#include "XmlReader.h"

#include <NGLLogger/NGLLoggerBootstrap.h>

#include <QDirIterator>
#include <QFile>
#include <QDomDocument>
#include <QXmlStreamReader>
#include <ngltools/ngltools_filesystem.h>

using namespace CodeGen;


class XmlReaderException : public std::exception
{
public:
  explicit XmlReaderException(const QString &msg) noexcept
    : m_msg(msg.toUtf8())
  {}

  ~XmlReaderException() = default;

  virtual const char *what() const noexcept
  {
    return m_msg.data();
  }
private:
  const QByteArray m_msg;
};

XmlReader::XmlReader()
  : m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger().getNGLLogger("CodeGen.XmlReader"))
{}

bool XmlReader::readServiceFile(const QString &svcFile,
                                const QString &idlServiceInfoFile,
                                const XmlReader *parent)
{
  m_externalXmlInformations.clear();
  m_idlFiles.clear();
  m_xmlFiles.clear();
  m_usedServices.clear();
  m_fullServiceName2Abbreviation.clear();
  
  m_svcNamespace.clear();
  m_svcAbbr.clear();
  m_svcProcNames.clear();
  m_customRecordReplay = false;
  m_exerciseDependency = ExerciseDependency::Exercise;
  m_dbClassTables.clear();
  m_struct2BaseClass.clear();
  m_structsToGenerate.clear();
  m_idlStructsToGenerate.clear();
  m_tables.clear();
  m_views.clear();
  m_enumerations.clear();
  m_functionTopics.clear();
  m_externalTopicTypes.clear();
  m_customFunctions.clear();
  m_prio = 0;
  m_svcDevMode = false;

  
  if (parent)
  {
    m_idlFiles = parent->m_idlFiles;
    m_xmlFiles = parent->m_xmlFiles;
    m_fullServiceName2Abbreviation = parent->m_fullServiceName2Abbreviation;
    m_externalXmlInformations = parent->m_externalXmlInformations;
  }


  
  loadIdlInfofile(idlServiceInfoFile);

  
  QFile f(svcFile);
  if (!f.exists())
  {
    ERROR_LOG(m_logger) << "Service file '" << svcFile << "' not found!";
    return false;
  }
  if (!f.open(QIODevice::ReadOnly))
  {
    m_errorString = QLatin1String("Can not open service file '") + svcFile +
        QLatin1String("' for reading: ") + f.errorString();
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }

  INFO_LOG(m_logger) << "SvcFile: " << svcFile;

  
  QString errMsg;
  int errLine = 0;
  int errColumn = 0;
  QDomDocument doc;
  if (!doc.setContent(&f, &errMsg, &errLine, &errColumn))
  {
    m_errorString = QLatin1String("Error parsing service file '") + svcFile + QLatin1String("': ") +
        errMsg + QLatin1String(" at ") + QString::number(errLine) +
        QLatin1Char(':') + QString::number(errColumn);
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }
  
  
  
  
  
  
  
  
  QDomElement domRoot = doc.documentElement();
  if (!domRoot.hasAttribute(QStringLiteral("namespace")))
  {
    m_errorString = QLatin1String("Xml file '") + svcFile +
        QLatin1String("' is not a valid service file: service name/namespace is missing");
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }
  m_svcNamespace = getAttribute(domRoot, QStringLiteral("namespace"));
  m_svcAbbr = getAttribute(domRoot, QStringLiteral("abbreviation")).toLower();
  m_svcProcNames = getAttribute(domRoot, QStringLiteral("procNames")).split(QLatin1Char(','));
  m_customRecordReplay = getAttributeBool(domRoot, QStringLiteral("customRecordReplay"), true, false);

  QString devModeStr = getAttribute(domRoot, QStringLiteral("devMode"), true);
  m_svcDevMode = devModeStr == QStringLiteral("1") ||
      devModeStr == QStringLiteral("true");
  INFO_LOG(m_logger) << "devMode: " << m_svcDevMode;

  const QString groupNamesString = getAttribute(domRoot, QStringLiteral("groups"), true);
  if (!groupNamesString.isEmpty())
  {
    m_groupNames = groupNamesString.split(QLatin1Char(','), QString::SkipEmptyParts);
    INFO_LOG(m_logger) << "groups: " << groupNamesString;
  }
  else
    m_groupNames.clear();

  m_exerciseDependency = string2ExerciseDependency(getAttribute(domRoot, QStringLiteral("exerciseDependency"), true));
  
  
  
  if (m_groupNames.contains(QStringLiteral("Core")) ||
      m_groupNames.contains(QStringLiteral("Master")))
  {
    if (m_exerciseDependency != ExerciseDependency::Global &&
        m_exerciseDependency != ExerciseDependency::GlobalAndExercise)
    {
      WARNING_LOG(m_logger) << "Service " << getServiceNamespace()
                            << " is not marked as exercise independent but should be started in group Core/Master";
    }
  }

  INFO_LOG(m_logger) << "exerciseDependency: " << (int)m_exerciseDependency;
  if ( domRoot.hasAttribute(QStringLiteral("prio")))
  {
    m_prio = getAttribute(domRoot, QStringLiteral("prio"), 0).toInt();
  }
  try
  {
    parseDBSserviceStructs(domRoot.firstChildElement(QStringLiteral("dbServiceStructs")));
  }
  catch (const XmlReaderException &ex)
  {
    m_errorString = QLatin1String("Error parsing dbServiceStructs: ") + QLatin1String(ex.what());
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }

  try
  {
    parseDBTables(domRoot.firstChildElement(QStringLiteral("tables")));
  }
  catch (const XmlReaderException &ex)
  {
    m_errorString = QLatin1String("Error parsing dbtables: ") + QLatin1String(ex.what());
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }

  try
  {
    parseDBViews(domRoot.firstChildElement(QStringLiteral("views")));
  }
  catch (const XmlReaderException &ex)
  {
    m_errorString = QLatin1String("Error parsing dbviews: ") + QLatin1String(ex.what());
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }

  try
  {
    parseEnumerations(domRoot.firstChildElement(QStringLiteral("enumerations")));
  }
  catch (const XmlReaderException &ex)
  {
    m_errorString = QLatin1String("Error parsing enumerations: ") + QLatin1String(ex.what());
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }

  try
  {
    parseCustomDtcFunctions(domRoot.firstChildElement(QStringLiteral("customDtcFunctions")));
  }
  catch (const XmlReaderException &ex)
  {
    m_errorString = QLatin1String("Error parsing custom dtc functions: ") + QLatin1String(ex.what());
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }

  try
  {
    parseTopicTypes(domRoot.firstChildElement(QStringLiteral("topicTypes")));
  }
  catch (const XmlReaderException &ex)
  {
    m_errorString = QLatin1String("Error parsing idl strucs: ") + QLatin1String(ex.what());
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }

  try
  {
    parseFunctionTopics(domRoot.firstChildElement(QStringLiteral("functionTopics")));
  }
  catch (const XmlReaderException &ex)
  {
    m_errorString = QLatin1String("Error parsing function topics: ") + QLatin1String(ex.what());
    ERROR_LOG(m_logger) << m_errorString;
    return false;
  }

  return true;
}

QString XmlReader::getAttribute(const QDomElement &element,
                                const QString &attributeName,
                                bool bOptional)
{
  if (!element.hasAttribute(attributeName))
  {
    if (bOptional)
      return QString();
    throw XmlReaderException(QLatin1String("Element ") + element.tagName() +
                             QLatin1String(" has no attribute ") + attributeName);
  }
  return element.attribute(attributeName);
}

bool XmlReader::getAttributeBool(const QDomElement &element,
                                 const QString &attributeName,
                                 bool bOptional, bool defaultValue)
{
  QString str = getAttribute(element, attributeName, bOptional);
  if (str.isEmpty())
    return defaultValue;
  bool bOk;
  bool ret = (str.toInt(&bOk) != 0);
  if (!bOk)
    throw XmlReaderException(QLatin1String("Can not parse boolean value: ") + str);
  return ret;
}

int XmlReader::getAttributeInt(const QDomElement &element,
                               const QString &attributeName,
                               bool bOptional, int defaultValue)
{
  QString str = getAttribute(element, attributeName, bOptional);
  if (str.isEmpty())
    return defaultValue;
  bool bOk;
  int ret = str.toInt(&bOk);
  if (!bOk)
  {
    
    ret = str.toUInt(&bOk,16);
    if(!bOk)
      throw XmlReaderException(QLatin1String("Can not parse int value: ") + str);
  }
  return ret;
}

void XmlReader::parseDBSserviceStructs(const QDomElement &rootElement)
{
  if (rootElement.isNull())
    return;

  
  QDomElement domDbStruct = rootElement.firstChildElement(QStringLiteral("serviceStruct"));
  while (!domDbStruct.isNull())
  {
    ServiceStructInformation ssi;
    ssi.name = getAttribute(domDbStruct, QStringLiteral("name"));
    ssi.primaryTable = getAttribute(domDbStruct, QStringLiteral("table"));
    ssi.hasStaticContent = getAttributeBool(domDbStruct, QStringLiteral("static"), true, false);

    QDomElement domFunc = domDbStruct.firstChildElement(QStringLiteral("function"));
    while (!domFunc.isNull())
    {
      m_customFunctions += parseCustomFunction(domFunc, CustomServiceFunctionInformation::Type::Db);
      domFunc = domFunc.nextSiblingElement(domFunc.tagName());
    }

    QDomElement domNotify = domDbStruct.firstChildElement(QStringLiteral("notification"));
    while (!domNotify.isNull())
    {
      ssi.dbNotifications.append(parseDbNotification(domNotify));
      domNotify = domNotify.nextSiblingElement(domNotify.tagName());
    }

    m_structsToGenerate.push_back(ssi);

    domDbStruct = domDbStruct.nextSiblingElement(domDbStruct.tagName());
  }
  std::sort(m_structsToGenerate.begin(), m_structsToGenerate.end());

  
  domDbStruct = rootElement.firstChildElement(QStringLiteral("table"));
  while (!domDbStruct.isNull())
  {
    const QString table = getAttribute(domDbStruct, QStringLiteral("name"));
    const QString parentTable = getAttribute(domDbStruct, QStringLiteral("base"), true);
    m_struct2BaseClass[table] = parentTable;

    domDbStruct = domDbStruct.nextSiblingElement(domDbStruct.tagName());
  }
  INFO_LOG(m_logger) << "Read " << m_structsToGenerate.size() << " database service struct(s)";
}

void XmlReader::parseDBTables(const QDomElement &rootElement)
{
  if (rootElement.isNull())
    return;

  QDomElement domDbTable = rootElement.firstChildElement(QStringLiteral("table"));
  while (!domDbTable.isNull())
  {
    QSharedPointer<TableInformation> ti(new TableInformation);
    ti->name = getAttribute(domDbTable, QStringLiteral("name"));
    ti->structName = QLatin1String("t_") + ti->name;
    ti->comment = getAttribute(domDbTable, QStringLiteral("comment"), true);
    ti->exerciseDependency = string2ExerciseDependency(getAttribute(domDbTable, QStringLiteral("exerciseDependency"), true));

    QDomElement domColumn = domDbTable.firstChildElement(QStringLiteral("column"));
    while (!domColumn.isNull())
    {
      ti->plainColumns.append(parseTableColumn(domColumn, ti->name));
      domColumn = domColumn.nextSiblingElement(domColumn.tagName());
    }

    QDomElement domForeignKey = domDbTable.firstChildElement(QStringLiteral("foreignKey"));
    while (!domForeignKey.isNull())
    {
      ti->foreignKeys.append(parseForeignKey(domForeignKey));
      domForeignKey = domForeignKey.nextSiblingElement(domForeignKey.tagName());
    }
    QDomElement domConstraint = domDbTable.firstChildElement(QStringLiteral("constraint"));
    while (!domConstraint.isNull())
    {
      ti->constraints.append(parseConstraint(domConstraint));
      domConstraint = domConstraint.nextSiblingElement(domConstraint.tagName());
    }

    m_tables.insert(ti->name, ti);

    domDbTable = domDbTable.nextSiblingElement(domDbTable.tagName());
  }

  INFO_LOG(m_logger) << "Read " << m_tables.size() << " database table(s)";
}

void XmlReader::parseDBViews(const QDomElement &rootElement)
{
  if (rootElement.isNull())
    return;

  QDomElement domDbView = rootElement.firstChildElement(QStringLiteral("view"));
  while (!domDbView.isNull())
  {
    QSharedPointer<ViewInformation> vi(new ViewInformation);
    vi->name = getAttribute(domDbView, QStringLiteral("name"));
    vi->structName = QLatin1String("v_") + vi->name;
    vi->baseSchema = m_svcAbbr;
    vi->baseTable = getAttribute(domDbView, QStringLiteral("base"));
    vi->comment = getAttribute(domDbView, QStringLiteral("comment"), true);
    vi->filter = getAttribute(domDbView, QStringLiteral("filter"));
    vi->exerciseDependency = string2ExerciseDependency(getAttribute(domDbView, QStringLiteral("exerciseDependency"), true));

    DEBUG_LOG(m_logger) << "Base table = " << vi->baseTable;


    m_views.insert(vi->name, vi);

    domDbView = domDbView.nextSiblingElement(domDbView.tagName());
  }

  INFO_LOG(m_logger) << "Read " << m_views.size() << " database view(s)";
}

void XmlReader::parseEnumerations(const QDomElement &rootElement)
{
  if (rootElement.isNull())
    return;

  QDomElement domEnum = rootElement.firstChildElement(QStringLiteral("enumeration"));
  while (!domEnum.isNull())
  {
    EnumInformation enumeration;
    enumeration.serviceName = getServiceNamespace();
    enumeration.enumName = getAttribute(domEnum, QStringLiteral("name"));
    enumeration.tableName = getAttribute(domEnum, QStringLiteral("table"), true);

    QDomElement enumVal = domEnum.firstChildElement(QStringLiteral("attribute"));
    while (!enumVal.isNull())
    {
      EnumKeyValuePair evp;
      evp.key = getAttribute(enumVal, QStringLiteral("key"));
      evp.value = getAttributeInt(enumVal, QStringLiteral("value"));
      enumeration.values.append(evp);

      enumVal = enumVal.nextSiblingElement(enumVal.tagName());
    }

    m_enumerations.push_back(enumeration);

    domEnum = domEnum.nextSiblingElement(domEnum.tagName());
  }
  INFO_LOG(m_logger) << "Read " << m_enumerations.size() << " enumeration(s)";
}

void XmlReader::parseCustomDtcFunctions(const QDomElement &rootElement)
{
  if (rootElement.isNull())
    return;

  QDomElement domElement = rootElement.firstChildElement(QStringLiteral("customDtcFunction"));
  while (!domElement.isNull())
  {

    QDomElement domFunc = domElement.firstChildElement(QStringLiteral("function"));
    while (!domFunc.isNull())
    {
      m_customFunctions += parseCustomFunction(domFunc, CustomServiceFunctionInformation::Type::Dtc);
      domFunc = domFunc.nextSiblingElement(domFunc.tagName());
    }
    domElement = domElement.nextSiblingElement(domElement.tagName());
  }
  INFO_LOG(m_logger) << "Read " << m_enumerations.size() << " customDtcFunction(s)";
}



void XmlReader::parseTopicTypes(const QDomElement &rootElement)
{
  if (rootElement.isNull())
    return;

  
  QDomElement domIdlStruct = rootElement.firstChildElement(QStringLiteral("topicType"));
  while (!domIdlStruct.isNull())
  {
    TopicTypeInformation isi;
    isi.name          = getAttribute(domIdlStruct, QStringLiteral("name"));
    isi.baseValueType = getAttribute(domIdlStruct, QStringLiteral("baseValueType"), true);

    
    const QVector<QStringRef> sl = isi.baseValueType.splitRef(QStringLiteral("::"));
    if (sl.size() == 2)
      loadExternalTopicType(sl.at(0).toString(), sl.at(1).toString());

    const QString tmp = getAttribute(domIdlStruct, QStringLiteral("extensibility"), true);

    if (tmp.compare(QLatin1String("FINAL"), Qt::CaseInsensitive) == 0)     isi.extensibility = dds::core::xtypes::ExtensibilityKind::FINAL;
    if (tmp.compare(QLatin1String("MUTABLE"), Qt::CaseInsensitive) == 0)   isi.extensibility = dds::core::xtypes::ExtensibilityKind::MUTABLE;
    if (tmp.compare(QLatin1String("EXTENSIBLE"), Qt::CaseInsensitive) == 0) isi.extensibility = dds::core::xtypes::ExtensibilityKind::EXTENSIBLE;

    isi.comment         = getAttribute(domIdlStruct, QStringLiteral("comment"), true);
    isi.isDataObject    = getAttributeBool(domIdlStruct, QStringLiteral("isDataObject"), true, false);
    isi.dtsAutogen      = getAttributeBool(domIdlStruct, QStringLiteral("autogenDTS"), true, true);
    isi.dtcAutogen      = getAttributeBool(domIdlStruct, QStringLiteral("autogenDTC"), true, true);
    isi.recordTopic     = getAttributeBool(domIdlStruct, QStringLiteral("recordTopic"), true, false);
    isi.routeToClient   = getAttributeBool(domIdlStruct, QStringLiteral("routeToClient"), true, true);
    isi.routeToServer   = getAttributeBool(domIdlStruct, QStringLiteral("routeToServer"), true, false);
    isi.routeInReplay   = getAttributeBool(domIdlStruct, QStringLiteral("routeInReplay"), true, false);
    isi.autosubscribe   = getAttributeBool(domIdlStruct, QStringLiteral("autosubscribe"), true, true);

    QDomElement domColumn = domIdlStruct.firstChildElement(QStringLiteral("column"));
    while (!domColumn.isNull())
    {
      isi.columns.append(parseIdlStructColumn(domColumn));
      domColumn = domColumn.nextSiblingElement(domColumn.tagName());
    }

    
    m_idlStructsToGenerate.insert(isi.name, isi);

    domIdlStruct = domIdlStruct.nextSiblingElement(domIdlStruct.tagName());
  }


  INFO_LOG(m_logger) << "Read " << m_idlStructsToGenerate.size() << " idl struct(s)";
}

void XmlReader::parseFunctionTopics(const QDomElement &rootElement)
{
  if (rootElement.isNull())
    return;

  
  QDomElement domFunctionTopic = rootElement.firstChildElement(QStringLiteral("functionTopic"));
  while (!domFunctionTopic.isNull())
  {
    FunctionTopic ft;
    ft.name             = getAttribute(domFunctionTopic, QStringLiteral("name"));
    ft.requestTopicType = getAttribute(domFunctionTopic, QStringLiteral("requestTopicType"));
    ft.replyTopicType   = getAttribute(domFunctionTopic, QStringLiteral("replyTopicType"));
    ft.requestTopicName = getAttribute(domFunctionTopic, QStringLiteral("requestTopicName"));
    ft.replyTopicName   = getAttribute(domFunctionTopic, QStringLiteral("replyTopicName"));
    ft.routeInReplay    = getAttributeBool(domFunctionTopic, QStringLiteral("routeInReplay"), true, false);

    m_functionTopics.append(ft);

    domFunctionTopic = domFunctionTopic.nextSiblingElement(domFunctionTopic.tagName());
  }

  for (const FunctionTopic &ft : qAsConst(m_functionTopics))
  {
    const QVector<QStringRef> sl1 = ft.requestTopicType.splitRef(QStringLiteral("::"));
    if (sl1.size() == 2)
      loadExternalTopicType(sl1.at(0).toString(), sl1.at(1).toString());
    const QVector<QStringRef> sl2 = ft.replyTopicType.splitRef(QStringLiteral("::"));
    if (sl2.size() == 2)
      loadExternalTopicType(sl2.at(0).toString(), sl2.at(1).toString());
  }
}

ColumnInformation XmlReader::parseTableColumn(const QDomElement &column, const QString &tableName) const
{
  ColumnInformation ci;

  ci.columnName = getAttribute(column, QStringLiteral("name"));
  ci.datatype = getAttribute(column, QStringLiteral("datatype"));
  ci.defaultValue = getAttribute(column, QStringLiteral("default"), true);
  ci.comment = getAttribute(column, QStringLiteral("comment"), true);
  ci.isPrimaryKey = getAttributeBool(column, QStringLiteral("isPrimaryKey"), true, false);
  ci.isForeignKey = getAttributeBool(column, QStringLiteral("isForeignKey"), true, false);
  ci.isOptional = getAttributeBool(column, QStringLiteral("isOptional"), true, false);
  const QDomElement seq = column.firstChildElement(QStringLiteral("sequence"));
  if (!seq.isNull())
  {
    ci.sequenceStart = getAttributeInt(seq, QStringLiteral("start"), true, -1);
    ci.sequenceIncrement = getAttributeInt(seq, QStringLiteral("increment"), true, -1);
    ci.hasSequence = ci.sequenceStart >= 0 && ci.sequenceIncrement > 0;
  }

  if (ci.columnName.toLower() != ci.columnName)
    WARNING_LOG(m_logger) << "Column " << ci.columnName << " in Table "
                          << tableName << " has has upper-case chars which is not allowed!";

  return ci;
}

IdlColumnInformation XmlReader::parseIdlStructColumn(const QDomElement &column) const
{
  IdlColumnInformation ci;

  ci.name        = getAttribute(column, QStringLiteral("name"));
  ci.type        = getAttribute(column, QStringLiteral("idlType"));
  ci.comment     = getAttribute(column, QStringLiteral("comment"), true);
  ci.isKey       = getAttributeBool(column, QStringLiteral("isKey"), true, false);
  ci.isOptional  = getAttributeBool(column, QStringLiteral("isOptional"), true, false);
  ci.isTranslatable = getAttributeBool(column, QStringLiteral("isTranslatable"), true, false);

  return ci;
}

QSharedPointer<ForeignKeyInformation> XmlReader::parseForeignKey(const QDomElement &foreignKey) const
{
  QSharedPointer<ForeignKeyInformation> fk(new ForeignKeyInformation);

  fk->name = getAttribute(foreignKey, QStringLiteral("name"));
  
  const QString deleteAction = getAttribute(foreignKey, QStringLiteral("referential_integrity"), true);
  if (deleteAction == QLatin1String("DeleteNoAction"))
    fk->deleteAction = ForeignKeyInformation::OnDeleteAction::NoAction;
  else if (deleteAction == QLatin1String("DeleteCascade"))
    fk->deleteAction = ForeignKeyInformation::OnDeleteAction::Cascade;
  else if (deleteAction == QLatin1String("DeleteRestrict"))
    fk->deleteAction = ForeignKeyInformation::OnDeleteAction::Restrict;
  else if (deleteAction == QLatin1String("DeleteSetNull"))
    fk->deleteAction = ForeignKeyInformation::OnDeleteAction::SetNull;
  else if (deleteAction == QLatin1String("DeleteSetDefault"))
    fk->deleteAction = ForeignKeyInformation::OnDeleteAction::SetDefault;
  else
    fk->deleteAction = ForeignKeyInformation::OnDeleteAction::Cascade;  

  fk->source = parseForeignKeyEndpoint(fk->name, foreignKey.firstChildElement(QStringLiteral("source")));
  fk->destination = parseForeignKeyEndpoint(fk->name, foreignKey.firstChildElement(QStringLiteral("destination")));

  return fk;
}

ForeignKeyInformation::Endpoint XmlReader::parseForeignKeyEndpoint(const QString &foreignKeyName,
                                                                   const QDomElement &endpoint) const
{
  if (endpoint.isNull())
    throw XmlReaderException(QLatin1String("No endpoint for foreign key ") + foreignKeyName);

  ForeignKeyInformation::Endpoint fkEndpoint;

  fkEndpoint.service    = getAttribute(endpoint, QStringLiteral("service"), true);
  fkEndpoint.serviceAbbr= getAttribute(endpoint, QStringLiteral("serviceAbbr"), true);
  fkEndpoint.schema     = getAttribute(endpoint, QStringLiteral("schema"), true);
  fkEndpoint.tableName  = getAttribute(endpoint, QStringLiteral("table"));
  fkEndpoint.columnName = getAttribute(endpoint, QStringLiteral("column"));

  return fkEndpoint;
}

ConstraintInformation XmlReader::parseConstraint(const QDomElement &constraint) const
{
  ConstraintInformation ret;

  ret.name = getAttribute(constraint, QStringLiteral("name"), true);
  const QString type = getAttribute(constraint, QStringLiteral("type")).toLower();
  if (type == QLatin1String("unique"))
    ret.type = ConstraintInformation::Type::unique;
  else if (type == QLatin1String("index"))
    ret.type = ConstraintInformation::Type::index;

  QDomElement domColumn = constraint.firstChildElement(QStringLiteral("column"));
  if (domColumn.isNull())
    throw XmlReaderException(QLatin1String("No column for constraint") + ret.name);
  while (!domColumn.isNull())
  {
    ret.affectedColumns += getAttribute(domColumn, QStringLiteral("name"));
    domColumn = domColumn.nextSiblingElement(domColumn.tagName());
  }
  return ret;
}

CustomServiceFunctionInformation XmlReader::parseCustomFunction(const QDomElement &customFunc,
                                                                CustomServiceFunctionInformation::Type funcType) const
{
  CustomServiceFunctionInformation ret;
  ret.methodName = getAttribute(customFunc, QStringLiteral("name"));
  ret.returnValue = getAttribute(customFunc, QStringLiteral("returns"), true);
  ret.isConst = getAttributeBool(customFunc, QStringLiteral("isConst"), true, false);
  if (ret.returnValue.isEmpty())
    ret.returnValue = QStringLiteral("bool");
  QMap<int, QPair<QString, QString>> paramHelper;
  QDomElement domParam = customFunc.firstChildElement(QStringLiteral("parameter"));
  while (!domParam.isNull())
  {
    int pos = getAttributeInt(domParam, QStringLiteral("pos"));
    if (paramHelper.contains(pos))
      throw XmlReaderException(QLatin1String("Doubled position entry for custom function ") + ret.methodName);
    QString paramName          = getAttribute(domParam, QStringLiteral("name"));
    const QString paramType    = getAttribute(domParam, QStringLiteral("type"));
    const QString paramDefault = getAttribute(domParam, QStringLiteral("default"), true);
    if (!paramDefault.isEmpty())
      paramName.append(QLatin1String(" = ") + paramDefault);
    paramHelper[pos] = qMakePair(paramName, paramType);
    domParam = domParam.nextSiblingElement(domParam.tagName());

  }
  ret.paramNames.reserve(paramHelper.size());
  ret.paramTypes.reserve(paramHelper.size());
  ret.type = funcType;
  QStringList signature;
  for (auto it = paramHelper.constBegin(); it != paramHelper.constEnd(); ++it)
  {
    ret.paramNames += it.value().first;
    ret.paramTypes += it.value().second;
    QString tmp = it.value().second;
    if (!it.value().second.endsWith(QLatin1Char('&')))
      tmp += QLatin1Char(' ');
    tmp += it.value().first;
    signature += tmp;
  }
  ret.signature += signature.join(QStringLiteral(", "));
  return ret;
}

DbNotifcationInformation XmlReader::parseDbNotification(const QDomElement &customFunc) const
{
  DbNotifcationInformation ret(parseCustomFunction(customFunc, CustomServiceFunctionInformation::Type::DbNotify));

  const QString attribute(getAttribute(customFunc, QStringLiteral("notificationTypes")).toLower());
  const QStringList nfTypes = attribute.split(QLatin1Char(','));
  static const QMap<QString, DbNotifcationInformation::NotificationType> s_nfTypeMap =
  {
    { QLatin1String("beforeinsert"), DbNotifcationInformation::NotificationType::BeforeInsert },
    { QLatin1String("afterinsert"),  DbNotifcationInformation::NotificationType::AfterInsert },
    { QLatin1String("beforeupdate"), DbNotifcationInformation::NotificationType::BeforeUpdate },
    { QLatin1String("afterupdate"),  DbNotifcationInformation::NotificationType::AfterUpdate },
    { QLatin1String("beforedelete"), DbNotifcationInformation::NotificationType::BeforeDelete },
    { QLatin1String("afterdelete"),  DbNotifcationInformation::NotificationType::AfterDelete }
  };
  for (const QString &nfType : nfTypes)
  {
    const auto it = s_nfTypeMap.find(nfType);
    if (it == s_nfTypeMap.end())
      throw XmlReaderException(QStringLiteral("Can not find notification type %2 in type map for function %1").arg(ret.methodName, nfType));
    ret.notificationType += it.value();
  }
  if (ret.notificationType.isEmpty())
    throw XmlReaderException(QStringLiteral("Notification function '%1' without a valid notification type").arg(ret.methodName));
  if (ret.paramTypes.size() != 1)
    throw XmlReaderException(QStringLiteral("Notification function '%1' must have exactly one parameter").arg(ret.methodName));

  return ret;
}

TopicTypeInformation XmlReader::loadExternalTopicType(const QString &externalServiceName, const QString &topicTypeName)
{
  DEBUG_LOG(m_logger) << "externalServiceName: " << externalServiceName << ", topicTypeName: " << topicTypeName;

  if (!loadExternalService(externalServiceName))
  {
    WARNING_LOG(m_logger) << "Could not find service " << externalServiceName
                          << " referenced by external topic " << topicTypeName;
    return TopicTypeInformation();
  }
  auto extXmlReader = m_externalXmlInformations.value(externalServiceName);
  if (!extXmlReader)
  {
    ERROR_LOG(m_logger) << "Could not find service xml file for service '" << externalServiceName << "'";
    return TopicTypeInformation();
  }

  TopicTypeInformation tti = extXmlReader->getIdlStructInformation().value(topicTypeName);
  if (tti.isValid())
  {
    tti.name = externalServiceName + QLatin1String("::") + tti.name;
    m_externalTopicTypes += tti;
    m_usedServices[externalServiceName] = true;
    return tti;
  }
  WARNING_LOG(m_logger) << "Could not find topic " << topicTypeName
                        << " in external service definition for service "
                        << externalServiceName;
  return TopicTypeInformation();
}

EnumInformation XmlReader::getExternalEnumeration(const QString &externalServiceName, const QString &enumName, bool verbose)
{
  DEBUG_LOG(m_logger) << "externalServiceName: " << externalServiceName << ", topicTypeName: " << enumName;

  if (!loadExternalService(externalServiceName))
  {
    WARNING_LOG(m_logger) << "Could not find service '" << externalServiceName << "'"
                          << " referenced by external enumeration " << enumName;
    return EnumInformation();
  }
  auto extXmlReader = m_externalXmlInformations.value(externalServiceName);
  if (!extXmlReader)
  {
    ERROR_LOG(m_logger) << "Could not find service xml file for service '" << externalServiceName << "'";
    return EnumInformation();
  }

  const QVector<EnumInformation> enums = extXmlReader->getEnumerations();
  for (const EnumInformation &ei : enums)
  {
    if (ei.enumName == enumName)
    {
      m_usedServices[externalServiceName] = true;
      return ei;
    }
  }
  if (verbose)
  {
    WARNING_LOG(m_logger) << "Could not find enumeration " << enumName
                          << " in external service definition for '"
                          << externalServiceName << "'";
  }
  return EnumInformation();
}


bool XmlReader::loadExternalService(const QString &serviceName)
{
  if (serviceName == getServiceNamespace())
    return false;
  if (m_externalXmlInformations.contains(serviceName))
    return true;

  QString fileName = xmlFileForService(serviceName);
  if (fileName.isEmpty())
  {
    const QVector<QString> dirs = NGL::directories(NGL::FileType::ConfigFile);
    for (const QString &dirname : dirs)
    {
      QDirIterator dirIt(dirname + QStringLiteral("/xml"), QDir::Files | QDir::NoDotAndDotDot | QDir::Readable);
      while (dirIt.hasNext())
      {
        dirIt.next();
        if (!dirIt.fileName().endsWith(QLatin1String(".xml")))
          continue;

        fileName = dirIt.filePath();
        const QString svcNamespace = serviceNamespaceFromFile(fileName);
        if (svcNamespace == serviceName)
          break;
      }
    }
  }
  if (fileName.isEmpty())
    return false;

  DEBUG_LOG(m_logger) << "xml file for " << serviceName << ": " << fileName;
  auto extXmlReader = QSharedPointer<XmlReader>(new XmlReader);
  if (!extXmlReader->readServiceFile(fileName, QString(), this))
  {
    WARNING_LOG(m_logger) << "Error reading service file " << fileName
                          << " for service " << serviceName;
    return false;
  }
  m_externalXmlInformations[serviceName] = extXmlReader;
  if (!m_usedServices.contains(serviceName))
    m_usedServices[serviceName] = false;
  return true;
}

void XmlReader::loadIdlInfofile(const QString &idlServiceInfoFile)
{
  if (idlServiceInfoFile.isEmpty())
    return;
  QFile f(idlServiceInfoFile);
  if (!f.open(QIODevice::ReadOnly))
  {
    WARNING_LOG(m_logger) << "Could not read idl service info file " << idlServiceInfoFile;
    return;
  }
  const QList<QByteArray> files = f.readAll().split('\n');
  for (const QByteArray &filePath : files)
  {
    
    if (filePath.startsWith("--") || filePath.trimmed().isEmpty())
      continue;
    const QString fileName = QString::fromLocal8Bit(filePath.trimmed());
    const QVector<QStringRef> parts = fileName.splitRef(QLatin1Char('/'));
    getServiceNameInfoFromFilePath(parts);  
    const auto fn = parts.last().trimmed();
    if (fn.endsWith(QLatin1String(".xml")))
    {
      const auto svcAbbreveation = fn.split(QLatin1Char('.')).at(0).split(QLatin1Char('_')).at(0);
      m_xmlFiles[svcAbbreveation.toString()] = fileName;
      DEBUG_LOG(m_logger) << "xml: " << svcAbbreveation.toString() << " = " << fileName;
    }
    else
    {
      const auto svcAbbreveation = fn.split(QLatin1Char('.')).at(0).toString().toLower();
      if (svcAbbreveation.endsWith(QLatin1String("_enums")))
        continue;
      m_idlFiles[svcAbbreveation] = fileName;
      DEBUG_LOG(m_logger) << "idl: " << svcAbbreveation << " = " << fileName;
    }
  }
}

QString XmlReader::getIdlFileForService(const QMap<QString, QString> &data,
                                        const QString &serviceName) const
{
  const QString serviceAbbr = serviceNameAbbreviation(serviceName);
  return data.value(serviceAbbr);
}


QString XmlReader::serviceNameAbbreviation(const QString &serviceName) const
{
  return m_fullServiceName2Abbreviation.value(serviceName);
}

void XmlReader::getServiceNameInfoFromFilePath(const QVector<QStringRef> &parts)
{
  if (parts.size() < 2)
    return;

  
  const QString abbreviation = parts.last().split(QLatin1Char('.')).first().split(QLatin1Char('_')).first().toString();
  const QString serviceName = parts.at(parts.size() - 2).toString();
  DEBUG_LOG(m_logger) << "serviceName: " << serviceName << " = " << abbreviation;
  m_fullServiceName2Abbreviation[serviceName] = abbreviation;
}

ExerciseDependency XmlReader::string2ExerciseDependency(const QString &str)
{
  if (str.isEmpty())
    return ExerciseDependency::Undefined;
  const QStringList sd = str.toLower().split(QLatin1Char(','));
  int ret = ExerciseDependency::Undefined;
  for (const QString &s : sd)
  {
    if (s == QLatin1String("global"))
      ret |= ExerciseDependency::Global;
    else if (s == QLatin1String("exercise"))
      ret |= ExerciseDependency::Exercise;
    else if (s == QLatin1String("globalandexercise"))
      ret |= ExerciseDependency::GlobalAndExercise;
  }
  return static_cast<ExerciseDependency>(ret);
}

QString XmlReader::serviceNamespaceFromFile(const QString &fn)
{
  QFile f(fn);
  if (!f.open(QIODevice::ReadOnly))
    return QString();
  QXmlStreamReader sr(&f);
  while (!sr.atEnd())
  {
    sr.readNext();
    if (sr.isStartElement() && sr.name() == QLatin1String("service"))
      return (sr.attributes().value(QLatin1String("namespace"))).toString();
  }
  return QString();
}