/*
 * Hedgewars, a free turn based strategy game
 * Copyright (c) 2004-2014 Andrey Korotaev <unC0Rr@gmail.com>
 *
 * 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; version 2 of the License
 *
 * 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 St, Fifth Floor, Boston, MA  02110-1301  USA
 */

/**
 * @file
 * @brief RoomsListModel class implementation
 */

#include <QBrush>
#include <QColor>
#include <QIcon>

#include "roomslistmodel.h"
#include "MapModel.h"

RoomsListModel::RoomsListModel(QObject *parent) :
    QAbstractTableModel(parent),
    c_nColumns(9)
{
    m_headerData =
    QStringList()
     << tr("In progress")
     << tr("Room Name")
     << tr("C")
     << tr("T")
     << tr("Owner")
     << tr("Map")
     << tr("Script")
     << tr("Rules")
     << tr("Weapons");

    m_staticMapModel = DataManager::instance().staticMapModel();
    m_missionMapModel = DataManager::instance().missionMapModel();
}


QVariant RoomsListModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if(orientation == Qt::Vertical || role != Qt::DisplayRole)
        return QVariant();
    else
        return QVariant(m_headerData.at(section));
}


int RoomsListModel::rowCount(const QModelIndex & parent) const
{
    if(parent.isValid())
        return 0;
    else
        return m_data.size();
}


int RoomsListModel::columnCount(const QModelIndex & parent) const
{
    if(parent.isValid())
        return 0;
    else
        return c_nColumns;
}


QVariant RoomsListModel::data(const QModelIndex &index, int role) const
{
    int column = index.column();
    int row = index.row();

    // invalid index
    if (!index.isValid())
        return QVariant();

    // invalid row
    if ((row < 0) || (row >= m_data.size()))
        return QVariant();

    // invalid column
    if ((column < 0) || (column >= c_nColumns))
        return QVariant();

    // not a role we have data for
    if (role != Qt::DisplayRole)
        // only custom-align counters
        if ((role != Qt::TextAlignmentRole)
            || ((column != PlayerCountColumn) && (column != TeamCountColumn)))
                // only decorate name column
                if ((role != Qt::DecorationRole) || (column != NameColumn))
                    // only dye map column
                    if ((role != Qt::ForegroundRole) || (column != MapColumn))
                        return QVariant();

    // decorate room name based on room state
    if (role == Qt::DecorationRole)
    {
        const QIcon roomBusyIcon(":/res/iconDamage.png");
        const QIcon roomWaitingIcon(":/res/iconTime.png");

        if (m_data.at(row).at(0).isEmpty())
            return QVariant(roomWaitingIcon);
        else
            return QVariant(roomBusyIcon);
    }

    QString content = m_data.at(row).at(column);

    if (role == Qt::DisplayRole)
    {
        // supply in progress flag as bool
        if (column == 0)
            return QVariant(QString(!content.isEmpty()));

        // display room names
        if (column == 5)
        {
            // special names
            if (content[0] == '+')
            {
                if (content == "+rnd+") return tr("Random Map");
                if (content == "+maze+") return tr("Random Maze");
                if (content == "+perlin+") return tr("Random Perlin");
                if (content == "+drawn+") return tr("Hand-drawn");
            }

            // prefix ? if map not available
            if (!m_staticMapModel->mapExists(content) &&
                !m_missionMapModel->mapExists(content))
                return QString ("? %1").arg(content);
        }

        return content;
    }

    // dye map names red if map not available
    if (role == Qt::ForegroundRole)
    {
        if (content == "+rnd+" ||
            content == "+maze+" ||
            content == "+perlin+" ||
            content == "+drawn+" ||
            m_staticMapModel->mapExists(content) ||
            m_missionMapModel->mapExists(content))
            return QVariant();
        else
            return QBrush(QColor("darkred"));
    }

    if (role == Qt::TextAlignmentRole)
    {
        return (int)(Qt::AlignHCenter | Qt::AlignVCenter);
    }

    Q_ASSERT(false);
    return QVariant();
}


void RoomsListModel::setRoomsList(const QStringList & rooms)
{
    beginResetModel();

    m_data.clear();

    int nRooms = rooms.size();

    for (int i = 0; i < nRooms; i += c_nColumns)
    {
        QStringList l;

#if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
        l.reserve(c_nColumns);  // small optimisation not supported in old Qt
#endif

        for (int t = 0; t < c_nColumns; t++)
        {
            l.append(rooms[i + t]);
        }

        m_data.append(roomInfo2RoomRecord(l));
    }

    endResetModel();
}


void RoomsListModel::addRoom(const QStringList & info)
{
    beginInsertRows(QModelIndex(), 0, 0);

    m_data.prepend(roomInfo2RoomRecord(info));

    endInsertRows();
}


int RoomsListModel::rowOfRoom(const QString & name)
{
    int size = m_data.size();

    if (size < 1)
        return -1;

    int i = 0;

    // search for record with matching room name
    while(m_data[i].at(NameColumn) != name)
    {
        i++;
        if(i >= size)
            return -1;
    }

    return i;
}


void RoomsListModel::removeRoom(const QString & name)
{
    int i = rowOfRoom(name);

    if (i < 0)
        return;

    beginRemoveRows(QModelIndex(), i, i);

    m_data.removeAt(i);

    endRemoveRows();
}


void RoomsListModel::updateRoom(const QString & name, const QStringList & info)
{
    int i = rowOfRoom(name);

    if (i < 0)
        return;

    m_data[i] = roomInfo2RoomRecord(info);

    emit dataChanged(index(i, 0), index(i, columnCount(QModelIndex()) - 1));
}


QStringList RoomsListModel::roomInfo2RoomRecord(const QStringList & info)
{
    QStringList result;

    result = info;

    QString flags = info[StateColumn];
    // for matters of less memory usage and quicker access store
    // the boolean string as either "t" or empty
    if (flags.contains('g'))
        result[StateColumn] = "t";
    else
        result[StateColumn] = QString();

    return result;
}