// SPDX-License-Identifier: Apache-2.0
// Copyright (C) 2022-2023 chargebyte GmbH
// Copyright (C) 2022-2023 Contributors to EVerest
#ifndef TOOLS_H
#define TOOLS_H

#include <generated/types/evse_security.hpp>
#include <generated/types/iso15118.hpp>
#include <netinet/in.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string>
#include <sys/time.h>
#include <time.h>
#include <vector>

#define MAX_FILE_NAME_LENGTH 100
#define MAX_PKI_CA_LENGTH    4 /* leaf up to root certificate */

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif

#ifndef ROUND_UP
#define ROUND_UP(N, S) ((((N) + (S)-1) / (S)) * (S))
#endif

#ifndef ROUND_UP_ELEMENTS
#define ROUND_UP_ELEMENTS(N, S) (((N) + (S)-1) / (S))
#endif

int generate_random_data(void* dest, size_t dest_len);

enum Addr6Type {
    ADDR6_TYPE_UNPSEC = -1,
    ADDR6_TYPE_GLOBAL = 0,
    ADDR6_TYPE_LINKLOCAL = 1,
};

const char* choose_first_ipv6_interface();
int get_interface_ipv6_address(const char* if_name, enum Addr6Type type, struct sockaddr_in6* addr);

void set_normalized_timespec(struct timespec* ts, time_t sec, int64_t nsec);
struct timespec timespec_sub(struct timespec lhs, struct timespec rhs);
struct timespec timespec_add(struct timespec lhs, struct timespec rhs);
void timespec_add_ms(struct timespec* ts, long long msec);
long long timespec_to_ms(struct timespec ts);
long long int getmonotonictime(void);

/*!
 *  \brief calc_physical_value This function calculates the physical value consists on a value and multiplier.
 *  \param value is the value of the physical value
 *  \param multiplier is the multiplier of the physical value
 *  \return Returns the physical value
 */
double calc_physical_value(const int16_t& value, const int8_t& multiplier);

/**
 * \brief convert the given \p hash_algorithm to type types::iso15118::HashAlgorithm
 * \param hash_algorithm
 * \return types::iso15118::HashAlgorithm
 */
types::iso15118::HashAlgorithm convert_to_hash_algorithm(const types::evse_security::HashAlgorithm hash_algorithm);

/**
 * \brief convert the given \p ocsp_request_data_list to std::vector<types::iso15118::CertificateHashDataInfo>
 * \param ocsp_request_data_list
 * \return std::vector<types::iso15118::CertificateHashDataInfo>
 */
std::vector<types::iso15118::CertificateHashDataInfo>
convert_to_certificate_hash_data_info_vector(const types::evse_security::OCSPRequestDataList& ocsp_request_data_list);

/**
 * \brief convert bytes into a colon delimited string
 * \param[in] ptr - a pointer to the byte array
 * \param[in] len - the length of the byte array
 * \returns a string of hex digits separated by : or empty on error
 */

std::string to_mac_address_str(const uint8_t* ptr, size_t len);

/**
 * \brief Copy the content of \p src to the character array pointed by \p characters.
 * \param characters The destination buffer (array)
 * \param size_of_characters The size of the destination (must not be zero)
 * \param characters_len Pointer to the corresponding string length field in the destination struct.
 * \param src The source string to use.
 */
void strncpy_to_v2g(char* characters, size_t size_of_characters, uint16_t* characters_len, const std::string& src);

#endif /* TOOLS_H */