//
// Created by Johannes on 15.12.2025.
//
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include "numbers.h"

//Framework
static int tests_run = 0;
static int tests_failed = 0;

#define RUNTEST(test) do {                 \
    tests_run++;                           \
    printf("Running %-30s ... ", #test);   \
    if (test()) {                          \
        printf("OK\n");                    \
    } else {                               \
        printf("FAIL\n");                  \
        tests_failed++;                    \
    }                                      \
} while (0)

#define ASSERT_TRUE(expr) do { \
    if (!(expr)) return false; \
} while (0)


void setUp(void) {
}

void tearDown(void) {
}

static bool array_contains(const unsigned int *arr, unsigned int len, unsigned int value)
{
    for (unsigned int i = 0; i < len; i++)
        if (arr[i] == value)
            return true;
    return false;
}

// Test: createNumbers gibt gültigen Pointer zurück
bool test_createNumbers_not_null(void)
{
    unsigned int len = 10;
    unsigned int *nums = createNumbers(len);

    ASSERT_TRUE(nums != NULL);

    free(nums);
    return true;
}

// Test: alle Zahlen liegen im erlaubten Bereich
bool test_createNumbers_range(void)
{
    unsigned int len = 20;
    unsigned int *nums = createNumbers(len);

    ASSERT_TRUE(nums != NULL);

    for (unsigned int i = 0; i < len; i++) {
        ASSERT_TRUE(nums[i] >= 1);
        ASSERT_TRUE(nums[i] <= 2 * len);
    }

    free(nums);
    return true;
}

// Test: es existiert genau ein Duplikat
bool test_getDuplicate_finds_duplicate(void)
{
    unsigned int len = 15;
    unsigned int *nums = createNumbers(len);

    ASSERT_TRUE(nums != NULL);

    unsigned int dup = getDuplicate(nums, len);

    ASSERT_TRUE(dup != 0);
    ASSERT_TRUE(array_contains(nums, len, dup));

    free(nums);
    return true;
}

// Test: getDuplicate gibt 0 bei Fehlerfall zurück
bool test_getDuplicate_no_duplicate(void)
{
    unsigned int nums[] = {1, 2, 3, 4, 5};
    unsigned int len = 5;

    unsigned int dup = getDuplicate(nums, len);

    ASSERT_TRUE(dup == 0);
    return true;
}

int main(void)
{
    RUNTEST(test_createNumbers_not_null);
    RUNTEST(test_createNumbers_range);
    RUNTEST(test_getDuplicate_finds_duplicate);
    RUNTEST(test_getDuplicate_no_duplicate);

    printf("\nTests run: %d\n", tests_run);
    printf("Tests failed: %d\n", tests_failed);

    return tests_failed ? EXIT_FAILURE : EXIT_SUCCESS;
}