/*!\file:  kriging.cpp
 * \brief: kriging main parallel program
 */ 

#include "./issm.h"

/*Local prototypes*/
void ProcessArguments2(char** pbinfilename,char** poutbinfilename,char** plockfilename,char** prootpath,int argc,char **argv);
void ProcessInputfile(IssmDouble **px,IssmDouble **py,IssmDouble **pdata,int *pnobs,IssmDouble **px_interp,IssmDouble **py_interp,int *pninterp,Options **poptions,FILE* fid);

int main(int argc,char **argv){

	/*I/O: */
	FILE *output_fid = NULL;
	FILE *input_fid  = NULL;

	/*File names*/
	char *lockfilename   = NULL;
	char *binfilename    = NULL;
	char *outbinfilename = NULL;
	char *rootpath       = NULL;

	/*Input*/
	int         ninterp,nobs;
	IssmDouble *x        = NULL;
	IssmDouble *y        = NULL;
	IssmDouble *data     = NULL;
	IssmDouble *x_interp = NULL;
	IssmDouble *y_interp = NULL;
	Options    *options  = NULL;

	/*Output*/
	IssmDouble *predictions = NULL;
	IssmDouble *error       = NULL;

	/*Initialize exception trapping: */
	ExceptionTrapBegin();

	/*Initialize environment (MPI, PETSC, MUMPS, etc ...)*/
	ISSM_MPI_Comm comm=EnvironmentInit(argc,argv);
	IssmComm::SetComm(comm);

	ProcessArguments2(&binfilename,&outbinfilename,&lockfilename,&rootpath,argc,argv);

	/*Process input files*/
	input_fid=pfopen(binfilename,"rb");
	ProcessInputfile(&x,&y,&data,&nobs,&x_interp,&y_interp,&ninterp,&options,input_fid);
	pfclose(input_fid,binfilename);

	_printf0_("call computational core:\n");
	pKrigingx(&predictions,&error,x,y,data,nobs,x_interp,y_interp,ninterp,options);

	_printf0_("write results to disk:\n");
	Results *results = new Results();
	if(IssmComm::GetRank()==0){
		output_fid=pfopen0(outbinfilename,"wb");
		results->AddObject(new GenericExternalResult<double*>(results->Size()+1,"predictions",predictions,ninterp,1,1,0));
		results->AddObject(new GenericExternalResult<double*>(results->Size()+1,"error",error,ninterp,1,1,0));
		for(int i=0;i<results->Size();i++){
			ExternalResult* result=xDynamicCast<ExternalResult*>(results->GetObjectByOffset(i));
			result->WriteData(output_fid,1);
		}
		pfclose(output_fid,outbinfilename);
	}

	/*Close output and toolkits options file and write lock file if requested*/
	_printf0_("write lock file:\n");
	WriteLockFile(lockfilename);

	/*Free ressources */
	xDelete<char>(lockfilename);
	xDelete<char>(binfilename);
	xDelete<char>(outbinfilename);
	xDelete<char>(rootpath);
	xDelete<IssmDouble>(x);
	xDelete<IssmDouble>(y);
	xDelete<IssmDouble>(data);
	xDelete<IssmDouble>(x_interp);
	xDelete<IssmDouble>(y_interp);
	xDelete<IssmDouble>(predictions);
	xDelete<IssmDouble>(error);
	delete options;
	delete results;

	/*Finalize environment:*/
	EnvironmentFinalize();

	/*Finalize exception trapping: */
	ExceptionTrapEnd();

	return 0; //unix success return;
}

void ProcessArguments2(char** pbinfilename,char** poutbinfilename,char** plockfilename,char** prootpath,int argc,char **argv){
	char *modelname      = NULL;
	char *binfilename    = NULL;
	char *outbinfilename = NULL;
	char *lockfilename   = NULL;
	char *rootpatharg    = NULL;
	char *rootpath       = NULL;

	if(argc<1)_error_("Usage error: no execution path provided");
	if(argc<2)_error_("Usage error: missing model name");

	rootpatharg=argv[1];
	if(strcmp(strstr(rootpatharg,"/"),"/")!=0){ 
		rootpath       = xNew<char>(strlen(rootpatharg)+2); sprintf(rootpath,"%s/",rootpatharg);
	}  
	else{
		rootpath       = xNew<char>(strlen(rootpatharg)+1); sprintf(rootpath,"%s",rootpatharg);
	} 

	modelname=argv[2];
	if(strstr(modelname,rootpath)==NULL){
		binfilename    = xNew<char>(strlen(rootpath)+strlen(modelname)+strlen(".bin")   +1); sprintf(binfilename,   "%s%s%s",rootpath,modelname,".bin");
		outbinfilename = xNew<char>(strlen(rootpath)+strlen(modelname)+strlen(".outbin")+1); sprintf(outbinfilename,"%s%s%s",rootpath,modelname,".outbin");
		lockfilename   = xNew<char>(strlen(rootpath)+strlen(modelname)+strlen(".lock")  +1); sprintf(lockfilename,  "%s%s%s",rootpath,modelname,".lock");
	}
	else{
		binfilename    = xNew<char>(strlen(modelname)+strlen(".bin")   +1); sprintf(binfilename,   "%s%s",modelname,".bin");
		outbinfilename = xNew<char>(strlen(modelname)+strlen(".outbin")+1); sprintf(outbinfilename,"%s%s",modelname,".outbin");
		lockfilename   = xNew<char>(strlen(modelname)+strlen(".lock")  +1); sprintf(lockfilename,  "%s%s",modelname,".lock");
	}

	/*Clean up and assign output pointer*/
	*pbinfilename=binfilename;
	*poutbinfilename=outbinfilename;
	*plockfilename=lockfilename;
	*prootpath=rootpath;
}

void ProcessInputfile(IssmDouble **px,IssmDouble **py,IssmDouble **pdata,int *pnobs,IssmDouble **px_interp,IssmDouble **py_interp,int *pninterp,Options **poptions,FILE* fid){

	int         ninterp    ,nobs;
	IssmDouble *x        = NULL;
	IssmDouble *y        = NULL;
	IssmDouble *data     = NULL;
	IssmDouble *x_interp = NULL;
	IssmDouble *y_interp = NULL;
	Options    *options  = NULL;

	int      M,N;
	IoModel* iomodel = new IoModel();
	iomodel->fid=fid;
	iomodel->CheckFile();
	iomodel->FetchData(&x,&M,&N,"md.x");        nobs=M*N;
	iomodel->FetchData(&y,&M,&N,"md.y");        _assert_(M*N==nobs);
	iomodel->FetchData(&data,&M,&N,"md.data");     _assert_(M*N==nobs);
	iomodel->FetchData(&x_interp,&M,&N,"md.x_interp"); ninterp=M*N;
	iomodel->FetchData(&y_interp,&M,&N,"md.y_interp"); _assert_(M*N==ninterp);

	/*Read options*/
	options = new Options();
	iomodel->FetchData(options,"md.y_interp");

	/*Assign output pointer*/
	*px        = x;
	*py        = y;
	*pdata     = data;
	*pnobs     = nobs;
	*px_interp = x_interp;
	*py_interp = y_interp;
	*pninterp  = ninterp;
	*poptions  = options;
	delete iomodel;
}
