/*
 * Commands.cpp
 *
 * (c) 2014 Sofian Audry -- info(@)sofianaudry(.)com
 * (c) 2014 Alexandre Quessy -- alexandre(@)quessy(.)net
 * (c) 2014 Dame Diongue -- baydamd(@)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 "MainWindow.h"
#include "MapperGLCanvas.h"

#include "Commands.h"

MM_BEGIN_NAMESPACE

AddPaintCommand::AddPaintCommand(MainWindow *mainWindow, uid paintId, const QIcon &icon, const QString &name, QUndoCommand *parent) :
  QUndoCommand(parent),
  _mainWindow(mainWindow),
  _paintId(paintId),
  _icon(icon),
  _name(name)
{
  setText(QObject::tr("Add paint"));
}

void AddPaintCommand::undo()
{
  _paint = _mainWindow->getMappingManager().getPaintById(_paintId);
  _mainWindow->removePaintItem(_paintId);
}

void AddPaintCommand::redo()
{
  if (!_paint.isNull())
  {
    uid lastId = _mainWindow->getMappingManager().addPaint(_paint);
    _mainWindow->addPaintItem(lastId, _icon, _name);
  }
  else {
    _mainWindow->addPaintItem(_paintId, _icon, _name);
  }
}

AddShapesCommand::AddShapesCommand(MainWindow *mainWindow, uid mappingId, QUndoCommand *parent):
  QUndoCommand(parent),
  _mainWindow(mainWindow),
  _mappingId(mappingId)
{
  setText(QObject::tr("Add mapping"));
}

void AddShapesCommand::undo()
{
  _mapping = _mainWindow->getMappingManager().getMappingById(_mappingId);
  _mainWindow->deleteMapping(_mappingId);
}

void AddShapesCommand::redo()
{
  if (!_mapping.isNull())
  {
    uid storedId = _mainWindow->getMappingManager().addMapping(_mapping);
    _mainWindow->addMappingItem(storedId);
  }
  else
  {
    _mainWindow->addMappingItem(_mappingId);
  }
}


TransformShapeCommand::TransformShapeCommand(MapperGLCanvas* canvas, TransformShapeOption option, QUndoCommand* parent)
  : QUndoCommand(parent),
    _canvas(canvas), _option(option) {
  // Copy shape.
  _shape = canvas->getCurrentShape();
  _option = option;

  // Clone shape before applying transform.
  _originalShape.reset(_shape.toStrongRef()->clone());
}

void TransformShapeCommand::undo() {
  // Copy back shape.
  _shape.toStrongRef()->copyFrom(*_originalShape);

  // Update everything.
  _canvas->currentShapeWasChanged();
  _canvas->update();
}

void TransformShapeCommand::redo() {
  // Call transformation.
  _doTransform(_shape);

  // Update everything.
  _canvas->currentShapeWasChanged();
  _canvas->update();
}

bool TransformShapeCommand::mergeWith(const QUndoCommand* other) {
  // Make sure other is of the same type (id).
  if (other->id() != id())
    return false;

  const TransformShapeCommand* cmd = static_cast<const TransformShapeCommand*>(other);

  // Don't merge a new transform with a dropped tranform move (ie. each drag'n'drop is considered
  // as a single separate command).
  if (_option == RELEASE && cmd->_option == FREE)
    return false;

  // Don't merge transforms
  if (cmd->_canvas != _canvas ||
      cmd->_shape != _shape)
    return false;

  return true;
}

MoveVertexCommand::MoveVertexCommand(MapperGLCanvas* canvas, TransformShapeOption option, int activeVertex, const QPointF &point, QUndoCommand *parent)
  : TransformShapeCommand(canvas, option, parent),
    _movedVertex(activeVertex),
    _vertexPosition(point)
{
  setText(QObject::tr("Move vertex"));
}

int MoveVertexCommand::id() const { return (_option == STEP ? CMD_KEY_MOVE_VERTEX : CMD_MOUSE_MOVE_VERTEX); }

void MoveVertexCommand::_doTransform(MShape::ptr shape)
{
  shape->setVertex(_movedVertex, _vertexPosition);
}

bool MoveVertexCommand::mergeWith(const QUndoCommand* other)
{
  if (!TransformShapeCommand::mergeWith(other))
    return false;

  const MoveVertexCommand* cmd = static_cast<const MoveVertexCommand*>(other);

  // Needs to be the same vertex.
  if (cmd->_movedVertex != _movedVertex)
    return false;

  _vertexPosition = cmd->_vertexPosition;
  _option = cmd->_option;
  return true;
}


TranslateShapeCommand::TranslateShapeCommand(MapperGLCanvas *canvas, TransformShapeOption option, const QPointF &translation, QUndoCommand *parent)
  : TransformShapeCommand(canvas, option, parent),
    _translation(translation)
{
  setText(QObject::tr("Move shape"));
}

int TranslateShapeCommand::id() const { return (_option == STEP ? CMD_KEY_TRANSLATE_SHAPE : CMD_MOUSE_TRANSLATE_SHAPE); }

bool TranslateShapeCommand::mergeWith(const QUndoCommand* other)
{
  if (!TransformShapeCommand::mergeWith(other))
    return false;

  const TranslateShapeCommand* cmd = static_cast<const TranslateShapeCommand*>(other);

  // Update translation.
  _translation += cmd->_translation;
  _option = cmd->_option;
  return true;
}

void TranslateShapeCommand::_doTransform(MShape::ptr shape)
{
  // Apply translation.
  shape->translate(_translation);
}

RemovePaintCommand::RemovePaintCommand(MainWindow *mainWindow, uid paintId, QUndoCommand *parent):
  QUndoCommand(parent),
  _mainWindow(mainWindow),
  _paintId(paintId)
{
  setText(QObject::tr("Remove paint"));
}

void RemovePaintCommand::undo()
{
  if (!_paint.isNull())
  {
    uid lastId = _mainWindow->getMappingManager().addPaint(_paint);
    _mainWindow->addPaintItem(lastId, _paint->getIcon(), _paint->getName());
  }
}

void RemovePaintCommand::redo()
{
  _paint = _mainWindow->getMappingManager().getPaintById(_paintId);
  _mainWindow->deletePaint(_paintId);
}



DeleteMappingCommand::DeleteMappingCommand(MainWindow *mainWindow, uid mappingId, QUndoCommand *parent) :
  QUndoCommand(parent),
  _mainWindow(mainWindow),
  _mappingId(mappingId)
{
  setText(QObject::tr("Delete mapping"));
}

void DeleteMappingCommand::undo()
{
  if (!_mapping.isNull())
  {
    uid storedId = _mainWindow->getMappingManager().addMapping(_mapping);
    _mainWindow->addMappingItem(storedId);
  }
}

void DeleteMappingCommand::redo()
{
  // Store mapping pointer before delete it
  _mapping = _mainWindow->getMappingManager().getMappingById(_mappingId);
  _mainWindow->deleteMapping(_mappingId);
}

MM_END_NAMESPACE