/*! \file pijson.h
 * \ingroup Serialization
 * \brief
 * \~english JSON serialization
 * \~russian Сериализация JSON
 */
/*
    PIP - Platform Independent Primitives
    JSON serialization
    Ivan Pelipenko peri4ko@yandex.ru

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PIJSONSERIALIZATION_H
#define PIJSONSERIALIZATION_H

#include "pijson.h"


// ---
// serialize, PIJSON = piSerializeJSON(T)
// ---


// enum & arithmetic

template<typename T, typename std::enable_if<std::is_enum<T>::value, int>::type = 0>
inline PIJSON piSerializeJSON(const T & v) {
    return PIJSON() = (int)v;
}

template<typename T,
         typename std::enable_if<!std::is_enum<T>::value, int>::type      = 0,
         typename std::enable_if<std::is_arithmetic<T>::value, int>::type = 0>
inline PIJSON piSerializeJSON(const T & v) {
    return PIJSON() = v;
}

template<typename T,
         typename std::enable_if<!std::is_enum<T>::value, int>::type       = 0,
         typename std::enable_if<!std::is_arithmetic<T>::value, int>::type = 0>
inline PIJSON piSerializeJSON(const T & v) {
	static_assert(std::is_enum<T>::value || std::is_arithmetic<T>::value,
				  "[piSerializeJSON] Error: using undeclared piSerializeJSON() for complex type!");
	return {};
}


// known types

template<>
inline PIJSON piSerializeJSON(const PIVariant & v) {
	return PIJSON() = v;
}
template<typename T>
inline PIJSON piSerializeJSON(const complex<T> & v) {
	PIJSON ret;
	ret << v.real() << v.imag();
	return ret;
}

template<typename T>
inline PIJSON piSerializeJSON(const PIFlags<T> & v) {
	return PIJSON() = (int)v;
}

template<>
inline PIJSON piSerializeJSON(const PIString & v) {
	return PIJSON() = v;
}

template<>
inline PIJSON piSerializeJSON(const PIConstChars & v) {
	return PIJSON() = v.toString();
}

template<>
inline PIJSON piSerializeJSON(const PIByteArray & v) {
	return PIJSON() = PIStringAscii(v.toBase64());
}

template<>
inline PIJSON piSerializeJSON(const PISystemTime & v) {
	PIJSON ret;
	ret["s"]  = v.seconds;
	ret["ns"] = v.nanoseconds;
	return ret;
}

template<>
inline PIJSON piSerializeJSON(const PITime & v) {
	PIJSON ret;
	ret["h"] = v.hours;
	ret["m"] = v.minutes;
	ret["s"] = v.seconds;
	ret["z"] = v.milliseconds;
	return ret;
}

template<>
inline PIJSON piSerializeJSON(const PIDate & v) {
	PIJSON ret;
	ret["y"] = v.year;
	ret["M"] = v.month;
	ret["d"] = v.day;
	return ret;
}

template<>
inline PIJSON piSerializeJSON(const PIDateTime & v) {
	PIJSON ret;
	ret["y"] = v.year;
	ret["M"] = v.month;
	ret["d"] = v.day;
	ret["h"] = v.hours;
	ret["m"] = v.minutes;
	ret["s"] = v.seconds;
	ret["z"] = v.milliseconds;
	return ret;
}

template<>
inline PIJSON piSerializeJSON(const PINetworkAddress & v) {
	return PIJSON() = v.toString();
}

template<typename T>
inline PIJSON piSerializeJSON(const PIPoint<T> & v) {
	PIJSON ret;
	ret["x"] = piSerializeJSON(v.x);
	ret["y"] = piSerializeJSON(v.y);
	return ret;
}

template<typename T>
inline PIJSON piSerializeJSON(const PILine<T> & v) {
	PIJSON ret;
	ret["p0"] = piSerializeJSON(v.p0);
	ret["p1"] = piSerializeJSON(v.p1);
	return ret;
}

template<typename T>
inline PIJSON piSerializeJSON(const PIRect<T> & v) {
	PIJSON ret;
	ret["bl"] = piSerializeJSON(v.bottomLeft());
	ret["tr"] = piSerializeJSON(v.topRigth());
	return ret;
}


// containers

template<typename T1, typename T2>
inline PIJSON piSerializeJSON(const PIPair<T1, T2> & v) {
	PIJSON ret;
	ret << piSerializeJSON(v.first) << piSerializeJSON(v.second);
	return ret;
}

template<typename T>
inline PIJSON piSerializeJSON(const PIVector<T> & v) {
	if (v.isEmpty()) return PIJSON::newArray();
	PIJSON ret;
	for (const auto & i: v)
		ret << piSerializeJSON(i);
	return ret;
}

template<typename T>
inline PIJSON piSerializeJSON(const PIDeque<T> & v) {
	if (v.isEmpty()) return PIJSON::newArray();
	PIJSON ret;
	for (const auto & i: v)
		ret << piSerializeJSON(i);
	return ret;
}

template<typename T>
inline PIJSON piSerializeJSON(const PIVector2D<T> & v) {
	PIJSON ret;
	ret["cols"] = static_cast<uint>(v.cols());
	ret["rows"] = static_cast<uint>(v.rows());
	ret["mat"]  = piSerializeJSON(v.plainVector());
	return ret;
}

template<typename T>
inline PIJSON piSerializeJSON(const PISet<T> & v) {
	if (v.isEmpty()) return PIJSON::newArray();
	PIJSON ret;
	for (const auto & i: v)
		ret << piSerializeJSON(i);
	return ret;
}

template<typename K, typename T>
inline PIJSON piSerializeJSON(const PIMap<K, T> & v) {
	if (v.isEmpty()) return PIJSON::newObject();
	PIJSON ret;
	auto it = v.makeIterator();
	while (it.next())
		ret[PIVariant(it.key()).toString()] = piSerializeJSON(it.value());
	return ret;
}


// ---
// deserialize, piDeserializeJSON(T, PIJSON)
// ---


// enum & arithmetic

template<typename T, typename std::enable_if<std::is_enum<T>::value, int>::type = 0>
inline void piDeserializeJSON(T & v, const PIJSON & js) {
    v = (T)js.toInt();
}

template<typename T,
         typename std::enable_if<!std::is_enum<T>::value, int>::type      = 0,
         typename std::enable_if<std::is_arithmetic<T>::value, int>::type = 0>
inline void piDeserializeJSON(T & v, const PIJSON & js) {
    v = js.value().value<T>();
}

template<typename T,
         typename std::enable_if<!std::is_enum<T>::value, int>::type       = 0,
         typename std::enable_if<!std::is_arithmetic<T>::value, int>::type = 0>
inline void piDeserializeJSON(T & v, const PIJSON & js) {
	static_assert(std::is_enum<T>::value || std::is_arithmetic<T>::value,
				  "[piDeserializeJSON] Error: using undeclared piDeserializeJSON() for complex type!");
	v = {};
}


// known types

template<>
inline void piDeserializeJSON(PIVariant & v, const PIJSON & js) {
	v = js.value();
}

template<typename T>
inline void piDeserializeJSON(complex<T> & v, const PIJSON & js) {
	if (!js.isArray()) return;
	piDeserializeJSON(reinterpret_cast<T(&)[2]>(v)[0], js[0]);
	piDeserializeJSON(reinterpret_cast<T(&)[2]>(v)[1], js[1]);
}

template<typename T>
inline void piDeserializeJSON(PIFlags<T> & v, const PIJSON & js) {
	v = js.toInt();
}

template<>
inline void piDeserializeJSON(PIString & v, const PIJSON & js) {
	v = js.toString();
}

template<>
inline void piDeserializeJSON(PIByteArray & v, const PIJSON & js) {
	v = PIByteArray::fromBase64(js.toString());
}

template<>
inline void piDeserializeJSON(PISystemTime & v, const PIJSON & js) {
	piDeserializeJSON(v.seconds, js["s"]);
	piDeserializeJSON(v.nanoseconds, js["ns"]);
}

template<>
inline void piDeserializeJSON(PITime & v, const PIJSON & js) {
	v.hours        = js["h"].toInt();
	v.minutes      = js["m"].toInt();
	v.seconds      = js["s"].toInt();
	v.milliseconds = js["z"].toInt();
}

template<>
inline void piDeserializeJSON(PIDate & v, const PIJSON & js) {
	v.year  = js["y"].toInt();
	v.month = js["M"].toInt();
	v.day   = js["d"].toInt();
}

template<>
inline void piDeserializeJSON(PIDateTime & v, const PIJSON & js) {
	v.year         = js["y"].toInt();
	v.month        = js["M"].toInt();
	v.day          = js["d"].toInt();
	v.hours        = js["h"].toInt();
	v.minutes      = js["m"].toInt();
	v.seconds      = js["s"].toInt();
	v.milliseconds = js["z"].toInt();
}

template<>
inline void piDeserializeJSON(PINetworkAddress & v, const PIJSON & js) {
	v = PINetworkAddress(js.toString());
}

template<typename T>
inline void piDeserializeJSON(PIPoint<T> & v, const PIJSON & js) {
	piDeserializeJSON(v.x, js["x"]);
	piDeserializeJSON(v.y, js["y"]);
}

template<typename T>
inline void piDeserializeJSON(PILine<T> & v, const PIJSON & js) {
	piDeserializeJSON(v.p0, js["p0"]);
	piDeserializeJSON(v.p1, js["p1"]);
}

template<typename T>
inline void piDeserializeJSON(PIRect<T> & v, const PIJSON & js) {
	PIPoint<T> bl, tr;
	piDeserializeJSON(bl, js["bl"]);
	piDeserializeJSON(tr, js["tr"]);
	v = PIRect<T>(bl, tr);
}


// containers

template<typename T1, typename T2>
inline void piDeserializeJSON(PIPair<T1, T2> & v, const PIJSON & js) {
	v = {};
	if (!js.isArray()) return;
	piDeserializeJSON(v.first, js[0]);
	piDeserializeJSON(v.second, js[1]);
}

template<typename T>
inline void piDeserializeJSON(PIVector<T> & v, const PIJSON & js) {
	v.clear();
	if (!js.isArray()) return;
	v.resize(js.size());
	for (int i = 0; i < js.size(); ++i)
		piDeserializeJSON(v[i], js[i]);
}

template<typename T>
inline void piDeserializeJSON(PIDeque<T> & v, const PIJSON & js) {
	v.clear();
	if (!js.isArray()) return;
	v.resize(js.size());
	for (int i = 0; i < js.size(); ++i)
		piDeserializeJSON(v[i], js[i]);
}

template<typename T>
inline void piDeserializeJSON(PIVector2D<T> & v, const PIJSON & js) {
	v.clear();
	if (!js.isObject()) return;
	const auto & mat(js["mat"]);
	if (!mat.isArray()) return;
	piDeserializeJSON(v.plainVector(), mat);
	v.resize(js["rows"].toInt(), js["cols"].toInt());
}

template<typename T>
inline void piDeserializeJSON(PISet<T> & v, const PIJSON & js) {
	v.clear();
	if (!js.isArray()) return;
	T _t;
	for (int i = 0; i < js.size(); ++i) {
		piDeserializeJSON(_t, js[i]);
		v << _t;
	}
}

template<typename K, typename T>
inline void piDeserializeJSON(PIMap<K, T> & v, const PIJSON & js) {
	v.clear();
	if (!js.isObject()) return;
	const auto & obj(js.object());
	auto it = obj.makeIterator();
	while (it.next())
		piDeserializeJSON(v[PIVariant(it.key()).value<K>()], it.value());
}


// ---
// PIJSON static wrapper
// ---


template<typename T>
PIJSON PIJSON::serialize(const T & v) {
	return piSerializeJSON(v);
}

template<typename T>
T PIJSON::deserialize(const PIJSON & json) {
	T ret;
	piDeserializeJSON(ret, json);
	return ret;
}


#endif // PIJSONSERIALIZATION_H