/*
 * boardmodel.cpp - Battleship game plugin
 * Copyright (C) 2014  Aleksey Andreev
 *
 * 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) 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 <https://www.gnu.org/licenses/>.
 *
 */

#include "boardmodel.h"

#define MODEL_ROW_COUNT 2 + 10 + 2
#define MODEL_COL_COUNT 2 + 10 + 3 + 10 + 2

BoardModel::BoardModel(QObject *parent) : QAbstractTableModel(parent), gameModel_(nullptr) { }

BoardModel::~BoardModel() { }

void BoardModel::init(GameModel *gm)
{
    gameModel_ = gm;
    //
    QAbstractTableModel::beginResetModel();
    QAbstractTableModel::endResetModel();
    connect(gameModel_, SIGNAL(myBoardUpdated(int, int, int, int)), this, SLOT(updateMyBoard(int, int, int, int)));
    connect(gameModel_, SIGNAL(oppBoardUpdated(int, int, int, int)), this, SLOT(updateOppBoard(int, int, int, int)));
}

Qt::ItemFlags BoardModel::flags(const QModelIndex &index) const
{
    Qt::ItemFlags fl  = Qt::NoItemFlags | Qt::ItemIsEnabled;
    int           row = index.row();
    if (row < 2 || row >= MODEL_ROW_COUNT - 2)
        return fl;
    int col = index.column();
    if (col < 2 || col >= MODEL_COL_COUNT - 2 || (col > 11 && col < 15))
        return fl;
    return (fl | Qt::ItemIsSelectable);
}
QVariant BoardModel::headerData(int /*section*/, Qt::Orientation /*orientation*/, int /*role*/) const
{
    return QVariant();
}

QVariant BoardModel::data(const QModelIndex & /*index*/, int /*role*/) const { return QVariant(); }

int BoardModel::rowCount(const QModelIndex & /*parent*/) const { return MODEL_ROW_COUNT; }

int BoardModel::columnCount(const QModelIndex & /*parent*/) const { return MODEL_COL_COUNT; }

void BoardModel::updateMyBoard(int x, int y, int width, int height)
{
    QRect  r(x, y, width, height);
    QPoint p1 = myboard2model(r.topLeft());
    QPoint p2 = myboard2model(r.bottomRight());
    emit   dataChanged(index(p1.y(), p1.x()), index(p2.y(), p2.x()));
}

void BoardModel::updateOppBoard(int x, int y, int width, int height)
{
    QRect  r(x, y, width, height);
    QPoint p1 = oppboard2model(r.topLeft());
    QPoint p2 = oppboard2model(r.bottomRight());
    emit   dataChanged(index(p1.y(), p1.x()), index(p2.y(), p2.x()));
}

int BoardModel::model2oppboard(const QPoint &p)
{
    int col = p.x() - 15;
    if (col >= 0 && col < 10) {
        int row = p.y() - 2;
        if (row >= 0 && row < 10)
            return row * 10 + col;
    }
    return -1;
}

int BoardModel::model2myboard(const QPoint &p)
{
    int col = p.x() - 2;
    if (col >= 0 && col < 10) {
        int row = p.y() - 2;
        if (row >= 0 && row < 10)
            return row * 10 + col;
    }
    return -1;
}

QPoint BoardModel::myboard2model(const QPoint &p) const { return QPoint(p.x() + 2, p.y() + 2); }

QPoint BoardModel::oppboard2model(const QPoint &p) const { return QPoint(p.x() + 2 + 10 + 3, p.y() + 2); }
