#include "c_MinPQ.h"
#include "c_Test.h"

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

static int min_pq_compare_ints(const void* a, const void* b, void* args) {
    (void)args;
    int arg1 = *(const int*)a;
    int arg2 = *(const int*)b;
    if (arg1 < arg2) return -1;
    if (arg1 > arg2) return 1;
    return 0;
}

TEST_CASE(test_c_MinPQ_FullChainStatusCodes) {
    c_MinPQ_t pq;
    // 就地初始化
    c_err_t err = c_MinPQ_Init(&pq, 2, sizeof(int), min_pq_compare_ints, NULL, &c_DefaultAllocator);
    ASSERT_INT_EQ(C_ERR_OK, err);

    // 1. 验证初次空堆下的 Pop 和 Peek 是否完美返回 C_ERR_EMPTY
    int dummy = 0;
    ASSERT_INT_EQ(C_ERR_EMPTY, c_MinPQ_Pop(&pq, &dummy));
    ASSERT_INT_EQ(C_ERR_EMPTY, c_MinPQ_Peek(&pq, &dummy));

    int data[] = { 45, 12, 85, 4, 67 };
    c_size_t num = sizeof(data) / sizeof(data[0]);

    for (c_size_t i = 0; i < num; i++) {
        // 2. 验证规范后的 Push 返回状态码
        ASSERT_INT_EQ(C_ERR_OK, c_MinPQ_Push(&pq, &data[i]));
    }
    ASSERT_INT_EQ((int)num, (int)pq.size);

    int previous_extracted = -999999;
    int current_extracted = 0;

    // 3. 验证连续循环弹出状态链
    while (pq.size > 0) {
        ASSERT_INT_EQ(C_ERR_OK, c_MinPQ_Peek(&pq, &current_extracted));

        int pop_verify = 0;
        ASSERT_INT_EQ(C_ERR_OK, c_MinPQ_Pop(&pq, &pop_verify));
        ASSERT_INT_EQ(current_extracted, pop_verify);

        // 验证最小堆单调递增性
        ASSERT_TRUE(previous_extracted <= current_extracted);
        previous_extracted = current_extracted;
    }

    // 4. 彻底清空后，再次断言状态码归回 C_ERR_EMPTY
    ASSERT_INT_EQ(C_ERR_EMPTY, c_MinPQ_Pop(&pq, &dummy));

    c_MinPQ_Destroy(&pq);
}

TEST_CASE(test_c_MinPQ_ParamDefenses) {
    c_MinPQ_t local_pq;
    c_MinPQ_Init(&local_pq, 4, sizeof(int), min_pq_compare_ints, NULL, NULL);

    int item = 42;
    // 5. 验证各底层核心函数对非法入参的 C_ERR_PARAM 拦截线
    ASSERT_INT_EQ(C_ERR_PARAM, c_MinPQ_Init(NULL, 4, sizeof(int), min_pq_compare_ints, NULL, NULL));
    ASSERT_INT_EQ(C_ERR_PARAM, c_MinPQ_Push(NULL, &item));
    ASSERT_INT_EQ(C_ERR_PARAM, c_MinPQ_Pop(NULL, &item));
    ASSERT_INT_EQ(C_ERR_PARAM, c_MinPQ_Peek(NULL, &item));
    ASSERT_INT_EQ(C_ERR_PARAM, c_MinPQ_Peek(&local_pq, NULL));

    c_MinPQ_Destroy(&local_pq);
}

int main(int argc, char** argv){

    TEST_START(C_MinPQ_FullChainStatus_TestSuite);
    RUN_TEST(test_c_MinPQ_FullChainStatusCodes);
    RUN_TEST(test_c_MinPQ_ParamDefenses);
    TEST_REPORT();
    RETURN_TEST_STATUS;
}