// Copyright (c) 2018, ETH Zurich and UNC Chapel Hill.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//
//     * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of
//       its contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Author: Johannes L. Schoenberger (jsch at inf.ethz.ch)

#include "ui/database_management_widget.h"

#include "base/camera_models.h"

namespace colmap {

TwoViewInfoTab::TwoViewInfoTab(QWidget* parent, OptionManager* options,
                               Database* database)
    : QWidget(parent),
      options_(options),
      database_(database),
      matches_viewer_widget_(new FeatureImageViewerWidget(parent, "matches")) {}

void TwoViewInfoTab::Clear() {
  table_widget_->clearContents();
  matches_.clear();
  configs_.clear();
  sorted_matches_idxs_.clear();
}

void TwoViewInfoTab::InitializeTable(const QStringList& table_header) {
  QGridLayout* grid = new QGridLayout(this);

  info_label_ = new QLabel(this);
  grid->addWidget(info_label_, 0, 0);

  QPushButton* show_button = new QPushButton(tr("Show matches"), this);
  connect(show_button, &QPushButton::released, this,
          &TwoViewInfoTab::ShowMatches);
  grid->addWidget(show_button, 0, 1, Qt::AlignRight);

  table_widget_ = new QTableWidget(this);
  table_widget_->setColumnCount(table_header.size());
  table_widget_->setHorizontalHeaderLabels(table_header);

  table_widget_->setShowGrid(true);
  table_widget_->setSelectionBehavior(QAbstractItemView::SelectRows);
  table_widget_->setSelectionMode(QAbstractItemView::SingleSelection);
  table_widget_->setEditTriggers(QAbstractItemView::NoEditTriggers);
  table_widget_->horizontalHeader()->setStretchLastSection(true);
  table_widget_->verticalHeader()->setVisible(false);
  table_widget_->verticalHeader()->setDefaultSectionSize(20);

  grid->addWidget(table_widget_, 1, 0, 1, 2);
}

void TwoViewInfoTab::ShowMatches() {
  QItemSelectionModel* select = table_widget_->selectionModel();

  if (!select->hasSelection()) {
    QMessageBox::critical(this, "", tr("No image pair selected."));
    return;
  }

  if (select->selectedRows().size() > 1) {
    QMessageBox::critical(this, "", tr("Only one image pair may be selected."));
    return;
  }

  const size_t idx =
      sorted_matches_idxs_[select->selectedRows().begin()->row()];
  const auto& selection = matches_[idx];
  const std::string path1 = JoinPaths(*options_->image_path, image_->Name());
  const std::string path2 =
      JoinPaths(*options_->image_path, selection.first->Name());
  const auto keypoints1 = database_->ReadKeypoints(image_->ImageId());
  const auto keypoints2 = database_->ReadKeypoints(selection.first->ImageId());

  matches_viewer_widget_->setWindowTitle(QString::fromStdString(
      "Matches for image pair " + std::to_string(image_->ImageId()) + " - " +
      std::to_string(selection.first->ImageId())));
  matches_viewer_widget_->ReadAndShowWithMatches(path1, path2, keypoints1,
                                                 keypoints2, selection.second);
}

void TwoViewInfoTab::FillTable() {
  // Sort the matched pairs according to number of matches in descending order.
  sorted_matches_idxs_.resize(matches_.size());
  std::iota(sorted_matches_idxs_.begin(), sorted_matches_idxs_.end(), 0);

  std::sort(sorted_matches_idxs_.begin(), sorted_matches_idxs_.end(),
            [&](const size_t idx1, const size_t idx2) {
              return matches_[idx1].second.size() >
                     matches_[idx2].second.size();
            });

  QString info;
  info += QString("Matched images: ") + QString::number(matches_.size());
  info_label_->setText(info);

  table_widget_->clearContents();
  table_widget_->setRowCount(matches_.size());

  for (size_t i = 0; i < sorted_matches_idxs_.size(); ++i) {
    const size_t idx = sorted_matches_idxs_[i];

    QTableWidgetItem* image_id_item =
        new QTableWidgetItem(QString::number(matches_[idx].first->ImageId()));
    table_widget_->setItem(i, 0, image_id_item);

    QTableWidgetItem* num_matches_item =
        new QTableWidgetItem(QString::number(matches_[idx].second.size()));
    table_widget_->setItem(i, 1, num_matches_item);

    // config for inlier matches tab
    if (table_widget_->columnCount() == 3) {
      QTableWidgetItem* config_item =
          new QTableWidgetItem(QString::number(configs_[idx]));
      table_widget_->setItem(i, 2, config_item);
    }
  }

  table_widget_->resizeColumnsToContents();
}

MatchesTab::MatchesTab(QWidget* parent, OptionManager* options,
                       Database* database)
    : TwoViewInfoTab(parent, options, database) {
  QStringList table_header;
  table_header << "image_id"
               << "num_matches";
  InitializeTable(table_header);
}

void MatchesTab::Reload(const std::vector<Image>& images,
                        const image_t image_id) {
  matches_.clear();

  // Find all matched images

  for (const auto& image : images) {
    if (image.ImageId() == image_id) {
      image_ = &image;
      continue;
    }

    if (database_->ExistsMatches(image_id, image.ImageId())) {
      const auto matches = database_->ReadMatches(image_id, image.ImageId());

      if (matches.size() > 0) {
        matches_.emplace_back(&image, matches);
      }
    }
  }

  FillTable();
}

TwoViewGeometriesTab::TwoViewGeometriesTab(QWidget* parent,
                                           OptionManager* options,
                                           Database* database)
    : TwoViewInfoTab(parent, options, database) {
  QStringList table_header;
  table_header << "image_id"
               << "num_matches"
               << "config";
  InitializeTable(table_header);
}

void TwoViewGeometriesTab::Reload(const std::vector<Image>& images,
                                  const image_t image_id) {
  matches_.clear();
  configs_.clear();

  // Find all matched images.

  for (const auto& image : images) {
    if (image.ImageId() == image_id) {
      image_ = &image;
      continue;
    }

    if (database_->ExistsInlierMatches(image_id, image.ImageId())) {
      const auto two_view_geometry =
          database_->ReadTwoViewGeometry(image_id, image.ImageId());

      if (two_view_geometry.inlier_matches.size() > 0) {
        matches_.emplace_back(&image, two_view_geometry.inlier_matches);
        configs_.push_back(two_view_geometry.config);
      }
    }
  }

  FillTable();
}

OverlappingImagesWidget::OverlappingImagesWidget(QWidget* parent,
                                                 OptionManager* options,
                                                 Database* database)
    : parent_(parent), options_(options) {
  // Do not change flag, to make sure feature database is not accessed from
  // multiple threads.
  setWindowFlags(Qt::Window);
  resize(parent->size().width() - 20, parent->size().height() - 20);

  QGridLayout* grid = new QGridLayout(this);

  tab_widget_ = new QTabWidget(this);

  matches_tab_ = new MatchesTab(this, options_, database);
  tab_widget_->addTab(matches_tab_, tr("Matches"));

  two_view_geometries_tab_ = new TwoViewGeometriesTab(this, options_, database);
  tab_widget_->addTab(two_view_geometries_tab_, tr("Two-view geometries"));

  grid->addWidget(tab_widget_, 0, 0);

  QPushButton* close_button = new QPushButton(tr("Close"), this);
  connect(close_button, &QPushButton::released, this,
          &OverlappingImagesWidget::close);
  grid->addWidget(close_button, 1, 0, Qt::AlignRight);
}

void OverlappingImagesWidget::ShowMatches(const std::vector<Image>& images,
                                          const image_t image_id) {
  parent_->setDisabled(true);

  setWindowTitle(
      QString::fromStdString("Matches for image " + std::to_string(image_id)));

  matches_tab_->Reload(images, image_id);
  two_view_geometries_tab_->Reload(images, image_id);
}

void OverlappingImagesWidget::closeEvent(QCloseEvent*) {
  matches_tab_->Clear();
  two_view_geometries_tab_->Clear();
  parent_->setEnabled(true);
}

CameraTab::CameraTab(QWidget* parent, Database* database)
    : QWidget(parent), database_(database) {
  QGridLayout* grid = new QGridLayout(this);

  info_label_ = new QLabel(this);
  grid->addWidget(info_label_, 0, 0);

  QPushButton* add_camera_button = new QPushButton(tr("Add camera"), this);
  connect(add_camera_button, &QPushButton::released, this, &CameraTab::Add);
  grid->addWidget(add_camera_button, 0, 1, Qt::AlignRight);

  QPushButton* set_model_button = new QPushButton(tr("Set model"), this);
  connect(set_model_button, &QPushButton::released, this, &CameraTab::SetModel);
  grid->addWidget(set_model_button, 0, 2, Qt::AlignRight);

  table_widget_ = new QTableWidget(this);
  table_widget_->setColumnCount(6);

  QStringList table_header;
  table_header << "camera_id"
               << "model"
               << "width"
               << "height"
               << "params"
               << "prior_focal_length";
  table_widget_->setHorizontalHeaderLabels(table_header);

  table_widget_->setShowGrid(true);
  table_widget_->setSelectionBehavior(QAbstractItemView::SelectRows);
  table_widget_->horizontalHeader()->setStretchLastSection(true);
  table_widget_->verticalHeader()->setVisible(false);
  table_widget_->verticalHeader()->setDefaultSectionSize(20);

  connect(table_widget_, &QTableWidget::itemChanged, this,
          &CameraTab::itemChanged);

  grid->addWidget(table_widget_, 1, 0, 1, 3);

  grid->setColumnStretch(0, 1);
}

void CameraTab::Reload() {
  QString info;
  info += QString("Cameras: ") + QString::number(database_->NumCameras());
  info_label_->setText(info);

  cameras_ = database_->ReadAllCameras();

  // Make sure, itemChanged is not invoked, while setting up the table.
  table_widget_->blockSignals(true);

  table_widget_->clearContents();
  table_widget_->setRowCount(cameras_.size());

  std::sort(cameras_.begin(), cameras_.end(),
            [](const Camera& camera1, const Camera& camera2) {
              return camera1.CameraId() < camera2.CameraId();
            });

  for (size_t i = 0; i < cameras_.size(); ++i) {
    const Camera& camera = cameras_[i];
    QTableWidgetItem* id_item =
        new QTableWidgetItem(QString::number(camera.CameraId()));
    id_item->setFlags(Qt::ItemIsSelectable);
    table_widget_->setItem(i, 0, id_item);

    QTableWidgetItem* model_item =
        new QTableWidgetItem(QString::fromStdString(camera.ModelName()));
    model_item->setFlags(Qt::ItemIsSelectable);
    table_widget_->setItem(i, 1, model_item);

    table_widget_->setItem(
        i, 2, new QTableWidgetItem(QString::number(camera.Width())));
    table_widget_->setItem(
        i, 3, new QTableWidgetItem(QString::number(camera.Height())));

    table_widget_->setItem(i, 4,
                           new QTableWidgetItem(QString::fromStdString(
                               VectorToCSV(camera.Params()))));
    table_widget_->setItem(
        i, 5,
        new QTableWidgetItem(QString::number(camera.HasPriorFocalLength())));
  }
  table_widget_->resizeColumnsToContents();

  table_widget_->blockSignals(false);
}

void CameraTab::Clear() {
  cameras_.clear();
  table_widget_->clearContents();
}

void CameraTab::itemChanged(QTableWidgetItem* item) {
  Camera& camera = cameras_.at(item->row());
  const std::vector<double> prev_params = camera.Params();

  switch (item->column()) {
    // case 0: never change the camera ID
    // case 1: never change the camera model
    case 2:
      camera.SetWidth(static_cast<size_t>(item->data(Qt::DisplayRole).toInt()));
      break;
    case 3:
      camera.SetHeight(
          static_cast<size_t>(item->data(Qt::DisplayRole).toInt()));
      break;
    case 4:
      if (!camera.SetParamsFromString(item->text().toUtf8().constData())) {
        QMessageBox::critical(this, "", tr("Invalid camera parameters."));
        table_widget_->blockSignals(true);
        item->setText(QString::fromStdString(VectorToCSV(prev_params)));
        table_widget_->blockSignals(false);
      }
      break;
    case 5:
      camera.SetPriorFocalLength(
          static_cast<bool>(item->data(Qt::DisplayRole).toInt()));
      break;
    default:
      break;
  }

  database_->UpdateCamera(camera);
}

void CameraTab::Add() {
  QStringList camera_models;
#define CAMERA_MODEL_CASE(CameraModel) \
  << QString::fromStdString(CameraModelIdToName(CameraModel::model_id))
  camera_models CAMERA_MODEL_CASES;
#undef CAMERA_MODEL_CASE

  bool ok;
  const QString camera_model = QInputDialog::getItem(
      this, "", tr("Model:"), camera_models, 0, false, &ok);
  if (!ok) {
    return;
  }

  // Add new camera to feature database
  Camera camera;
  const double kDefaultFocalLength = 1.0;
  const size_t kDefaultWidth = 1;
  const size_t kDefaultHeight = 1;
  camera.InitializeWithName(camera_model.toUtf8().constData(),
                            kDefaultFocalLength, kDefaultWidth, kDefaultHeight);
  database_->WriteCamera(camera);

  // Reload all cameras
  Reload();

  // Highlight new camera
  table_widget_->selectRow(cameras_.size() - 1);
}

void CameraTab::SetModel() {
  QItemSelectionModel* select = table_widget_->selectionModel();

  if (!select->hasSelection()) {
    QMessageBox::critical(this, "", tr("No camera selected."));
    return;
  }

  QStringList camera_models;
#define CAMERA_MODEL_CASE(CameraModel) \
  << QString::fromStdString(CameraModelIdToName(CameraModel::model_id))
  camera_models CAMERA_MODEL_CASES;
#undef CAMERA_MODEL_CASE

  bool ok;
  const QString camera_model = QInputDialog::getItem(
      this, "", tr("Model:"), camera_models, 0, false, &ok);
  if (!ok) {
    return;
  }

  // Make sure, itemChanged is not invoked, while updating up the table
  table_widget_->blockSignals(true);

  for (QModelIndex& index : select->selectedRows()) {
    std::cout << index.row() << std::endl;
    auto& camera = cameras_.at(index.row());
    camera.InitializeWithName(camera_model.toUtf8().constData(),
                              camera.MeanFocalLength(), camera.Width(),
                              camera.Height());
    database_->UpdateCamera(camera);
  }

  table_widget_->blockSignals(false);

  Reload();
}

ImageTab::ImageTab(QWidget* parent, CameraTab* camera_tab,
                   OptionManager* options, Database* database)
    : QWidget(parent),
      camera_tab_(camera_tab),
      options_(options),
      database_(database) {
  QGridLayout* grid = new QGridLayout(this);

  info_label_ = new QLabel(this);
  grid->addWidget(info_label_, 0, 0);

  QPushButton* set_camera_button = new QPushButton(tr("Set camera"), this);
  connect(set_camera_button, &QPushButton::released, this,
          &ImageTab::SetCamera);
  grid->addWidget(set_camera_button, 0, 1, Qt::AlignRight);

  QPushButton* split_camera_button = new QPushButton(tr("Split camera"), this);
  connect(split_camera_button, &QPushButton::released, this,
          &ImageTab::SplitCamera);
  grid->addWidget(split_camera_button, 0, 2, Qt::AlignRight);

  QPushButton* show_image_button = new QPushButton(tr("Show image"), this);
  connect(show_image_button, &QPushButton::released, this,
          &ImageTab::ShowImage);
  grid->addWidget(show_image_button, 0, 3, Qt::AlignRight);

  QPushButton* overlapping_images_button =
      new QPushButton(tr("Overlapping images"), this);
  connect(overlapping_images_button, &QPushButton::released, this,
          &ImageTab::ShowMatches);
  grid->addWidget(overlapping_images_button, 0, 4, Qt::AlignRight);

  table_widget_ = new QTableWidget(this);
  table_widget_->setColumnCount(10);

  QStringList table_header;
  table_header << "image_id"
               << "name"
               << "camera_id"
               << "qw"
               << "qx"
               << "qy"
               << "qz"
               << "tx"
               << "ty"
               << "tz";
  table_widget_->setHorizontalHeaderLabels(table_header);

  table_widget_->setShowGrid(true);
  table_widget_->setSelectionBehavior(QAbstractItemView::SelectRows);
  table_widget_->horizontalHeader()->setStretchLastSection(true);
  table_widget_->verticalHeader()->setVisible(false);
  table_widget_->verticalHeader()->setDefaultSectionSize(20);

  connect(table_widget_, &QTableWidget::itemChanged, this,
          &ImageTab::itemChanged);

  grid->addWidget(table_widget_, 1, 0, 1, 5);

  grid->setColumnStretch(0, 3);

  image_viewer_widget_ = new FeatureImageViewerWidget(parent, "keypoints");
  overlapping_images_widget_ =
      new OverlappingImagesWidget(parent, options, database_);
}

void ImageTab::Reload() {
  QString info;
  info += QString("Images: ") + QString::number(database_->NumImages());
  info += QString("\n");
  info += QString("Features: ") + QString::number(database_->NumKeypoints());
  info_label_->setText(info);

  images_ = database_->ReadAllImages();

  // Make sure, itemChanged is not invoked, while setting up the table
  table_widget_->blockSignals(true);

  table_widget_->clearContents();
  table_widget_->setRowCount(images_.size());

  for (size_t i = 0; i < images_.size(); ++i) {
    const auto& image = images_[i];
    QTableWidgetItem* id_item =
        new QTableWidgetItem(QString::number(image.ImageId()));
    id_item->setFlags(Qt::ItemIsSelectable);
    table_widget_->setItem(i, 0, id_item);
    table_widget_->setItem(
        i, 1, new QTableWidgetItem(QString::fromStdString(image.Name())));
    table_widget_->setItem(
        i, 2, new QTableWidgetItem(QString::number(image.CameraId())));
    table_widget_->setItem(
        i, 3, new QTableWidgetItem(QString::number(image.QvecPrior(0))));
    table_widget_->setItem(
        i, 4, new QTableWidgetItem(QString::number(image.QvecPrior(1))));
    table_widget_->setItem(
        i, 5, new QTableWidgetItem(QString::number(image.QvecPrior(2))));
    table_widget_->setItem(
        i, 6, new QTableWidgetItem(QString::number(image.QvecPrior(3))));
    table_widget_->setItem(
        i, 7, new QTableWidgetItem(QString::number(image.TvecPrior(0))));
    table_widget_->setItem(
        i, 8, new QTableWidgetItem(QString::number(image.TvecPrior(1))));
    table_widget_->setItem(
        i, 9, new QTableWidgetItem(QString::number(image.TvecPrior(2))));
  }
  table_widget_->resizeColumnsToContents();

  table_widget_->blockSignals(false);
}

void ImageTab::Clear() {
  images_.clear();
  table_widget_->clearContents();
}

void ImageTab::itemChanged(QTableWidgetItem* item) {
  Image& image = images_.at(item->row());
  camera_t camera_id = kInvalidCameraId;

  switch (item->column()) {
    // case 0: never change the image ID
    case 1:
      image.SetName(item->text().toUtf8().constData());
      break;
    case 2:
      camera_id = static_cast<camera_t>(item->data(Qt::DisplayRole).toInt());
      if (!database_->ExistsCamera(camera_id)) {
        QMessageBox::critical(this, "", tr("camera_id does not exist."));
        table_widget_->blockSignals(true);
        item->setText(QString::number(image.CameraId()));
        table_widget_->blockSignals(false);
      } else {
        image.SetCameraId(camera_id);
      }
      break;
    case 3:
      image.QvecPrior(0) = item->data(Qt::DisplayRole).toReal();
      break;
    case 4:
      image.QvecPrior(1) = item->data(Qt::DisplayRole).toReal();
      break;
    case 5:
      image.QvecPrior(2) = item->data(Qt::DisplayRole).toReal();
      break;
    case 6:
      image.QvecPrior(3) = item->data(Qt::DisplayRole).toReal();
      break;
    case 7:
      image.TvecPrior(0) = item->data(Qt::DisplayRole).toReal();
      break;
    case 8:
      image.TvecPrior(1) = item->data(Qt::DisplayRole).toReal();
      break;
    case 9:
      image.TvecPrior(2) = item->data(Qt::DisplayRole).toReal();
      break;
    default:
      break;
  }

  database_->UpdateImage(image);
}

void ImageTab::ShowImage() {
  QItemSelectionModel* select = table_widget_->selectionModel();

  if (!select->hasSelection()) {
    QMessageBox::critical(this, "", tr("No image selected."));
    return;
  }

  if (select->selectedRows().size() > 1) {
    QMessageBox::critical(this, "", tr("Only one image may be selected."));
    return;
  }

  const auto& image = images_[select->selectedRows().begin()->row()];

  const auto keypoints = database_->ReadKeypoints(image.ImageId());
  const std::vector<char> tri_mask(keypoints.size(), false);

  image_viewer_widget_->ReadAndShowWithKeypoints(
      JoinPaths(*options_->image_path, image.Name()), keypoints, tri_mask);
  image_viewer_widget_->setWindowTitle(
      QString::fromStdString("Image " + std::to_string(image.ImageId())));
}

void ImageTab::ShowMatches() {
  QItemSelectionModel* select = table_widget_->selectionModel();

  if (!select->hasSelection()) {
    QMessageBox::critical(this, "", tr("No image selected."));
    return;
  }

  if (select->selectedRows().size() > 1) {
    QMessageBox::critical(this, "", tr("Only one image may be selected."));
    return;
  }

  const auto& image = images_[select->selectedRows().begin()->row()];

  overlapping_images_widget_->ShowMatches(images_, image.ImageId());
  overlapping_images_widget_->show();
  overlapping_images_widget_->raise();
}

void ImageTab::SetCamera() {
  QItemSelectionModel* select = table_widget_->selectionModel();

  if (!select->hasSelection()) {
    QMessageBox::critical(this, "", tr("No image selected."));
    return;
  }

  bool ok;
  const camera_t camera_id = static_cast<camera_t>(
      QInputDialog::getInt(this, "", tr("camera_id"), 0, 0, INT_MAX, 1, &ok));
  if (!ok) {
    return;
  }

  if (!database_->ExistsCamera(camera_id)) {
    QMessageBox::critical(this, "", tr("camera_id does not exist."));
    return;
  }

  // Make sure, itemChanged is not invoked, while updating up the table
  table_widget_->blockSignals(true);

  for (QModelIndex& index : select->selectedRows()) {
    table_widget_->setItem(index.row(), 2,
                           new QTableWidgetItem(QString::number(camera_id)));
    auto& image = images_[index.row()];
    image.SetCameraId(camera_id);
    database_->UpdateImage(image);
  }

  table_widget_->blockSignals(false);
}

void ImageTab::SplitCamera() {
  QItemSelectionModel* select = table_widget_->selectionModel();

  if (!select->hasSelection()) {
    QMessageBox::critical(this, "", tr("No image selected."));
    return;
  }

  bool ok;
  const camera_t camera_id = static_cast<camera_t>(
      QInputDialog::getInt(this, "", tr("camera_id"), 0, 0, INT_MAX, 1, &ok));
  if (!ok) {
    return;
  }

  if (!database_->ExistsCamera(camera_id)) {
    QMessageBox::critical(this, "", tr("camera_id does not exist."));
    return;
  }

  const auto camera = database_->ReadCamera(camera_id);

  // Make sure, itemChanged is not invoked, while updating up the table
  table_widget_->blockSignals(true);

  for (QModelIndex& index : select->selectedRows()) {
    auto& image = images_[index.row()];
    image.SetCameraId(database_->WriteCamera(camera));
    database_->UpdateImage(image);
    table_widget_->setItem(
        index.row(), 2,
        new QTableWidgetItem(QString::number(image.CameraId())));
  }

  table_widget_->blockSignals(false);

  camera_tab_->Reload();
}

DatabaseManagementWidget::DatabaseManagementWidget(QWidget* parent,
                                                   OptionManager* options)
    : parent_(parent), options_(options) {
  setWindowFlags(Qt::Window);
  setWindowTitle("Database management");
  resize(parent->size().width() - 20, parent->size().height() - 20);

  QGridLayout* grid = new QGridLayout(this);

  tab_widget_ = new QTabWidget(this);

  camera_tab_ = new CameraTab(this, &database_);
  image_tab_ = new ImageTab(this, camera_tab_, options_, &database_);

  tab_widget_->addTab(image_tab_, tr("Images"));
  tab_widget_->addTab(camera_tab_, tr("Cameras"));

  grid->addWidget(tab_widget_, 0, 0, 1, 4);

  QPushButton* clear_matches_button =
      new QPushButton(tr("Clear Matches"), this);
  connect(clear_matches_button, &QPushButton::released, this,
          &DatabaseManagementWidget::ClearMatches);
  grid->addWidget(clear_matches_button, 1, 0, Qt::AlignLeft);

  QPushButton* clear_two_view_geometries_button =
      new QPushButton(tr("Clear two-view geometries"), this);
  connect(clear_two_view_geometries_button, &QPushButton::released, this,
          &DatabaseManagementWidget::ClearTwoViewGeometries);
  grid->addWidget(clear_two_view_geometries_button, 1, 1, Qt::AlignLeft);

  grid->setColumnStretch(1, 1);
}

void DatabaseManagementWidget::showEvent(QShowEvent*) {
  parent_->setDisabled(true);

  database_.Open(*options_->database_path);

  image_tab_->Reload();
  camera_tab_->Reload();
}

void DatabaseManagementWidget::hideEvent(QHideEvent*) {
  parent_->setEnabled(true);

  image_tab_->Clear();
  camera_tab_->Clear();

  database_.Close();
}

void DatabaseManagementWidget::ClearMatches() {
  QMessageBox::StandardButton reply = QMessageBox::question(
      this, "", tr("Do you really want to clear all matches?"),
      QMessageBox::Yes | QMessageBox::No);
  if (reply == QMessageBox::No) {
    return;
  }
  database_.ClearMatches();
}

void DatabaseManagementWidget::ClearTwoViewGeometries() {
  QMessageBox::StandardButton reply = QMessageBox::question(
      this, "", tr("Do you really want to clear all two-view geometries?"),
      QMessageBox::Yes | QMessageBox::No);
  if (reply == QMessageBox::No) {
    return;
  }
  database_.ClearTwoViewGeometries();
}

}  // namespace colmap
