/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2012  Georg Rudoy
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 **********************************************************************/

#include "pluginmanager.h"
#include <QDir>
#include <QModelIndex>
#include <QtDebug>
#include <qross/core/manager.h>
#include <qross/core/interpreter.h>
#include "wrapperobject.h"
#include "typesfactory.h"
#include "utilproxy.h"
#include "wrappers/entitywrapper.h"

namespace LeechCraft
{
namespace Qrosp
{
	PluginManager::PluginManager ()
	{
		Qross::Manager::self ().registerMetaTypeHandler ("LeechCraft::Entity", EntityHandler);

		const auto& interpreters = Qross::Manager::self ().interpreters ();
		qDebug () << Q_FUNC_INFO
				<< "interpreters:"
				<< interpreters;

		const auto& plugins = FindPlugins ();
		qDebug () << Q_FUNC_INFO
				<< "found"
				<< plugins;

		Qross::Manager::self ().addQObject (new TypesFactory, "TypesFactory");
		Qross::Manager::self ().addQObject (new UtilProxy, "Util");

#ifndef QROSP_NO_QTSCRIPT
		//qScriptRegisterMetaType (Priority, ToScriptValue, FromScriptValue);
#endif

		Q_FOREACH (const auto& type, plugins.keys ())
		{
			if (!interpreters.contains (type))
				continue;
			Q_FOREACH (const auto& path, plugins [type])
				Wrappers_ << new WrapperObject (type, path);
		}
	}

	PluginManager& PluginManager::Instance ()
	{
		static PluginManager pm;
		return pm;
	}

	void PluginManager::Release ()
	{
		Qross::Manager::self ().finalize ();
	}

	QList<QObject*> PluginManager::GetPlugins ()
	{
		return Wrappers_;
	}

	QMap<QString, QStringList> PluginManager::FindPlugins ()
	{
		QMap<QString, QStringList> knownExtensions;
		knownExtensions ["javascript"] << "*.es" << "*.js" << "*.qs";
		knownExtensions ["python"] << "*.py";
		knownExtensions ["ruby"] << "*.rb";

		QMap<QString, QStringList> result;

		struct Collector
		{
			const QStringList& Extensions_;

			Collector (const QStringList& exts)
			: Extensions_ (exts)
			{
			}

			QFileInfoList operator() (const QString& path)
			{
				QFileInfoList list;
				QDir dir = QDir::home ();
				if (dir.cd (path))
					list = dir.entryInfoList (Extensions_,
							QDir::Files |
								QDir::NoDotAndDotDot |
								QDir::Readable,
							QDir::Name);
				return list;
			}
		};

		QDir dir = QDir::home ();
		if (!dir.cd (".leechcraft/plugins/scriptable"))
			qWarning () << Q_FUNC_INFO
					<< "unable to cd into ~/.leechcraft/plugins/scriptable";
		else
			// Iterate over the different types of scripts
			Q_FOREACH (QFileInfo sameType,
					dir.entryInfoList (QDir::Dirs |
							QDir::NoDotAndDotDot |
							QDir::Readable))
			{
				// For the same type iterate over subdirs with
				// actual plugins.
				Q_FOREACH (QFileInfo pluginDir,
						QDir (sameType.absoluteFilePath ()).entryInfoList (QDir::Dirs |
								QDir::NoDotAndDotDot |
								QDir::Readable))
				{
					QString type = sameType.fileName ();
					QStringList exts = knownExtensions.value (type, QStringList ("*.*"));
					QFileInfoList list = Collector (exts) (pluginDir.absoluteFilePath ());
					Q_FOREACH (QFileInfo fileInfo, list)
						if (fileInfo.baseName () == pluginDir.baseName ())
							result [type] += fileInfo.absoluteFilePath ();
				}
			}

		return result;
	}
}
}
