/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "CCUserDefault.h"
#include "platform/CCCommon.h"
#include "platform/CCFileUtils.h"
#include "tinyxml2/tinyxml2.h"

// root name of xml
#define USERDEFAULT_ROOT_NAME    "userDefaultRoot"

#define XML_FILE_NAME "UserDefault.xml"

using namespace std;

NS_CC_BEGIN

/**
 * define the functions here because we don't want to
 * export xmlNodePtr and other types in "CCUserDefault.h"
 */

static tinyxml2::XMLElement* getXMLNodeForKey(const char* pKey, tinyxml2::XMLElement** rootNode, tinyxml2::XMLDocument **doc)
{
    tinyxml2::XMLElement* curNode = NULL;

    // check the key value
    if (! pKey)
    {
        return NULL;
    }

    do 
    {
 		tinyxml2::XMLDocument* xmlDoc = new tinyxml2::XMLDocument();
		*doc = xmlDoc;
		//CCFileData data(CCUserDefault::sharedUserDefault()->getXMLFilePath().c_str(),"rt");
		unsigned long nSize;
		const char* pXmlBuffer = (const char*)CCFileUtils::sharedFileUtils()->getFileData(CCUserDefault::sharedUserDefault()->getXMLFilePath().c_str(), "rb", &nSize);
		//const char* pXmlBuffer = (const char*)data.getBuffer();
		if(NULL == pXmlBuffer)
		{
			CCLOG("can not read xml file");
			break;
		}
		xmlDoc->Parse(pXmlBuffer);
		// get root node
		*rootNode = xmlDoc->RootElement();
		if (NULL == *rootNode)
		{
			CCLOG("read root node error");
			break;
		}
		// find the node
		curNode = (*rootNode)->FirstChildElement();
		while (NULL != curNode)
		{
			const char* nodeName = curNode->Value();
			if (!strcmp(nodeName, pKey))
			{
				break;
			}

			curNode = curNode->NextSiblingElement();
		}
	} while (0);

	return curNode;
}

static void setValueForKey(const char* pKey, const char* pValue)
{
 	tinyxml2::XMLElement* rootNode;
	tinyxml2::XMLDocument* doc;
	tinyxml2::XMLElement* node;
	// check the params
	if (! pKey || ! pValue)
	{
		return;
	}
	// find the node
	node = getXMLNodeForKey(pKey, &rootNode, &doc);
	// if node exist, change the content
	if (node)
	{
        if (node->FirstChild())
        {
            node->FirstChild()->SetValue(pValue);
        }
        else
        {
            tinyxml2::XMLText* content = doc->NewText(pValue);
            node->LinkEndChild(content);
        }
	}
	else
	{
		if (rootNode)
		{
			tinyxml2::XMLElement* tmpNode = doc->NewElement(pKey);//new tinyxml2::XMLElement(pKey);
			rootNode->LinkEndChild(tmpNode);
			tinyxml2::XMLText* content = doc->NewText(pValue);//new tinyxml2::XMLText(pValue);
			tmpNode->LinkEndChild(content);
		}	
	}

    // save file and free doc
	if (doc)
	{
		doc->SaveFile(CCUserDefault::sharedUserDefault()->getXMLFilePath().c_str());
		delete doc;
	}
}

/**
 * implements of CCUserDefault
 */

CCUserDefault* CCUserDefault::m_spUserDefault = 0;
string CCUserDefault::m_sFilePath = string("");
bool CCUserDefault::m_sbIsFilePathInitialized = false;

/**
 * If the user invoke delete CCUserDefault::sharedUserDefault(), should set m_spUserDefault
 * to null to avoid error when he invoke CCUserDefault::sharedUserDefault() later.
 */
CCUserDefault::~CCUserDefault()
{
	CC_SAFE_DELETE(m_spUserDefault);
    m_spUserDefault = NULL;
}

CCUserDefault::CCUserDefault()
{
	m_spUserDefault = NULL;
}

void CCUserDefault::purgeSharedUserDefault()
{
    m_spUserDefault = NULL;
}

 bool CCUserDefault::getBoolForKey(const char* pKey)
 {
     return getBoolForKey(pKey, false);
 }

bool CCUserDefault::getBoolForKey(const char* pKey, bool defaultValue)
{
    const char* value = NULL;
	tinyxml2::XMLElement* rootNode;
	tinyxml2::XMLDocument* doc;
	tinyxml2::XMLElement* node;
	node =  getXMLNodeForKey(pKey, &rootNode, &doc);
	// find the node
	if (node && node->FirstChild())
	{
        value = (const char*)(node->FirstChild()->Value());
	}

	bool ret = defaultValue;

	if (value)
	{
		ret = (! strcmp(value, "true"));
	}

    if (doc) delete doc;

	return ret;
}

int CCUserDefault::getIntegerForKey(const char* pKey)
{
    return getIntegerForKey(pKey, 0);
}

int CCUserDefault::getIntegerForKey(const char* pKey, int defaultValue)
{
	const char* value = NULL;
	tinyxml2::XMLElement* rootNode;
	tinyxml2::XMLDocument* doc;
	tinyxml2::XMLElement* node;
	node =  getXMLNodeForKey(pKey, &rootNode, &doc);
	// find the node
	if (node && node->FirstChild())
	{
        value = (const char*)(node->FirstChild()->Value());
	}

	int ret = defaultValue;

	if (value)
	{
		ret = atoi(value);
	}

	if(doc)
	{
		delete doc;
	}


	return ret;
}

float CCUserDefault::getFloatForKey(const char* pKey)
{
    return getFloatForKey(pKey, 0.0f);
}

float CCUserDefault::getFloatForKey(const char* pKey, float defaultValue)
{
    float ret = (float)getDoubleForKey(pKey, (double)defaultValue);
 
    return ret;
}

double  CCUserDefault::getDoubleForKey(const char* pKey)
{
    return getDoubleForKey(pKey, 0.0);
}

double CCUserDefault::getDoubleForKey(const char* pKey, double defaultValue)
{
	const char* value = NULL;
	tinyxml2::XMLElement* rootNode;
	tinyxml2::XMLDocument* doc;
	tinyxml2::XMLElement* node;
	node =  getXMLNodeForKey(pKey, &rootNode, &doc);
	// find the node
	if (node && node->FirstChild())
	{
        value = (const char*)(node->FirstChild()->Value());
	}

	double ret = defaultValue;

	if (value)
	{
		ret = atof(value);
	}

    if (doc) delete doc;

	return ret;
}

std::string CCUserDefault::getStringForKey(const char* pKey)
{
    return getStringForKey(pKey, "");
}

string CCUserDefault::getStringForKey(const char* pKey, const std::string & defaultValue)
{
    const char* value = NULL;
	tinyxml2::XMLElement* rootNode;
	tinyxml2::XMLDocument* doc;
	tinyxml2::XMLElement* node;
	node =  getXMLNodeForKey(pKey, &rootNode, &doc);
	// find the node
	if (node && node->FirstChild())
	{
        value = (const char*)(node->FirstChild()->Value());
	}

	string ret = defaultValue;

	if (value)
	{
		ret = string(value);
	}

    if (doc) delete doc;

	return ret;
}

void CCUserDefault::setBoolForKey(const char* pKey, bool value)
{
    // save bool value as string

    if (true == value)
    {
        setStringForKey(pKey, "true");
    }
    else
    {
        setStringForKey(pKey, "false");
    }
}

void CCUserDefault::setIntegerForKey(const char* pKey, int value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    // format the value
    char tmp[50];
    memset(tmp, 0, 50);
    sprintf(tmp, "%d", value);

    setValueForKey(pKey, tmp);
}

void CCUserDefault::setFloatForKey(const char* pKey, float value)
{
    setDoubleForKey(pKey, value);
}

void CCUserDefault::setDoubleForKey(const char* pKey, double value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    // format the value
    char tmp[50];
    memset(tmp, 0, 50);
    sprintf(tmp, "%f", value);

    setValueForKey(pKey, tmp);
}

void CCUserDefault::setStringForKey(const char* pKey, const std::string & value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    setValueForKey(pKey, value.c_str());
}

CCUserDefault* CCUserDefault::sharedUserDefault()
{
    initXMLFilePath();

    // only create xml file one time
    // the file exists after the program exit
    if ((! isXMLFileExist()) && (! createXMLFile()))
    {
        return NULL;
    }

    if (! m_spUserDefault)
    {
        m_spUserDefault = new CCUserDefault();
    }

    return m_spUserDefault;
}

bool CCUserDefault::isXMLFileExist()
{
    FILE *fp = fopen(m_sFilePath.c_str(), "r");
	bool bRet = false;

	if (fp)
	{
		bRet = true;
		fclose(fp);
	}

	return bRet;
}

void CCUserDefault::initXMLFilePath()
{
    if (! m_sbIsFilePathInitialized)
    {
        m_sFilePath += CCFileUtils::sharedFileUtils()->getWritablePath() + XML_FILE_NAME;
        m_sbIsFilePathInitialized = true;
    }    
}

// create new xml file
bool CCUserDefault::createXMLFile()
{
	bool bRet = false;  
    tinyxml2::XMLDocument *pDoc = new tinyxml2::XMLDocument(); 
    if (NULL==pDoc)  
    {  
        return false;  
    }  
	tinyxml2::XMLDeclaration *pDeclaration = pDoc->NewDeclaration("1.0");  
	if (NULL==pDeclaration)  
	{  
		return false;  
	}  
	pDoc->LinkEndChild(pDeclaration); 
	tinyxml2::XMLElement *pRootEle = pDoc->NewElement(USERDEFAULT_ROOT_NAME);  
	if (NULL==pRootEle)  
	{  
		return false;  
	}  
	pDoc->LinkEndChild(pRootEle);  
	bRet = tinyxml2::XML_SUCCESS == pDoc->SaveFile(m_sFilePath.c_str());

	if(pDoc)
	{
		delete pDoc;
	}

	return bRet;
}

const string& CCUserDefault::getXMLFilePath()
{
    return m_sFilePath;
}

void CCUserDefault::flush()
{
}

NS_CC_END