#include "c_Array.h"
#include "c_Test.h"


// 用于测试的密集结构体
typedef struct {
    uint8_t r;
    uint8_t g;
    uint8_t b;
} PixelRGB_t;

TEST_CASE(test_fixed_generic_array_flow) {
    c_Array_t img_line;

    // 初始化一个长度固定为 3 的 RGB 像素扁平大数组
    ASSERT_INT_EQ(C_ERR_OK, c_Array_Init(&img_line, sizeof(PixelRGB_t), 3, NULL));
    ASSERT_INT_EQ(3, c_Array_Size(&img_line));
    ASSERT_PTR_NOT_NULL(img_line.array);

    PixelRGB_t red   = { .r = 255, .g = 0,   .b = 0 };
    PixelRGB_t green = { .r = 0,   .g = 255, .b = 0 };
    PixelRGB_t white = { .r = 255, .g = 255, .b = 255 };

    // 1. 验证定点写入 (Write)
    ASSERT_INT_EQ(C_ERR_OK, c_Array_Write(&img_line, 0, &red));
    ASSERT_INT_EQ(C_ERR_OK, c_Array_Write(&img_line, 1, &green));

    // 防御越界写入，应当报错拒绝
    ASSERT_INT_EQ(C_ERR_PARAM, c_Array_Write(&img_line, 3, &white));

    // 2. 验证定点读取与值复制强屏障 (Read)
    PixelRGB_t read_res;
    ASSERT_INT_EQ(C_ERR_OK, c_Array_Read(&img_line, 0, &read_res));
    ASSERT_INT_EQ(255, read_res.r);
    ASSERT_INT_EQ(0,   read_res.g);

    // 修改局部临时变量，验证内部数据不受二次污染
    red.r = 123;
    ASSERT_INT_EQ(C_ERR_OK, c_Array_Read(&img_line, 0, &read_res));
    ASSERT_INT_EQ(255, read_res.r); // 内部依旧是 255，证明完美值隔离

    // 3. 验证原位窥探能力 (Get)
    PixelRGB_t* direct_ptr = (PixelRGB_t*)c_Array_Get(&img_line, 1);
    ASSERT_PTR_NOT_NULL(direct_ptr);
    ASSERT_INT_EQ(255, direct_ptr->g);

    // 严苛验证固定物理内存布局：
    // 索引 1 的地址必须与数组首地址精准偏移 1 个 item_size 字节，完全不存在任何链式空隙
    ASSERT_TRUE((void*)((char*)img_line.array + sizeof(PixelRGB_t)) == (void*)direct_ptr);

    // 4. 验证全局批量刷值功能 (Fill)
    ASSERT_INT_EQ(C_ERR_OK, c_Array_Fill(&img_line, &white));

    // 抽样验证填充后的每一项是否全变成了白色
    PixelRGB_t* check_p2 = (PixelRGB_t*)c_Array_Get(&img_line, 2);
    ASSERT_INT_EQ(255, check_p2->r);
    ASSERT_INT_EQ(255, check_p2->g);
    ASSERT_INT_EQ(255, check_p2->b);

    c_Array_Destroy(&img_line);
}

int main(void) {
    printf("\n");
    TEST_START(C_Fixed_Array_Core_Layout_Tests);
    RUN_TEST(test_fixed_generic_array_flow);
    TEST_REPORT();
    RETURN_TEST_STATUS;
}