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//File initially based on treemodel.h from Qt 4.x , but is almost nothing like it now...

/*
    treemodel.cpp

    Provides a simple tree model to show how to create and use hierarchical
    models.
*/

#include <QtGui>
#include <QDomDocument>
#include <QFile>

#include "schelptreemodel.h"

ScHelpTreeModel::ScHelpTreeModel(const QString &dataFile, const QString &col1name, const QString &col2name, QMap<QString, QString>* indexToBuild, QObject *parent)
    : TreeModel(parent)
{
	QList<QVariant> rootData;
	rootData << col1name << col2name;
	rootItem = new TreeItem(rootData);
	if (!dataFile.isEmpty())
		setupModelData(dataFile, rootItem, indexToBuild);
}

void ScHelpTreeModel::setupModelData(const QString &dataFile, TreeItem *parent, QMap<QString, QString>* indexToBuild)
{
	QFile file( dataFile );
	if ( !file.open( QIODevice::ReadOnly ) )
		return;
	QDomDocument doc( "menuentries" );
	if ( !doc.setContent( &file ) )
	{
		file.close();
		return;
	}
	file.close();

	QList<TreeItem*> parents;
	QList<int> indentations;
	parents << parent;
	indentations << 0;
	QDomElement docElem = doc.documentElement();
	QDomNode n = docElem.firstChild();
//	bool haveTutorials=false;
	QList<QVariant> columnData;
	int position=0;
	while( !n.isNull() )
	{
		QDomElement e = n.toElement(); // try to convert the node to an element.
		if( !e.isNull() )
		{
			if (e.hasAttribute( "text" ) && e.hasAttribute( "file" ))
			{
				QDomAttr textAttr = e.attributeNode( "text" );
				QDomAttr fileAttr = e.attributeNode( "file" );
				columnData.clear();
				columnData << textAttr.value() <<  fileAttr.value();
				if (position > indentations.last()) 
				{
					// The last child of the current parent is now the new parent
					// unless the current parent has no children.
		
					if (parents.last()->childCount() > 0) 
					{
						parents << parents.last()->child(parents.last()->childCount()-1);
						indentations << position;
					}
				}
				else 
				{
					while (position < indentations.last() && parents.count() > 0) {
						parents.pop_back();
						indentations.pop_back();
					}
				}
				// Append a new item to the current parent's list of children.
				parents.last()->appendChild(new TreeItem(columnData, parents.last()));
				if (indexToBuild)
					indexToBuild->insert(textAttr.value(), fileAttr.value());
			}

			QDomNodeList nl=n.childNodes();
			if (nl.count()>0)
				position=1;
			for(int i=0 ; i<= nl.count() ; i++)
			{
				QDomNode child=nl.item(i);
				if (child.isElement())
				{
					QDomElement ec = child.toElement();
					if (!ec.isNull())
					{
						if (ec.hasAttribute( "text" ) && ec.hasAttribute( "file" ))
						{
							QDomAttr textAttr = ec.attributeNode( "text" );
							QDomAttr fileAttr = ec.attributeNode( "file" );
							columnData.clear();
							columnData << textAttr.value() <<  fileAttr.value();
							if (position > indentations.last()) 
							{
								// The last child of the current parent is now the new parent
								// unless the current parent has no children.
					
								if (parents.last()->childCount() > 0) 
								{
									parents << parents.last()->child(parents.last()->childCount()-1);
									indentations << position;
								}
							}
							else 
							{
								while (position < indentations.last() && parents.count() > 0) {
									parents.pop_back();
									indentations.pop_back();
								}
							}
							// Append a new item to the current parent's list of children.
							parents.last()->appendChild(new TreeItem(columnData, parents.last()));
							if (indexToBuild)
								indexToBuild->insert(textAttr.value(), fileAttr.value());
						}
						//3rd level
						QDomNodeList nl2=child.childNodes();
						if (nl2.count()>0)
							position=2;
						for(int i2=0 ; i2<= nl2.count() ; i2++)
						{
							QDomNode childchild=nl2.item(i2);
							if (childchild.isElement())
							{
								QDomElement ecc = childchild.toElement();
								if (!ecc.isNull())
								{
									QDomAttr textAttr = ecc.attributeNode( "text" );
									QDomAttr fileAttr = ecc.attributeNode( "file" );
									columnData.clear();
									columnData << textAttr.value() <<  fileAttr.value();
									if (position > indentations.last()) 
									{
										// The last child of the current parent is now the new parent
										// unless the current parent has no children.
							
										if (parents.last()->childCount() > 0) 
										{
											parents << parents.last()->child(parents.last()->childCount()-1);
											indentations << position;
										}
									}
									else 
									{
										while (position < indentations.last() && parents.count() > 0) {
											parents.pop_back();
											indentations.pop_back();
										}
									}
									// Append a new item to the current parent's list of children.
									parents.last()->appendChild(new TreeItem(columnData, parents.last()));
									if (indexToBuild)
										indexToBuild->insert(textAttr.value(), fileAttr.value());
								}
							}
						}
						position=1;
					}
				}
			}
			position=0;
		}
		n = n.nextSibling();
	}
}

void ScHelpTreeModel::addRow(const QString& s1, const QString& s2, int i)
{
	QList<TreeItem*> parents;
	QList<int> indentations;
	parents << rootItem;
	if (parents.last()->childCount() > 0) 
		parents << parents.last()->child(parents.last()->childCount()-1);
	QList<QVariant> columnData;
	columnData << s1 << s2;// << i;
	parents.last()->appendChild(new TreeItem(columnData, parents.last()));
}
