/*****************************************************************************
 * Eliot
 * Copyright (C) 2009-2012 Olivier Teulière
 * Authors: Olivier Teulière <ipkiss @@ 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; 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, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *****************************************************************************/

#ifndef PLAY_WORD_MEDIATOR_H_
#define PLAY_WORD_MEDIATOR_H_

#include <string>
#include <QValidator>
#include <QPalette>

#include "logging.h"

using std::wstring;


class QLineEdit;
class QPushButton;
class PublicGame;
class Coord;
class PlayModel;
class Dictionary;

/**
 * Mediator handling the connections between the controls used to play a word.
 * The controls are:
 *  - a QLineEdit for the played word
 *  - a QLineEdit for the coordinates
 *  - a Play button to really play the word
 *
 * All the logic between these controls is handled by the mediator, as long as
 * it is alive (same lifetime as the controls themselves).
 * Note: this class is not a graphical widget, because it would cause problems
 * to place the controls exactly where wanted in the QGridLayout of the
 * PlayerWidget class...
 */
class PlayWordMediator: public QObject
{
    Q_OBJECT;
    DEFINE_LOGGER();

public:
    PlayWordMediator(QObject *parent, QLineEdit &iEditWord,
                     QLineEdit &iEditCoord, QLineEdit *iEditPoints,
                     QPushButton &iButtonPlay,
                     PlayModel &iPlayModel, PublicGame *iGame);

    /**
     * Set the focus on the editWord QLineEdit, unless the focus
     * is already on the editCoord one.
     */
    void setCleverFocus();

    /**
     * Set tooltips on the given widgets, to help
     * the user know how to enter a word.
     */
    static void SetTooltips(QLineEdit &iEditWord, QLineEdit &iEditCoord);

    /**
     * Return the word entered in the given line edit, and convert it
     * to the internal format.
     * If the result is false, the conversion failed, and an error message
     * can be found in *oProblemCause.
     */
    static bool GetPlayedWord(QLineEdit &iEditWord,
                              const Dictionary &iDic,
                              wstring *oPlayedWord,
                              QString *oProblemCause);

signals:
    void gameUpdated();
    void notifyProblem(QString iMsg);

private slots:
    void playWord();
    void updatePointsAndState();
    void onCoordChanged();
    void onWordChanged();
    void updateCoord(const Coord &iNewCoord);

private:
    PublicGame *m_game;
    QLineEdit &m_lineEditPlay;
    QLineEdit &m_lineEditCoord;
    QLineEdit *m_lineEditPoints;
    QPushButton &m_pushButtonPlay;
    PlayModel &m_playModel;

    /// Palette to write text in black
    QPalette blackPalette;

    /// Palette to write text in red
    QPalette redPalette;


    /**
     * Wrapper around GetPlayedWord(), more practical to use.
     * But it should be called only for a valid input!
     */
    wstring getWord();
};

#endif