// Squawk messenger. 
// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
// 
// 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 3 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 <http://www.gnu.org/licenses/>.

#include "keydelegate.h"
#include <QPainter>
#include <QFontDatabase>

#include "keysmodel.h"

constexpr int minHeight = 50;
constexpr int minWidth = 400;

UI::KeyDelegate::KeyDelegate(QObject* parent):
    QStyledItemDelegate(parent),
    fingerPrintFont(QFontDatabase::systemFont(QFontDatabase::FixedFont))
{
}

UI::KeyDelegate::~KeyDelegate() {}


void UI::KeyDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const {
    painter->save();
    painter->setRenderHint(QPainter::Antialiasing, true);

    bool hover = option.state & QStyle::State_MouseOver;
    if (hover) {
        painter->save();
        painter->fillRect(option.rect, option.palette.brush(QPalette::Inactive, QPalette::Highlight));
        painter->restore();
    }

    QVariant fingerPrintV = index.data(UI::KeysModel::FingerPrint);
    if (fingerPrintV.isValid()) {
        painter->save();
        QByteArray fingerPrint = fingerPrintV.toByteArray();

        painter->setFont(fingerPrintFont);
        painter->drawText(option.rect, option.displayAlignment | Qt::AlignTop, fingerPrint.toHex());

        painter->restore();
    }
    painter->drawText(option.rect, option.displayAlignment, index.data().toString());

    painter->restore();
}

QSize UI::KeyDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const {
    QSize size = QStyledItemDelegate::sizeHint(option, index);

    if (size.width() < minWidth)
        size.setWidth(minWidth);

    if (size.height() < minHeight)
        size.setHeight(minHeight);

    return size;
}