/*
 * LCD Image Converter. Converts images and fonts for embedded applications.
 * Copyright (C) 2015 riuson
 * mailto: riuson@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 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 "toolline.h"
#include <QPainter>
#include <QList>
#include <QAction>
#include <QWidget>
#include <QColor>
#include <QSpinBox>
#include <QMouseEvent>
#include <QToolButton>
#include <QSettings>
#include <QColorDialog>
#include "bitmaphelper.h"
#include "iimageeditorparams.h"
//-----------------------------------------------------------------------------
namespace ImageEditor
{
//-----------------------------------------------------------------------------
ToolLine::ToolLine(IImageEditorParams *parameters, QObject *parent) : QObject(parent)
{
    this->mParameters = parameters;
    this->mIcon = new QIcon(QPixmap::fromImage(BitmapHelper::fromSvg(QString(":/images/icons/tools/tool_line"), 24)));

    this->mActions = new QList<QAction *>();
    this->mWidgets = new QList<QWidget *>();

    this->mSize = 1;

    this->loadSettings();
    this->initializeWidgets();
}
//-----------------------------------------------------------------------------
ToolLine::~ToolLine()
{
    this->saveSettings();
    delete this->mIcon;
    qDeleteAll(*this->mActions);
    qDeleteAll(*this->mWidgets);
    delete this->mActions;
    delete this->mWidgets;
}
//-----------------------------------------------------------------------------
const QString ToolLine::title() const
{
    return tr("Line");
}
//-----------------------------------------------------------------------------
const QString ToolLine::tooltip() const
{
    return tr("Draw line");
}
//-----------------------------------------------------------------------------
const QIcon *ToolLine::icon() const
{
    return this->mIcon;
}
//-----------------------------------------------------------------------------
const QList<QAction *> *ToolLine::actions() const
{
    return this->mActions;
}
//-----------------------------------------------------------------------------
const QList<QWidget *> *ToolLine::widgets() const
{
    return this->mWidgets;
}
//-----------------------------------------------------------------------------
bool ToolLine::processMouse(QMouseEvent *event,
                           const QImage *imageOriginal)
{
    if (event->type() == QEvent::MouseMove || event->type() == QEvent::MouseButtonPress)
    {
        if (event->type() == QEvent::MouseButtonPress)
        {
            this->mFlagChanged = false;
        }

        // get coordinates
        if (imageOriginal != NULL)
        {
            if (event->x() < imageOriginal->width() && event->y() < imageOriginal->height())
            {
                // get buttons
                bool buttonLeft = (event->buttons() & Qt::LeftButton) == Qt::LeftButton;
                bool buttonRight = (event->buttons() & Qt::RightButton) == Qt::RightButton;

                // draw on pixmap
                if (buttonLeft)
                {
                    if (!this->mFlagChanged)
                    {
                        this->mOriginalImage = *imageOriginal;
                        this->mStartPoint = event->pos();
                    }

                    QRect rect;
                    rect.setCoords(this->mStartPoint.x(), this->mStartPoint.y(), event->x(), event->y());
                    this->drawLine(rect, this->mSize, false);
                    this->mFlagChanged = true;
                    emit this->processing(&this->mInternalImage);
                }

                if(buttonRight)
                {
                    if (!this->mFlagChanged)
                    {
                        this->mOriginalImage = *imageOriginal;
                        this->mStartPoint = event->pos();
                    }

                    QRect rect;
                    rect.setCoords(this->mStartPoint.x(), this->mStartPoint.y(), event->x(), event->y());
                    this->drawLine(rect, this->mSize, true);
                    this->mFlagChanged = true;
                    emit this->processing(&this->mInternalImage);
                }
            }
        }
        event->accept();
    }
    else if (event->type() == QEvent::MouseButtonRelease)
    {
        emit this->completed(&this->mInternalImage, this->mFlagChanged);
    }

    return true;
}
//-----------------------------------------------------------------------------
void ToolLine::initializeWidgets()
{
    QSpinBox *spinBoxSize = new QSpinBox();
    spinBoxSize->setMinimum(1);
    spinBoxSize->setSuffix(QString("px"));
    spinBoxSize->setValue(this->mSize);
    spinBoxSize->setToolTip(tr("Line Width"));
    this->connect(spinBoxSize, SIGNAL(valueChanged(int)), SLOT(on_spinBoxSize_valueChanged(int)));
    this->mWidgets->append(spinBoxSize);
}
//-----------------------------------------------------------------------------
void ToolLine::loadSettings()
{
    QSettings sett;
    sett.beginGroup("window-image-editor");
    sett.beginGroup("tools");
    sett.beginGroup("line");

    bool ok;
    int a = sett.value("size", QVariant(1)).toInt(&ok);

    if (ok)
    {
        this->mSize = a;
    }

    sett.endGroup();
    sett.endGroup();
    sett.endGroup();
}
//-----------------------------------------------------------------------------
void ToolLine::saveSettings() const
{
    QSettings sett;
    sett.beginGroup("window-image-editor");
    sett.beginGroup("tools");
    sett.beginGroup("line");

    sett.setValue("size", QVariant(this->mSize));

    sett.endGroup();
    sett.endGroup();
    sett.endGroup();
}
//-----------------------------------------------------------------------------
void ToolLine::drawLine(const QRect &rect, int borderWidth, bool inverted)
{
    QImage image = this->mOriginalImage;
    QPixmap pixmap = QPixmap::fromImage(image);
    QPainter painter(&pixmap);

    QColor fc = this->mParameters->foreColor();
    QColor bc = this->mParameters->backColor();

    if (inverted)
    {
        bc = this->mParameters->foreColor();
        fc = this->mParameters->backColor();
    }

    QPen pen(fc, borderWidth);
    painter.setRenderHint(QPainter::Antialiasing, false);
    //painter.setRenderHint(QPainter::Antialiasing);
    painter.setRenderHint(QPainter::HighQualityAntialiasing, false);
    painter.setPen(pen);
    painter.drawLine(rect.left(), rect.top(), rect.right(), rect.bottom());

    this->mInternalImage = pixmap.toImage();
}
//-----------------------------------------------------------------------------
void ToolLine::on_spinBoxSize_valueChanged(int value)
{
    this->mSize = value;
}
//-----------------------------------------------------------------------------
} // end of namespace
//-----------------------------------------------------------------------------