/** \file ThemesManager.h
\brief Define the class to manage and load the themes
\author alpha_one_x86
\version 0.3
\date 2010
\licence GPL3, see the file COPYING */ 

#ifndef THEMES_MANAGER_H
#define THEMES_MANAGER_H

#include <QString>
#include <QObject>
#include <QIcon>
#include <QList>
#include <QPluginLoader>

#include "Environment.h"
#include "ResourcesManager.h"
#include "Singleton.h"
#include "OptionEngine.h"
#include "PluginsManager.h"
#include "LanguagesManager.h"
#include "LocalPluginOptions.h"
#include "FacilityEngine.h"

#include "interface/PluginInterface_Themes.h"

/** \brief Define the class to manage and load the themes

This class provide a core load and manage the themes */
class ThemesManager : public QObject, public Singleton<ThemesManager>
{
	Q_OBJECT
	friend class Singleton<ThemesManager>;
	//public slots:
		/*/// \brief To change the current themes selected
		bool changeCurrentTheme(QString theNewThemeToLoad);*/
	public:
		/** \brief To get image into the current themes, or default if not found
		\param filePath The file path to search, like toto.png resolved with the root of the current themes
		\see currentStylePath */
		QIcon loadIcon(const QString &fileName);
		/** \brief To get if one themes instance
		\see Core() */
		PluginInterface_Themes * getThemesInstance();
	private:
		/// \brief Create the manager and load the defaults variables
		ThemesManager();
		/// \brief Destroy the themes manager
		~ThemesManager();
		/// \brief The default themes path where it has theme's files
		QString defaultStylePath;
		/// \brief The current themes path loaded by ultracopier
		QString currentStylePath;
		/// \brief Store the object of resources manager
		ResourcesManager *resources;
		//for the options
		OptionEngine *options;
		/// \brief Store the object of languages manager
		LanguagesManager *languages;
		/// \brief Store the object of plugin manager
		PluginsManager *plugins;
		/// \brief OptionEngineGroupKey then: Group -> Key
		struct PluginsAvailableThemes
		{
			PluginsAvailable plugin;
			PluginInterface_ThemesFactory *factory;
			QPluginLoader *pluginLoader;
			LocalPluginOptions *options;
		};
		QList<PluginsAvailableThemes> pluginList;
		int currentPluginIndex;
		FacilityEngine facilityEngine;
	signals:
		/// \brief send this signal when the themes have changed
		void theThemeNeedBeUnloaded();
		void theThemeIsReloaded();
		void newThemeOptions(QWidget *,bool isLoaded,bool havePlugin);
	private slots:
		/// \brief reload the themes
		void onePluginAdded(const PluginsAvailable &plugin);
		void onePluginWillBeRemoved(const PluginsAvailable &plugin);
		void allPluginIsLoaded();
		void newOptionValue(const QString &group,const QString &name,const QVariant &value);
		#ifdef ULTRACOPIER_DEBUG
		void debugInformation(DebugLevel level,const QString& fonction,const QString& text,const QString& file,const int& ligne);
		#endif // ULTRACOPIER_DEBUG
};

#endif // THEMES_MANAGER_H