/*
 Copyright (C) 2010-2017 Kristian Duske

 This file is part of TrenchBroom.

 TrenchBroom is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 TrenchBroom is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with TrenchBroom. If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include "NotifierConnection.h"

#include <memory>

#include <QWidget>

class QListWidget;
class QAbstractButton;
class QDragEnterEvent;
class QDropEvent;

namespace TrenchBroom
{
namespace IO
{
class Path;
}

namespace View
{
class MapDocument;

class FileTextureCollectionEditor : public QWidget
{
  Q_OBJECT
private:
  std::weak_ptr<MapDocument> m_document;

  QListWidget* m_collections;

  QAbstractButton* m_addTextureCollectionsButton;
  QAbstractButton* m_removeTextureCollectionsButton;
  QAbstractButton* m_moveTextureCollectionUpButton;
  QAbstractButton* m_moveTextureCollectionDownButton;
  QAbstractButton* m_reloadTextureCollectionsButton;

  NotifierConnection m_notifierConnection;

public:
  explicit FileTextureCollectionEditor(
    std::weak_ptr<MapDocument> document, QWidget* parent = nullptr);

  bool debugUIConsistency() const;
  bool canRemoveTextureCollections() const;
  bool canMoveTextureCollectionsUp() const;
  bool canMoveTextureCollectionsDown() const;
  bool canReloadTextureCollections() const;

  void addTextureCollections();
  void removeSelectedTextureCollections();
  void moveSelectedTextureCollectionsUp();
  void moveSelectedTextureCollectionsDown();
  void reloadTextureCollections();

private:
  void createGui();
private slots:
  void updateButtons();

private:
  void connectObservers();

  void textureCollectionsDidChange();
  void preferenceDidChange(const IO::Path& path);

  void updateControls();

protected:
  void dragEnterEvent(QDragEnterEvent* event) override;
  void dropEvent(QDropEvent* event) override;
};
} // namespace View
} // namespace TrenchBroom
