/*
 * Copyright (C) 2014-2021 CZ.NIC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations including
 * the two.
 */

/*
 * This header file must not be included in other header files.
 *
 * Functions in this compilation unit serve for converting types
 * defined in libdatovka.
 */

#pragma once

#if defined(__APPLE__) || defined(__clang__)
#  define __USE_C99_MATH
#  define _Bool bool
#else /* !__APPLE__ */
#  include <cstdbool>
#endif /* __APPLE__ */

#include <QByteArray>
#include <QDate>
#include <QDateTime>
#include <QString>

#include "src/datovka_shared/isds/types.h"

namespace Isds {

	/*!
	 * @brief Converts C data into QByteArray.
	 *
	 * @param[in] cData C data pointer.
	 * @param[in] cSize Size of data.
	 * @return Byte array object, null byte array if NULL pointer or zero size was supplied.
	 */
	QByteArray fromCData(const void *cData, size_t cSize);

	/*!
	 * @brief Creates a C data copy from the supplied QBYteArray.
	 *
	 * @param[in,out] cDataPtr Pointer to C data.
	 * @param[in,out] cSize Size value to be set.
	 * @param[in] data Data object.
	 * @return True on success, false on failure.
	 */
	bool toCDataCopy(void **cDataPtr, size_t *cSize,
	    const QByteArray &data);

	/*!
	 * @brief Converts a C-string into QString.
	 *
	 * @param[in] cStr C string.
	 * @return String object, null string if NULL pointer was supplied.
	 */
	QString fromCStr(const char *cStr);

	/*!
	 * @brief Creates a C-string copy to the supplied QString.
	 *
	 * @param[in,out] cStrPtr Pointer to C string.
	 * @param[in] str String object.
	 * @return True on success, false in failure.
	 */
	bool toCStrCopy(char **cStrPtr, const QString &str);

	/*!
	 * @brief Converts date from struct tm.
	 *
	 * @param[in] cDate Struct tm containing date.
	 * @return Date object, null date if NULL pointer was supplied.
	 */
	QDate dateFromStructTM(struct tm *cDate);

	/*!
	 * @brief Creates a struct tm copy of the supplied QDate.
	 *
	 * @param[in,out] cDatePtr Address of pointer to struct tm.
	 * @param[in] date Date object.
	 * @return True on success, false in failure.
	 */
	bool toCDateCopy(struct tm **cDatePtr, const QDate &date);

	/*!
	 * @brief Converts date and time from struct timeval.
	 *
	 * @param[in] cDateTime Struct timeval containing date and time.
	 * @return Datetime object, null datetime if NULL pointer was supplied.
	 */
	QDateTime dateTimeFromStructTimeval(struct timeval *cDateTime);

	/*!
	 * @brief Creates a struct timeval copy of the supplied QDateTime.
	 *
	 * @param[in,out] cDateTimePtr Address of pointer to struct tm.
	 * @param[in] dateTime Date object.
	 * @return True on success, false in failure.
	 */
	bool toCDateTimeCopy(struct timeval **cDateTimePtr,
	    const QDateTime &dateTime);

	/*!
	 * @brief Convert from long int.
	 *
	 * @param[in] cLongPtr Pointer to long.
	 * @return -1 if NULL pointer supplied as parameter.
	 */
	qint64 fromLongInt(const long int *cLongPtr);

	/*!
	 * @brief Creates a long int from supplied number.
	 *
	 * @note Negative integers cause the pointer to be set to NULL.
	 *
	 * @param[in,out] cLongPtr Pointer to long int.
	 * @param[in] i Integerer.
	 * @return True on success, false in failure.
	 */
	bool toLongInt(long int **cLongPtr, qint64 i);

	/*!
	 * @brief Converts internal pointer to bool.
	 *
	 * @param[in] cBoolPtr Pointer to bool.
	 * @return Nullable bool enumeration type.
	 */
	enum Type::NilBool fromBoolPtr(const _Bool *cBoolPtr);

	/*!
	 * @brief Sets bool pointer according to supplied value.
	 *
	 * @param[in,out] cBoolPtr Bool pointer to be set.
	 * @param[in] nilBool Nullable bool value.
	 * @return True on success, false in failure.
	 */
	bool toBoolPtr(_Bool **cBoolPtr, enum Type::NilBool nilBool);

	/*!
	 * @brief Converts string to non-negative integer.
	 *
	 * @param[in]  str String containing non-negative number.
	 * @param[out] ok Set to true if string contains non-negative number.
	 * @return Non-negative number if string contains a non-negative number.
	 *     -1 if string is empty or on error.
	 */
	qint64 string2NonNegativeLong(const QString &str, bool *ok);

	/*!
	 * @brief Converts integer to string. Negative values result in null
	 *     string.
	 *
	 * @param[in] num Number to be converted to string.
	 * @return String with decimal number representation.
	 *     Null string if supplied value is negative.
	 */
	QString nonNegativeLong2String(qint64 num);
}
