->setText(
      QString::fromStdString(m_calibSettings.m_inputDirRaw));
}

void EnggDiffractionViewQtGUI::browsePixelCalibFilename() {
  QString prevPath = QString::fromStdString(m_calibSettings.m_inputDirCalib);
  if (prevPath.isEmpty()) {
    QString prevPath =
        MantidQt::API::AlgorithmInputHistory::Instance().getPreviousDirectory();
  }

  QString filename = QFileDialog::getOpenFileName(
      this, tr("Open pixel calibration (full calibration) file"), prevPath,
      QString::fromStdString(g_pixelCalibExt));

  if (filename.isEmpty()) {
    return;
  }

  m_calibSettings.m_pixelCalibFilename = filename.toStdString();
  m_uiTabSettings.lineEdit_pixel_calib_filename->setText(
      QString::fromStdString(m_calibSettings.m_pixelCalibFilename));
}

void EnggDiffractionViewQtGUI::browseTemplateGSAS_PRM() {

  QString prevPath = QString::fromStdString(m_calibSettings.m_templateGSAS_PRM);
  QString path(QFileDialog::getOpenFileName(
      this, tr("Open GSAS IPAR template file"), prevPath,
      QString::fromStdString(g_iparmExtStr)));

  if (path.isEmpty()) {
    return;
  }

  m_calibSettings.m_templateGSAS_PRM = path.toStdString();
  m_uiTabSettings.lineEdit_template_gsas_prm->setText(
      QString::fromStdString(m_calibSettings.m_templateGSAS_PRM));
}

void EnggDiffractionViewQtGUI::browseDirFocusing() {
  QString prevPath = QString::fromStdString(m_focusDir);
  if (prevPath.isEmpty()) {
    prevPath =
        MantidQt::API::AlgorithmInputHistory::Instance().getPreviousDirectory();
  }
  QString dir = QFileDialog::getExistingDirectory(
      this, tr("Open Directory"), prevPath,
      QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);

  if (dir.isEmpty()) {
    return;
  }

  MantidQt::API::AlgorithmInputHistory::Instance().setPreviousDirectory(dir);
  m_focusDir = dir.toStdString();
  m_uiTabSettings.lineEdit_dir_focusing->setText(dir);
}

void EnggDiffractionViewQtGUI::browseTextureDetGroupingFile() {
  QString prevPath = QString::fromStdString(m_calibSettings.m_inputDirRaw);
  if (prevPath.isEmpty()) {
    prevPath =
        MantidQt::API::AlgorithmInputHistory::Instance().getPreviousDirectory();
  }

  QString path(QFileDialog::getOpenFileName(
      this, tr("Open detector grouping file"), prevPath,
      QString::fromStdString(g_DetGrpExtStr)));

  if (path.isEmpty()) {
    return;
  }

  MantidQt::API::AlgorithmInputHistory::Instance().setPreviousDirectory(path);
  m_uiTabFocus.lineEdit_texture_grouping_file->setText(path);
}

std::vector<std::string> EnggDiffractionViewQtGUI::focusingRunNo() const {
  return qListToVector(m_uiTabFocus.MWRunFiles_run_num->getFilenames(),
                       m_uiTabFocus.MWRunFiles_run_num->isValid());
}

std::vector<std::string>
EnggDiffractionViewQtGUI::focusingCroppedRunNo() const {
  return qListToVector(m_uiTabFocus.MWRunFiles_cropped_run_num->getFilenames(),
                       m_uiTabFocus.MWRunFiles_cropped_run_num->isValid());
}

std::vector<std::string>
EnggDiffractionViewQtGUI::focusingTextureRunNo() const {
  return qListToVector(m_uiTabFocus.MWRunFiles_texture_run_num->getFilenames(),
                       m_uiTabFocus.MWRunFiles_texture_run_num->isValid());
}

std::vector<std::string>
EnggDiffractionViewQtGUI::qListToVector(QStringList list,
                                        bool validator) const {
  std::vector<std::string> vec;
  if (validator) {
    foreach (const QString &str, list) { vec.push_back(str.toStdString()); }
  }

  return vec;
}

std::string EnggDiffractionViewQtGUI::focusingDir() const {
  return m_uiTabSettings.lineEdit_dir_focusing->text().toStdString();
}

std::vector<bool> EnggDiffractionViewQtGUI::focusingBanks() const {
  std::vector<bool> res;
  res.push_back(m_uiTabFocus.checkBox_focus_bank1->isChecked());
  res.push_back(m_uiTabFocus.checkBox_focus_bank2->isChecked());
  return res;
}

std::string EnggDiffractionViewQtGUI::focusingCroppedSpectrumNos() const {
  return m_uiTabFocus.lineEdit_cropped_spec_nos->text().toStdString();
}

std::string EnggDiffractionViewQtGUI::focusingTextureGroupingFile() const {
  return m_uiTabFocus.lineEdit_texture_grouping_file->text().toStdString();
}

bool EnggDiffractionViewQtGUI::focusedOutWorkspace() const {
  return m_uiTabFocus.checkBox_plot_focused_ws->checkState();
}

bool EnggDiffractionViewQtGUI::plotCalibWorkspace() const {
  return m_uiTabCalib.checkBox_PlotData_Calib->checkState();
}

bool EnggDiffractionViewQtGUI::saveFocusedOutputFiles() const {
  return m_uiTabFocus.checkBox_save_output_files->checkState();
}

void EnggDiffractionViewQtGUI::plotFocusStatus() {
  if (focusedOutWorkspace()) {
    m_uiTabFocus.comboBox_PlotData->setEnabled(true);
  } else {
    m_uiTabFocus.comboBox_PlotData->setEnabled(false);
  }
}

void EnggDiffractionViewQtGUI::calibspecNoChanged(int /*idx*/) {
  QComboBox *BankName = m_uiTabCalib.comboBox_calib_cropped_bank_name;
  if (!BankName)
    return;
  m_currentCropCalibBankName = BankName->currentIndex();
}

void EnggDiffractionViewQtGUI::enableSpecNos() {
  if (m_currentCropCalibBankName == 0) {
    m_uiTabCalib.lineEdit_cropped_spec_nos->setEnabled(true);
    m_uiTabCalib.lineEdit_cropped_customise_bank_name->setEnabled(true);
  } else {
    m_uiTabCalib.lineEdit_cropped_spec_nos->setDisabled(true);
    m_uiTabCalib.lineEdit_cropped_customise_bank_name->setDisabled(true);
  }
}

std::string EnggDiffractionViewQtGUI::currentCalibSpecNos() const {
  return m_uiTabCalib.lineEdit_cropped_spec_nos->text().toStdString();
}

std::string EnggDiffractionViewQtGUI::currentCalibCustomisedBankName() const {
  return m_uiTabCalib.lineEdit_cropped_customise_bank_name->text()
      .toStdString();
}

void EnggDiffractionViewQtGUI::multiRunModeChanged(int /*idx*/) {
  QComboBox *plotType = m_uiTabFocus.comboBox_Multi_Runs;
  if (!plotType)
    return;
  m_currentRunMode = plotType->currentIndex();
}

void EnggDiffractionViewQtGUI::plotRepChanged(int /*idx*/) {
  QComboBox *plotType = m_uiTabFocus.comboBox_PlotData;
  if (!plotType)
    return;
  m_currentType = plotType->currentIndex();
}

void EnggDiffractionViewQtGUI::instrumentChanged(int /*idx*/) {
  QComboBox *inst = m_ui.comboBox_instrument;
  if (!inst)
    return;
  m_currentInst = inst->currentText().toStdString();
  m_presenter->notify(IEnggDiffractionPresenter::InstrumentChange);
}

void EnggDiffractionViewQtGUI::RBNumberChanged() {
  m_presenter->notify(IEnggDiffractionPresenter::RBNumberChange);
}

void EnggDiffractionViewQtGUI::userSelectInstrument(const QString &prefix) {
  // Set file browsing to current instrument
  setPrefix(prefix.toStdString());
}

void EnggDiffractionViewQtGUI::setPrefix(std::string prefix) {
  QString prefixInput = QString::fromStdString(prefix);
  // focus tab
  m_uiTabFocus.MWRunFiles_run_num->setInstrumentOverride(prefixInput);
  m_uiTabFocus.MWRunFiles_texture_run_num->setInstrumentOverride(prefixInput);

  // calibration tab
  m_uiTabCalib.MWRunFiles_new_ceria_num->setInstrumentOverride(prefixInput);
  m_uiTabCalib.MWRunFiles_new_vanadium_num->setInstrumentOverride(prefixInput);

  // rebin tab
  m_uiTabPreproc.MWRunFiles_preproc_run_num->setInstrumentOverride(prefixInput);
}

void EnggDiffractionViewQtGUI::showEvent(QShowEvent *) {
  // make sure that the RB number is checked on interface startup/show
  m_presenter->notify(IEnggDiffractionPresenter::RBNumberChange);
}

void EnggDiffractionViewQtGUI::closeEvent(QCloseEvent *event) {
  int answer = QMessageBox::AcceptRole;

  QMessageBox msgBox;
  if (false /* TODO: get this from user settings if eventually used */) {
    msgBox.setWindowTitle("Close the engineering diffraction interface");
    // with something like this, we'd have layout issues:
    // msgBox.setStandardButtons(QMessageBox::No | QMessageBox::Yes);
    // msgBox.setDefaultButton(QMessageBox::Yes);
    msgBox.setIconPixmap(QPixmap(":/win/unknown.png"));
    QCheckBox confirmCheckBox("Always ask for confirmation", &msgBox);
    confirmCheckBox.setCheckState(Qt::Checked);
    msgBox.layout()->addItem(new QSpacerItem(0, 0, QSizePolicy::Expanding));
    msgBox.layout()->addWidget(&confirmCheckBox);
    QPushButton *bYes = msgBox.addButton("Yes", QMessageBox::YesRole);
    bYes->setIcon(style()->standardIcon(QStyle::SP_DialogYesButton));
    QPushButton *bNo = msgBox.addButton("No", QMessageBox::NoRole);
    bNo->setIcon(style()->standardIcon(QStyle::SP_DialogNoButton));
    msgBox.setDefaultButton(bNo);
    msgBox.setText("You are about to close this interface");
    msgBox.setInformativeText("Are you sure?");
    answer = msgBox.exec();
  }

  if (answer == QMessageBox::AcceptRole && m_ui.pushButton_close->isEnabled()) {
    m_presenter->notify(IEnggDiffractionPresenter::ShutDown);
    delete m_splashMsg;
    event->accept();
  } else {
    event->ignore();
  }
}

void EnggDiffractionViewQtGUI::openHelpWin() {
  MantidQt::API::HelpWindow::showCustomInterface(
      nullptr, QString("Engineering_Diffraction"));
}

} // namespace CustomInterfaces
} // namespace MantidQt