#include "xml.h"

#include <qmessagebox.h>

#include <qcolor.h>

#include <qstylesheet.h>

#include <iostream>

#include "misc.h"

#include "settings.h"

#include "linkablemapobj.h"

#include "version.h"

static BranchObj *lastBranch;

static FloatObj *lastFloat;

extern Settings settings;

mapBuilderHandler::mapBuilderHandler() {}

mapBuilderHandler::~mapBuilderHandler() {}

QString mapBuilderHandler::errorProtocol() { return errorProt; }

bool mapBuilderHandler::startDocument()

{

    errorProt = "";

    state = StateInit;

    laststate = StateInit;

    branchDepth=0;

	htmldata="";

	isVymPart=false;

    return true;

}

QString mapBuilderHandler::parseHREF(QString href)

{

	QString type=href.section(":",0,0);

	QString path=href.section(":",1,1);

	if (!tmpDir.endsWith("/"))

		return tmpDir + "/" + path;

	else	

		return tmpDir + path;

}

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

                    const QString& eName, const QXmlAttributes& atts ) 

{

    QColor col;

	//cout << "startElement <"<<eName<<">  state="<<state <<"  laststate="<<laststate<<"   loadMode="<<loadMode<<endl;

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

	{

        state = StateMap;

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

		{

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

			if (!mc->checkVersion())

				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 " __VYM_VERSION__

				   ". If you run into problems after pressing "

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

		}

		if (loadMode==NewMap)

		{

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

			{

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

			}

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

			{

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

			}

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

			{

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

				mc->getCanvas()->setBackgroundColor(col);

			}	    

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

			{

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

					me->setLinkColorHint(HeadingColor);

				else

					me->setLinkColorHint(DefaultColor);

			}

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

			{

				QString s=atts.value("linkStyle");

				if (s=="StyleLine")

					me->setLinkStyle(StyleLine);

				else	

					if (s=="StyleParabel")

						me->setLinkStyle(StyleParabel);

					else	

						if (s=="StylePolyLine")

							me->setLinkStyle(StylePolyLine);

						else	

							me->setLinkStyle(StylePolyParabel);

			}	

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

			{

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

				me->setLinkColor(col);

			}	

		}	

	} 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

			lastBranch=mc;	// avoid empty pointer

		} else

		{

			// Treat the found mapcenter as a branch 

			// in an existing map

			LinkableMapObj* lmo=me->getSelection();

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

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

			{

				lastBranch=(BranchObj*)(lmo);

				if (loadMode==ImportAdd)

				{

					lastBranch->addBranch();

					lastBranch=lastBranch->getLastBranch();

				} else

					lastBranch->clear();

			} else

				return false;

		}

		readBranchAttr (atts);

	} else if ( (eName == "standardflag" ||eName == "standardFlag") && state == StateMapCenter) 

	{

		state=StateMapCenterStandardFlag;

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

	{

		state=StateMapCenterHeading;

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

		{

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

			lastBranch->setColor(col ,false );

		}	    

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

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

		state=StateMapCenterNote;

		if (!readNoteAttr (atts) ) return false;

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

	{

		laststate=state;

		state=StateHtmlNote;

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

	{

		state=StateMapCenterFloatImage;

        lastBranch->addFloatImage();

		lastFloat=lastBranch->getLastFloatImage();

		if (!readFloatImageAttr(atts)) return false;

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

	{

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

		isVymPart=true;

		state=StateBranch;

		LinkableMapObj* lmo=me->getSelection();

		if (!lmo)

		{

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

			// selection==lmo==NULL

			// Treat it like ImportAdd then...

			loadMode=ImportAdd;

			lmo=mc;

		}	

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

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

		{

			lastBranch=(BranchObj*)(lmo);

			if (loadMode==ImportAdd)

			{

				lastBranch->addBranch();

				lastBranch=lastBranch->getLastBranch();

			} else

				lastBranch->clear();

		} else

			return false;

		branchDepth=1;

		readBranchAttr (atts);

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

	{

		state=StateBranch;

		branchDepth=1;

		lastBranch->addBranch();

		lastBranch=lastBranch->getLastBranch();

		readBranchAttr (atts);

	} else if ( (eName=="standardflag" ||eName == "standardFlag") && state == StateBranch) 

	{

		state=StateBranchStandardFlag;

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

	{

		state=StateBranchHeading;

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

		{

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

			lastBranch->setColor(col ,false );

		}	    

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

	{

        state=StateBranchNote;

		if (!readNoteAttr (atts) ) return false;

	} 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 == "floatimage" && state == StateBranch ) 

	{

		state=StateBranchFloatImage;

        lastBranch->addFloatImage();

		lastFloat=lastBranch->getLastFloatImage();

		if (!readFloatImageAttr(atts)) return false;

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

	{

		state=StateBranchXLink;

		if (!readXLinkAttr (atts)) return false;

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

	{

        lastBranch->addBranch();

		lastBranch=lastBranch->getLastBranch();		

        branchDepth++;

		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 mapBuilderHandler::endElement  ( const QString&, const QString&, const QString &eName)

{

//	cout << "endElement </"<<eName<<">  state="<<state <<"  laststate="<<laststate<<endl;

    switch ( state ) 

	{

        case StateMapSelect: state=StateMap;  return true;

        case StateMapSetting: state=StateMap;  return true;

        case StateMapCenter: state=StateMap;  return true;

        case StateMapCenterStandardFlag: state=StateMapCenter;  return true;

        case StateMapCenterHeading: state=StateMapCenter;  return true;

        case StateMapCenterNote: state=StateMapCenter;  return true;

        case StateMapCenterFloatImage: state=StateMapCenter;  return true;

        case StateBranch: 

            if (branchDepth>1) 

			{

                branchDepth--;

                state=StateBranch;

            } else  

			{

                branchDepth=0;

				if (isVymPart)

					state=StateMap;

				else

					state=StateMapCenter;

            }   

			lastBranch=(BranchObj*)(lastBranch->getParObj());

             return true;

        case StateBranchStandardFlag: state=StateBranch;  return true;

        case StateBranchHeading: state=StateBranch;  return true;

        case StateBranchNote: state=StateBranch; return true;

        case StateBranchFloatImage: state=StateBranch;  return true;

        case StateBranchXLink: state=StateBranch;  return true;

        case StateHtmlNote: state=laststate; return true;

        case StateHtml: 

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

			if (eName=="html")

			{

				state=StateHtmlNote;  

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

				no.setNote (htmldata);

				lastBranch->setNote (no);

				return true;

			}	else

			{

				return true;

			}	

        case StateMap: state=StateInit;  return true;

        default : 

			// even for HTML includes, this should never be reached

			return false;

    }   

}

bool mapBuilderHandler::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:

			me->select(ch_simplified);

			break;

		case StateMapSetting:break;

        case StateMapCenter: break;

        case StateMapCenterStandardFlag: 

            lastBranch->activateStandardFlag(ch_simplified); 

            break;

        case StateMapCenterHeading: 

            lastBranch->setHeading(ch_simplified); 

            break;

        case StateMapCenterNote:

			lastBranch->setNote(ch_simplified);

			break;

        case StateBranch: break;

        case StateBranchStandardFlag: 

            lastBranch->activateStandardFlag(ch_simplified); 

            break;

        case StateBranchHeading: 

            lastBranch->setHeading(ch_simplified);

            break;

        case StateBranchNote: 

			lastBranch->setNote(ch_simplified);

			break;

        case StateBranchFloatImage: break;

        case StateHtmlNote: break;

        case StateHtml:

			htmldata+=ch_org;

			break;

        default: 

			return false;

    }

    return true;

}

QString mapBuilderHandler::errorString() 

{

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

}

bool mapBuilderHandler::fatalError( const QXmlParseException& exception ) 

{

    errorProt += QString( "fatal parsing error: %1 in line %2, column %3\n")

    .arg( exception.message() )

    .arg( exception.lineNumber() )

    .arg( exception.columnNumber() );

    return QXmlDefaultHandler::fatalError( exception );

}

void mapBuilderHandler::setMapEditor (MapEditor* e)

{

    me=e;

	mc=me->getMapCenter();

}

void mapBuilderHandler::setTmpDir (QString tp)

{

	tmpDir=tp;

}

void mapBuilderHandler::setLoadMode (const LoadMode &lm)

{

	loadMode=lm;

}

bool mapBuilderHandler::readBranchAttr (const QXmlAttributes& a)

{

	bool okx,oky;

	int x,y;

	if (!a.value( "absPosX").isEmpty() && loadMode==NewMap && branchDepth<2) 

	{

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

		{

			x=a.value("absPosX").toInt (&okx, 10);

			y=a.value("absPosY").toInt (&oky, 10);

			if (okx && oky) 

				lastBranch->move(x,y);

			else

				return false;   // Couldn't read absPos

		}           

	}           

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

		lastBranch->toggleScroll();

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

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

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

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

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

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

	return true;	

}

bool mapBuilderHandler::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( IO_ReadOnly) )

		{

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

			return false;

		}	

		QTextStream stream( &file );

		QString lines;

		while ( !stream.eof() ) {

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

		}

		file.close();

		// Convert to richtext

		if ( !QStyleSheet::mightBeRichText( lines ) )

		{

			// Here we are workarounding the QT conversion method:

			// convertFromPlainText does not generate valid xml, needed

			// for the parser, but just <p> and <br> without closing tags.

			// So we have to add those by ourselves

			//lines=quotemeta (lines);

			lines = QStyleSheet::convertFromPlainText( lines, QStyleSheetItem::WhiteSpaceNormal );

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

		}	

		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") );

	if (state == StateMapCenterNote) 	

		mc->setNote(no);

	else

		lastBranch->setNote(no);

	return true;

}

bool mapBuilderHandler::readFloatImageAttr (const QXmlAttributes& a)

{

	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() ) 

	{

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

			lastFloat->setFloatExport (true);

		else	

			lastFloat->setFloatExport (false);

	}	

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

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

    int x,y;

    bool okx,oky;

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

	{

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

		{

			// read relPos

			x=a.value("relPosX").toInt (&okx, 10);

			y=a.value("relPosY").toInt (&oky, 10);

			if (okx && oky) 

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

			else

				// Couldn't read relPos

				return false;  

		}           

	}	

	return true;

}

bool mapBuilderHandler::readXLinkAttr (const QXmlAttributes& a)

{

	QColor col;

	XLinkObj *xlo=new XLinkObj (mc->getCanvas());

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

	{

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

		xlo->setColor (col);

	}

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

	{

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

		{

			LinkableMapObj *lmo=mc->findObj (a.value( "beginBranch"));

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

			{

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

				lmo=mc->findObj (a.value( "endBranch"));

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

				{

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

					xlo->activate();

					return true;

				}

			}

			return true;	// Not all branches there yet, no error

		}           

	}	

	return false; 

}

bool mapBuilderHandler::readHtmlAttr (const QXmlAttributes& a)

{

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

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

	return true;

}

bool mapBuilderHandler::readSettingAttr (const QXmlAttributes& a)

{

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

	{

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

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

		else

			return false;

	} else

		return false;

	return true;

}