#include "PresetManager.h"

#include <QInputDialog>
#include <QApplication>
#include <QDebug>

#ifdef Q_OS_WIN
  static QString newLine(QStringLiteral("\r\n"));
#else
  static QString newLine(QStringLiteral("\n"));
#endif

PresetManager::PresetManager()
  : QObject()
{
  QString filename(QStringLiteral("%1.conf").arg(QApplication::arguments().at(0)));
  file.setFileName(filename);

  bool goCreateFile = false;
  if (!file.exists())
  {
    goCreateFile = true;
  }

  if (!file.open(QIODevice::ReadWrite))
  {
    //qWarning() << "cannot read/write conf file! ("<<filename<<")";
    return;
  }

  if (goCreateFile)
  {
    addDefaultPreset();
    createFile();
    savePresets(); // add default preset to new file
  }

  // read file...
  QString presetString(QString::fromUtf8(file.readLine(32000)));
  while (!presetString.isEmpty())
  {
    if (presetString.endsWith(newLine))
    {
      presetString.truncate(presetString.length() - newLine.length());
    }

    if (presetString.at(0) == QLatin1Char('#')) // allow comments
    {
      //qWarning() << "line is comment line! next line..";
      presetString = QString::fromUtf8(file.readLine(32000));
      continue;
    }

    QStringList presetStringList = presetString.split(QStringLiteral(":"));

    if (presetStringList.count() != 2)
    {
      //qWarning() << "line ded! next line..";
      presetString = QString::fromUtf8(file.readLine(32000));
      continue;
    }

    Preset preset;
    preset.name = presetStringList.at(0);

    QStringList presetValueList = presetStringList.at(1).split(QStringLiteral(","));

    if (presetValueList.count() < 5) // port is optional, as there is a default port !!
    {
      //qWarning() << "too few valz! next line..";
      presetString = QString::fromUtf8(file.readLine(32000));
      continue;
    }

    preset.loginData.database = presetValueList.at(0);
    preset.loginData.username = presetValueList.at(1);
    preset.loginData.password = presetValueList.at(2);
    preset.loginData.hostname = presetValueList.at(3);
    preset.loginData.driver   = presetValueList.at(4);

    if (presetValueList.count() > 5) // is there a port?
      preset.loginData.port = presetValueList.at(5).toInt();

    // keep compatibility
    if (presetValueList.count() > 6) // is there a filename?
      preset.loginData.filename = presetValueList.at(6);

    presetList.append(preset);
    presetString = QString::fromUtf8(file.readLine(32000));
  }
}

const PresetManager::PresetList &PresetManager::getPresetList() const
{
  return presetList;
}


void PresetManager::savePreset(const LoginData &loginData, QWidget* parent)
{
  bool ok;
  QString presetName = QInputDialog::getText(parent, tr("Save new Preset as.."),
                                             tr("Preset name:"), QLineEdit::Normal,
                                             QString(), &ok);

  if (!ok || presetName.isEmpty())
  {
    //qWarning() << "doin nothin";
    return;
  }

  for (int i = 0; i < presetList.size(); ++i)
  {
    if (presetList.at(i).name == presetName)
    {
      presetList.removeAt(i);
      break;
    }
  }

  Preset preset;
  preset.name = presetName;
  preset.loginData = loginData;
  presetList.append(preset);

  savePresets();
}


void PresetManager::savePresets()
{
  createFile(); // recreate file

  // save all presets to file
  for (const Preset &preset : qAsConst(presetList))
  {
    QString presetString = QStringLiteral("%1:%2%3");

    QStringList presetValueList;

    presetValueList << preset.loginData.database;
    presetValueList << preset.loginData.username;
    presetValueList << preset.loginData.password;
    presetValueList << preset.loginData.hostname;
    presetValueList << preset.loginData.driver;

    if (preset.loginData.port > -1)
      presetValueList << QString::number(preset.loginData.port);

    if (!preset.loginData.filename.isEmpty())
      presetValueList << preset.loginData.filename;

    presetString = presetString.arg(preset.name, presetValueList.join(QLatin1Char(',')), newLine);

    file.write(presetString.toUtf8());
  }

  file.flush();
}


void PresetManager::addDefaultPreset()
{
  Preset defaultPreset;

  //defaultPreset.loginData.database = Settings::databaseName();
  defaultPreset.loginData.driver = QStringLiteral("PQSQL");
  defaultPreset.name = defaultPreset.loginData.database;
  defaultPreset.loginData.username = QStringLiteral("ctc_ws");
  defaultPreset.loginData.password = QStringLiteral("ctc11de");
  //defaultPreset.loginData.hostname = Settings::databaseHostname();
  defaultPreset.loginData.port     = -1;
  // no need to set filename

  presetList.insert(0, defaultPreset); // first item!
}


void PresetManager::createFile()
{
  file.resize(0); // clear file
  file.flush();

  file.write("#<PresetName>:<database><,username><,password><,hostname><,port(optional)><,filename(optional)>");
  file.write(newLine.toUtf8());
  file.flush();
}