/*
 * Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * 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.
 */

#include "otbQtFileSelectionWidget.h"

#include <otbQtAdapters.h>

namespace otb
{
namespace Wrapper
{

QtFileSelectionWidget::QtFileSelectionWidget() : QWidget(), m_HLayout(NULL), m_Input(NULL), m_Button(NULL), m_Checkbox(NULL), m_IOMode(IO_MODE_INPUT)
{
  this->DoCreateWidget();
}

QtFileSelectionWidget::~QtFileSelectionWidget()
{
}

void QtFileSelectionWidget::SetIOMode(IOMode mode)
{
  m_IOMode = mode;
}

QtFileSelectionWidget::IOMode QtFileSelectionWidget::GetIOMode() const
{
  return m_IOMode;
}

void QtFileSelectionWidget::DoUpdateGUI()
{
}

void QtFileSelectionWidget::DoCreateWidget()
{
  unsigned int sp = 2;
  // Set up input text edit
  m_HLayout = new QHBoxLayout;
  m_HLayout->setSpacing(sp);
  m_HLayout->setContentsMargins(sp, sp, sp, sp);

  m_Checkbox = new QCheckBox();
  m_HLayout->addWidget(m_Checkbox);

  m_Input = new QLineEdit;
  connect(m_Input, &QLineEdit::editingFinished, this, &QtFileSelectionWidget::CallFilenameChanged);
  m_HLayout->addWidget(m_Input);

  // Set up input text edit
  m_Button = new QPushButton;
  m_Button->setText("...");
  m_Button->setToolTip("Select file...");
  m_Button->setFixedWidth(30);

  connect(m_Button, &QPushButton::clicked, this, &QtFileSelectionWidget::SelectFile);
  m_HLayout->addWidget(m_Button);

  this->setLayout(m_HLayout);
}


void QtFileSelectionWidget::SelectFile()
{
  assert(m_Input != NULL);

  QString filename(m_IOMode == IO_MODE_INPUT ? otb::GetOpenFilename(this, QString(), m_Input->text(), tr("All files (*)"), NULL, QFileDialog::ReadOnly)
                                             : otb::GetSaveFilename(this, QString(), m_Input->text(), tr("All files (*)"), NULL));

  if (filename.isEmpty())
    return;

  SetFileName(filename);
}

void QtFileSelectionWidget::CallFilenameChanged()
{
  emit FilenameChanged();
}

void QtFileSelectionWidget::SetFileName(const QString& filename)
{
  m_Input->setText(filename);

  emit FilenameChanged();
}
}
}
