#include <stdio.h>
#include <stdlib.h>
#include "numbers.h"

int main() {
    printf("===== TEST NUMBERS =====\n");

    unsigned int len = 20;
    unsigned int *arr = createNumbers(len);

    if (arr == NULL) {
        printf("FAIL: createNumbers returned NULL\n");
        return 1;
    }

    // Check length: should contain len numbers
    printf("PASS: createNumbers != NULL\n");

    // Count duplicates — exactly one number must appear twice
    int countDuplicate = 0;

    for (unsigned int i = 0; i < len; i++) {
        for (unsigned int j = i + 1; j < len; j++) {
            if (arr[i] == arr[j]) {
                countDuplicate++;
            }
        }
    }

    if (countDuplicate != 1) {
        printf("FAIL: Array must contain exactly one duplicate, found %d\n", countDuplicate);
        free(arr);
        return 1;
    }
    printf("PASS: exactly one duplicate\n");

    unsigned int found = getDuplicate(arr, len);
    printf("Duplicate found by getDuplicate(): %u\n", found);

    if (found == 0) {
        printf("FAIL: getDuplicate returned 0\n");
        free(arr);
        return 1;
    }

    printf("PASS: getDuplicate\n");

    free(arr);
    printf("PASS: free array\n");

    printf("ALL NUMBERS TESTS PASSED\n");
    return 0;
}