/**
 * @file array.c
 * @author CylAlon(ChenYinglong)
 * @brief
 * @version 1.0.0
 * @date 2022-07-20
 */
/*
 * 完整的API见头文件，头文件提供了一套宏定义扩展array库。
 * 本动态数组库支持任意类型的数组(包括自定义的结构体类型),
 * 本数据结构提供了两种方式初始化数组，一种是自动增长Cap的方式Array_Init，一种是指定数组Array_InitStatic，
 * 由于malloc可能存在碎片化问题，所以建议使用Array_InitStatic。
 * 如果将malloc以及free替换成自己的内存管理函数，那么就可以使用Array_Init。
 * */
#include "array.h"

#ifdef ARRAY_ENABLE

#define Array_Resize_Unit 8

/**
 * @brief Initialize an array.
 *
 * @param array The array to initialize.
 */
void Array_Init(Array_t *array, int cap, uint8_t elm_bytes)
{
    array->type = true;

    array->Data = (uint8_t *) malloc(cap * elm_bytes);
    memset(array->Data, 0, cap * elm_bytes);
    array->Cap = cap;
    array->ElemBytes = elm_bytes;
    array->Size = 0;
}

void Array_InitStatic(Array_t *array, int cap, uint8_t elm_bytes, uint8_t *buff)
{
    array->type = false;
    array->Data = buff;
    array->Cap = cap;
    array->ElemBytes = elm_bytes;
    array->Size = 0;
}

/**
 * @brief Destruction of the array.
 *
 * @param array The array to destroy.
 */
void Array_Destroy(Array_t *array)
{
    if (array->type)
    {
        FreePtr(array->Data);
    }
    array->Data = NULL;
    array->type = false;
    array->Cap = 0;
    array->ElemBytes = 0;
    array->Size = 0;
}

/**
 * @brief Expanding the array.
 *
 * @param array The array to expand.
 * @param cap
 */
static bool Array_Resize(Array_t *array, int size)
{
    if (array->type == false)
    {
        return false;
    }
    if (array != NULL)
    {
        uint8_t len = 0;
        if (array->ElemBytes < 4)
        {
            len = Array_Resize_Unit + size;
        } else if (array->ElemBytes < 8)
        {
            len = Array_Resize_Unit / 2 + size;
        } else
        {
            len = Array_Resize_Unit / 4 + size;
        }
        array->Data = (uint8_t *) realloc(array->Data, (array->Cap + len) * array->ElemBytes);
        array->Cap = array->Cap + len;
        return true;
    }
    return false;
}

/**
 * @brief Add an value to the array.
 *
 * @param array The array to add to.
 * @param value This is data to add to the array.
 * @param size The size of the data to add.
 */

bool Array_AddArray(Array_t *array, const uint8_t *value, int size)
{
    if (array != NULL)
    {
        if (array->Size + size > array->Cap)
        {
            if (!Array_Resize(array, size))
            {
                return false;
            }
        }
        for (int i = 0; i < size * array->ElemBytes; i++)
        {
            *(array->Data + array->Size * array->ElemBytes + i) = value[i];
        }
        array->Size += size;
        return true;
    }
    return false;
}

bool Array_AddArrayUint8(Array_t *array, uint8_t value, int index)
{
    if (array != NULL)
    {
        *(array->Data + array->Size * array->ElemBytes + index) = value;
        // array->Size += 1;
        return true;
    }
    return false;
}
/**
 * @brief Insert an value to the array.
 *
 * @param array The array to add to.
 * @param value This is data to add to the array.
 * @param size The size of the data to add.
 */
bool Array_Insert(Array_t *array, uint8_t *value, int size, int index)
{
    if (array != NULL)
    {
        if (array->Size + size > array->Cap)
        {
            if (!Array_Resize(array, size))
            {
                return false;
            }
        }
        if (index < 0 || index >= array->Size)
        {
            Array_PushArray(array, value, size);
            return true;
        }
        for (int i = array->Size * array->ElemBytes - 1; i >= index; i--)
        {
            array->Data[i + size * array->ElemBytes] = array->Data[i];
        }
        for (int i = 0; i < size * array->ElemBytes; i++)
        {
            array->Data[index * array->ElemBytes + i] = value[i];
        }
        array->Size += size;
        return true;
    }
    return false;
}
/**
 * @brief Remove an value to the array.
 *
 * @param array The array to remove to.
 * @param start The starting index.
 * @param end The ending index.
 */
bool Array_Remove(Array_t *array, int start, int end)
{
    if (array != NULL)
    {
        if (start < 0 || array->Size <= 0 || end < start || array->Size <= start)
        {
            return false;
        }
        if (array->Size < end)
        {
            end = array->Size;
        }
        int len = end - start;
        for (int i = start * array->ElemBytes; i < (array->Size - len) * array->ElemBytes; i++)
        {
            array->Data[i] = array->Data[i + len * array->ElemBytes];
        }
        array->Size = array->Size - len;
        return true;
    }
    return false;
}

#endif // ARRAY_ENABLE