#include <stdio.h>
#include "carla_host.h"

static int tests_passed = 0;
static int tests_failed = 0;

#define ASSERT_EQ(expected, actual, msg) do { \
    if ((expected) != (actual)) { \
        fprintf(stderr, "FAIL: %s  (expected %d, got %d)\n", msg, (int)(expected), (int)(actual)); \
        tests_failed++; \
    } else { \
        printf("PASS: %s\n", msg); \
        tests_passed++; \
    } \
} while(0)

#define ASSERT_TRUE(expr, msg) do { \
    if (!(expr)) { \
        fprintf(stderr, "FAIL: %s\n", msg); \
        tests_failed++; \
    } else { \
        printf("PASS: %s\n", msg); \
        tests_passed++; \
    } \
} while(0)

static void test_carla_load_null_binary(void)
{
    int id = -999;
    int ret = carla_load(NULL, "someplugin", &id);
    ASSERT_EQ(-1, ret, "carla_load(NULL, ...) returns -1");
}

static void test_carla_unload_invalid_id(void)
{
    int ret = carla_unload(-1);
    ASSERT_EQ(-1, ret, "carla_unload(-1) returns -1");
}

static void test_carla_connect_invalid_id(void)
{
    int ret = carla_connect(-1, "out", "looper:in");
    ASSERT_EQ(-1, ret, "carla_connect(-1, ...) returns -1");
}

static void test_carla_get_handle_before_init(void)
{
    CarlaHostHandle h = carla_get_handle();
    ASSERT_TRUE(h == NULL, "carla_get_handle() returns NULL before init");
}

static void test_carla_set_bypass_invalid_id(void)
{
    carla_set_bypass(-1, true);
    printf("PASS: carla_set_bypass(-1, true) did not crash\n");
    tests_passed++;
}

static void test_carla_disconnect_no_jack(void)
{
    int ret = carla_disconnect("from", "to");
    ASSERT_EQ(0, ret, "carla_disconnect('from','to') returns 0 when no JACK client");
}

static void test_carla_set_bypass_valid_id_no_handle(void)
{
    carla_set_bypass(0, true);
    printf("PASS: carla_set_bypass(0, true) did not crash (no handle)\n");
    tests_passed++;
}

static void test_carla_unload_valid_id_no_handle(void)
{
    int ret = carla_unload(0);
    ASSERT_EQ(-1, ret, "carla_unload(0) returns -1 when no handle");
}

int main(void)
{
    printf("=== Carla host unit tests ===\n");

    test_carla_load_null_binary();
    test_carla_unload_invalid_id();
    test_carla_connect_invalid_id();
    test_carla_get_handle_before_init();
    test_carla_set_bypass_invalid_id();
    test_carla_disconnect_no_jack();
    test_carla_set_bypass_valid_id_no_handle();
    test_carla_unload_valid_id_no_handle();

    printf("\nResults: %d passed, %d failed\n", tests_passed, tests_failed);
    return tests_failed > 0 ? 1 : 0;
}