// Material data is hard coded into the functions in this file.
// Note that there are 12 materials present in H-M (large or small)

#include "XSbench_header.h"

// num_nucs represents the number of nuclides that each material contains
int * load_num_nucs(int n_isotopes)
{
	int * num_nucs = (int*)malloc(12*sizeof(int));
	
	// Material 0 is a special case (fuel). The H-M small reactor uses
	// 34 nuclides, while H-M larges uses 300.
	if( n_isotopes == 68 )
		num_nucs[0]  = 34; // HM Small is 34, H-M Large is 321
	else
		num_nucs[0]  = 321; // HM Small is 34, H-M Large is 321

	num_nucs[1]  = 5;
	num_nucs[2]  = 4;
	num_nucs[3]  = 4;
	num_nucs[4]  = 27;
	num_nucs[5]  = 21;
	num_nucs[6]  = 21;
	num_nucs[7]  = 21;
	num_nucs[8]  = 21;
	num_nucs[9]  = 21;
	num_nucs[10] = 9;
	num_nucs[11] = 9;

	return num_nucs;
}

// Assigns an array of nuclide ID's to each material
int ** load_mats( int * num_nucs, int n_isotopes )
{
	int ** mats = (int **) malloc( 12 * sizeof(int *) );
	for( int i = 0; i < 12; i++ )
		mats[i] = (int *) malloc(num_nucs[i] * sizeof(int) );

	// Small H-M has 34 fuel nuclides
	int mats0_Sml[] =  { 58, 59, 60, 61, 40, 42, 43, 44, 45, 46, 1, 2, 3, 7,
	                 8, 9, 10, 29, 57, 47, 48, 0, 62, 15, 33, 34, 52, 53, 
	                 54, 55, 56, 18, 23, 41 }; //fuel
	// Large H-M has 300 fuel nuclides
	int mats0_Lrg[321] =  { 58, 59, 60, 61, 40, 42, 43, 44, 45, 46, 1, 2, 3, 7,
	                 8, 9, 10, 29, 57, 47, 48, 0, 62, 15, 33, 34, 52, 53,
	                 54, 55, 56, 18, 23, 41 }; //fuel
	for( int i = 0; i < 321-34; i++ )
		mats0_Lrg[34+i] = 68 + i; // H-M large adds nuclides to fuel only
	
	// These are the non-fuel materials	
	int mats1[] =  { 63, 64, 65, 66, 67 }; // cladding
	int mats2[] =  { 24, 41, 4, 5 }; // cold borated water
	int mats3[] =  { 24, 41, 4, 5 }; // hot borated water
	int mats4[] =  { 19, 20, 21, 22, 35, 36, 37, 38, 39, 25, 27, 28, 29,
	                 30, 31, 32, 26, 49, 50, 51, 11, 12, 13, 14, 6, 16,
	                 17 }; // RPV
	int mats5[] =  { 24, 41, 4, 5, 19, 20, 21, 22, 35, 36, 37, 38, 39, 25,
	                 49, 50, 51, 11, 12, 13, 14 }; // lower radial reflector
	int mats6[] =  { 24, 41, 4, 5, 19, 20, 21, 22, 35, 36, 37, 38, 39, 25,
	                 49, 50, 51, 11, 12, 13, 14 }; // top reflector / plate
	int mats7[] =  { 24, 41, 4, 5, 19, 20, 21, 22, 35, 36, 37, 38, 39, 25,
	                 49, 50, 51, 11, 12, 13, 14 }; // bottom plate
	int mats8[] =  { 24, 41, 4, 5, 19, 20, 21, 22, 35, 36, 37, 38, 39, 25,
	                 49, 50, 51, 11, 12, 13, 14 }; // bottom nozzle
	int mats9[] =  { 24, 41, 4, 5, 19, 20, 21, 22, 35, 36, 37, 38, 39, 25,
	                 49, 50, 51, 11, 12, 13, 14 }; // top nozzle
	int mats10[] = { 24, 41, 4, 5, 63, 64, 65, 66, 67 }; // top of FA's
	int mats11[] = { 24, 41, 4, 5, 63, 64, 65, 66, 67 }; // bottom FA's
	
	// H-M large v small dependency
	if( n_isotopes == 68 )
		memcpy( mats[0],  mats0_Sml,  num_nucs[0]  * sizeof(int) );	
	else
		memcpy( mats[0],  mats0_Lrg,  num_nucs[0]  * sizeof(int) );
	
	// Copy other materials
	memcpy( mats[1],  mats1,  num_nucs[1]  * sizeof(int) );	
	memcpy( mats[2],  mats2,  num_nucs[2]  * sizeof(int) );	
	memcpy( mats[3],  mats3,  num_nucs[3]  * sizeof(int) );	
	memcpy( mats[4],  mats4,  num_nucs[4]  * sizeof(int) );	
	memcpy( mats[5],  mats5,  num_nucs[5]  * sizeof(int) );	
	memcpy( mats[6],  mats6,  num_nucs[6]  * sizeof(int) );	
	memcpy( mats[7],  mats7,  num_nucs[7]  * sizeof(int) );	
	memcpy( mats[8],  mats8,  num_nucs[8]  * sizeof(int) );	
	memcpy( mats[9],  mats9,  num_nucs[9]  * sizeof(int) );	
	memcpy( mats[10], mats10, num_nucs[10] * sizeof(int) );	
	memcpy( mats[11], mats11, num_nucs[11] * sizeof(int) );	
	
	// test
	/*
	for( int i = 0; i < 12; i++ )
		for( int j = 0; j < num_nucs[i]; j++ )
			printf("material %d - Nuclide %d: %d\n",
			       i, j, mats[i][j]);
	*/

	return mats;
}

// Creates a randomized array of 'concentrations' of nuclides in each mat
double ** load_concs( int * num_nucs )
{
	double ** concs = (double **)malloc( 12 * sizeof( double *) );
	
	for( int i = 0; i < 12; i++ )
		concs[i] = (double *)malloc( num_nucs[i] * sizeof(double) );
	
	for( int i = 0; i < 12; i++ )
		for( int j = 0; j < num_nucs[i]; j++ )
			concs[i][j] = (double) rand() / (double) RAND_MAX;

	// test
	/*
	for( int i = 0; i < 12; i++ )
		for( int j = 0; j < num_nucs[i]; j++ )
			printf("concs[%d][%d] = %lf\n", i, j, concs[i][j] );
	*/

	return concs;
}

// picks a material based on a probabilistic distribution
int pick_mat( unsigned long * seed )
{
	// I have a nice spreadsheet supporting these numbers. They are
	// the fractions (by volume) of material in the core. Not a 
	// *perfect* approximation of where XS lookups are going to occur,
	// but this will do a good job of biasing the system nonetheless.

	// Also could be argued that doing fractions by weight would be 
	// a better approximation, but volume does a good enough job for now.

	double dist[12];
	dist[0]  = 0.140;	// fuel
	dist[1]  = 0.052;	// cladding
	dist[2]  = 0.275;	// cold, borated water
	dist[3]  = 0.134;	// hot, borated water
	dist[4]  = 0.154;	// RPV
	dist[5]  = 0.064;	// Lower, radial reflector
	dist[6]  = 0.066;	// Upper reflector / top plate
	dist[7]  = 0.055;	// bottom plate
	dist[8]  = 0.008;	// bottom nozzle
	dist[9]  = 0.015;	// top nozzle
	dist[10] = 0.025;	// top of fuel assemblies
	dist[11] = 0.013;	// bottom of fuel assemblies
	
	//double roll = (double) rand() / (double) RAND_MAX;
	double roll = rn(seed);

	// makes a pick based on the distro
	for( int i = 0; i < 12; i++ )
	{
		double running = 0;
		for( int j = i; j > 0; j-- )
			running += dist[j];
		if( roll < running )
			return i;
	}

	return 0;
}
