/**
  * Telegrams at WsTelegram
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Christian Ehrlicher, NLE, 2019-09-18
  */

#include "ws_telegrams.h"

#include <QJsonDocument>
#include <QJsonObject>

namespace HighLevelArchitecture
{
//
// Helpers
//
JsonException::JsonException(const QJsonObject &obj, const QString &key)
  : m_obj(obj)
  , m_key(key)
  , m_what("Could not find key '" + key.toUtf8() + "' in json ('" + QJsonDocument(obj).toJson(QJsonDocument::Compact) + "')")
{}

template <typename E>
QJsonValue enumToJson(E e)
{
  static_assert (std::is_enum<E>::value, "Only useable with enumerations");
  return static_cast<int>(e);
}

template <typename T>
bool get(const QJsonObject &obj, const QString &key, T &val, bool bOptional = false)
{
  if (bOptional)
  {
    try
    {
      val = T::fromJson(obj[key].toObject());
    }
    catch (const JsonException &e)
    {
      Q_UNUSED(e);
      return false;
    }
  }
  else
    val = T::fromJson(obj[key].toObject());
  return true;
}

// POD getter
template <>
bool get(const QJsonObject &obj, const QString &key, bool &val, bool bOptional)
{
  const auto jVal = obj[key];
  if (!jVal.isBool())
  {
    if (bOptional)
      return false;
    throw JsonException(obj, key);
  }
  val = jVal.toBool();
  return true;
}

template <>
bool get(const QJsonObject &obj, const QString &key, int &val, bool bOptional)
{
  const auto jVal = obj[key];
  if (!jVal.isDouble())
  {
    if (bOptional)
      return false;
    throw JsonException(obj, key);
  }
  val = jVal.toInt();
  return true;
}

template <>
bool get(const QJsonObject &obj, const QString &key, double &val, bool bOptional)
{
  const auto jVal = obj[key];
  if (!jVal.isDouble())
  {
    if (bOptional)
      return false;
    throw JsonException(obj, key);
  }
  val = jVal.toDouble();
  return true;
}

template <>
bool get(const QJsonObject &obj, const QString &key, QString &val, bool bOptional)
{
  const auto jVal = obj[key];
  if (!jVal.isString())
  {
    if (bOptional)
      return false;
    throw JsonException(obj, key);
  }
  val = jVal.toString();
  return true;
}

//
// enum getter
//
// FinalAttackHeadingMode
template <>
bool get(const QJsonObject &obj, const QString &key, FinalAttackHeadingMode &val, bool bOptional)
{
  int iVal;
  get(obj, key, iVal, bOptional);
  switch (static_cast<FinalAttackHeadingMode>(iVal))
  {
  case FinalAttackHeadingMode::None:
  case FinalAttackHeadingMode::HeadingOnly:
  case FinalAttackHeadingMode::HeadingWithSector:
    val = static_cast<FinalAttackHeadingMode>(iVal);
    return true;
  }
  throw JsonException(obj, key);
}

//
// GeoPosition2D
//
QJsonObject GeoPosition2D::toJson() const
{
  return QJsonObject({{QStringLiteral("lat"), lat},
                      {QStringLiteral("lon"), lon},
                     });
}

GeoPosition2D GeoPosition2D::fromJson(const QJsonObject &obj)
{
  GeoPosition2D ret;
  get(obj, QStringLiteral("lat"), ret.lat);
  get(obj, QStringLiteral("lon"), ret.lon);
  return ret;
}


//
// GeoPosition3D
//
QJsonObject GeoPosition3D::toJson() const
{
  return QJsonObject({{QStringLiteral("lat"), lat},
                      {QStringLiteral("lon"), lon},
                      {QStringLiteral("height"), height},
                     });
}

GeoPosition3D GeoPosition3D::fromJson(const QJsonObject &obj)
{
  GeoPosition3D ret;
  get(obj, QStringLiteral("lat"), ret.lat);
  get(obj, QStringLiteral("lon"), ret.lon);
  get(obj, QStringLiteral("height"), ret.height);
  return ret;
}


//
// Area2D
//
QJsonObject Area2D::toJson() const
{
  return QJsonObject({{QStringLiteral("width"), width},
                      {QStringLiteral("height"), height},
                      {QStringLiteral("centerPoint"), centerPoint.toJson()},
                     });
}

Area2D Area2D::fromJson(const QJsonObject &obj)
{
  Area2D ret;
  get(obj, QStringLiteral("width"), ret.width, true);       // optional
  get(obj, QStringLiteral("height"), ret.height, true);     // optional
  get(obj, QStringLiteral("centerPoint"), ret.centerPoint);
  return ret;
}


//
// WsTelegramPosition
//
QJsonObject WsTelegramPosition::toJson() const
{
  return QJsonObject({{QStringLiteral("objectId"), objectId},
                      {QStringLiteral("name"), name},
                      {QStringLiteral("timestamp"), timestamp},
                      {QStringLiteral("position"), position.toJson()},
                     });
}

WsTelegramPosition WsTelegramPosition::fromJson(const QJsonObject &obj)
{
  WsTelegramPosition ret;
  get(obj, QStringLiteral("objectId"), ret.objectId);
  get(obj, QStringLiteral("name"), ret.name);
  get(obj, QStringLiteral("timestamp"), ret.timestamp);
  get(obj, QStringLiteral("position"), ret.position);
  return ret;
}


//
// WsTelegramRemoveAesObject
//
QJsonObject WsTelegramRemoveAesObject::toJson() const
{
  return QJsonObject({{QStringLiteral("objectId"), objectId},
                      {QStringLiteral("name"), name},
                      {QStringLiteral("timestamp"), timestamp},
                     });
}

WsTelegramRemoveAesObject WsTelegramRemoveAesObject::fromJson(const QJsonObject &obj)
{
  WsTelegramRemoveAesObject ret;
  get(obj, QStringLiteral("objectId"), ret.objectId);
  get(obj, QStringLiteral("name"), ret.name);
  get(obj, QStringLiteral("timestamp"), ret.timestamp);
  return ret;
}

//
// WsTelegramMineFieldObject
//
QJsonObject WsTelegramMineFieldObject::toJson() const
{
  return QJsonObject({{QStringLiteral("objectId"), objectId},
                      {QStringLiteral("name"), name},
                      {QStringLiteral("timestamp"), timestamp},
                      {QStringLiteral("activationTime"), activationTime},
                      {QStringLiteral("isDeactivated"), isDeactivated},
                      {QStringLiteral("duration"), duration},
                      {QStringLiteral("area2D"), area2D.toJson()}
                     });
}

WsTelegramMineFieldObject WsTelegramMineFieldObject::fromJson(const QJsonObject &obj)
{
  WsTelegramMineFieldObject ret;
  get(obj, QStringLiteral("objectId"), ret.objectId);
  get(obj, QStringLiteral("name"), ret.name);
  get(obj, QStringLiteral("timestamp"), ret.timestamp);
  get(obj, QStringLiteral("activationTime"), ret.activationTime);
  get(obj, QStringLiteral("isDeactivated"), ret.isDeactivated);
  get(obj, QStringLiteral("duration"), ret.duration);
  get(obj, QStringLiteral("area2D"), ret.area2D);
  return ret;
}

} // namespace HighLevelArchitecture