/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
 * a source language processor.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
 * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 **********************************************************************/

#pragma once

#include <util/models/mergemodel.h>
#include <interfaces/azoth/iresourceplugin.h>
#include <interfaces/azoth/ichatstyleresourcesource.h>

namespace LC
{
namespace Azoth
{
	template<typename SrcType>
	class SourceTrackingModel : public Util::MergeModel
	{
		QHash<QString, SrcType*> Option2Source_;
		QHash<const QAbstractItemModel*, SrcType*> Model2Source_;
	public:
		using MergeModel::MergeModel;

		void AddSource (SrcType *src)
		{
			QAbstractItemModel *model = src->GetOptionsModel ();
			Model2Source_ [model] = src;
			HandleItems (model, 0, model->rowCount (), true);
			AddModel (model);
		}

		QList<SrcType*> GetAllSources () const
		{
			return Model2Source_.values ();
		}

		SrcType* GetSourceForOption (const QString& opt) const
		{
			return Option2Source_.value (opt);
		}
	protected:
		virtual void handleRowsInserted (const QModelIndex& idx, int from, int to)
		{
			HandleItems (idx.model (), from, to, true);
			MergeModel::handleRowsInserted (idx, from, to);
		}

		virtual void handleRowsAboutToBeRemoved (const QModelIndex& idx, int from, int to)
		{
			HandleItems (idx.model (), from, to, false);
			MergeModel::handleRowsAboutToBeRemoved (idx, from, to);
		}
	private:
		void HandleItems (const QAbstractItemModel *model,
				int from, int to, bool add)
		{
			if (!model)
				model = qobject_cast<QAbstractItemModel*> (sender ());

			SrcType *src = Model2Source_ [model];
			for (int i = from; i <= to; ++i)
			{
				const QString& option = model->index (i, 0).data ().toString ();
				if (option.isEmpty ())
					continue;

				if (add)
					Option2Source_ [option] = src;
				else
					Option2Source_.remove (option);
			}
		}
	};
}
}
