// PC test of the REAL fingerprint.c and detector.c.
//   gcc -I stubs -iquote ../../main host_test.c ../../main/fingerprint.c ../../main/detector.c -lm -o host_test
#include <math.h>
#include <stdio.h>
#include "fingerprint.h"
#include "detector.h"
#include "test_vector.h"

static int fails;
#define CHECK(c, ...) do { if (!(c)) { printf("FAIL: " __VA_ARGS__); printf("\n"); fails++; } } while (0)

int main(void)
{
    CHECK(features_init() == ESP_OK, "features_init");
#if TEST_VECTOR_VALID
    static features_ctx_t ctx; float fp[NUM_BANDS], rms;
    bool ok = features_compute(&ctx, TEST_VECTOR_PCM, fp, &rms);
    float me = 0; for (int b = 0; b < NUM_BANDS; b++) { float e = fabsf(fp[b] - TEST_VECTOR_FP[b]); if (e > me) me = e; }
    printf("parity: ok=%d max|fp err|=%.2e  rms C=%.4f py=%.4f\n", ok, me, rms, TEST_VECTOR_RMS);
    CHECK(ok && me < 1e-3f, "fingerprint parity");
#endif
    // degenerate inputs must not produce NaN
    static int16_t z[FRAME_LEN]; static features_ctx_t c2; float f2[NUM_BANDS], r2;
    CHECK(!features_compute(&c2, z, f2, &r2) && r2 == 0.0f, "silence -> invalid, rms 0");
    for (int b = 0; b < NUM_BANDS; b++) CHECK(f2[b] == 0.0f, "silence fp zero");

    // detector: 10-of-15 triggers once, cooldown 20 s, then re-arms
    detector_t d; detector_init(&d);
    detector_cfg_t cfg = { 15, 10, 20000 };
    uint32_t t = 0; int trig = 0, first = -1;
    for (int i = 0; i < 40; i++, t += 32) if (detector_update(&d, i >= 5 && i < 30, t, &cfg)) { trig++; if (first < 0) first = i; }
    CHECK(trig == 1 && first == 14, "single trigger at 10th match (got %d trig, first %d)", trig, first);
    CHECK(d.state == DET_COOLDOWN, "cooldown after trigger");
    for (int i = 0; i < 100; i++, t += 32) CHECK(!detector_update(&d, true, t, &cfg), "no trigger in cooldown");
    t += 20000; detector_update(&d, false, t, &cfg);
    CHECK(d.state == DET_IDLE, "back to idle");
    int n = 0; for (int i = 0; i < 12; i++, t += 32) n += detector_update(&d, true, t, &cfg);
    CHECK(n == 1, "re-arms and triggers again");
    // sparse matches never trigger
    detector_reset(&d); n = 0;
    for (int i = 0; i < 300; i++, t += 32) n += detector_update(&d, i % 3 == 0, t, &cfg);
    CHECK(n == 0, "1-in-3 matches must not trigger 10/15");
    printf(fails ? "HOST TEST FAILED\n" : "HOST TEST PASSED\n");
    return fails != 0;
}