/***************************************************************************
 *   Copyright (C) 2005-2018 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.         *
 ***************************************************************************/

#ifndef QTUISTYLE_H_
#define QTUISTYLE_H_

#include "uistyle.h"
#include "qtuisettings.h"

class QtUiStyle : public UiStyle
{
    Q_OBJECT

public:
    QtUiStyle(QObject *parent = 0);
    virtual ~QtUiStyle();

    virtual inline qreal firstColumnSeparator() const { return 6; }
    virtual inline qreal secondColumnSeparator() const { return 6; }

public slots:
    /**
     * Generates initial settingsQss if it doesn't exist
     *
     * This allows for default fonts, colors, etc to specified.
     */

    void initializeSettingsQss();

    /**
     * Generates UI stylesheet based on selected fonts, colors, etc
     */
    void generateSettingsQss() const;

private slots:
    /**
     * Updates knowledge of whether or not to use the custom timestamp format
     */
    void updateUseCustomTimestampFormat();

    /**
     * Updates knowledge of the current timestamp format
     */
    void updateTimestampFormatString();
    
    /**
     * Updates knowledge of how to display sender prefix modes
     */
    void updateSenderPrefixDisplay();

    /**
     * Updates knowledge of whether or not to show sender brackets
     */
    void updateShowSenderBrackets();

private:
    QString fontDescription(const QFont &font) const;

    /**
     * Generate a Qt stylesheet color string from a given setting
     *
     * @param[in] key          Reference to settings key containing a QColor
     * @param[in] settings     UiSettings manager to search
     * @param[in] defaultColor Fallback color if not found; when unspecified default is black
     */
    QString color(const QString &key, UiSettings &settings, const QColor &defaultColor = QColor()) const;

    QString msgTypeQss(const QString &msgType, const QString &key, UiSettings &settings) const;

    /**
     * Generates the Qss color palette stylesheet for sender colors
     *
     * This must be called before generating any Qss dependent on these colors.
     *
     * @see QtUiStyle::senderQss()
     * @param[in] settings     Reference to current UI settings, used for loading color values
     * @return Quassel-theme-compatible Qss color palette
     */
    QString senderPaletteQss(UiSettings &settings) const;

    /**
     * Generate a snippet of Qss stylesheet for a given sender-hash index
     *
     * This depends on the color palette generated by QtUiStyle::senderPaletteQss()
     *
     * @param[in] i            Sender hash index from 0 - 15
     * @param[in] messageType  Type of message to filter, e.g. 'plain' or 'action'
     * @param[in] includeNick  Also apply foreground color to Nick
     * @return Snippet of Quassel-theme-compatible Qss stylesheet
     */
    QString senderQss(int i, const QString &messageType, bool includeNick = false) const;

    /**
     * Generate a snippet of Qss stylesheet for a given IRC nickname sender-hash index
     *
     * This depends on the color palette generated by QtUiStyle::senderPaletteQss()
     *
     * @param[in] i            Sender hash index from 0 - 15
     * @return Snippet of Quassel-theme-compatible Qss stylesheet
     */
    QString nickQss(int i) const;

    QString chatListItemQss(const QString &state, const QString &key, UiSettings &settings) const;
};


#endif
