/*
 * LCD Image Converter. Converts images and fonts for embedded applications.
 * Copyright (C) 2010 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 "widgetbitmapeditor.h"

#include "ui_widgetbitmapeditor.h"

#include <QColorDialog>
#include <QMouseEvent>
#include <QPainter>

#include "bitmaphelper.h"

namespace AppUI
{
namespace Images
{

WidgetBitmapEditor::WidgetBitmapEditor(QWidget* parent) : QWidget(parent), ui(new Ui::WidgetBitmapEditor)
{
  ui->setupUi(this);

  this->mScale = 1;

  this->ui->label->installEventFilter(this);

  this->mColor1 = QColor();
  this->mColor2 = QColor();

  this->mPixmapColor1 = QPixmap(16, 16);
  this->mPixmapColor2 = QPixmap(16, 16);
  this->mPixmapColor1.fill(this->mColor1);
  this->mPixmapColor2.fill(this->mColor2);
  this->mFlagChanged = false;
  this->ui->pushButtonColor1->setIcon(QIcon(this->mPixmapColor1));
  this->ui->pushButtonColor2->setIcon(QIcon(this->mPixmapColor2));

  this->mImageOriginal = QImage();

  this->ui->spinBoxScale->setValue(this->mScale);
}

WidgetBitmapEditor::~WidgetBitmapEditor() { delete ui; }

void WidgetBitmapEditor::changeEvent(QEvent* e)
{
  QWidget::changeEvent(e);

  switch (e->type()) {
    case QEvent::LanguageChange:
      ui->retranslateUi(this);
      this->updateImageScaled(this->mScale);
      break;

    default:
      break;
  }
}

bool WidgetBitmapEditor::eventFilter(QObject* obj, QEvent* event)
{
  bool result = false;

  if (event->type() == QEvent::MouseMove || event->type() == QEvent::MouseButtonPress) {
    if (event->type() == QEvent::MouseButtonPress) {
      this->mFlagChanged = false;
    }

    QMouseEvent* me = static_cast<QMouseEvent*>(event);

    // get coordinates
    int xscaled = me->pos().x();
    int yscaled = me->pos().y();
    int xreal = xscaled / this->mScale;
    int yreal = yscaled / this->mScale;

    if (!this->mImageOriginal.isNull()) {
      if (xreal < this->mImageOriginal.width() && yreal < this->mImageOriginal.height()) {
        // show coordinates
        QPoint mouseCoordinates(xreal, yreal);
        emit this->mouseMove(mouseCoordinates);

        // get buttons
        bool buttonLeft = (me->buttons() & Qt::LeftButton) == Qt::LeftButton;
        bool buttonRight = (me->buttons() & Qt::RightButton) == Qt::RightButton;

        // draw on pixmap
        if (buttonLeft) {
          this->drawPixel(xreal, yreal, this->mColor1);
          this->mFlagChanged = true;
        }

        if (buttonRight) {
          this->drawPixel(xreal, yreal, this->mColor2);
          this->mFlagChanged = true;
        }
      } else {
        QPoint mouseCoordinates(-1, -1);
        emit this->mouseMove(mouseCoordinates);
      }
    }

    event->accept();
  } else if (event->type() == QEvent::MouseButtonRelease) {
    if (this->mFlagChanged) {
      emit this->imageChanged();
    }

    this->mFlagChanged = false;
  } else {
    result = QObject::eventFilter(obj, event);
  }

  return result;
}

void WidgetBitmapEditor::wheelEvent(QWheelEvent* event)
{
  if ((event->modifiers() & Qt::ControlModifier) == Qt::ControlModifier) {
    QPoint point = event->globalPosition().toPoint();
    point = this->mapFromGlobal(point);

    QRect labelRect = this->ui->label->rect();
    QPoint labelPoint = this->ui->label->pos();
    labelRect.moveTo(labelPoint);

    if (labelRect.contains(point.x(), point.y())) {
      if (qAbs(event->angleDelta().x()) < qAbs(event->angleDelta().y())) {
        int scale = this->mScale;

        if (event->angleDelta().y() > 0) {
          scale++;
        } else {
          scale--;
        }

        this->setScale(scale);
        this->ui->spinBoxScale->setValue(this->mScale);
      }

      event->accept();
    }
  }
}

const QImage* WidgetBitmapEditor::image() const
{
  const QImage* result = &this->mImageOriginal;
  return result;
}

void WidgetBitmapEditor::setImage(const QImage* value)
{
  this->mImageOriginal = QImage(*value);
  this->updateImageScaled(this->mScale);
}

QColor WidgetBitmapEditor::color1() const { return this->mColor1; }

QColor WidgetBitmapEditor::color2() const { return this->mColor2; }

int WidgetBitmapEditor::scale() const { return this->mScale; }

void WidgetBitmapEditor::updateImageScaled(int scale)
{
  if (!this->mImageOriginal.isNull()) {
    this->mImageScaled = Parsing::Conversion::BitmapHelper::scale(&this->mImageOriginal, scale);
    this->mImageScaled = Parsing::Conversion::BitmapHelper::drawGrid(&this->mImageScaled, scale);
    this->mPixmapScaled = QPixmap::fromImage(this->mImageScaled);

    this->ui->label->setPixmap(this->mPixmapScaled);
  }
}

void WidgetBitmapEditor::drawPixel(int x, int y, const QColor& color)
{
  QImage image = this->mImageOriginal;
  this->mImageOriginal = Parsing::Conversion::BitmapHelper::drawPixel(&image, x, y, color);
  this->updateImageScaled(this->mScale);
}

void WidgetBitmapEditor::on_spinBoxScale_valueChanged(int value) { this->setScale(value); }

void WidgetBitmapEditor::on_pushButtonColor1_clicked()
{
  QColorDialog dialog(this->mColor1, this);
  dialog.setOption(QColorDialog::ShowAlphaChannel, true);

  if (dialog.exec() == QDialog::Accepted) {
    this->mColor1 = dialog.selectedColor();
    // BitmapEditorOptions::setColor1(this->mColor1);
    this->mPixmapColor1.fill(this->mColor1);
    this->ui->pushButtonColor1->setIcon(QIcon(this->mPixmapColor1));
  }
}

void WidgetBitmapEditor::on_pushButtonColor2_clicked()
{
  QColorDialog dialog(this->mColor2, this);
  dialog.setOption(QColorDialog::ShowAlphaChannel, true);

  if (dialog.exec() == QDialog::Accepted) {
    this->mColor2 = dialog.selectedColor();
    // BitmapEditorOptions::setColor2(this->mColor2);
    this->mPixmapColor2.fill(this->mColor2);
    this->ui->pushButtonColor2->setIcon(QIcon(this->mPixmapColor2));
  }
}

void WidgetBitmapEditor::setScale(int value)
{
  if (this->mScale != value) {
    this->mScale = value;
    this->updateImageScaled(this->mScale);

    // BitmapEditorOptions::setScale(value);

    emit this->scaleSchanged(this->mScale);
  }
}

void WidgetBitmapEditor::setColor1(const QColor value) { this->mColor1 = value; }

void WidgetBitmapEditor::setColor2(const QColor value) { this->mColor2 = value; }

} // namespace Images
} // namespace AppUI