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

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

void test_length_and_duplicate()
{
    setSeed(1);
    unsigned int len = 10;
    unsigned int *test_numbers = createNumbers(len);

    TEST_ASSERT_NOT_NULL(test_numbers);

    //Bereich checken:
    for (unsigned int i = 0; i < len; i++)
    {
        TEST_ASSERT_TRUE(test_numbers[i] >= 1);
        TEST_ASSERT_TRUE(test_numbers[i] <= len * 2);
    }

    //Prüfen, ob genau 1 Wert doppelt vorkommt:
    unsigned int duplicate = getDuplicate(test_numbers, len);
    TEST_ASSERT_NOT_EQUAL(0, duplicate);

    unsigned int occurrences = count_number_occurrence(test_numbers, len, duplicate);
    TEST_ASSERT_EQUAL_UINT(2, occurrences);

    //Prüfen, ob alle anderen Werte nur einmal vorkommen:
    for (unsigned int i = 1; i <= len * 2; i++)
    {
        if (i == duplicate)
            continue;

        unsigned int c = count_number_occurrence(test_numbers, len, i);
        TEST_ASSERT_TRUE(c <= 1); //Keine Zahl darf doppelt vorkommen.
    }

    free(test_numbers);
}

void test_duplicate_value()
{
    unsigned int test_numbers[6] = {1, 2, 3, 4, 5, 5};
    unsigned int duplicate = 0;

    duplicate = getDuplicate(test_numbers, 6);

    TEST_ASSERT_EQUAL(5, duplicate);
}

void test_duplicate_value_if_false()
{
    unsigned int test_numbers[6] = {1, 2, 3, 4, 5, 6};
    unsigned int duplicate = 0;

    duplicate = getDuplicate(test_numbers, 6);

    TEST_ASSERT_EQUAL(0, duplicate);
}

void setUp(void) {}

void tearDown(void) {}

int main(void)
{
    UNITY_BEGIN();

    RUN_TEST(test_length_and_duplicate);
    RUN_TEST(test_duplicate_value);
    RUN_TEST(test_duplicate_value_if_false);
    return UNITY_END();
}