#pragma once
/** Sysvars library
 * Copyright (c) 2018-2024 Pavel Brychta, pablo@xpablo.cz
 *
 * Key-value store/load library with JSON file using internal filesystem
 **/

#include <Arduino.h>

enum {
    SV_OK = 0,
    SV_UNSPECIFIED_ERROR = -1,
    SV_FILE_NOT_FOUND = -2,
    SV_DESERIALIZE_ERROR = -3,
    SV_WRONG_DATA_TYPE = -4,
    SV_FILE_WRITE_ERROR = -5,
    SV_KEY_NOT_FOUND = -6,
};

/**
 * @brief      Get value
 *
 * @param[in]  name    Name of the key
 * @param      deflt   Default value
 *
 * @tparam     T       result type
 *
 * @return     Value for the key given
 */
template <typename T>
T svGetV(const String & name, const T deflt = {});

/**
 * @brief      Get value
 *
 * @param[in]  name    Name of the key
 * @param[in]  fname   Used JSON file name
 * @param      deflt   Default value
 *
 * @tparam     T       Result type
 *
 * @return     Value for the key given
 */
template <typename T>
T svGetVFile(const String & name, const String & fname, const T deflt = {});

/**
 * @brief      Store value for the key
 *
 * @param[in]  name   Key name
 * @param[in]  value  New value
 *
 * @tparam     T      Type of the value
 *
 * @return     Result (SV_...)
 */
template <typename T>
int svSetV(const String & name, T value);

/**
 * @brief      Store value for the key
 *
 * @param[in]  name   Key name
 * @param[in]  value  New value
 * @param[in]  fname  JSON file name
 *
 * @tparam     T      Type of the value
 *
 * @return     Result (SV_...)
 */
template <typename T>
int svSetVFile(const String & name, T value, const String & fname);