/**
 * @file unit_test_framework.h
 * @brief Minimaler Test-Runner fuer demo-epb.
 *
 * In Produktion wuerde hier CppUTest oder Google Test stehen
 * (siehe docs/SWE-Plan.docx, Abschnitt 7). Fuer die Demo
 * bleibt das Framework klein, damit es ohne externe Abhaengigkeiten baut.
 */
#ifndef UNIT_TEST_FRAMEWORK_H
#define UNIT_TEST_FRAMEWORK_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct {
    int tests_run;
    int tests_failed;
} TestStats;

extern TestStats g_test_stats;

#define TEST_BEGIN(name)                                     \
    do {                                                     \
        ++g_test_stats.tests_run;                            \
        const char* _test_name = name;                       \
        int _test_failed = 0;                                \
        printf("  TEST  %s ... ", _test_name);

#define TEST_END()                                           \
        if (_test_failed) { ++g_test_stats.tests_failed;     \
            printf("FAIL\n"); }                              \
        else { printf("ok\n"); }                             \
    } while (0)

#define ASSERT_TRUE(expr)                                    \
    do { if (!(expr)) { _test_failed = 1;                    \
        printf("\n    ASSERT_TRUE failed: %s (%s:%d)\n",     \
            #expr, __FILE__, __LINE__); } } while (0)

#define ASSERT_EQ(a, b)                                      \
    do { long long _a = (long long)(a), _b = (long long)(b); \
        if (_a != _b) { _test_failed = 1;                    \
            printf("\n    ASSERT_EQ failed: %s=%lld != %s=%lld (%s:%d)\n", \
                #a, _a, #b, _b, __FILE__, __LINE__); }       \
    } while (0)

#define ASSERT_NE(a, b)                                      \
    do { long long _a = (long long)(a), _b = (long long)(b); \
        if (_a == _b) { _test_failed = 1;                    \
            printf("\n    ASSERT_NE failed: %s==%s==%lld (%s:%d)\n", \
                #a, #b, _a, __FILE__, __LINE__); }           \
    } while (0)

#define TEST_SUMMARY()                                       \
    do {                                                     \
        printf("\n%d tests run, %d failed.\n",               \
            g_test_stats.tests_run, g_test_stats.tests_failed); \
        return (g_test_stats.tests_failed == 0) ? 0 : 1;     \
    } while (0)

#endif /* UNIT_TEST_FRAMEWORK_H */