/*
 * Strawberry Music Player
 * This file was part of Clementine.
 * Copyright 2018, Vikram Ambrose <ambroseworks@gmail.com>
 * Copyright 2018, Jonas Kvinge <jonas@jkvinge.net>
 *
 * Strawberry 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.
 *
 * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef FANCYTABWIDGET_H
#define FANCYTABWIDGET_H

#include <QObject>
#include <QTabWidget>
#include <QHash>
#include <QString>
#include <QIcon>
#include <QPixmap>
#include <QSize>
#include <QColor>

class QMenu;
class QActionGroup;
class QContextMenuEvent;
class QPaintEvent;
class QProxyStyle;
class TabData;

class FancyTabWidget : public QTabWidget {
  Q_OBJECT

 public:
  explicit FancyTabWidget(QWidget *parent = nullptr);
  ~FancyTabWidget() override;

  void AddTab(QWidget *widget_view, const QString &name, const QIcon &icon, const QString &label);
  bool EnableTab(QWidget *widget_view);
  bool DisableTab(QWidget *widget_view);
  int insertTab(const int idx, QWidget *page, const QIcon &icon, const QString &label);
  void addBottomWidget(QWidget *widget_view);
  int IndexOfTab(QWidget *widget);

  void setBackgroundPixmap(const QPixmap &pixmap);
  void addSpacer();

  void Load(const QString &kSettingsGroup);
  void SaveSettings(const QString &kSettingsGroup);
  void ReloadSettings();

  //  Values are persisted - only add to the end
  enum class Mode {
    None = 0,
    LargeSidebar,
    SmallSidebar,
    Tabs,
    IconOnlyTabs,
    PlainSidebar
  };

  static const int TabSize_LargeSidebarMinWidth;
  static const int IconSize_LargeSidebar;
  static const int IconSize_SmallSidebar;

  Mode mode() const { return mode_; }
  int iconsize_smallsidebar() const { return iconsize_smallsidebar_; }
  int iconsize_largesidebar() const { return iconsize_largesidebar_; }

 signals:
  void ModeChanged(FancyTabWidget::Mode mode);
  void CurrentChanged(int);

 public slots:
  void setCurrentIndex(int idx);
  void SetMode(FancyTabWidget::Mode mode);
  // Mapper mapped signal needs this convenience function
  void SetMode(int mode) { SetMode(Mode(mode)); }

 private slots:
  void tabBarUpdateGeometry();
  void currentTabChanged(int);

 protected:
  void paintEvent(QPaintEvent*) override;
  void contextMenuEvent(QContextMenuEvent *e) override;

 private:
  void addMenuItem(QActionGroup *group, const QString &text, Mode mode);

  QProxyStyle *style_;
  QPixmap background_pixmap_;
  QMenu *menu_;
  Mode mode_;
  QWidget *bottom_widget_;

  QHash<QWidget*, TabData*> tabs_;

  bool bg_color_system_;
  bool bg_gradient_;
  QColor bg_color_;
  int iconsize_smallsidebar_;
  int iconsize_largesidebar_;

};

#endif  // FANCYTABWIDGET_H