#include <qapplication.h>
#include <QtGui>
#include <QFile>
#include <iostream>
#include "salt.hh"

int main(int argc, char **argv)
{	
  QApplication a( argc, argv );

  if (argc == 2) {
    std::cerr  << " Call ./keygen <InfoFile> <Expiry date>" << std::endl;
    std::cerr << "Date is of the form: YYYY-MM-DD" << std::endl;
    exit(1);
  }

  QFile file(argv[1]);

  if (!file.open(QIODevice::ReadOnly|QIODevice::Text)) {
    std::cerr << "Unable to open file " << std::endl;
    return 1;
  }

  // Get license information
  QString name       = file.readLine().simplified();
  QString coreHash   = file.readLine().simplified();
  QString pluginHash = file.readLine().simplified();
  QString macHash    = file.readLine().simplified();

  file.close();

  std::cerr << "Generating key for Plugin : " << name.toStdString() << std::endl;
  std::cerr << "Core Hash   : " << coreHash.toStdString() << std::endl;
  std::cerr << "Plugin Hash : " << pluginHash.toStdString() << std::endl;
  std::cerr << "macHash is  : " << macHash.toStdString()  << std::endl;

  // Get the salts
  QString saltPre;
  ADD_SALT_PRE(saltPre);
  QString saltPost;
  ADD_SALT_POST(saltPost);

  // Generate basic key
  QString keyClear = coreHash + saltPre + pluginHash + saltPost + macHash;
  std::cerr << "keyClear is: " << keyClear.toStdString() << std::endl;

  QString keyHash = QCryptographicHash::hash ( keyClear.toAscii()  , QCryptographicHash::Sha1 ).toHex();
  std::cerr << "key is: " << keyHash.toStdString() << std::endl;

  // generate license
  QDate date = QDate::fromString(argv[2],Qt::ISODate);
  QString license = keyHash + " " + date.toString(Qt::ISODate); 

  std::cerr << "Writing License file to output : " << name.toStdString() << std::endl;
  QFile outFile(name + ".lic");
  
  if (!outFile.open(QIODevice::WriteOnly|QIODevice::Text)) {
    std::cerr << "Unable to open file " << std::endl;
    return 1;
  }

  QTextStream output(&outFile);
  
  output << license << " ";

  std::cerr << "License : " << license.toStdString() << std::endl;

  license = saltPre + license + saltPost;
  QString licenseHash = QCryptographicHash::hash ( license.toAscii()  , QCryptographicHash::Sha1 ).toHex();

  output << licenseHash;

  outFile.close();

  

  return 0;

}