/***************************************************************************
 *   Copyright (C) 2005-2015 by the Quassel Project                        *
 *   devel@quassel-irc.org                                                 *
 *                                                                         *
 *   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 2 of the License, or     *
 *   (at your option) version 3.                                           *
 *                                                                         *
 *   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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/

#include "bufferhotlistfilter.h"

#include "networkmodel.h"


BufferHotListFilter::BufferHotListFilter(QAbstractItemModel *source, QObject *parent)
    : QSortFilterProxyModel(parent)
{
    setSourceModel(source);
    setDynamicSortFilter(true);
    sort(0, Qt::DescendingOrder); // enable sorting... this is "usually" triggered by a enabling setSortingEnabled(true) on a view;
}

BufferId BufferHotListFilter::hottestBuffer()
{
  invalidate();
  sort(0, Qt::DescendingOrder);
  QModelIndex topIndex = index(0,0);
  return data(topIndex, NetworkModel::BufferIdRole).value<BufferId>();
}

bool BufferHotListFilter::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const
{
    Q_ASSERT(sourceModel());
    QModelIndex source_index = sourceModel()->index(source_row, 0, source_parent);

    MsgId firstUnreadMsgId = sourceModel()->data(source_index, NetworkModel::BufferFirstUnreadMsgIdRole).value<MsgId>();
    if (!firstUnreadMsgId.isValid())
        return false;

    // filter out statusbuffers (it's accessable as networkitem)
    BufferInfo::Type bufferType = (BufferInfo::Type)sourceModel()->data(source_index, NetworkModel::BufferTypeRole).toInt();
    if (bufferType == BufferInfo::StatusBuffer) {
        NetworkModel::ItemType itemType = (NetworkModel::ItemType)sourceModel()->data(source_index, NetworkModel::ItemTypeRole).toInt();
        return itemType == NetworkModel::NetworkItemType;
    }

    return true;
}


bool BufferHotListFilter::lessThan(const QModelIndex &source_left, const QModelIndex &source_right) const
{
    int leftActivity = sourceModel()->data(source_left, NetworkModel::BufferActivityRole).toInt();
    int rightActivity = sourceModel()->data(source_right, NetworkModel::BufferActivityRole).toInt();
    if (leftActivity != rightActivity)
        return leftActivity < rightActivity;

    MsgId leftUnreadMsgId = sourceModel()->data(source_left, NetworkModel::BufferFirstUnreadMsgIdRole).value<MsgId>();
    MsgId rightUnreadMsgId = sourceModel()->data(source_right, NetworkModel::BufferFirstUnreadMsgIdRole).value<MsgId>();
    return leftUnreadMsgId > rightUnreadMsgId; // newer messages are treated to be "less"
}


// QVariant BufferHotListFilter::data(const QModelIndex &index, int role) const {
//   QVariant d = QSortFilterProxyModel::data(index, role);

//   if(role == Qt::DisplayRole) {
//     int activity = QSortFilterProxyModel::data(index, NetworkModel::BufferActivityRole).toInt();
//     MsgId unreadMsgId = QSortFilterProxyModel::data(index, NetworkModel::BufferFirstUnreadMsgIdRole).value<MsgId>();
//     return QString("%1 %2 %3").arg(d.toString()).arg(activity).arg(unreadMsgId.toInt());
//   }
//   return d;
// }
