/*  LabelModelObject.cpp
 *
 *  Copyright (C) 2013  Jim 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 "LabelModelObject.h"

#include <QFont>
#include <algorithm>
#include <cmath>
#include <QtDebug>

#include "ColorNode.h"
#include "TextNode.h"
#include "BarcodeStyle.h"
#include "LabelRegion.h"
#include "MergeRecord.h"


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


///
/// Constructor
///
LabelModelObject::LabelModelObject( QObject *parent = 0 ) : QObject(parent)
{
	mId = msNextId++;

	mX0 = 0;
	mY0 = 0;
	mW  = 0;
	mH  = 0;
	mMatrix = QMatrix();

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

	mSelectedFlag = false;

	mOutline = 0;
}


///
/// Destructor
///
LabelModelObject::~LabelModelObject()
{
}


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


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


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


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


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


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

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


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

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


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

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


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


///
/// Matrix Property Getter
///
QMatrix LabelModelObject::matrix() const
{
	return mMatrix;
}


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


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


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


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


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

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


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

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


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

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


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

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


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


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


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


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


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


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


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


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


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


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


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

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


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


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


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


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


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


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


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

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


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


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


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

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


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

///
/// Virtual Barcode Data Node Property Default Getter
/// (Overridden by concrete class)
///
TextNode LabelModelObject::bcDataNode() const
{
	return TextNode();
}


///
/// Virtual Barcode Data Node Property Default Setter
/// (Overridden by concrete class)
///
void LabelModelObject::setBcDataNode( const TextNode &value )
{
}
		

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


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


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


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


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


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

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


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

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


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


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


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


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


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


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

		emit moved();
	}
}


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

		emit moved();
	}
}


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

	emit changed();
}


///
/// Set Size (But Maintain Current Aspect Ratio)
///
void LabelModelObject::setSizeHonorAspect( const glabels::Distance& w,
					   const glabels::Distance& h )
{
	double aspectRatio = mH / mW;
	glabels::Distance wNew = w;
	glabels::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 LabelModelObject::setWHonorAspect( const glabels::Distance& w )
{
	double aspectRatio = mH / mW;
	glabels::Distance h = w * aspectRatio;

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

		emit changed();
	}
}


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

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

		emit changed();
	}
}


///
/// Get Extent of Bounding Box
///
LabelRegion LabelModelObject::getExtent()
{
	using std::min;
	using std::max;

	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 );

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

	return region;
}


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

		emit changed();
	}
}


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

	emit changed();
}


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

	emit changed();
}


///
/// Is this object located at x,y?
///
bool LabelModelObject::isLocatedAt( double                   scale,
				    const glabels::Distance& x,
				    const glabels::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* LabelModelObject::handleAt( double                   scale,
				    const glabels::Distance& x,
				    const glabels::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 0;
}


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

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

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

	painter->restore();
}


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

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

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

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