/* This file is (c) 2013 Timon Wong <timon86.wang@gmail.com>
 * Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */

#ifndef __TEXTTOSPEECHSOURCE_HH_INCLUDED__
#define __TEXTTOSPEECHSOURCE_HH_INCLUDED__

#include "ui_texttospeechsource.h"
#include "config.hh"
#include "speechclient.hh"

#include <QComboBox>
#include <QStyledItemDelegate>

/// A model to be projected into the text to speech view, according to Qt's MVC model
class VoiceEnginesModel: public QAbstractItemModel
{
  Q_OBJECT

public:
 enum {
   kColumnEnabled = 0,
   kColumnEngineName,
   kColumnEngineDName,
   kColumnIcon,
   kColumnCount
 };

 VoiceEnginesModel( QWidget * parent, Config::VoiceEngines const & voiceEngines );

 void removeVoiceEngine( int index );
 void addNewVoiceEngine( QString const & engine_name, QLocale locale, QString const & name, QString const & voice_name, int volume, int rate );

 Config::VoiceEngines const & getCurrentVoiceEngines() const { return voiceEngines; }
 void setEngineParams( QModelIndex idx, int volume, int rate );

 QModelIndex index( int row, int column, QModelIndex const & parent ) const override;
 QModelIndex parent( QModelIndex const & parent ) const override;
 Qt::ItemFlags flags( QModelIndex const & index ) const override;
 int rowCount( QModelIndex const & parent ) const override;
 int columnCount( QModelIndex const & parent ) const override;
 QVariant headerData( int section, Qt::Orientation orientation, int role ) const override;
 QVariant data( QModelIndex const & index, int role ) const override;
 bool setData( QModelIndex const & index, const QVariant & value, int role ) override;

private:
 Config::VoiceEngines voiceEngines;
};

class VoiceEngineEditor: public QComboBox
{
  Q_OBJECT

public:
 VoiceEngineEditor( SpeechClient::Engines const & engines, QWidget * parent = nullptr );


 QString engineName() const;
  QString engineId() const;
  void setEngineId( QString const & engineId );
};

class VoiceEngineItemDelegate: public QStyledItemDelegate
{
  Q_OBJECT

 public:
  VoiceEngineItemDelegate( SpeechClient::Engines const & engines, QObject * parent = nullptr );

  QWidget *
  createEditor( QWidget * parent, QStyleOptionViewItem const & option, QModelIndex const & index ) const override;
  virtual void setEditorData( QWidget * uncastedEditor, const QModelIndex & index ) const override;
  virtual void
  setModelData( QWidget * uncastedEditor, QAbstractItemModel * model, const QModelIndex & index ) const override;

 private:
  SpeechClient::Engines engines;
};

class TextToSpeechSource: public QWidget
{
  Q_OBJECT

public:
  TextToSpeechSource( QWidget * parent, Config::VoiceEngines voiceEngines );

  const VoiceEnginesModel & getVoiceEnginesModel() const
  { return voiceEnginesModel; }

private slots:
  void on_addVoiceEngine_clicked();
  void on_removeVoiceEngine_clicked();
  void on_previewVoice_clicked();
  void previewVoiceFinished();
  void slidersChanged();
  void selectionChanged();

private:
  Ui::TextToSpeechSource ui;
  VoiceEnginesModel voiceEnginesModel;

  std::unique_ptr< SpeechClient > speechClient;

  QSet<QString>  occupiedEngines;

  void fitSelectedVoiceEnginesColumns();
  void adjustSliders();
};

#endif // __TEXTTOSPEECHSOURCE_HH_INCLUDED__