/**
 * This source file is part of OgreColladaPlugin
 * an addon for OGRE (Object-oriented Graphics Rendering Engine)
 * For the latest info, see http://www.ogre3d.org/
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.

 * This program 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 Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 * @author	Philipp Hartl
 * @see		README
 */

#include "OgreColladaUtils.h"
#include "OgreColladaSyntax.h"

#include "OgreColourValue.h"
#include "OgreStringVector.h"

namespace Ogre
{
	//-------------------------------------------------------------------------
	xmlNode *ColladaUtils::getChildById(xmlNode *start, const char *id)
	{
		if (start != NULL && id != NULL)
		{
			// we are looking for strings without '#'
			if (*id == '#') ++id;

			// walk through all children
			for (xmlNode *c = start->children; c != NULL; c = c->next)
			{
				// we are interested on element nodes only
				if (c->type != XML_ELEMENT_NODE) continue;

				String cid = getProperty(c, CS_ATR_ID);
				if (!cid.empty())
				{
					if (cid == id) return c;
				}
			}
		}

		return NULL;
	}

	//-------------------------------------------------------------------------
	xmlNode *ColladaUtils::getChildByTagName(xmlNode *start, const String &tagname)
	{
		if (start != NULL && !tagname.empty())
		{
			for (xmlNode *c = start->children; c != NULL; c = c->next)
			{	
				if (c->type != XML_ELEMENT_NODE) continue;

				if (tagname == (const char *)c->name) return c;
			}
		}

		return NULL;
	}

	//-------------------------------------------------------------------------
	xmlNodePtrVector ColladaUtils::getChildsByTagName(xmlNode *start, const String &tagname)
	{
		xmlNodePtrVector nodes;

		if (start != NULL && !tagname.empty())
		{
			for (xmlNode *c = start->children; c != NULL; c = c->next)
			{
				if (c->type != XML_ELEMENT_NODE) continue;

				if (tagname == (const char *)c->name) nodes.push_back(c);
			}
		}

		return nodes;
	}

	//-------------------------------------------------------------------------
	String ColladaUtils::getContent(xmlNode *node)
	{
		String result = "";
		if (node != NULL)
		{
			xmlChar *data = xmlNodeGetContent(node);

			if (data != NULL)
			{
				result = (const char *)data;
				xmlFree(data);
			}
		}
		return result;
	}

	//-------------------------------------------------------------------------
	String ColladaUtils::getContentDirect(xmlNode *node)
	{
		String result = "";
		if (node != NULL)
		{
			if (node->children != NULL &&
				node->children->type == XML_TEXT_NODE &&
				node->children->content != NULL)
			{
				result = (const char *)node->children->content;
			}
		}
		return result;
	}

	//-------------------------------------------------------------------------
	String ColladaUtils::getProperty(xmlNode *node, const char *property)
	{
		String result = "";
		if (node != NULL && property != NULL)
		{
			xmlChar *data = xmlGetProp(node, (const xmlChar *)property);
		
			if (data != NULL)
			{
				result = (const char *)data;
				xmlFree(data);
			}
		}

		return result;
	}

	//-------------------------------------------------------------------------
	String ColladaUtils::getProperty(xmlNode *node, const String &property)
	{
		String result = "";
		if (node != NULL && !property.empty())
		{
			xmlChar *data = xmlGetProp(node, (const xmlChar *)property.c_str());
		
			if (data != NULL)
			{
				result = (const char *)data;
				xmlFree(data);
			}
		}

		return result;
	}

	//-------------------------------------------------------------------------
	void ColladaUtils::printChildElements(xmlNode *node)
	{
		for (xmlNode *child = node->children; child != NULL; child = child->next)
		{
			if (child->type != XML_ELEMENT_NODE) continue;
			LogManager::getSingleton().logMessage("ColladaUtils::printElementNames - xml element: " + String((const char *)child->name));
		}
	}

	//-------------------------------------------------------------------------
	void ColladaUtils::printAllElements(xmlNode *node)
	{
		for (xmlNode *cur_node = node; cur_node != NULL; cur_node = cur_node->next)
		{
			if (cur_node->type != XML_ELEMENT_NODE) continue;
			LogManager::getSingleton().logMessage("ColladaUtils::printElementNames - xml element: " + String((const char *)cur_node->name));

			printAllElements(cur_node->children);
		}
	}
}