#include "xml-vym.h"

#include <QMessageBox>

#include <QColor>

#include <QTextStream>

#include <iostream>

#include <typeinfo>

#include "misc.h"

#include "settings.h"

#include "linkablemapobj.h"

#include "version.h"

static BranchObj *lastBranch;

static FloatObj *lastFloat;

static OrnamentedObj *lastOO;

extern Settings settings;

extern QString vymVersion;

bool parseVYMHandler::startDocument()

{

    errorProt = "";

    state = StateInit;

    laststate = StateInit;

	stateStack.clear();

	stateStack.append(StateInit);

	htmldata="";

	isVymPart=false;

    return true;

}

bool parseVYMHandler::startElement  ( const QString&, const QString&,

                    const QString& eName, const QXmlAttributes& atts ) 

{

    QColor col;

	/* Testing

	cout << "startElement <"<< qPrintable(eName)

		<<">  state="<<state 

		<<"  laststate="<<stateStack.last()

		<<"   loadMode="<<loadMode

		<<"       line="<<QXmlDefaultHandler::lineNumber()

		<<endl;

	*/	

	stateStack.append (state);	

    if ( state == StateInit && (eName == "vymmap")  ) 

	{

        state = StateMap;

		if (loadMode==NewMap )

		{

			// Create mapCenter

			model->clear();

			lastBranch=model->first();	// avoid empty pointer

			if (!atts.value( "author").isEmpty() )

				model->setAuthor(atts.value( "author" ) );

			if (!atts.value( "comment").isEmpty() )

				model->setComment (atts.value( "comment" ) );

			if (!atts.value( "backgroundColor").isEmpty() )

			{

				col.setNamedColor(atts.value("backgroundColor"));

				model->getScene()->setBackgroundBrush(col);

			}	    

			if (!atts.value( "selectionColor").isEmpty() )

			{

				col.setNamedColor(atts.value("selectionColor"));

				model->setSelectionColor(col);

			}	    

			if (!atts.value( "linkColorHint").isEmpty() ) 

			{

				if (atts.value("linkColorHint")=="HeadingColor")

					model->setMapLinkColorHint(LinkableMapObj::HeadingColor);

				else

					model->setMapLinkColorHint(LinkableMapObj::DefaultColor);

			}

			if (!atts.value( "linkStyle").isEmpty() ) 

				model->setMapLinkStyle(atts.value("linkStyle"));

			if (!atts.value( "linkColor").isEmpty() ) 

			{

				col.setNamedColor(atts.value("linkColor"));

				model->setMapDefLinkColor(col);

			}	

			if (!atts.value( "defXLinkColor").isEmpty() ) 

			{

				col.setNamedColor(atts.value("defXLinkColor"));

				model->setMapDefXLinkColor(col);

			}	

			if (!atts.value( "defXLinkWidth").isEmpty() ) 

				model->setMapDefXLinkWidth(atts.value("defXLinkWidth").toInt ());

		}	

		// Check version

		if (!atts.value( "version").isEmpty() ) 

		{

			if (!checkVersion(atts.value("version")))

				QMessageBox::warning( 0, "Warning: Version Problem" ,

				   "<h3>Map is newer than VYM</h3>"

				   "<p>The map you are just trying to load was "

				   "saved using vym " +atts.value("version")+". "

				   "The version of this vym is " + vymVersion + 

				   ". If you run into problems after pressing "

				   "the ok-button below, updating vym should help.");

			else	   

				model->setVersion(atts.value( "version" ));

		}

	} else if ( eName == "select" && state == StateMap ) 

	{

		state=StateMapSelect;

	} else if ( eName == "setting" && state == StateMap ) 

	{

		state=StateMapSetting;

		if (loadMode==NewMap)

			readSettingAttr (atts);

	} else if ( eName == "mapcenter" && state == StateMap ) 

	{

		state=StateMapCenter;

		if (loadMode==NewMap)

		{	

			// Really use the found mapcenter as MCO in a new map

			model->createMapCenter(); 

			lastBranch=model->getSelectedBranch();

		} else

		{

			// Treat the found mapcenter as a branch 

			// in an existing map

			LinkableMapObj* lmo=model->getSelection();

			if (lmo && ( (typeid(*lmo) == typeid(BranchObj) ) 

			        || (typeid(*lmo) == typeid(MapCenterObj) ) ) )

			{

				lastBranch=(BranchObj*)lmo;

				if (loadMode==ImportAdd)

				{

					model->createBranch();

					lastBranch=model->getSelectedBranch();

				} else

					lastBranch->clear();

			} else

				return false;

		}

		readBranchAttr (atts);

	} else if ( 

		(eName == "standardflag" ||eName == "standardFlag") && 

		(state == StateMapCenter || state==StateBranch)) 

	{

		state=StateStandardFlag;

	} else if ( eName == "heading" && (state == StateMapCenter||state==StateBranch)) 

	{

		laststate=state;

		state=StateHeading;

		if (!atts.value( "textColor").isEmpty() ) 

		{

			col.setNamedColor(atts.value("textColor"));

			lastBranch->setColor(col );

		}	    

	} else if ( eName == "note" && 

				(state == StateMapCenter ||state==StateBranch))

	{	// only for backward compatibility (<1.4.6). Use htmlnote now.

		state=StateNote;

		if (!readNoteAttr (atts) ) return false;

	} else if ( eName == "htmlnote" && state == StateMapCenter) 

	{

		laststate=state;

		state=StateHtmlNote;

    } else if ( eName == "floatimage" && 

				(state == StateMapCenter ||state==StateBranch)) 

	{

		state=StateFloatImage;

        lastBranch->addFloatImage();

		lastFloat=lastBranch->getLastFloatImage();

		if (!readFloatImageAttr(atts)) return false;

	} else if ( (eName == "branch"||eName=="floatimage") && state == StateMap) 

	{

		// This is used in vymparts, which have no mapcenter!

		isVymPart=true;

		LinkableMapObj* lmo=model->getSelection();

		if (!lmo)

		{

			// If a vym part is _loaded_ (not imported), 

			// selection==lmo==NULL

			// Treat it like ImportAdd then...

			loadMode=ImportAdd;

			lmo=model->first();		

		}	

		if (lmo && ( (typeid(*lmo) == typeid(BranchObj) ) 

				|| (typeid(*lmo) == typeid(MapCenterObj) ) ) )

		{

			lastBranch=(BranchObj*)(lmo);

			if (eName=="branch")

			{

				state=StateBranch;

				if (loadMode==ImportAdd)

				{

					model->createBranch();

					lastBranch=model->getSelectedBranch();

				} else

					lastBranch->clear();

				readBranchAttr (atts);

			} else if (eName=="floatimage")

			{

				state=StateFloatImage;

				lastBranch->addFloatImage();

				lastFloat=lastBranch->getLastFloatImage();

				if (!readFloatImageAttr(atts)) return false;

			} else return false;

		} else return false;

	} else if ( eName == "branch" && state == StateMapCenter) 

	{

		state=StateBranch;

		model->createBranch();

		lastBranch=model->getSelectedBranch();

		readBranchAttr (atts);

	} else if ( eName == "htmlnote" && state == StateBranch) 

	{

		laststate=state;

		state=StateHtmlNote;

		no.clear();

		if (!atts.value( "fonthint").isEmpty() ) 

			no.setFontHint(atts.value ("fonthint") );

	} else if ( eName == "frame" && (state == StateBranch||state==StateMapCenter)) 

	{

		laststate=state;

		state=StateFrame;

		if (!readFrameAttr(atts)) return false;

    } else if ( eName == "xlink" && state == StateBranch ) 

	{

		state=StateBranchXLink;

		if (!readXLinkAttr (atts)) return false;

    } else if ( eName == "branch" && state == StateBranch ) 

	{

		model->createBranch();

		lastBranch=model->getSelectedBranch();

		readBranchAttr (atts);

    } else if ( eName == "html" && state == StateHtmlNote ) 

	{

		state=StateHtml;

		htmldata="<"+eName;

		readHtmlAttr(atts);

		htmldata+=">";

    } else if ( state == StateHtml ) 

	{

		// accept all while in html mode,

		htmldata+="<"+eName;

		readHtmlAttr(atts);

		htmldata+=">";

    } else

        return false;   // Error

    return true;

}

bool parseVYMHandler::endElement  ( const QString&, const QString&, const QString &eName)

{

	/* Testing

	cout << "endElement </" <<qPrintable(eName)

		<<">  state=" <<state 

		<<"  laststate=" <<laststate

		<<"  stateStack="<<stateStack.last() 

		<<endl;

	*/

    switch ( state ) 

	{

        case StateBranch: 

			model->selectParent();

			lastBranch=model->getSelectedBranch();

            break;

        case StateHtml: 

			htmldata+="</"+eName+">";

			if (eName=="html")

			{

				state=StateHtmlNote;  

				htmldata.replace ("<br></br>","<br />");

				no.setNote (htmldata);

				lastBranch->setNote (no);

			}	

			break;

		default: 

			break;

    }  

	state=stateStack.takeLast();	

	return true;

}

bool parseVYMHandler::characters   ( const QString& ch)

{

	//cout << "characters \""<<ch<<"\"  state="<<state <<"  laststate="<<laststate<<endl;

	QString ch_org=quotemeta (ch);

    QString ch_simplified=ch.simplifyWhiteSpace();

    if ( ch_simplified.isEmpty() ) return true;

    switch ( state ) 

    {

        case StateInit: break;

        case StateMap: break; 

		case StateMapSelect:

			model->select(ch_simplified);

			break;

		case StateMapSetting:break;

        case StateMapCenter: break;

        case StateNote:

			lastBranch->setNote(ch_simplified);

			break;

        case StateBranch: break;

        case StateStandardFlag: 

            lastBranch->activateStandardFlag(ch_simplified); 

            break;

        case StateFloatImage: break;

        case StateHtmlNote: break;

        case StateHtml:

			htmldata+=ch_org;

			break;

        case StateHeading: 

            model->setHeading(ch_simplified);

            break;

        default: 

			return false;

    }

    return true;

}

QString parseVYMHandler::errorString() 

{

    return "the document is not in the VYM file format";

}

bool parseVYMHandler::readBranchAttr (const QXmlAttributes& a)

{

	lastOO=lastBranch;

	if (!readOOAttr(a)) return false;

	if (!a.value( "scrolled").isEmpty() )

		lastBranch->toggleScroll();

	if (!a.value( "frameType").isEmpty() ) 

		lastOO->setFrameType (a.value("frameType")); //Compatibility 1.8.1

	if (!a.value( "incImgV").isEmpty() ) 

	{	

		if (a.value("incImgV")=="true")

			lastBranch->setIncludeImagesVer(true);

		else	

			lastBranch->setIncludeImagesVer(false);

	}	

	if (!a.value( "incImgH").isEmpty() ) 

	{	

		if (a.value("incImgH")=="true")

			lastBranch->setIncludeImagesHor(true);

		else	

			lastBranch->setIncludeImagesHor(false);

	}	

	return true;	

}

bool parseVYMHandler::readFrameAttr (const QXmlAttributes& a)

{

	bool ok;

	int x;

	if (lastOO)

	{

		if (!a.value( "frameType").isEmpty() ) 

			lastOO->setFrameType (a.value("frameType"));

		if (!a.value( "penColor").isEmpty() ) 

			lastOO->setFramePenColor (a.value("penColor"));

		if (!a.value( "brushColor").isEmpty() ) 

			lastOO->setFrameBrushColor (a.value("brushColor"));

		if (!a.value( "padding").isEmpty() ) 

		{

			x=a.value("padding").toInt(&ok);

			if (ok) lastOO->setFramePadding(x);

		}	

		if (!a.value( "borderWidth").isEmpty() ) 

		{

			x=a.value("borderWidth").toInt(&ok);

			if (ok) lastOO->setFrameBorderWidth(x);

		}	

	}		

	return true;

}

bool parseVYMHandler::readOOAttr (const QXmlAttributes& a)

{

	if (lastOO)

	{

		bool okx,oky;

		float x,y;

		if (!a.value( "relPosX").isEmpty() ) 

		{

			if (!a.value( "relPosY").isEmpty() ) 

			{

				x=a.value("relPosX").toFloat (&okx);

				y=a.value("relPosY").toFloat (&oky);

				if (okx && oky  )

				{

					lastOO->setUseRelPos (true);

					lastOO->move2RelPos (x,y);

				}	

				else

					return false;   // Couldn't read relPos

			}           

		}           

		if (!a.value( "absPosX").isEmpty() && loadMode==NewMap ) 

		{

			if (!a.value( "absPosY").isEmpty() ) 

			{

				x=a.value("absPosX").toFloat (&okx);

				y=a.value("absPosY").toFloat (&oky);

				if (okx && oky  )

					lastOO->move(x,y);

				else

					return false;   // Couldn't read absPos

			}           

		}           

		if (!a.value( "id").isEmpty() ) 

			lastOO->setID (a.value ("id"));

		if (!a.value( "url").isEmpty() ) 

			lastOO->setURL (a.value ("url"));

		if (!a.value( "vymLink").isEmpty() ) 

			lastOO->setVymLink (a.value ("vymLink"));

		if (!a.value( "hideInExport").isEmpty() ) 

			if (a.value("hideInExport")=="true")

				lastOO->setHideInExport(true);

		if (!a.value( "hideLink").isEmpty()) 

		{

			if (a.value ("hideLink") =="true")

				lastOO->setHideLinkUnselected(true);

			else	

				lastOO->setHideLinkUnselected(false);

		}	

	}

	return true;	

}

bool parseVYMHandler::readNoteAttr (const QXmlAttributes& a)

{	// only for backward compatibility (<1.4.6). Use htmlnote now.

	no.clear();

	QString fn;

	if (!a.value( "href").isEmpty() ) 

	{

		// Load note

		fn=parseHREF(a.value ("href") );

		QFile file (fn);

		QString s;						// Reading a note

		if ( !file.open( QIODevice::ReadOnly) )

		{

			qWarning ("parseVYMHandler::readNoteAttr:  Couldn't load "+fn);

			return false;

		}	

		QTextStream stream( &file );

		QString lines;

		while ( !stream.atEnd() ) {

			lines += stream.readLine()+"\n"; 

		}

		file.close();

		lines ="<html><head><meta name=\"qrichtext\" content=\"1\" /></head><body>"+lines + "</p></body></html>";

		no.setNote (lines);

	}		

	if (!a.value( "fonthint").isEmpty() ) 

		no.setFontHint(a.value ("fonthint") );

	lastBranch->setNote(no);

	return true;

}

bool parseVYMHandler::readFloatImageAttr (const QXmlAttributes& a)

{

	lastOO=lastFloat;

	//if (!readOOAttr(a)) return false;

	if (!a.value( "useOrientation").isEmpty() ) 

	{

		if (a.value ("useOrientation") =="true")

			lastFloat->setUseOrientation (true);

		else	

			lastFloat->setUseOrientation (false);

	}	

	if (!a.value( "href").isEmpty() )

	{

		// Load FloatImage

		if (!lastFloat->load (parseHREF(a.value ("href") ) ))

		{

			QMessageBox::warning( 0, "Warning: " ,

				"Couldn't load float image\n"+parseHREF(a.value ("href") ));

			lastBranch->removeFloatImage(((FloatImageObj*)(lastFloat)));

			lastFloat=NULL;

			return true;

		}

	}	

	if (!a.value( "floatExport").isEmpty() ) 

	{

		// Only for compatibility. THis is not used since 1.7.11 

		if (a.value ("floatExport") =="true")

			lastFloat->setFloatExport(true);

		else	

			lastFloat->setFloatExport (false);

	}	

	if (!a.value( "zPlane").isEmpty() ) 

		lastFloat->setZValue (a.value("zPlane").toInt ());

    float x,y;

    bool okx,oky;

	if (!a.value( "relPosX").isEmpty() ) 

	{

		if (!a.value( "relPosY").isEmpty() ) 

		{

			// read relPos

			x=a.value("relPosX").toFloat (&okx);

			y=a.value("relPosY").toFloat (&oky);

			if (okx && oky) 

				{

					lastFloat->setRelPos (QPointF (x,y) );

					// make sure floats in mapcenter are repositioned to relative pos

					if (lastBranch->getDepth()==0) lastBranch->positionContents();

				}

			else

				// Couldn't read relPos

				return false;  

		}           

	}	

	if (!readOOAttr(a)) return false;

	if (!a.value ("orgName").isEmpty() )

	{

		((FloatImageObj*)(lastFloat))->setOriginalFilename (a.value("orgName"));

	}

	return true;

}

bool parseVYMHandler::readXLinkAttr (const QXmlAttributes& a)

{

	QColor col;

	bool okx;

	bool success=false;

	XLinkObj *xlo=new XLinkObj (model->getScene());

	if (!a.value( "color").isEmpty() ) 

	{

		col.setNamedColor(a.value("color"));

		xlo->setColor (col);

	}

	if (!a.value( "width").isEmpty() ) 

	{

		xlo->setWidth(a.value ("width").toInt (&okx, 10));

	}

	// Connecting by select string for compatibility with version < 1.8.76

	if (!a.value( "beginBranch").isEmpty() ) 

	{ 

		if (!a.value( "endBranch").isEmpty() ) 

		{

			LinkableMapObj *lmo=model->findObjBySelect (a.value( "beginBranch"));

			if (lmo && typeid (*lmo)==typeid (BranchObj))

			{

				xlo->setBegin ((BranchObj*)lmo);

				lmo=model->findObjBySelect (a.value( "endBranch"));

				if (lmo && typeid (*lmo)==typeid (BranchObj))

				{

					xlo->setEnd ((BranchObj*)(lmo));

					xlo->activate();

					success=true;

				}

			}

		}           

	}	

	// object ID is used starting in version 1.8.76

	if (!a.value( "beginID").isEmpty() ) 

	{ 

		if (!a.value( "endID").isEmpty() ) 

		{

			LinkableMapObj *lmo=model->findID (a.value( "beginID"));

			if (lmo && typeid (*lmo)==typeid (BranchObj))

			{

				xlo->setBegin ((BranchObj*)lmo);

				lmo=model->findID (a.value( "endID"));

				if (lmo && typeid (*lmo)==typeid (BranchObj))

				{

					xlo->setEnd ((BranchObj*)(lmo));

					xlo->activate();

					success=true;

				}

			}

		}           

	}	

	if (!success) delete (xlo);

	return true;	// xLinks can only be established at the "end branch", return true

}

bool parseVYMHandler::readHtmlAttr (const QXmlAttributes& a)

{

	for (int i=1; i<=a.count(); i++)

		htmldata+=" "+a.localName(i-1)+"=\""+a.value(i-1)+"\"";

	return true;

}

bool parseVYMHandler::readSettingAttr (const QXmlAttributes& a)

{

	if (!a.value( "key").isEmpty() ) 

	{

		if (!a.value( "value").isEmpty() ) 

			settings.setLocalEntry (model->getDestPath(), a.value ("key"), a.value ("value"));

		else

			return false;

	} else

		return false;

	return true;

}