/*  ModelObject.cpp
 *
 *  Copyright (C) 2013  Jaye Evins <evins@snaught.com>
 *
 *  This file is part of gLabels-qt.
 *
 *  gLabels-qt 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.
 *
 *  gLabels-qt 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 gLabels-qt.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "ModelObject.h"

#include "ColorNode.h"
#include "Region.h"
#include "Size.h"
#include "TextNode.h"

#include <QFont>
#include <QtDebug>


namespace glabels
{
	namespace model
	{

		///
		/// Next Object ID
		///
		int ModelObject::msNextId = 0;


		///
		/// Constructor
		///
		ModelObject::ModelObject() : QObject(nullptr)
		{
			mId = msNextId++;

			mX0 = 0;
			mY0 = 0;
			mW  = 0;
			mH  = 0;
			mLockAspectRatio = false;
			mMatrix = QTransform();

			mShadowState     = false;
			mShadowX         = 1.3;
			mShadowY         = 1.3;
			mShadowColorNode = ColorNode( QColor( 0, 0, 0 ) );
			mShadowOpacity   = 0.5;

			mSelectedFlag = false;

			mOutline = nullptr;
		}


		///
		/// Constructor
		///
		ModelObject::ModelObject( const Distance&  x0,
		                          const Distance&  y0,
		                          const Distance&  w,
		                          const Distance&  h,
		                          bool             lockAspectRatio,
		                          const QTransform& matrix,
		                          bool             shadowState,
		                          const Distance&  shadowX,
		                          const Distance&  shadowY,
		                          double           shadowOpacity,
		                          const ColorNode& shadowColorNode ) : QObject(nullptr)
		{
			mId = msNextId++;

			mX0 = x0;
			mY0 = y0;
			mW  = w;
			mH  = h;
			mLockAspectRatio = lockAspectRatio;
			mMatrix = matrix;

			mShadowState     = shadowState;
			mShadowX         = shadowX;
			mShadowY         = shadowY;
			mShadowColorNode = shadowColorNode;
			mShadowOpacity   = shadowOpacity;

			mSelectedFlag = false;

			mOutline = nullptr;
		}
	
		
		///
		/// Copy constructor
		///
		ModelObject::ModelObject( const ModelObject* object )
		{
			mId = msNextId++;

			mSelectedFlag    = object->mSelectedFlag;

			mX0              = object->mX0;
			mY0              = object->mY0;
			mW               = object->mW;
			mH               = object->mH;
			mLockAspectRatio = object->mLockAspectRatio;

			mShadowState     = object->mShadowState;
			mShadowX         = object->mShadowX;
			mShadowY         = object->mShadowY;
			mShadowOpacity   = object->mShadowOpacity;
			mShadowColorNode = object->mShadowColorNode;

			foreach ( Handle* handle, object->mHandles )
			{
				mHandles.append( handle->clone( this ) );
			}
	
			if ( object->mOutline )
			{
				mOutline = object->mOutline->clone( this );
			}
			else
			{
				mOutline = nullptr;
			}

			mMatrix          = object->mMatrix;
		}


		///
		/// Destructor
		///
		ModelObject::~ModelObject()
		{
			// empty
		}


		///
		/// ID Property Getter
		///
		int ModelObject::id() const
		{
			return mId;
		}


		///
		/// Selected Property Getter
		///
		bool ModelObject::isSelected() const
		{
			return mSelectedFlag;
		}


		///
		/// Selected Property Setter
		///
		void ModelObject::select( bool value )
		{
			mSelectedFlag = value;
		}


		///
		/// Clear Selected Property Setter
		///
		void ModelObject::unselect()
		{
			mSelectedFlag = false;
		}


		///
		/// X0 Property Getter
		///
		Distance ModelObject::x0() const
		{
			return mX0;
		}


		///
		/// X0 Property Setter
		///
		void ModelObject::setX0( const Distance& value )
		{
			if ( mX0 != value )
			{
				mX0 = value;
				emit moved();
			}
		}
		

		///
		/// Y0 Property Getter
		///
		Distance ModelObject::y0() const
		{
			return mY0;
		}


		///
		/// Y0 Property Setter
		///
		void ModelObject::setY0( const Distance& value )
		{
			if ( mY0 != value )
			{
				mY0 = value;
				emit moved();
			}
		}
		

		///
		/// W (Width) Property Getter
		///
		Distance ModelObject::w() const
		{
			return mW;
		}


		///
		/// W (Width) Property Setter
		///
		void ModelObject::setW( const Distance& value )
		{
			if ( mW != value )
			{
				mW = value;
				sizeUpdated();
				emit changed();
			}
		}
		

		///
		/// H (Height) Property Getter
		///
		Distance ModelObject::h() const
		{
			return mH;
		}


		///
		/// H (Height) Property Setter
		///
		void ModelObject::setH( const Distance& value )
		{
			if ( mH != value )
			{
				mH = value;
				sizeUpdated();
				emit changed();
			}
		}


		///
		/// Lock Aspect Ratio Property Getter
		///
		bool ModelObject::lockAspectRatio() const
		{
			return mLockAspectRatio;
		}


		///
		/// Lock Aspect Ratio Property Setter
		///
		void ModelObject::setLockAspectRatio( bool value )
		{
			if ( mLockAspectRatio != value )
			{
				mLockAspectRatio = value;
				emit changed();
			}
		}


		///
		/// Matrix Property Getter
		///
		QTransform ModelObject::matrix() const
		{
			return mMatrix;
		}


		///
		/// Matrix Property Setter
		///
		void ModelObject::setMatrix( const QTransform& value )
		{
			if ( mMatrix != value )
			{
				mMatrix = value;
				emit changed();
			}
		}


		///
		/// Shadow State Property Getter
		///
		bool ModelObject::shadow() const
		{
			return mShadowState;
		}


		///
		/// Shadow State Property Setter
		///
		void ModelObject::setShadow( bool value )
		{
			if ( mShadowState != value )
			{
				mShadowState = value;
				emit changed();
			}
		}


		///
		/// Shadow X Property Getter
		///
		Distance ModelObject::shadowX() const
		{
			return mShadowX;
		}


		///
		/// Shadow X Property Setter
		///
		void ModelObject::setShadowX( const Distance& value )
		{
			if ( mShadowX != value )
			{
				mShadowX = value;
				emit changed();
			}
		}
		

		///
		/// Shadow Y Property Getter
		///
		Distance ModelObject::shadowY() const
		{
			return mShadowY;
		}


		///
		/// Shadow Y Property Setter
		///
		void ModelObject::setShadowY( const Distance& value )
		{
			if ( mShadowY != value )
			{
				mShadowY = value;
				emit changed();
			}
		}
		

		///
		/// Shadow Opacity Property Getter
		///
		double ModelObject::shadowOpacity() const
		{
			return mShadowOpacity;
		}


		///
		/// Shadow Opacity Property Setter
		///
		void ModelObject::setShadowOpacity( double value )
		{
			if ( mShadowOpacity != value )
			{
				mShadowOpacity = value;
				emit changed();
			}
		}
		

		///
		/// Shadow Color Node Property Getter
		///
		ColorNode ModelObject::shadowColorNode() const
		{
			return mShadowColorNode;
		}


		///
		/// Shadow Color Node Property Setter
		///
		void ModelObject::setShadowColorNode( const ColorNode& value )
		{
			if ( mShadowColorNode != value )
			{
				mShadowColorNode = value;
				emit changed();
			}
		}
		

		///
		/// Virtual Natural Size Property Default Getter
		/// (Overridden by concrete class)
		///
		Size ModelObject::naturalSize() const
		{
			return Size( Distance::pt(0), Distance::pt(0) );
		}


		///
		/// Virtual Text Property Default Getter
		/// (Overridden by concrete class)
		///
		QString ModelObject::text() const
		{
			return "";
		}


		///
		/// Virtual Text Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setText( const QString& value )
		{
			// empty
		}


		///
		/// Virtual Font Family Property Default Getter
		/// (Overridden by concrete class)
		///
		QString ModelObject::fontFamily() const
		{
			return "";
		}


		///
		/// Virtual Font Family Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setFontFamily( const QString& value )
		{
			// empty
		}


		///
		/// Virtual Font Size Property Default Getter
		/// (Overridden by concrete class)
		///
		double ModelObject::fontSize() const
		{
			return 0;
		}


		///
		/// Virtual Font Size Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setFontSize( double value )
		{
			// empty
		}


		///
		/// Virtual Font Weight Property Default Getter
		/// (Overridden by concrete class)
		///
		QFont::Weight ModelObject::fontWeight() const
		{
			return QFont::Normal;
		}


		///
		/// Virtual Font Weight Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setFontWeight( QFont::Weight value )
		{
			// empty
		}


		///
		/// Virtual Font Italic Flag Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::fontItalicFlag() const
		{
			return false;
		}


		///
		/// Virtual Font Italic Flag Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setFontItalicFlag( bool value )
		{
			// empty
		}


		///
		/// Virtual Font Underline Flag Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::fontUnderlineFlag() const
		{
			return false;
		}


		///
		/// Virtual Font Underline Flag Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setFontUnderlineFlag( bool value )
		{
			// empty
		}


		///
		/// Virtual Text Color Node Property Default Getter
		/// (Overridden by concrete class)
		///
		ColorNode ModelObject::textColorNode() const
		{
			return ColorNode( QColor::fromRgba(0x00000000) );
		}


		///
		/// Virtual Text Color Node Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setTextColorNode( const ColorNode &value )
		{
			// empty
		}
		

		///
		/// Virtual Text Horizontal Alignment Property Default Getter
		/// (Overridden by concrete class)
		///
		Qt::Alignment ModelObject::textHAlign() const
		{
			return Qt::AlignLeft;
		}


		///
		/// Virtual Text Horizontal Alignment Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setTextHAlign( Qt::Alignment value )
		{
			// empty
		}


		///
		/// Virtual Text Vertical Alignment Property Default Getter
		/// (Overridden by concrete class)
		///
		Qt::Alignment ModelObject::textVAlign() const
		{
			return Qt::AlignTop;
		}


		///
		/// Virtual Text Vertical Alignment Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setTextVAlign( Qt::Alignment value )
		{
			// empty
		}


		///
		/// Virtual Text Wrap Mode Property Default Getter
		/// (Overridden by concrete class)
		///
		QTextOption::WrapMode ModelObject::textWrapMode() const
		{
			return QTextOption::WordWrap;
		}


		///
		/// Virtual Text Wrap Mode Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setTextWrapMode( QTextOption::WrapMode value )
		{
			// empty
		}


		///
		/// Virtual Text Line Spacing Property Default Getter
		/// (Overridden by concrete class)
		///
		double ModelObject::textLineSpacing() const
		{
			return 0;
		}


		///
		/// Virtual Text Line Spacing Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setTextLineSpacing( double value )
		{
			// empty
		}


		///
		/// Virtual Text Auto Shrink Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::textAutoShrink() const
		{
			return false;
		}


		///
		/// Virtual Text Auto Shrink Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setTextAutoShrink( bool value )
		{
			// empty
		}


		///
		/// Virtual Filename Node Property Default Getter
		/// (Overridden by concrete class)
		///
		TextNode ModelObject::filenameNode() const
		{
			return TextNode();
		}


		///
		/// Virtual Filename Node Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setFilenameNode( const TextNode& value )
		{
			// empty
		}
		

		///
		/// Virtual Image Property Default Getter
		/// (Overridden by concrete class)
		///
		const QImage* ModelObject::image() const
		{
			return nullptr;
		}


		///
		/// Virtual Image Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setImage( const QImage& value )
		{
			// empty
		}
		

		///
		/// Virtual Image Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setImage( const QString& name, const QImage& value )
		{
			// empty
		}
		

		///
		/// Virtual SVG Property Default Getter
		/// (Overridden by concrete class)
		///
		QByteArray ModelObject::svg() const
		{
			return QByteArray();
		}


		///
		/// Virtual SVG Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setSvg( const QString& name, const QByteArray& value )
		{
			// empty
		}
		

		///
		/// Virtual Line Width Property Default Getter
		/// (Overridden by concrete class)
		///
		Distance ModelObject::lineWidth() const
		{
			return 0;
		}


		///
		/// Virtual Line Width Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setLineWidth( const Distance& value )
		{
			// empty
		}


		///
		/// Virtual Line Color Node Property Default Getter
		/// (Overridden by concrete class)
		///
		ColorNode ModelObject::lineColorNode() const
		{
			return ColorNode( QColor::fromRgba(0x00000000) );
		}


		///
		/// Virtual Line Color Node Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setLineColorNode( const ColorNode &value )
		{
			// empty
		}
		

		///
		/// Virtual Fill Color Node Property Default Getter
		/// (Overridden by concrete class)
		///
		ColorNode ModelObject::fillColorNode() const
		{
			return ColorNode( QColor::fromRgba(0x00000000) );
		}


		///
		/// Virtual Fill Color Node Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setFillColorNode( const ColorNode &value )
		{
			// empty
		}
		

		///
		/// Virtual Barcode Data Property Default Getter
		/// (Overridden by concrete class)
		///
		QString ModelObject::bcData() const
		{
			return QString();
		}


		///
		/// Virtual Barcode Data Node Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setBcData( const QString& value )
		{
			// empty
		}
		

		///
		/// Virtual Barcode Text Flag Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::bcTextFlag() const
		{
			return false;
		}


		///
		/// Virtual Barcode Text Flag Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setBcTextFlag( bool value )
		{
			// empty
		}


		///
		/// Virtual Barcode Checksum Flag Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::bcChecksumFlag() const
		{
			return false;
		}


		///
		/// Virtual Barcode Checksum Flag Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setBcChecksumFlag( bool value )
		{
			// empty
		}


		///
		/// Virtual Barcode Color Node Property Default Getter
		/// (Overridden by concrete class)
		///
		ColorNode ModelObject::bcColorNode() const
		{
			return ColorNode( QColor::fromRgba(0x00000000) );
		}


		///
		/// Virtual Barcode Color Node Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setBcColorNode( const ColorNode &value )
		{
			// empty
		}
		

		///
		/// Virtual Barcode Style Property Default Getter
		/// (Overridden by concrete class)
		///
		barcode::Style ModelObject::bcStyle() const
		{
			return barcode::Style();
		}


		///
		/// Virtual Barcode Style Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setBcStyle( const barcode::Style &value )
		{
			// empty
		}
		

		///
		/// Virtual Barcode Format Digits Property Default Getter
		/// (Overridden by concrete class)
		///
		int ModelObject::bcFormatDigits() const
		{
			return 0;
		}


		///
		/// Virtual Barcode Format Digits Property Default Setter
		/// (Overridden by concrete class)
		///
		void ModelObject::setBcFormatDigits( int value )
		{
			// empty
		}


		///
		/// Virtual Can Text Capability Read-Only Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::canText() const
		{
			return false;
		}


		///
		/// Virtual Can Fill Capability Read-Only Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::canFill() const
		{
			return false;
		}


		///
		/// Virtual Can Line Color Capability Read-Only Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::canLineColor() const
		{ 
			return false;
		}


		///
		/// Virtual Can Line Width Capability Read-Only Property Default Getter
		/// (Overridden by concrete class)
		///
		bool ModelObject::canLineWidth() const
		{
			return false;
		}


		///
		/// Set Absolute Position
		///
		void ModelObject::setPosition( const Distance& x0,
		                               const Distance& y0 )
		{
			if ( ( mX0 != x0 ) || ( mY0 != y0 ) )
			{
				mX0 = x0;
				mY0 = y0;

				emit moved();
			}
		}


		///
		/// Set Relative Position
		///
		void ModelObject::setPositionRelative( const Distance& dx,
		                                       const Distance& dy )
		{
			if ( ( dx != 0 ) || ( dy != 0 ) )
			{
				mX0 += dx;
				mY0 += dy;

				emit moved();
			}
		}


		///
		/// Get Size
		///
		Size ModelObject::size() const
		{
			return Size( mW, mH );
		}


		///
		/// Set Size
		///
		void ModelObject::setSize( const Distance& w,
		                           const Distance& h )
		{
			mW = w;
			mH = h;

			sizeUpdated();
			emit changed();
		}


		///
		/// Set Size
		///
		void ModelObject::setSize( const Size& size )
		{
			mW = size.w();
			mH = size.h();

			sizeUpdated();
			emit changed();
		}


		///
		/// Set Size (But Maintain Current Aspect Ratio)
		///
		void ModelObject::setSizeHonorAspect( const Distance& w,
		                                      const Distance& h )
		{
			double aspectRatio = mH / mW;
			Distance wNew = w;
			Distance hNew = h;
		
			if ( h > (w*aspectRatio) )
			{
				hNew = w*aspectRatio;
			}
			else
			{
				wNew = h/aspectRatio;
			}

			setSize( wNew, hNew );
		}


		///
		/// Set Width (But Maintain Current Aspect Ratio)
		///
		void ModelObject::setWHonorAspect( const Distance& w )
		{
			double aspectRatio = mH / mW;
			Distance h = w * aspectRatio;

			if ( ( mW != w ) || ( mH != h ) )
			{
				mW = w;
				mH = h;

				sizeUpdated();
				emit changed();
			}
		}


		///
		/// Set Height (But Maintain Current Aspect Ratio)
		///
		void ModelObject::setHHonorAspect( const Distance& h )
		{
			double aspectRatio = mH / mW;
			Distance w = h / aspectRatio;

			if ( ( mW != w ) || ( mH != h ) )
			{
				mW = w;
				mH = h;

				sizeUpdated();
				emit changed();
			}
		}


		///
		/// Get Extent of Bounding Box
		///
		Region ModelObject::getExtent()
		{
			QPointF a1( (   - lineWidth()/2).pt(), (   - lineWidth()/2).pt() );
			QPointF a2( (mW + lineWidth()/2).pt(), (   - lineWidth()/2).pt() );
			QPointF a3( (mW + lineWidth()/2).pt(), (mH + lineWidth()/2).pt() );
			QPointF a4( (   - lineWidth()/2).pt(), (mH + lineWidth()/2).pt() );

			a1 = mMatrix.map( a1 );
			a2 = mMatrix.map( a2 );
			a3 = mMatrix.map( a3 );
			a4 = mMatrix.map( a4 );

			Region region;
			region.setX1( min( a1.x(), min( a2.x(), min( a3.x(), a4.x() ) ) ) + mX0 );
			region.setY1( min( a1.y(), min( a2.y(), min( a3.y(), a4.y() ) ) ) + mY0 );
			region.setX2( max( a1.x(), max( a2.x(), max( a3.x(), a4.x() ) ) ) + mX0 );
			region.setY2( max( a1.y(), max( a2.y(), max( a3.y(), a4.y() ) ) ) + mY0 );

			return region;
		}


		///
		/// Rotate Object
		///
		void ModelObject::rotate( double thetaDegs )
		{
			if ( thetaDegs != 0 )
			{
				QTransform m;
				m.rotate( thetaDegs );
				mMatrix *= m;

				emit changed();
			}
		}


		///
		/// Flip Object Horizontally
		///
		void ModelObject::flipHoriz()
		{
			QTransform m;
			m.scale( -1, 1 );
			mMatrix *= m;

			emit changed();
		}


		///
		/// Flip Object Vertically
		///
		void ModelObject::flipVert()
		{
			QTransform m;
			m.scale( 1, -1 );
			mMatrix *= m;

			emit changed();
		}


		///
		/// Is this object located at x,y?
		///
		bool ModelObject::isLocatedAt( double          scale,
		                               const Distance& x,
		                               const Distance& y ) const
		{
			QPointF p( x.pt(), y.pt() );

			/*
			 * Change point to object relative coordinates
			 */
			p -= QPointF( mX0.pt(), mY0.pt() ); // Translate point to x0,y0
			p = mMatrix.inverted().map( p );

			if ( hoverPath( scale ).contains( p ) )
			{
				return true;
			}
			else if ( isSelected() && mOutline )
			{
				if ( mOutline->hoverPath( scale ).contains( p ) )
				{
					return true;
				}
			}

			return false;
		}


		///
		/// Is one of this object's handles locate at x,y?  If so, return it.
		///
		Handle* ModelObject::handleAt( double          scale,
		                               const Distance& x,
		                               const Distance& y ) const
		{
			if ( mSelectedFlag )
			{
				QPointF p( x.pt(), y.pt() );
				p -= QPointF( mX0.pt(), mY0.pt() ); // Translate point to x0,y0

				foreach ( Handle* handle, mHandles )
				{
					QPainterPath handlePath = mMatrix.map( handle->path( scale ) );
					if ( handlePath.contains( p ) )
					{
						return handle;
					}
				}
			}

			return nullptr;
		}


		///
		/// Draw object + shadow
		///
		void ModelObject::draw( QPainter*      painter,
		                        bool           inEditor,
		                        merge::Record* record,
		                        Variables*     variables ) const
		{
			painter->save();
			painter->translate( mX0.pt(), mY0.pt() );

			if ( mShadowState )
			{
				painter->save();
				painter->translate( mShadowX.pt(), mShadowY.pt() );
				painter->setTransform( mMatrix, true );
				drawShadow( painter, inEditor, record, variables );
				painter->restore();
			}

			painter->setTransform( mMatrix, true );
			drawObject( painter, inEditor, record, variables );

			painter->restore();
		}


		///
		/// Draw selection highlights
		///
		void ModelObject::drawSelectionHighlight( QPainter* painter, double scale ) const
		{
			painter->save();

			painter->translate( mX0.pt(), mY0.pt() );
			painter->setTransform( mMatrix, true );

			if ( mOutline )
			{
				mOutline->draw( painter );
			}

			foreach( Handle* handle, mHandles )
			{
				handle->draw( painter, scale );
			}
		
			painter->restore();
		}


		///
		/// Default sizeUpdated implementation.
		///
		void ModelObject::sizeUpdated()
		{
			// empty
		}

	}
}