/* This file is part of Clementine.
   Copyright 2010, David Sansome <me@davidsansome.com>

   Clementine 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.

   Clementine 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 Clementine.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PLAYLISTDELEGATES_H
#define PLAYLISTDELEGATES_H

#include <QCompleter>
#include <QPixmapCache>
#include <QStringListModel>
#include <QStyledItemDelegate>
#include <QTreeView>

#include "library/library.h"
#include "playlist.h"
#include "widgets/ratingwidget.h"

class Player;

class QueuedItemDelegate : public QStyledItemDelegate {
 public:
  QueuedItemDelegate(QObject* parent,
                     int indicator_column = Playlist::Column_Title);
  void paint(QPainter* painter, const QStyleOptionViewItem& option,
             const QModelIndex& index) const;
  void DrawBox(QPainter* painter, const QRect& line_rect, const QFont& font,
               const QString& text, int width = -1, float opacity = 1.0) const;

  int queue_indicator_size(const QModelIndex& index) const;

 private:
  static const int kQueueBoxBorder;
  static const int kQueueBoxCornerRadius;
  static const int kQueueBoxLength;
  static const QRgb kQueueBoxGradientColor1;
  static const QRgb kQueueBoxGradientColor2;
  static const int kQueueOpacitySteps;
  static const float kQueueOpacityLowerBound;

  int indicator_column_;
};

class PlaylistDelegateBase : public QueuedItemDelegate {
  Q_OBJECT
 public:
  PlaylistDelegateBase(QObject* parent, const QString& suffix = QString());
  void paint(QPainter* painter, const QStyleOptionViewItem& option,
             const QModelIndex& index) const;
  QString displayText(const QVariant& value, const QLocale& locale) const;
  QSize sizeHint(const QStyleOptionViewItem& option,
                 const QModelIndex& index) const;

  QStyleOptionViewItem Adjusted(const QStyleOptionViewItem& option,
                                const QModelIndex& index) const;

  static const int kMinHeight;

 public slots:
  bool helpEvent(QHelpEvent* event, QAbstractItemView* view,
                 const QStyleOptionViewItem& option, const QModelIndex& index);

 protected:
  QTreeView* view_;
  QString suffix_;
};

class LengthItemDelegate : public PlaylistDelegateBase {
 public:
  LengthItemDelegate(QObject* parent) : PlaylistDelegateBase(parent) {}
  QString displayText(const QVariant& value, const QLocale& locale) const;
};

class SizeItemDelegate : public PlaylistDelegateBase {
 public:
  SizeItemDelegate(QObject* parent) : PlaylistDelegateBase(parent) {}
  QString displayText(const QVariant& value, const QLocale& locale) const;
};

class DateItemDelegate : public PlaylistDelegateBase {
 public:
  DateItemDelegate(QObject* parent) : PlaylistDelegateBase(parent) {}
  QString displayText(const QVariant& value, const QLocale& locale) const;
};

class LastPlayedItemDelegate : public PlaylistDelegateBase {
 public:
  LastPlayedItemDelegate(QObject* parent) : PlaylistDelegateBase(parent) {}
  QString displayText(const QVariant& value, const QLocale& locale) const;
};

class FileTypeItemDelegate : public PlaylistDelegateBase {
 public:
  FileTypeItemDelegate(QObject* parent) : PlaylistDelegateBase(parent) {}
  QString displayText(const QVariant& value, const QLocale& locale) const;
};

class TextItemDelegate : public PlaylistDelegateBase {
 public:
  TextItemDelegate(QObject* parent) : PlaylistDelegateBase(parent) {}
  QWidget* createEditor(QWidget* parent, const QStyleOptionViewItem& option,
                        const QModelIndex& index) const;
};

class RatingItemDelegate : public PlaylistDelegateBase {
 public:
  RatingItemDelegate(QObject* parent);
  void paint(QPainter* painter, const QStyleOptionViewItem& option,
             const QModelIndex& index) const;
  QSize sizeHint(const QStyleOptionViewItem& option,
                 const QModelIndex& index) const;
  QString displayText(const QVariant& value, const QLocale& locale) const;

  void set_mouse_over(const QModelIndex& index,
                      const QModelIndexList& selected_indexes,
                      const QPoint& pos) {
    mouse_over_index_ = index;
    selected_indexes_ = selected_indexes;
    mouse_over_pos_ = pos;
  }

  void set_mouse_out() { mouse_over_index_ = QModelIndex(); }
  bool is_mouse_over() const { return mouse_over_index_.isValid(); }
  QModelIndex mouse_over_index() const { return mouse_over_index_; }

 private:
  RatingPainter painter_;

  QModelIndex mouse_over_index_;
  QPoint mouse_over_pos_;
  QModelIndexList selected_indexes_;
};

class TagCompletionModel : public QStringListModel {
 public:
  TagCompletionModel(LibraryBackend* backend, Playlist::Column column);

 private:
  static QString database_column(Playlist::Column column);
};

class TagCompleter : public QCompleter {
  Q_OBJECT

 public:
  TagCompleter(LibraryBackend* backend, Playlist::Column column,
               QLineEdit* editor);
  ~TagCompleter();

 private slots:
  void ModelReady(QFuture<TagCompletionModel*> future);

 private:
  QLineEdit* editor_;
};

class TagCompletionItemDelegate : public PlaylistDelegateBase {
 public:
  TagCompletionItemDelegate(QObject* parent, LibraryBackend* backend,
                            Playlist::Column column)
      : PlaylistDelegateBase(parent), backend_(backend), column_(column){};

  QWidget* createEditor(QWidget* parent, const QStyleOptionViewItem& option,
                        const QModelIndex& index) const;

 private:
  LibraryBackend* backend_;
  Playlist::Column column_;
};

class NativeSeparatorsDelegate : public PlaylistDelegateBase {
 public:
  NativeSeparatorsDelegate(QObject* parent) : PlaylistDelegateBase(parent) {}
  QString displayText(const QVariant& value, const QLocale& locale) const;
};

class SongSourceDelegate : public PlaylistDelegateBase {
 public:
  SongSourceDelegate(QObject* parent, Player* player);
  QString displayText(const QVariant& value, const QLocale& locale) const;
  void paint(QPainter* paint, const QStyleOptionViewItem& option,
             const QModelIndex& index) const;

 private:
  QPixmap LookupPixmap(const QUrl& url, const QSize& size) const;

  Player* player_;
  mutable QPixmapCache cache_;
};

#endif  // PLAYLISTDELEGATES_H