//#include <math.h>

#include "linkablemapobj.h"

#include "branchobj.h"

#include "mapeditor.h"

#include "version.h"

/////////////////////////////////////////////////////////////////

// LinkableMapObj

/////////////////////////////////////////////////////////////////

LinkableMapObj::LinkableMapObj():MapObj()

{

  //  cout << "Const LinkableMapObj ()\n";

    init ();

}

LinkableMapObj::LinkableMapObj(QCanvas* c) :MapObj(c)

{

//    cout << "Const LinkableMapObj\n";

    init ();

}

LinkableMapObj::LinkableMapObj (LinkableMapObj* lmo) : MapObj (lmo->canvas)

{

    copy (lmo);

}

LinkableMapObj::~LinkableMapObj()

{

    delete (bottomline);

    delete (selbox);

	delete (frame);

	delLink();

}

void LinkableMapObj::delLink()

{

	switch (style)

	{

		case StyleLine:

			delete (l);

			break;

		case StyleParabel:

			segment.clear();

			break;

		case StylePolyLine:

			delete (p);

			delete (l);

			break;

		case StylePolyParabel:

			delete (p);

			segment.clear();

			break;

		default:

			break;

	}		

}

void LinkableMapObj::init ()

{

    depth=-1;	

    childObj=NULL;

    parObj=NULL;

    parObjTmpBuf=NULL;

    parPos=QPoint(0,0);

    childPos=QPoint(0,0);

	link2ParPos=false;

    l=NULL;

    orientation=OrientUndef;

    linkwidth=20;		

	thickness_start=8;

    style=StyleUndef;

	linkpos=LinkBottom;

    segment.setAutoDelete (TRUE);

    arcsegs=13;

	QPointArray pa(arcsegs*2+2);

    bottomline=new QCanvasLine(canvas);

    bottomline->setPen( QPen(linkcolor, 1) );

    bottomline->setZ(Z_LINK);

    bottomline->show();

    // Prepare showing the selection of a MapObj

    selbox = new QCanvasRectangle (canvas);

    selbox->setZ(Z_SELBOX);

    selbox->setBrush( QColor(255,255,0) );

    selbox->setPen( QPen(QColor(255,255,0) ));

    selbox->hide();

    selected=false;

	// initialize frame

	frame = new FrameObj (canvas);

	repositionRequest=false;

}

void LinkableMapObj::copy (LinkableMapObj* other)

{

    MapObj::copy(other);

	bboxTotal=other->bboxTotal;

//    linkwidth=other->linkwidth;		

    setLinkStyle(other->style);

    setLinkColor (other->linkcolor);

}

void LinkableMapObj::setChildObj(LinkableMapObj* o)

{

    childObj=o;

}

void LinkableMapObj::setParObj(LinkableMapObj* o)

{

    parObj=o;

	mapEditor=parObj->getMapEditor();

}

void LinkableMapObj::setParObjTmp(LinkableMapObj*,QPoint,int)

{

}

void LinkableMapObj::unsetParObjTmp()

{

}

LinkStyle LinkableMapObj::getDefLinkStyle ()

{

	LinkStyle ls=mapEditor->getLinkStyle();

	switch (ls)

	{

		case StyleLine: 

			return ls;

			break;

		case StyleParabel:

			return ls;

			break;

		case StylePolyLine:	

			if (depth>1)

				return StyleLine;

			else	

				return ls;

			break;

		case StylePolyParabel:	

			if (depth>1)

				return StyleParabel;

			else	

				return ls;

			break;

		default: 

			break;	

	}	

	return StyleUndef;

}

void LinkableMapObj::setLinkStyle(LinkStyle newstyle)

{

	//if (newstyle=style) return;

	delLink();

	style=newstyle;

    if (childObj!=NULL && parObj != NULL)

    {

		int i;

		QCanvasLine* cl;

		switch (style)

		{

			case StyleUndef:

				bottomline->hide();

				break;

			case StyleLine: 

				l = new QCanvasLine(canvas);

				l->setPen( QPen(linkcolor, 1) );

				l->setZ(Z_LINK);

				if (visible)

					l->show();

				else

					l->hide();

				break;

			case StyleParabel:

				for (i=0;i<arcsegs;i++)

				{

					cl = new QCanvasLine(canvas);

					cl->setPen( QPen(linkcolor, 1) );

					cl->setPoints( 0,0,i*10,100);

					cl->setZ(Z_LINK);

					if (visible)

						cl->show();

					else

						cl->hide();

					segment.append(cl);

				}

				pa0.resize (arcsegs+1);

				break;

			case StylePolyLine:	

				p = new QCanvasPolygon(canvas);

				p->setBrush( linkcolor );

				p->setZ(Z_LINK);

				if (visible)

					p->show();

				else

					p->hide();

				pa0.resize (3);

				// TODO

				// a bit awkward: draw the lines additionally to polygon, to avoid

				// missing pixels, when polygon is extremly flat

				l = new QCanvasLine(canvas);

				l->setPen( QPen(linkcolor, 1) );

				l->setZ(Z_LINK);

				if (visible)

					l->show();

				else

					l->hide();

				break;

			case StylePolyParabel:	

				p = new QCanvasPolygon(canvas);

				p->setBrush( linkcolor );

				p->setZ(Z_LINK);

				if (visible)

					p->show();

				else

					p->hide();

				pa0.resize (arcsegs*2+2);

				pa1.resize (arcsegs+1);

				pa2.resize (arcsegs+1);

				// TODO

				// a bit awkward: draw the lines additionally 

				// to polygon, to avoid missing pixels, 

				// if polygon is extremly flat

				for (i=0;i<arcsegs;i++)

				{

					cl = new QCanvasLine(canvas);

					cl->setPen( QPen(linkcolor, 1) );

					cl->setPoints( 0,0,i*10,100);

					cl->setZ(Z_LINK);

					if (visible)

						cl->show();

					else

						cl->hide();

					segment.append(cl);

				}

				break;

			default: 

				break;	

		}	

		updateLink();

	} else

	{

		qWarning ("Error: ChildObj or parObj == NULL in LinkableMapObj::setLinkStyle\n");

	}

}

LinkStyle LinkableMapObj::getLinkStyle()

{

	return style;

}

void LinkableMapObj::setLinkPos(LinkPos lp)

{

	linkpos=lp;

}

LinkPos LinkableMapObj::getLinkPos()

{

	return linkpos;

}

void LinkableMapObj::setLinkColor()

{

	// Overloaded in BranchObj and childs

	// here only set default color

	setLinkColor (mapEditor->getDefLinkColor());

}

void LinkableMapObj::setLinkColor(QColor col)

{

	linkcolor=col;

    bottomline->setPen( QPen(linkcolor, 1) );

	QCanvasLine *cl;

	switch (style)

	{

		case StyleLine:

			l->setPen( QPen(col,1));

			break;	

		case StyleParabel:	

			for (cl=segment.first(); cl; cl=segment.next() )

				cl->setPen( QPen(col,1));

			break;

		case StylePolyLine:

			p->setBrush( QBrush(col));

			l->setPen( QPen(col,1));

			break;

		case StylePolyParabel:	

			p->setBrush( QBrush(col));

			for (cl=segment.first(); cl; cl=segment.next() )

				cl->setPen( QPen(col,1));

			break;

		default:

			break;

	} // switch (style)	

	updateLink();

}

QColor LinkableMapObj::getLinkColor()

{

	return linkcolor;

}

FrameType LinkableMapObj::getFrameType()

{

	return frame->getFrameType();

}

void LinkableMapObj::setFrameType(const FrameType &t)

{

	frame->setFrameType(t);

	calcBBoxSize();

	positionBBox();

	requestReposition();

}

void LinkableMapObj::setFrameType(const QString &t)

{

	frame->setFrameType(t);

	calcBBoxSize();

	positionBBox();

	requestReposition();

}

void LinkableMapObj::setVisibility (bool v)

{

	MapObj::setVisibility (v);

	if (visible) 

	{

		bottomline->show();

		// FIXME lines and segments should be done in LMO?

		if (style==StyleLine && l) 

		{

			l->show();

		} else

		{

			QCanvasLine* cl;

			for (cl=segment.first(); cl; cl=segment.next() )

				cl->show();

		} 

	} else 

	{

		bottomline->hide();

		if (style==StyleLine && l) 

		{

			l->hide();

		} else

		{

			QCanvasLine* cl;

			for (cl=segment.first(); cl; cl=segment.next() )

				cl->hide();

		} 

	}	

}

void LinkableMapObj::updateLink()

{

    // needs:

    //	childPos of parent

    //	orient   of parent

    //	style

    // 

    // sets:

    //	orientation

    //	childPos

    //	parPos

	//  offset

    //	drawing of the link itself

	// updateLink is called from move, but called from constructor we don't

	// have parents yet...

	if (style==StyleUndef) return;	

	if (frame->getFrameType() == NoFrame)

		linkpos=LinkBottom;

	else	

		linkpos=LinkMiddle;

	switch (linkpos)

	{

		case LinkMiddle:

			offset=bbox.height() /2;

			break;

		default :

			offset=bbox.height()-1;			// draw link to bottom of bbox

			break;

	}

    double p2x,p2y;								// Set P2 Before setting

	if (!link2ParPos)

	{

		p2x=QPoint( parObj->getChildPos() ).x();	// P1, we have to look at

		p2y=QPoint( parObj->getChildPos() ).y();	// orientation

	} else	

	{

		p2x=QPoint( parObj->getParPos() ).x();	

		p2y=QPoint( parObj->getParPos() ).y();

	} 

	LinkOrient orientOld=orientation;

    // Set orientation, first look for orientation of parent

    if (parObj->getOrientation() != OrientUndef ) 

		// use the orientation of the parent:

		orientation=parObj->getOrientation();

    else

    {

		// calc orientation depending on position rel to mapCenter

		if (absPos.x() < QPoint(parObj->getChildPos() ).x() )

			orientation=OrientLeftOfCenter; 

		else

			orientation=OrientRightOfCenter;

    }

	if ((orientation!=orientOld) && (orientOld!= OrientUndef))

	{

		// Orientation just changed. Reorient this subbranch, because move is called

		// before updateLink => Position is still the old one, which could lead to 

		// linking of subranch to itself => segfault

		//

		// Also possible: called in BranchObj::init(), then orientOld==OrientUndef,

		// no need to reposition now

		reposition();

	}

    if (orientation==OrientLeftOfCenter )

    {

		childPos=QPoint (absPos.x(),absPos.y()+offset);

		parPos=QPoint (absPos.x()+ bbox.width(), absPos.y() + offset );

    } else

    {

		childPos=QPoint (absPos.x()+ bbox.width(), absPos.y() + offset ); 

		parPos=QPoint (absPos.x(),absPos.y()+offset);

    }

	/* FIXME

		cout << "      LMO::updateLink   absPos="<<absPos<<endl;

		cout << "      LMO::updateLink childPos="<<childPos<<endl;

		cout << "      LMO::updateLink   parPos="<<parPos<<endl;

		cout << "      LMO::updateLink   offset="<<offset<<endl;

		cout << "      LMO::updateLink   bbox.w="<<bbox.width()<<endl;

		cout << "      LMO::updateLink   bbox.h="<<bbox.height()<<endl;

	*/	

	double p1x=parPos.x();	// Link is drawn from P1 to P2

	double p1y=parPos.y();

	double vx=p2x - p1x;	// V=P2-P1

	double vy=p2y - p1y;

	// Draw the horizontal line below heading (from ChildPos to ParPos)

	bottomline->setPoints (lrint(childPos.x()),

		lrint(childPos.y()),

		lrint(p1x),

		lrint(p1y) );

	double a;	// angle

	if (vx > -0.000001 && vx < 0.000001)

		a=M_PI_2;

	else

		a=atan( vy / vx );

	// "turning point" for drawing polygonal links

	QPoint tp (-lrint(sin (a)*thickness_start), lrint(cos (a)*thickness_start));	

	QCanvasLine *cl;

	int i;

    // Draw the link

	switch (style)

	{

		case StyleLine:

			l->setPoints( lrint (parPos.x()),

				lrint(parPos.y()),

				lrint(p2x),

				lrint(p2y) );

			break;	

		case StyleParabel:	

			parabel (pa0, p1x,p1y,p2x,p2y);

			i=0;

			for (cl=segment.first(); cl; cl=segment.next() )

			{	

				cl->setPoints( pa0.point(i).x(), pa0.point(i).y(),pa0.point(i+1).x(),pa0.point(i+1).y());

				i++;

			}

			break;

		case StylePolyLine:

			pa0[0]=QPoint (lrint(p2x+tp.x()), lrint(p2y+tp.y()));

			pa0[1]=QPoint (lrint(p2x-tp.x()), lrint(p2y-tp.y()));

			pa0[2]=QPoint (lrint (parPos.x()), lrint(parPos.y()) );

			p->setPoints (pa0);

			// here too, draw line to avoid missing pixels

			l->setPoints( lrint (parPos.x()),

				lrint(parPos.y()),

				lrint(p2x),

				lrint(p2y) );

			break;

		case StylePolyParabel:	

			parabel (pa1, p1x,p1y,p2x+tp.x(),p2y+tp.y());

			parabel (pa2, p1x,p1y,p2x-tp.x(),p2y-tp.y());

			for (i=0;i<=arcsegs;i++)

			{

				// Combine the arrays to a single one

				pa0[i]=pa1[i];

				pa0[i+arcsegs+1]=pa2[arcsegs-i];

			}	

			p->setPoints (pa0);

			i=0;

			for (cl=segment.first(); cl; cl=segment.next() )

			{	

				cl->setPoints( pa1.point(i).x(), pa1.point(i).y(),pa1.point(i+1).x(),pa1.point(i+1).y());

				i++;

			}

			break;

		default:

			break;

	} // switch (style)	

}

LinkableMapObj* LinkableMapObj::getChildObj()

{

    return childObj;

}

LinkableMapObj* LinkableMapObj::getParObj()

{

    return parObj;

}

QPoint LinkableMapObj::getChildPos()

{

    return childPos;

}

QPoint LinkableMapObj::getParPos()

{

    return parPos;

}

QPoint LinkableMapObj::getRelPos()

{

	if (!parObj) return QPoint (0,0);

    return QPoint(

		absPos.x() - parObj->x(),

		absPos.y() - parObj->y()

	);

}

LinkOrient LinkableMapObj::getOrientation()

{

    return orientation;

}

int LinkableMapObj::getDepth()

{

    return depth;

}

void LinkableMapObj::setMapEditor (MapEditor *me)

{

	mapEditor=me;

}

MapEditor* LinkableMapObj::getMapEditor ()

{

	return mapEditor;

}

QPoint LinkableMapObj::getRandPos()

{

	// Choose a random position with given distance to parent:

	double a=rand()%360 * 2 * M_PI / 360;

    return QPoint ( (int)( + 150*cos (a)),

                    (int)( + 150*sin (a)));

}

void LinkableMapObj::alignRelativeTo (QPoint ref)

{

}

void LinkableMapObj::reposition()

{

	if (depth==0)

	{

		// only calculate the sizes once. If the deepest LMO changes its height,

		// all upper LMOs have to change, too.

		calcBBoxSizeWithChilds();

	    alignRelativeTo ( QPoint (absPos.x(),

							absPos.y()-(bboxTotal.height()-bbox.height())/2) );

	} else

	{

		// This is only important for moving branches:

		// For editing a branch it isn't called...

	    alignRelativeTo ( QPoint (absPos.x(),

							absPos.y()-(bboxTotal.height()-bbox.height())/2) );

	}

}

void LinkableMapObj::requestReposition()

{

	if (!repositionRequest)

	{

		// Pass on the request to parental objects, if this hasn't

		// been done yet

		repositionRequest=true;

		if (parObj) parObj->requestReposition();

	}

}

void LinkableMapObj::forceReposition()

{

	// Sometimes a reposition has to be done immediatly: For example

	// if the note editor flag changes, there is no user event in mapeditor

	// which could collect requests for a reposition.

	// Then we have to call forceReposition()

	// But no rule without exception: While loading a map or undoing it,

	// we want to block expensive repositioning, but just do it once at

	// the end, thus check first:

	if (mapEditor->blockReposition()) return;

	// Pass on the request to parental objects, if this hasn't been done yet

	if (parObj) 

		parObj->forceReposition(); 

	else 

		reposition(); 

}

bool LinkableMapObj::repositionRequested()

{

	return repositionRequest;

}

void LinkableMapObj::setSelBox()

{

    selbox->setX (bbox.x() );

    selbox->setY (bbox.y() );

    selbox->setSize (bbox.width(), bbox.height() );

}

void LinkableMapObj::select()

{

	setSelBox();

    selected=true;

    selbox->show();

}

void LinkableMapObj::unselect()

{

    selected=false;

    selbox->hide();

}

void LinkableMapObj::parabel (QPointArray &ya, double p1x, double p1y, double p2x, double p2y)

{

	double vx=p2x - p1x;	// V=P2-P1

	double vy=p2y - p1y;

	double dx;				// delta x during calculation of parabel

	double pnx;				// next point

	double pny;

	double m;

	if (vx > -0.0001 && vx < 0.0001)

		m=0;

	else	

		m=(vy / (vx*vx));

	dx=vx/(arcsegs);

	int i;

	ya.setPoint (0,QPoint (lrint(p1x),lrint(p1y)));

	for (i=1;i<=arcsegs;i++)

	{	

		pnx=p1x+dx;

		pny=m*(pnx-parPos.x())*(pnx-parPos.x())+parPos.y();

		ya.setPoint (i,QPoint (lrint(pnx),lrint(pny)));

		p1x=pnx;

		p1y=pny;

	}	

}