/* vim: set ts=4 sts=4 sw=4 noet : */
/* vim: set ts=4 sts=4 sw=4 noet : */	
#include<stdio.h>
#include<general.h>
#include<snapshot.h>
#include<stdlib.h>
#include<stdarg.h>
#include <zlib.h>
#include<inttypes.h>
#include<config.h>
#include <time.h>
#include <string.h>
#include "io.h"
#include <b64zlib_compression.h>
/* a helper function that utilizes ts_string data structure and performs same as sprintf */
ts_uint ts_sprintf(ts_string *str, char *fmt, ...){
	va_list ap;
	va_start(ap,fmt);
	ts_uint n=vsprintf(&(str->string[str->beg]),fmt,ap);
	va_end(ap);
	str->beg+=n;
	return n;
}

/* outputs additional data into paraview xml file */
ts_bool xml_trisurf_data(FILE *fh, ts_vesicle *vesicle){

	ts_string *data=(ts_string *)malloc(sizeof(ts_sprintf));
	data->string=(char *)malloc(5120000*sizeof(char)); /*TODO: warning, can break if the string is to long */
	data->beg=0;
	
	xml_trisurf_header(fh, vesicle);
	xml_trisurf_tria(data,vesicle->tlist);
	xml_trisurf_tria_neigh(data,vesicle->tlist);
	xml_trisurf_vtx_neigh(data,vesicle->vlist);	
	xml_trisurf_vtx_tristar(data,vesicle->vlist);
	xml_trisurf_nucleus(data,vesicle);
	xml_trisurf_constvolarea(data,V0,A0);
//#ifdef COMPRESSION
//	char *compressed;
//	ts_uint nbytes=ts_compress_string64(data->string, data->beg-1, &compressed); //suppress null character at the end with by substracting 1
//	fwrite(compressed, sizeof(unsigned char), nbytes, fh);
//	free (compressed);
//#else
	fprintf(fh,"%s", data->string);
//#endif
	free(data->string);  /* TODO: valgrind is not ok with this! */
	free(data);
	xml_trisurf_footer(fh);
	return TS_SUCCESS;
}

ts_bool xml_trisurf_header(FILE *fh, ts_vesicle *vesicle){
/* format current time */
	time_t current_time;
    	char *c_time_string;
	current_time = time(NULL);
	c_time_string = ctime(&current_time);
	int npoly, nfono;	

	fprintf(fh, "<trisurfversion>Trisurf (commit %s), compiled on %s %s</trisurfversion>\n",TS_VERSION, __DATE__,  __TIME__);
	fprintf(fh, "<dumpdate>%s</dumpdate>\n", c_time_string);

	fprintf(fh, "<tape>");
		fprintf(fh,"%s",tapetxt);	
	fprintf(fh, "</tape>\n");
	if(vesicle->poly_list!=NULL){
		npoly=vesicle->poly_list->n;
		if(npoly!=0){
			nfono=vesicle->poly_list->poly[0]->vlist->n;
		} else {
			nfono=0;
		}
	} else {
		npoly=0;
		nfono=0;
	}
	fprintf(fh, "<trisurf nvtx=\"%u\" npoly=\"%u\" nmono=\"%u\" compressed=\"false\">\n", vesicle->vlist->n, npoly, nfono);
	return TS_SUCCESS;
}

ts_bool xml_trisurf_footer(FILE *fh){
	fprintf(fh, "</trisurf>\n");
	return TS_SUCCESS;
}

ts_bool xml_trisurf_tria(ts_string *data, ts_triangle_list *tlist){
	ts_uint i;
	ts_sprintf(data,"<tria>");
	for(i=0; i<tlist->n;i++){
		ts_sprintf(data,"%u %u %u ",tlist->tria[i]->vertex[0]->idx, tlist->tria[i]->vertex[1]->idx, tlist->tria[i]->vertex[2]->idx);
	}
	ts_sprintf(data,"</tria>");
	return TS_SUCCESS;
}

ts_bool xml_trisurf_tria_neigh(ts_string *data, ts_triangle_list *tlist){
	ts_uint i;
	ts_sprintf(data,"<trianeigh>\n");
	for(i=0; i<tlist->n;i++){
		ts_sprintf(data,"%u %u %u ",tlist->tria[i]->neigh[0]->idx, tlist->tria[i]->neigh[1]->idx, tlist->tria[i]->neigh[2]->idx);
	}
	ts_sprintf(data,"</trianeigh>\n");
	return TS_SUCCESS;
}

ts_bool xml_trisurf_vtx_neigh(ts_string *data, ts_vertex_list *vlist){
	ts_uint i,j;
	for(i=0;i<vlist->n;i++){
		ts_sprintf(data,"<vtxn idx=\"%u\">",vlist->vtx[i]->idx);
		for(j=0;j<vlist->vtx[i]->neigh_no;j++){
			ts_sprintf(data,"%u ",vlist->vtx[i]->neigh[j]->idx);
		}
		ts_sprintf(data, "</vtxn>");
	}
	return TS_SUCCESS;
}

ts_bool xml_trisurf_vtx_tristar(ts_string *data, ts_vertex_list *vlist){
	ts_uint i,j;
	for(i=0;i<vlist->n;i++){
		ts_sprintf(data,"<tristar idx=\"%u\">",vlist->vtx[i]->idx);
		for(j=0;j<vlist->vtx[i]->tristar_no;j++){
			ts_sprintf(data,"%u ",vlist->vtx[i]->tristar[j]->idx);
		}
		ts_sprintf(data, "</tristar>");
	}
	return TS_SUCCESS;
}

ts_bool xml_trisurf_nucleus(ts_string *data, ts_vesicle* vesicle){
	if(vesicle->R_nucleus>0.0 || (vesicle->R_nucleusX>0.0 && vesicle->R_nucleusY>0.0 && vesicle->R_nucleusZ>0.0)){
		ts_sprintf(data,"<nucleus>%.17e %.17e %.17e</nucleus>",vesicle->nucleus_center[0], vesicle->nucleus_center[1], vesicle->nucleus_center[2]);
	}
	return TS_SUCCESS;
}
ts_bool xml_trisurf_constvolarea(ts_string *data, ts_double volume, ts_double area){
	ts_sprintf(data,"<constant_volume>%.17e</constant_volume>",volume);
	ts_sprintf(data,"<constant_area>%.17e</constant_area>",area);

	return TS_SUCCESS;
}