#include "xtc/xtc.h"
#include "xtc/xtc_engine.h"

#include <math.h>
#include <stdio.h>

#define CHECK(condition) do { \
    if (!(condition)) { \
        (void)fprintf(stderr, "FAIL %s:%d: %s\n", __FILE__, __LINE__, #condition); \
        return 1; \
    } \
} while (0)

int main(void)
{
    xtc_app *app = NULL;
    xtc_graph *graph = NULL;
    size_t node_a = 0U;
    size_t node_b = 0U;
    float input[4] = {1.0f, -1.0f, 0.5f, 0.0f};
    float output[4] = {0.0f, 0.0f, 0.0f, 0.0f};

    CHECK(xtc_app_create(&app) == XTC_OK);
    CHECK(app != NULL);
    xtc_app_destroy(app);

    CHECK(xtc_graph_create(4U, &graph) == XTC_OK);
    CHECK(xtc_graph_add_gain(graph, 0.5f, &node_a) == XTC_OK);
    CHECK(xtc_graph_add_gain(graph, 2.0f, &node_b) == XTC_OK);
    CHECK(xtc_graph_connect(graph, node_a, node_b) == XTC_OK);
    CHECK(xtc_graph_validate(graph) == XTC_OK);
    CHECK(xtc_graph_process_offline(graph, input, output, 4U, 1.0f) == XTC_OK);
    CHECK(fabsf(output[0] - 1.0f) < 0.0001f);
    CHECK(fabsf(output[1] + 1.0f) < 0.0001f);
    CHECK(fabsf(output[2] - 0.5f) < 0.0001f);

    CHECK(xtc_graph_connect(graph, node_b, node_a) == XTC_ERR_GRAPH_CYCLE);
    CHECK(xtc_graph_validate(graph) == XTC_OK);

    xtc_graph_destroy(graph);
    (void)puts("All xtc core tests passed.");
    return 0;
}