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

bool ts_test_trend_intensity_index( void )
{
    uint_t k = 3;

    fp_t const o[] = { 10, 11, 12, 11, 12, 10, 11, 13, 12, 14 };
    fp_t const h[] = { 12, 13, 14, 12, 14, 11, 12, 15, 14, 16 };
    fp_t const l[] = { 8,  9,  10,  9,  10,  9,  10,  11,  10,  12 };
    fp_t const c[] = { 11, 12, 10, 11, 11, 10, 12, 14, 13, 15 };
    fp_t const v[] = { 100, 200, 300, 400, 500, 300, 200, 400, 300, 500 };

    fp_t const * const x[] = { o, h, l, c, v };

    fp_t signed_sum = 0;
    fp_t vol_sum = 0;

    for( uint_t i = 1; i <= k; ++i )
    {
        signed_sum += ( c[i] > c[i - 1] ) ? v[i] : -v[i];
        vol_sum += v[i];
    }

    fp_t e[10] = { 0 };
    e[0] = ( vol_sum != 0 ) ? signed_sum / vol_sum : 0;

    for( uint_t i = k + 1; i < 10; ++i )
    {
        fp_t cur_signed = ( c[i] > c[i - 1] ) ? v[i] : -v[i];
        fp_t old_signed = ( c[i - k] > c[i - k - 1] ) ? v[i - k] : -v[i - k];
        signed_sum += cur_signed - old_signed;
        vol_sum += v[i] - v[i - k];
        e[i - (k - 1)] = ( vol_sum != 0 ) ? signed_sum / vol_sum : 0;
    }

    fp_t const * const e_arr[1] = { e };
    uint_t c_val = k;

    return ts_test(ts_trend_intensity_index, ts_trend_intensity_index_offset, x, e_arr, 10, (ts_constant_t *)&c_val, &ts_trend_intensity_index_p);
}