/**
 * @RDE_HEADER@
 * $Id$
 * $HeadURL$
 * $Author$
 */

#include "LtsCommandLineParser.h"
#include <ngltools/ngltools_filesystem.h>
#include <QNetworkInterface>
#include <QFlags>
#include <QSettings>
#include <QUrl>

namespace LtsCommandLineParser
{
static constexpr int s_maxDomainId = 232;

LtsCommandLineParser::LtsCommandLineParser(ProvideCommandLineParameterOptions opts)
  : QCommandLineParser()
  , m_enabledOptions(opts)
{
  if (NGL::isAppInBuildBasePath() || m_enabledOptions.testFlag(CreateDomainIdFromIp))
  {
    const QList<QHostAddress> addresses = QNetworkInterface::allAddresses();
    for (const QHostAddress &address : addresses)
    {
      if (address.isLoopback() || address.isNull())
        continue;
      if (address.protocol() != QAbstractSocket::IPv4Protocol)
        continue;
      // use the lowest 8 bits (== last number in ip string) for domainId
      // domain id max = 250
      m_generatedDomainId = (address.toIPv4Address() & 0x000000ff) % 232;
      if (m_generatedDomainId == 0)
        m_generatedDomainId = s_maxDomainId;
      break;
    }
  }

  if (m_enabledOptions.testFlag(ExerciseId))
    addOption({{QStringLiteral("e"), QStringLiteral("exerciseid")},
               QStringLiteral("Default: -1 (invalid, get from lts-cc.conf)"),
               QStringLiteral("exerciseId"),
               QStringLiteral("-1")
              });
  if (m_enabledOptions.testFlag(DomainId))
    addOption({{QStringLiteral("d"), QStringLiteral("domainid")},
               QStringLiteral("Default: ") + QString::number(m_generatedDomainId),
               QStringLiteral("domainId"),
               QString::number(m_generatedDomainId)
              });
  if (m_enabledOptions.testFlag(CustomConfigFile))
  {
    const QString cf(NGL::findProjectConfigFile());
    addOption({{QStringLiteral("i"), QStringLiteral("ini")},
               QStringLiteral("Default: ") + cf,
               QStringLiteral("filename"),
               cf
              });
  }
  if (m_enabledOptions.testFlag(TcpConnectionUrl))
  {
    const QString defaultTcpUrl(QStringLiteral("EXCTDS01:7400"));
    addOption({{QStringLiteral("t"), QStringLiteral("tcpurl")},
               QStringLiteral("Default: ") + defaultTcpUrl,
               QStringLiteral("hostname:port"),
               defaultTcpUrl
              });
  }
  addHelpOption();

  if (!m_enabledOptions.testFlag(NoVersion))
    addVersionOption();
}

int LtsCommandLineParser::domainId() const
{
  if (m_domainId == 0 && m_generatedDomainId != 0 && !m_domainIdSetByFunction)
  {
#ifdef WIN32
    // no ansi escapes on windows ...
    fprintf(stdout, "\n\nAttention: using a default domain id != 0 because executable is run inside builddir - default domainid is %d\n\n", m_generatedDomainId);
#else
    fprintf(stdout, "\n\n\e[31mAttention: using a default domain id != 0 because executable is run inside builddir - default domainid is %d\e[0m\n\n", m_generatedDomainId);
#endif
    return m_generatedDomainId;
  }
  return m_domainId;
}

void LtsCommandLineParser::setDomainId(int id)
{
  m_domainIdSetByFunction = true;
  m_domainId = id;
}

bool LtsCommandLineParser::iniFileSet() const
{
  if (!m_enabledOptions.testFlag(CustomConfigFile))
    return false;
  return isSet(QStringLiteral("i"));
}

bool LtsCommandLineParser::useTcpConnection() const
{
  if (!m_enabledOptions.testFlag(TcpConnectionUrl))
    return false;
  return isSet(QStringLiteral("t"));
}

QUrl LtsCommandLineParser::tcpConnectionUrl() const
{
  if (!m_enabledOptions.testFlag(TcpConnectionUrl))
    return QUrl();
  if (!useTcpConnection())
    return QUrl();
  QString str = value(QStringLiteral("t"));
  // '_' is not allowed in a scheme, but rti needs it ...
  str.replace(QLatin1String("tcpv4_lan"), QLatin1String("tcpv4lan"));
  QUrl url = QUrl::fromUserInput(str);
  if (url.scheme() == QLatin1String("http") ||
      url.scheme() == QLatin1String("file"))
    url.setScheme(QStringLiteral("tcpv4lan"));
  return url;
}

bool LtsCommandLineParser::init(bool bParseHelp)
{
  if (!parse(QCoreApplication::arguments()))
  {
    fprintf(stdout, "\nBad option: %s \n", qPrintable(errorText()));
    if (!m_unitModuleTestMode)
      return false;
  }

  if (m_enabledOptions.testFlag(ExerciseId))
    m_exerciseId = value(QStringLiteral("e")).toInt();
  if (m_enabledOptions.testFlag(DomainId))
    m_domainId = value(QStringLiteral("d")).toInt();
  if (m_enabledOptions.testFlag(CustomConfigFile))
    m_iniFile = value(QStringLiteral("i"));

  if (bParseHelp && isSet(QStringLiteral("h")))
    showHelp();
  if (!m_unitModuleTestMode && isSet(QStringLiteral("v")))
    showVersion();
  if (!domainIdProvided())
  {
    const QString iniFile = m_iniFile.isEmpty() ? NGL::findProjectConfigFile() : m_iniFile;
    if (!iniFile.isEmpty())
    {
      QSettings s(iniFile, QSettings::IniFormat);
      bool bOk;
      int domainId = s.value(QStringLiteral("Global/DomainId"), m_domainId).toInt(&bOk);
      if (bOk && domainId > 0 && domainId <= s_maxDomainId)
        m_domainId = domainId;
    }
  }
  return true;
}

void LtsCommandLineParser::showHelp(int exitCode)
{
  if (!m_additionalHelpStr.isEmpty())
    fprintf(stdout, "%s", qPrintable(m_additionalHelpStr));
  //  fprintf(stdout, "\n\n\e[33m example OWS : %s -m -a0 -d1 -b legatus -t EXCTDS01:7400 -l de_DE \n\n\e[0m", QCoreApplication::arguments().at(0).toLatin1().data());

  QCommandLineParser::showHelp(exitCode);
}

bool LtsCommandLineParser::domainIdProvided() const
{
  if (!m_enabledOptions.testFlag(DomainId))
    return false;
  return isSet(QStringLiteral("d"));
}

bool LtsCommandLineParser::exerciseIdProvided() const
{
  if (!m_enabledOptions.testFlag(ExerciseId))
    return false;
  return isSet(QStringLiteral("e"));
}


} // namespace Common