/*
 * 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 "toolfill.h"

#include <QAction>
#include <QColor>
#include <QColorDialog>
#include <QList>
#include <QMouseEvent>
#include <QPainter>
#include <QPainterPath>
#include <QSpinBox>
#include <QToolButton>
#include <QVector>
#include <QWidget>

#include "appsettings.h"
#include "bitmaphelper.h"
#include "iimageeditorparams.h"

namespace ImageEditor
{
namespace Tools
{

ToolFill::ToolFill(IImageEditorParams* parameters, QObject* parent) : QObject(parent)
{
  this->mParameters = parameters;
  this->mIcon = new QIcon(
      QPixmap::fromImage(Parsing::Conversion::BitmapHelper::fromSvg(QString(":/images/icons/tools/tool_fill"), 24)));

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

  this->mSize = 1;
  this->mFlagChanged = false;

  this->loadSettings();
  this->initializeWidgets();
}

ToolFill::~ToolFill()
{
  this->saveSettings();
  delete this->mIcon;
  qDeleteAll(*this->mActions);
  qDeleteAll(*this->mWidgets);
  delete this->mActions;
  delete this->mWidgets;
}

const QString ToolFill::title() const { return tr("Fill"); }

const QString ToolFill::tooltip() const
{
  return tr("<b>Fill area</b><br/>Use left mouse button to fill with forecolor.<br/>Use right mouse button to fill "
            "with backcolor.");
}

const QIcon* ToolFill::icon() const { return this->mIcon; }

const QList<QAction*>* ToolFill::actions() const { return this->mActions; }

const QList<QWidget*>* ToolFill::widgets() const { return this->mWidgets; }

bool ToolFill::processMouse(QMouseEvent* event, const QImage* imageOriginal, bool inRect)
{
  if (event->type() == QEvent::MouseMove || event->type() == QEvent::MouseButtonPress) {
    if (event->type() == QEvent::MouseButtonPress) {
      // get coordinates
      if (imageOriginal != nullptr) {
        if (inRect) {
          // get buttons
          bool buttonLeft = (event->buttons() & Qt::LeftButton) == Qt::LeftButton;
          bool buttonRight = (event->buttons() & Qt::RightButton) == Qt::RightButton;

          // draw on pixmap
          if (buttonLeft) {
            this->mInternalImage = *imageOriginal;
            this->mFlagChanged = false;

            bool success = this->fillArea(event->x(), event->y(), this->mParameters->foreColor());

            if (success) {
              this->mFlagChanged = true;
            }

            emit this->processing(&this->mInternalImage);
          }

          if (buttonRight) {
            this->mInternalImage = *imageOriginal;
            this->mFlagChanged = false;

            bool success = this->fillArea(event->x(), event->y(), this->mParameters->backColor());

            if (success) {
              this->mFlagChanged = true;
            }

            emit this->processing(&this->mInternalImage);
          }
        }
      }

      event->accept();
      emit this->completed(&this->mInternalImage, this->mFlagChanged);
    }
  }

  return true;
}

void ToolFill::initializeWidgets() {}

void ToolFill::loadSettings()
{
  Settings::AppSettings appsett;
  QSettings& sett = appsett.get();
  sett.beginGroup("window-image-editor");
  sett.beginGroup("tools");
  sett.beginGroup("fill");

  sett.endGroup();
  sett.endGroup();
  sett.endGroup();
}

void ToolFill::saveSettings() const
{
  Settings::AppSettings appsett;
  QSettings& sett = appsett.get();
  sett.beginGroup("window-image-editor");
  sett.beginGroup("tools");
  sett.beginGroup("fill");

  sett.endGroup();
  sett.endGroup();
  sett.endGroup();
}

bool ToolFill::fillArea(int x, int y, const QColor& color)
{
  QImage image = this->mInternalImage;
  QRgb keyColor = image.pixel(x, y);
  QVector<QPoint> vector1;

  this->collectPointsAround(image, QPoint(x, y), keyColor, &vector1);

  int lastLength = 0;

  while (vector1.size() > lastLength) {
    lastLength = vector1.size();

    for (int i = 0; i < lastLength; i++) {
      // painter.drawPoint(vector1.at(i));
      this->collectPointsAround(image, vector1.at(i), keyColor, &vector1);
    }
  }

  if (vector1.size() > 0) {
    QPixmap pixmap = QPixmap::fromImage(image);
    QPainter painter(&pixmap);
    painter.setPen(color);

    if (!this->mParameters->selectedPath().isEmpty()) {
      painter.setClipPath(this->mParameters->selectedPath());
    }

    for (int i = 0; i < vector1.size(); i++) {
      painter.drawPoint(vector1.at(i));
    }

    image = pixmap.toImage();
    this->mInternalImage = image;
    return true;
  }

  return false;
}

void ToolFill::collectPointsAround(const QImage& image, const QPoint& point, const QRgb& color, QVector<QPoint>* vector)
{
  int x = point.x();
  int y = point.y();

  // this->collectPoint(image, QPoint(x - 1, y - 1), color, vector);
  this->collectPoint(image, QPoint(x - 0, y - 1), color, vector);
  // this->collectPoint(image, QPoint(x + 1, y - 1), color, vector);
  this->collectPoint(image, QPoint(x - 1, y - 0), color, vector);
  this->collectPoint(image, QPoint(x - 0, y - 0), color, vector);
  this->collectPoint(image, QPoint(x + 1, y - 0), color, vector);
  // this->collectPoint(image, QPoint(x - 1, y + 1), color, vector);
  this->collectPoint(image, QPoint(x - 0, y + 1), color, vector);
  // this->collectPoint(image, QPoint(x + 1, y + 1), color, vector);
}

void ToolFill::collectPoint(const QImage& image, const QPoint& point, const QRgb& color, QVector<QPoint>* vector)
{
  if (point.x() >= 0 && point.y() >= 0 && point.x() < image.width() && point.y() < image.height()) {
    if (!vector->contains(point)) {
      if (image.pixel(point) == color) {
        vector->append(point);
      }
    }
  }
}

void ToolFill::on_spinBoxSize_valueChanged(int value) { this->mSize = value; }

} // namespace Tools
} // namespace ImageEditor