/*
 * SlidingAverageProcess.cc
 *
 *  Created on: Dec 12, 2012
 *      Author: f.casimir
 */
#include <stdlib.h>
#include <string>

#include "Operation.hh"
#include "ParameterManager.hh"
#include "SlidingAverageProcess.hh"
#include "SlidingAverageCreator.hh"
#include "ParameterCreatorFromExpression.hh"

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

namespace AMDA {
namespace Parameters {

  SlidingAverageProcess::SlidingAverageProcess(Parameter &parameter)
  : SingleParamProcess_CRTP(parameter),
    _SlidingAverageTime(0.0) {
  }

  SlidingAverageProcess::SlidingAverageProcess(const SlidingAverageProcess& pProcess, Parameter &parameter)
    : SingleParamProcess_CRTP(pProcess,parameter),
      _SlidingAverageTime(pProcess._SlidingAverageTime) {
  }

  SlidingAverageProcess::~SlidingAverageProcess() {
  }

TimeStamp SlidingAverageProcess::init() {
	 TimeStamp timeStamp = _parameterInput->init( this, _timeIntervalList);
	Parameter::InfoList lInfoList = _parameterInput->getInfoList();
	_parameter.getInfoList().insert(lInfoList.begin(), lInfoList.end());
	_paramInput = _parameterInput->getParamData(this).get();

	//GET Sampling
	if (_attributList.size() != 1) {
		BOOST_THROW_EXCEPTION(AMDA::AMDA_exception() << AMDA::errno_code(AMDA_PROCESS_ERR) << AMDA::ex_msg(std::string("SlidingAverageProcess required at least one attribute: Sliding Average Time")));
	}
	 _SlidingAverageTime = atof(_attributList[0].c_str());

	SlidingAverageCreator lSlidingAverageCreator(*this,*_paramInput,_SlidingAverageTime);
	_operation = lSlidingAverageCreator.getOperation();
	_paramData = ParamDataSPtr(_operation->getParamOutput());
	_paramData->setMinSampling(_paramInput->getMinSampling());

	return timeStamp;

}

unsigned int SlidingAverageProcess::write() {
	unsigned int nbDataBeforeCallProcess = _paramData->getDataNumber();

	ParamDataIndexInfo lParamDataIndexInfo =_parameterInput->getAsync(this).get() ;

	_operation->write(lParamDataIndexInfo);
	//test if enough data has read to SlidingAverage
	// Continue to read data until _nbDataToProcess is not equal to zero and time interval changed or
	// when _nbDataToProcess is equal to zero (this commonly appears when all time interval are processed)
	if( (lParamDataIndexInfo._nbDataToProcess != 0 && !lParamDataIndexInfo._timeIntToProcessChanged) ||
			(lParamDataIndexInfo._nbDataToProcess == 0 && lParamDataIndexInfo._timeIntToProcessChanged) ) {
		ParamDataIndexInfo lParamDataIndexInfoTmp(lParamDataIndexInfo);
		double firstTime = _paramInput->getTime(lParamDataIndexInfo._startIndex);
		double lastTime = _paramInput->getTime(lParamDataIndexInfo._startIndex + lParamDataIndexInfo._nbDataToProcess - 1);
		//IF not enough data, get more data
		while( ((lParamDataIndexInfo._nbDataToProcess != 0 && !lParamDataIndexInfo._timeIntToProcessChanged) ||
				(lParamDataIndexInfo._nbDataToProcess == 0 && lParamDataIndexInfo._timeIntToProcessChanged))
				&& lastTime < (_SlidingAverageTime + firstTime) ) {
			lParamDataIndexInfoTmp =_parameterInput->getAsync(this).get() ;
			_operation->write(lParamDataIndexInfoTmp);
			lParamDataIndexInfo._nbDataToProcess += lParamDataIndexInfoTmp._nbDataToProcess;
			lastTime = _paramInput->getTime(lParamDataIndexInfo._startIndex + lParamDataIndexInfo._nbDataToProcess - 1);
		}
	}

	// Update ParamDataIndexInfo value of this DataWriter by getting information of the preceding parameter
	// (parameter->paramInterval->dataWriter->paramData->ParamDataIndexInfo)
	_paramData->getIndexInfo()._timeIntToProcessChanged = lParamDataIndexInfo._timeIntToProcessChanged;
	_paramData->getIndexInfo()._noMoreTimeInt = lParamDataIndexInfo._noMoreTimeInt;
	// Reset operation to prepare static data for the next TimeInterval.
	if (lParamDataIndexInfo._timeIntToProcessChanged) {
		_paramData->getIndexInfo()._endTimeIntIndexList.push_back(_paramData->getDataNumber());
		_operation->reset();
	}
	// There is no more time interval to process
	else if (lParamDataIndexInfo._noMoreTimeInt) {
		_paramData->getIndexInfo()._endTimeIntIndexList.push_back(_paramData->getDataNumber());
	} else {
		// Nothing to do.
	}

	return _paramData->getDataNumber() - nbDataBeforeCallProcess;
}



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