// Valuation Lines
//
// valuation_lines
//
// Valuation Lines
//
// 
//
// Inputs:    4
// Outputs:   2
// Constants: 1


#include <math.h>
#include "ts.h"

typedef struct {
    uint_t k;
} ts_valuation_lines_params_t;

ts_parameter_t const ts_valuation_lines_p = { .n_inputs = 4, .n_outputs = 2, .n_constants = 1, .params_size = sizeof(ts_valuation_lines_params_t) };

uint_t ts_valuation_lines_offset( ts_constant_t const *c )
{
	( void )c;
	return ( c ? ((ts_valuation_lines_params_t *)c)->k > 0 ? ((ts_valuation_lines_params_t *)c)->k - 1 : 0 : 0 );
}

int ts_valuation_lines(
	fp_t * const *y, uint_t y_n,
	fp_t const * const *x, uint_t x_n,
	uint_t n, ts_constant_t const *c
)
{
	TS_PROLOGUE( ts_valuation_lines_p );
	if ( !c ) return -1;
	uint_t k = ((ts_valuation_lines_params_t *)c)->k;
	if (k == 0 || n < k) return -1;

	for( uint_t i = k - 1; i < n; ++i )
	{
		fp_t min_val = ts_l( x, i );
		for( uint_t j = 1; j < k; ++j )
		{
			fp_t val = ts_l( x, i - j );
			if( val < min_val )
				min_val = val;
		}
		y[0][i] = min_val;

		fp_t max_val = ts_h( x, i );
		for( uint_t j = 1; j < k; ++j )
		{
			fp_t val = ts_h( x, i - j );
			if( val > max_val )
				max_val = val;
		}
		y[1][i] = max_val;
	}
	return 0;
}