/*
 * ProcessStandard.cc
 *
 *  Created on: Oct 31, 2012
 *      Author: f.casimir
 */


#include <stdlib.h>
#include <dlfcn.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <string.h>


#include <string>
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <limits.h>

#include <boost/shared_ptr.hpp>
#include <boost/algorithm/string.hpp>

#include "DicError.hh"

#include "Helper.hh"

#include "Parameter.hh"
#include "Operation.hh"
#include "ParamData.hh"
#include "DataTypeMath.hh"
#include "ServicesServer.hh"
#include "DataWriter.hh"
#include "ParameterManager.hh"

#include "ProcessStandard.hh"

using namespace std;
using namespace boost;
using namespace log4cxx;


namespace AMDA {
namespace Parameters {


ProcessStandard::ProcessStandard(Parameter & parameter) :
		MultiParamProcess_CRTP<ProcessStandard>(parameter),
				_fct(""),
				_symboleName("processFct"),
				_handle(NULL),
				_processInit(NULL),
				_compilVersion(NULL),
				_accesDirect(false),
				_alreadyParsed(false),
				  _propertiesList("app.properties"),
				  _timeOfSoFile(0) {
				_servicesServer = ServicesServer::getInstance();
}



ProcessStandard::ProcessStandard(const ProcessStandard & pProcess, Parameter &parameter) :
		MultiParamProcess_CRTP<ProcessStandard>(pProcess,parameter),
				_fct(pProcess._fct),
				_symboleName(pProcess._symboleName),
				_handle(pProcess._handle),
				_processInit(pProcess._processInit),
				_compilVersion(pProcess._compilVersion),
				_accesDirect(pProcess._accesDirect),
				_alreadyParsed(pProcess._alreadyParsed),
				_propertiesList(pProcess._propertiesList),
				_timeOfSoFile(pProcess._timeOfSoFile) {
	_servicesServer = ServicesServer::getInstance();
	establishConnection();
}

ProcessStandard::~ProcessStandard() {
	this->_paramData.reset();
	delete _operation; _operation = NULL;
	closeDynamicLib(); //Attention au mémoire allouer par cette lib
}

void ProcessStandard::establishConnection() {
	if ( ! _expression.empty()) {
		parse();
		MultiParamProcess::establishConnection();
	}
}

TimeStamp ProcessStandard::init() {
	_fileNameRoot = _parameter.getId();
	size_t index = _fileNameRoot.find('/');
	if(index != string::npos) {
		_fileNameRoot.at(index) = '_';
	}

	std::string soDir;
	if (isUserProcess() && !_propertiesList["app.process.userlib"].empty()) {
		soDir = _propertiesList["app.process.userlib"];
	}
	else {
		soDir = _propertiesList["app.process.lib"];
	}

	if (soDir.empty() || (AMDA::Helpers::Helper::mkdir(soDir.c_str()) != 0)) {
		BOOST_THROW_EXCEPTION(Process_exception() << AMDA::errno_code(AMDA_PROCESS_ERR) << AMDA::ex_msg(std::string("ProcessStandard::init - Cannot create detination lib dir")));
	}

	_fileNameSO = soDir + "/" + _fileNameRoot + ".so";

	TimeStamp time = MultiParamProcess::init();
	if(mustGenerated(time)) {
		generateCppfile();
		time = generateSoFile();
	}
	loadDynamicLib();
	if ((_compilVersion == NULL) || ((*_compilVersion)() != PROCESS_STANDARD_COMPIL_VERSION)) {
		closeDynamicLib();
		generateCppfile();
		time = generateSoFile();
		loadDynamicLib();
	}
	// Create Operation && ParamData
	(*_processInit)(this);
	_paramData->setMinSampling(_minSampling);

	ParameterManager& lParameterManager = _parameter.getParameterManager();
	double minGapSize = NAN;

	for (auto param : _paramNameList) {
		ParameterSPtr& parameter = param.second.first;
		double crtGapSize = lParameterManager.getComputedGapSize(parameter->getGapThreshold(),parameter->getDataWriterTemplate()->getMinSampling());
		if (isNAN(minGapSize) || (crtGapSize < minGapSize))
			minGapSize = crtGapSize;
	}

	if (!isNAN(minGapSize)) {
		double computedGapThreshold = minGapSize / _minSampling;
		_parameter.setGapThreshold(computedGapThreshold);
	}

	return time;

}

double ProcessStandard::getMinSampling()
{
	if ( ! _expression.empty())
		parse();
	return MultiParamProcess_CRTP::getMinSampling();
}

#define MIN(a,b) (((a) < (b)) ? (a) :(b) )


void ProcessStandard::parse() {
	if (_alreadyParsed)
		return;

	ParameterManager& lParameterManager = _parameter.getParameterManager();

	_parser.process(_expression);
	const Parser::ListParameterName& lParameterNameList = _parser.getListParameterName();

	// Temporary Parameter creation
	const Parser::ListProcessName& processNameList = _parser.getListProcessName();
	Parser::ListProcessName::const_iterator lProcessIt = processNameList.begin();
	for (;lProcessIt!=processNameList.end();++lProcessIt) {
		ParameterSPtr lParameter;
		if ( lParameterManager.addParameter(&_parameter,lProcessIt->first,lParameter)) {
			Process* lProcess = _servicesServer->getProcess(lProcessIt->second.name,*lParameter.get());
			if ( lProcess) {
				lProcess->setExpression(lProcessIt->second.expression);
				lProcess->setAttributList(lProcessIt->second.attribut);
				lProcess->setIsUserProcess(isUserProcess());
				boost::shared_ptr<DataWriter> dataWriter = boost::shared_ptr<DataWriter>(static_cast<DataWriter *>(lProcess));
				lParameter->setDataWriter(dataWriter);
				_paramNameList[lProcessIt->first].first = lParameterManager.getParameter(lProcessIt->first);
			} else {
				stringstream lError;  lError << "Process: '" << lProcessIt->second.name << "' not found";
				LOG4CXX_ERROR(_logger, lError.str());
			    BOOST_THROW_EXCEPTION(Process_exception() << AMDA::errno_code(AMDA_PROCESS_ERR) << AMDA::ex_msg(lError.str()));
			}
		} else {
			_paramNameList[lProcessIt->first].first = lParameterManager.getParameter(lProcessIt->first);
		}
	}

	for (Parser::ListParameterName::const_iterator it = lParameterNameList.begin(); it != lParameterNameList.end(); ++it) {
		ParameterSPtr lParameter = lParameterManager.getParameter(*it);
		if (lParameter.get()) {
			_paramNameList[*it].first = lParameter;
			// Here we have a broken link in parameter chaining so create link.
			// Child is already creating before linking it to its parent parameter.
			_parameter.addParameter(lParameter);
		} else {
			LOG4CXX_ERROR(_logger, "parse of expression: \""<<_expression << "\" are impossible!");
	    	BOOST_THROW_EXCEPTION(Process_exception() << AMDA::errno_code(AMDA_PROCESS_ERR) << AMDA::ex_msg(std::string("Error to parse expression: ")+_expression));
		}
	}

	_alreadyParsed = true;
}

bool ProcessStandard::findInclude(std::string name, std::string &path, std::vector<std::string> &listSo)  {
	path = this->_propertiesList["app.plugin"] + "/" + name;
	bool find = false;
	if (AMDA::Helpers::Helper::getMatchFiles(path.c_str(), listSo, ".*.(so|a)$") == 0) {
		find = true;
	}
	return find;
}



bool ProcessStandard::mustGenerated(TimeStamp timeDepend) {
	bool recompile = false;

	if(_timeOfSoFile == 0) {
		if(_signatureTrigger != "") {
			// _signatureTrigger must be a name of xml parameter file
			timeDepend = std::max(TimeStamp(AMDA::Helpers::Helper::dateOfFile(_signatureTrigger.c_str())), timeDepend) ;
		}
		for(Parser::ListFctName::iterator it =  _parser.getListFctName().begin(); it != _parser.getListFctName().end(); ++it) {
			std::string path;
			SoList listLib;
			if(findInclude(*it, path, listLib)) {
				string includePath = path +"/" + *it;
				timeDepend = std::max(timeDepend, TimeStamp(AMDA::Helpers::Helper::dateOfFile((includePath + ".hh").c_str())));
				_streamIncludeFile << "#include \""<< *it <<".hh\" "; _streamIncludeFile << endl;
				_PluginList[path] = listLib;
			}
		}
		//return 0 if file not exist
		 _timeOfSoFile = AMDA::Helpers::Helper::dateOfFile(_fileNameSO.c_str());
		 recompile = (_timeOfSoFile <=  timeDepend);
	}

	return recompile;
}


	void ProcessStandard::generateCppfile() {

		LOG4CXX_INFO(_logger, "generation of compilation expression: " << _parser.getFormulaCc())

	size_t bufSize = _propertiesList["app.process.src"].size() + _fileNameRoot.size()  + 8;
	char  *buf = new char[bufSize];
	strcpy(buf,  (_propertiesList["app.process.src"] + "/" + _fileNameRoot).c_str());
	strcat(buf, "XXXXXX");
	 _workingDiretory = mkdtemp(buf);
	 delete[] buf;
	_fileNameC =_workingDiretory + "/" + _fileNameRoot + ".cc";

	fstream fileC(_fileNameC.c_str(), ios_base::out);

	fileC << " /*  File generated by AMDA */  " << endl;
	// Include
	fileC << "#include \"Operation.hh\" " << endl;
	fileC << "#include \"ServicesServer.hh\" " << endl;
	fileC << "#include \"Parameter.hh\"" << endl;
	fileC << "#include \"ParamData.hh\"" << endl;
	fileC << "#include \"DataTypeMath.hh\"" << endl;
	fileC << "#include \"ProcessStandard.hh\"" << endl;
	fileC << endl;
	fileC << "#include \"TimeInterval.hh\"" << endl;
	fileC << endl;
	fileC << "#include \"AMDA_constants.hh\"" << endl;
	fileC << endl;
	fileC << endl;
	fileC.flush();

	fileC << _streamIncludeFile.str();
	fileC << endl;
	fileC << endl;

	fileC << "#define PROCESS_STANDARD_COMPIL_VERSION " << PROCESS_STANDARD_COMPIL_VERSION << endl;
	fileC << endl;
	fileC << endl;

	for (ParameterList::iterator it = _paramNameList.begin(); it != _paramNameList.end(); ++it) {
		ParamDataSPtr p = it->second.first->getParamData(this);
		string lParamTypeName = " _T_" + boost::to_upper_copy(it->first) ;
		string  lElementTypeName = lParamTypeName + "_Element_Type";
		fileC << "typedef "<<  p->getElementType() << " " << lElementTypeName <<";"; fileC << endl;
		fileC << "typedef "<<  p->getParamDataType() << " " << lParamTypeName <<";"; fileC << endl;
	}
	fileC.flush();

	// Process Init Signature
	stringstream lProcessInit;
	lProcessInit << "void processInit(AMDA::Parameters::ProcessStandard *pProcess)";
	fileC << "extern \"C\" " << lProcessInit.str() << ";" ;
	fileC		<< endl;
	fileC << "extern \"C\" int compilVersion();" << endl;
	fileC << endl;
	fileC << endl;

	//Declaration Calss
	fileC << "template <typename TParamData>" << endl;
	ParameterManager& lParameterManager = this->_parameter.getParameterManager();
	std::string fixedParamId = this->_parameter.getId();
	lParameterManager.applyParamIdCorrection(fixedParamId);
	string lClassName =  "_Operation" + fixedParamId;
	fileC << "class " <<lClassName <<" : public AMDA::Parameters::Operation {"; fileC<< endl;
	fileC << "public:" << endl;
	fileC << endl;
	//Costructor
	fileC << lClassName <<"(AMDA::Parameters::ProcessStandard &pProcess) : AMDA::Parameters::Operation(pProcess), _processStandard(pProcess), _paramOutput(new TParamData())" << endl;
	fileC << "{" << endl;
	fileC << "	_paramDataOutput = _paramOutput;" << endl;
	for (ParameterList::iterator it = _paramNameList.begin(); it != _paramNameList.end(); ++it) {
		fileC <<"	" << it->first << " = dynamic_cast<_T_"<< boost::to_upper_copy(it->first)<< "*>( pProcess.getParameterList()[\""<< it->first << "\"].first->getParamData(&pProcess).get());"; fileC  << endl;
	}
	fileC << "}" << endl;
	fileC << endl;
	fileC.flush();

	//Destructor
	fileC << "virtual ~" <<lClassName<<"() {}"; fileC  << endl;
	fileC << endl;

	//Wirte methode
	fileC << "void  write(AMDA::Parameters::ParamDataIndexInfo &pParamDataIndexInfo) {" << endl;
	fileC << "	for (unsigned int index = pParamDataIndexInfo._startIndex; index < pParamDataIndexInfo._startIndex + pParamDataIndexInfo._nbDataToProcess; ++index) {" << endl;
	fileC << "		_paramOutput->pushTime(_processStandard.getParameterList().begin()->second.first->getParamData(&_process)->getTime(index));" << endl;
	fileC << "		_paramOutput->push("<< _parser.getFormulaCc() <<");"; fileC << endl;
	fileC << "	}" << endl;
	fileC << "}" << endl;
	fileC << endl;
	//attributs
	fileC << "AMDA::Parameters::ProcessStandard&  _processStandard;" << endl;
	fileC << "TParamData *_paramOutput;" << endl;
	fileC << "AMDA::Parameters::ParamDataIndexInfo _paramDataIndexInfo;" << endl;
	fileC.flush();

	for (ParameterList::iterator it = _paramNameList.begin(); it != _paramNameList.end(); ++it) {
		ParamDataSPtr p = it->second.first->getParamData(this);
		fileC << " _T_" + boost::to_upper_copy(it->first) <<" *" << it->first <<";"  << endl;
	}
	fileC << endl;
	//fin class
	fileC << "};" << endl;


	fileC << lProcessInit.str() << "{"<< endl;
	fileC << "  typedef decltype(AMDA::Parameters::generate(" << _parser.getContructorCc() <<")) _Generated_Type;" << endl;
	fileC << "	pProcess->setOperation(new " << lClassName<<"<_Generated_Type>(*pProcess));" ; fileC  << endl;
	fileC << "	pProcess->getParamData().reset( pProcess->getOperation()->getParamOutput());" << endl;
	fileC << "}" << endl;
	fileC << endl;

	fileC << "int compilVersion() {"<< endl;
	fileC << "	return PROCESS_STANDARD_COMPIL_VERSION;"<< endl;
	fileC << "}" << endl;
	fileC << endl;

	fileC.close();

}

TimeStamp ProcessStandard::generateSoFile() {
	string pathInclude;
	string pathlib;

	string fileNameSOTmp = _workingDiretory + "/" + _fileNameRoot + ".so";

	for(PluginList::iterator it =_PluginList.begin() ; it != _PluginList.end(); ++it) {
		pathInclude += " -I" +it->first;
		pathlib += " -L"+it->first;
		pathlib += " -Wl,-rpath,"+it->first;

		for(SoList::iterator itlib =it->second.begin() ; itlib != it->second.end(); ++itlib) {
			//pathlib = string(pwd) + "/" + it->first + "/" + *itlib;
			string name = *itlib;
			unsigned int posLastPoint = name.rfind('.');
			string rootLib = itlib->substr(3, posLastPoint - 3);
			pathlib += " -l"+rootLib;
		}
	}
	string command = _propertiesList["app.process.CXX_COMPILER"]
		//+ "-DParameters_EXPORTS" +
		+ " " + _propertiesList["app.process.CMAKE_CXX_FLAGS"]
		+ " " + _propertiesList["app.process.INCLUDE"]
		+ " " + pathInclude
		+ " " + _propertiesList["app.process.LIB"]
		+ " " + pathlib
		+ " -shared -Wl,-soname," + fileNameSOTmp  + " -o "
		+ fileNameSOTmp + " " + _fileNameC;

	if(AMDA::Helpers::Helper::SystemCommand(command, _logger)) {
		BOOST_THROW_EXCEPTION(Process_exception() << AMDA::errno_code(AMDA_PROCESS_ERR) << AMDA::ex_msg(std::string("Error to parse expression: ")+_expression));
	}
	//move file
	int status = rename(fileNameSOTmp.c_str(), _fileNameSO.c_str());
	if(status != 0) {
		LOG4CXX_ERROR(_logger, "rename  of : " << fileNameSOTmp << " in " << _fileNameSO <<" End with an error " << WTERMSIG(status));
    	BOOST_THROW_EXCEPTION(Process_exception() << AMDA::errno_code(AMDA_PROCESS_ERR) << AMDA::ex_msg("rename  of : " + fileNameSOTmp + " in " + _fileNameSO + " End with an error "));
	}

	//if not Debug environment
	const char* lBuildType=getenv("BUILD_TYPE");
	if(lBuildType && strcmp(lBuildType, "Debug")) {
		status = unlink(_fileNameC.c_str());
		if(_workingDiretory != ".") {
			status += rmdir(_workingDiretory.c_str());
		}
		if(status != 0) {
				LOG4CXX_WARN(_logger, "Suppression of temporary files: " << _fileNameC  <<" End with an error " << WTERMSIG(status));
			}
	}

	return AMDA::Helpers::Helper::dateOfFile(_fileNameSO.c_str());
}

//std::string ProcessStandard::_env(getenv("LD_LIBRARY_PATH"));
void ProcessStandard::loadDynamicLib() {
    std::string lLib = _fileNameSO;
//    /*set LD_LIBRARY_PATH */
//    string lLD_LIBRARY_PATH = "LD_LIBRARY_PATH=";
//	for(PluginList::iterator it =_PluginList.begin() ; it != _PluginList.end(); ++it) {
//		lLD_LIBRARY_PATH += it->first + ":";
//	}
//    lLD_LIBRARY_PATH +=  _env;
//	LOG4CXX_INFO(_logger, "add in environment: " << lLD_LIBRARY_PATH);
//	putenv(const_cast<char *>( lLD_LIBRARY_PATH.c_str()));


    _handle = dlopen(lLib.c_str(), RTLD_LAZY);
    if (!_handle) {
    	LOG4CXX_ERROR(_logger,dlerror());
    	BOOST_THROW_EXCEPTION(Process_exception() << AMDA::errno_code(AMDA_PROCESS_ERR) << AMDA::ex_msg(std::string("Error to parse expression: ")+_expression));
    }

    dlerror();    /* Clear any existing error */
    *(void **) (&_processInit) = dlsym(_handle, "processInit");

    char *error = dlerror();
    if (error != NULL)  {
    	LOG4CXX_ERROR(_logger,error);
    	BOOST_THROW_EXCEPTION(Process_exception() << AMDA::errno_code(AMDA_PROCESS_ERR) << AMDA::ex_msg(std::string("Error to parse expression: ")+_expression));
    }

    dlerror();    /* Clear any existing error */
    *(void **) (&_compilVersion) = dlsym(_handle, "compilVersion");

    error = dlerror();
    if (error != NULL)  {
	LOG4CXX_WARN(_logger,error);
    }
}

void ProcessStandard::closeDynamicLib() {

    if(_handle) dlclose(_handle);

}

} /* namespace Parameters */
} /* namespace AMDA */