#include <med.h>
#define MESGERR 1
#include <med_utils.h>
#include <string.h>
int main (int argc, char **argv) {
  med_idt fid;
  const char meshname[MED_NAME_SIZE+1] = "2D unstructured mesh";
  const char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE_FIELD";
  const med_int ncomponent = 1;
  const char componentname[MED_SNAME_SIZE+1] = "TEMPERATURE";
  const char componentunit[MED_SNAME_SIZE+1] = "C";
  const med_int ntria3 = 8;
  const med_int nquad4 = 4;
  const med_float tria3values_step1[8] = {1000., 2000., 3000., 4000., 
                                          5000., 6000., 7000., 8000.};
  const med_float quad4values_step1[4] = {10000., 20000., 30000., 4000.};
  const med_float tria3values_step2[8] = {1500., 2500., 3500., 4500., 
                                          5500., 6500., 7500., 8500.};
  const med_float quad4values_step2[4] = {15000., 25000., 35000., 45000.};
  int ret=-1;
  
  fid = MEDfileOpen("UsesCase_MEDfield_4.med",MED_ACC_CREAT);
  if (fid < 0) {
    MESSAGE("ERROR : file creation ...");
    goto ERROR;
  }
  
  if (MEDlinkWr(fid,meshname,"./UsesCase_MEDmesh_1.med") < 0) {
    MESSAGE("ERROR : create mesh link ...");
    goto ERROR;
  }
  
  
 
  if (MEDfieldCr(fid, fieldname, MED_FLOAT64, 
                 ncomponent, componentname, componentunit,"ms", meshname) < 0) {
    MESSAGE("ERROR : create field");
    goto ERROR;
  }
  
  
  
  
  
  if (MEDfieldValueWr(fid, fieldname, 1, 1, 5.5, MED_CELL, MED_TRIA3, MED_FULL_INTERLACE, 
                      MED_ALL_CONSTITUENT, ntria3, (unsigned char*) tria3values_step1) < 0) {
    MESSAGE("ERROR : write field values on MED_TRIA3");
    goto ERROR;
  }
    
  if (MEDfieldValueWr(fid, fieldname, 1, 1, 5.5, MED_CELL,MED_QUAD4, MED_FULL_INTERLACE, 
                      MED_ALL_CONSTITUENT, nquad4, (unsigned char*) quad4values_step1) < 0) {
    MESSAGE("ERROR : write field values on MED_QUAD4 ");
    goto ERROR;
  }
  
  
  if (MEDfieldValueWr(fid, fieldname, 2 , 1 , 8.9 , MED_CELL, MED_TRIA3, MED_FULL_INTERLACE, 
                      MED_ALL_CONSTITUENT, ntria3,  (unsigned char*)tria3values_step2) < 0) {
    MESSAGE("ERROR : write field values on MED_TRIA3");
    goto ERROR;
  }
  
  if (MEDfieldValueWr(fid, fieldname, 2, 1, 8.9, MED_CELL, MED_QUAD4, MED_FULL_INTERLACE, 
                      MED_ALL_CONSTITUENT, nquad4, (unsigned char*)quad4values_step2) < 0) {
    MESSAGE("ERROR : write field values on MED_QUAD4 ");
    goto ERROR;
  }
  
  if ( MEDfieldComputingStepMeshWr(fid, fieldname, 2, 1,
                                   1, 3 ) < 0 ) {
    MESSAGE("ERROR : write field mesh computation step error ");
    goto ERROR;
  }
  ret=0;
 ERROR:
  
  if (MEDfileClose(fid) < 0) {
    MESSAGE("ERROR : close file ...");             
    ret=-1; 
  } 
  
  return ret;
}