#include <jni.h>
#include "set_plot.h"

JNIEXPORT jdoubleArray JNICALL
Java_ru_setcorp_setprotocol_trends_NativePlot_evaluate(JNIEnv *env, jobject self,
    jint operation, jdoubleArray input) {
    double values[10], result[4];
    jsize n;
    size_t count;
    jdoubleArray output;
    (void)self;
    if (!input) return NULL;
    n = (*env)->GetArrayLength(env, input);
    if (n < 0 || n > 10) return NULL;
    (*env)->GetDoubleArrayRegion(env, input, 0, n, values);
    if ((*env)->ExceptionCheck(env)) return NULL;
    count = set_plot_eval((uint32_t)operation, values, (size_t)n, result, 4);
    if (!count) return NULL;
    output = (*env)->NewDoubleArray(env, (jsize)count);
    if (output) (*env)->SetDoubleArrayRegion(env, output, 0, (jsize)count, result);
    return output;
}