/*=============================================================================
  
  Library: CTK
  
  Copyright (c) German Cancer Research Center,
    Division of Medical and Biological Informatics
    
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
    http://www.apache.org/licenses/LICENSE-2.0
    
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  
=============================================================================*/


#include <ctkCmdLineModuleXmlProgressWatcher.h>

#include "ctkCmdLineModuleSignalTester.h"

#include <QCoreApplication>
#include <QBuffer>
#include <QDataStream>
#include <QDebug>

#include <cstdlib>

namespace {

// Custom signal tester
class SignalTester : public ctkCmdLineModuleSignalTester
{
public:

  SignalTester() : accumulatedProgress(0)
  {}

  void filterStarted(const QString& name, const QString& comment)
  {
    ctkCmdLineModuleSignalTester::filterStarted(name, comment);
    if (name != "My Filter")
    {
      error = "Filter name does not match \"My Filter\" (got \"" + name + "\")";
      return;
    }
    if (comment != "Awesome filter")
    {
      error = "Filter comment does not match \"Awesome filter\" (got \"" + comment + "\")";
      return;
    }
  }

  void filterProgress(float progress)
  {
    ctkCmdLineModuleSignalTester::filterProgress(progress);
    accumulatedProgress += progress;
  }

  void filterFinished(const QString& name)
  {
    ctkCmdLineModuleSignalTester::filterFinished(name);
    if (name != "My Filter")
    {
      error = "Filter name does not match \"My Filter\" (got \"" + name + "\")";
      return;
    }
  }

  void filterXmlError(const QString& error)
  {
    ctkCmdLineModuleSignalTester::filterXmlError(error);
    this->error = error;
  }

  QString error;
  float accumulatedProgress;
};

bool xmlProgressWatcherTestSignalsAndValues()
{
  // Test data
  QByteArray filterStart = "<filter-start>\n"
                             "<filter-name>My Filter</filter-name>\n"
                             "<filter-comment>Awesome filter</filter-comment>\n"
                           "</filter-start>\n";
  QString filterProgress = "<filter-progress>%1</filter-progress>\n";
  QByteArray filterEnd = "<filter-end>\n"
                           "<filter-name>My Filter</filter-name>\n"
                           "<filter-time>23</filter-time>\n"
                         "</filter-end>";

  QBuffer buffer;
  buffer.open(QIODevice::ReadWrite);
  ctkCmdLineModuleXmlProgressWatcher progressWatcher(&buffer);

  SignalTester signalTester;
  signalTester.connect(&progressWatcher, SIGNAL(filterStarted(QString,QString)), &signalTester, SLOT(filterStarted(QString,QString)));
  signalTester.connect(&progressWatcher, SIGNAL(filterProgress(float)), &signalTester, SLOT(filterProgress(float)));
  signalTester.connect(&progressWatcher, SIGNAL(filterFinished(QString)), &signalTester, SLOT(filterFinished(QString)));
  signalTester.connect(&progressWatcher, SIGNAL(filterXmlError(QString)), &signalTester, SLOT(filterXmlError(QString)));

  buffer.write(filterStart);
  QCoreApplication::processEvents();
  buffer.write(filterProgress.arg(0.3).toLatin1());
  QCoreApplication::processEvents();
  buffer.write(filterProgress.arg(0.6).toLatin1());
  QCoreApplication::processEvents();
  buffer.write(filterProgress.arg(0.9).toLatin1());
  QCoreApplication::processEvents();
  buffer.write(filterEnd);
  QCoreApplication::processEvents();

  QList<QString> expectedSignals;
  expectedSignals << "filter.started";
  expectedSignals << "filter.progress";
  expectedSignals << "filter.progress";
  expectedSignals << "filter.progress";
  expectedSignals << "filter.finished";

  if (!signalTester.error.isEmpty())
  {
    qDebug() << signalTester.error;
    return false;
  }

  if (!signalTester.checkSignals(expectedSignals))
  {
    return false;
  }

  if (signalTester.accumulatedProgress != 1.8f)
  {
    qDebug() << "Progress information wrong. Expected 1.8, got" << signalTester.accumulatedProgress;
    return false;
  }

  return true;
}

bool xmlProgressWatcherTestMalformedXml()
{
  // Test data
  QByteArray filterOutput = "<filter-start>\n"
                              "<filter-name>My Filter</filter-name>\n"
                              "<filter-comment>Awesome filter</filter-comment>\n"
                              "chunk<some-tag>...</some-tag>\n"
                              "<filter-progress>0.2</filter-progress>\n"
                            "</filter-start>\n"
                            "<filter-progress>0.5</filter-progress>\n"
                            "<filter-end>\n"

                              "<filter-name>My Filter</filter-name>\n"
                              "<filter-time>23</filter-time>\n"
                            "</filter-end>";

  QBuffer buffer;
  buffer.open(QIODevice::ReadWrite);
  ctkCmdLineModuleXmlProgressWatcher progressWatcher(&buffer);

  SignalTester signalTester;
  signalTester.connect(&progressWatcher, SIGNAL(filterStarted(QString,QString)), &signalTester, SLOT(filterStarted(QString,QString)));
  signalTester.connect(&progressWatcher, SIGNAL(filterProgress(float)), &signalTester, SLOT(filterProgress(float)));
  signalTester.connect(&progressWatcher, SIGNAL(filterFinished(QString)), &signalTester, SLOT(filterFinished(QString)));
  signalTester.connect(&progressWatcher, SIGNAL(filterXmlError(QString)), &signalTester, SLOT(filterXmlError(QString)));

  buffer.write(filterOutput);
  QCoreApplication::processEvents();


  QList<QString> expectedSignals;
  expectedSignals << "filter.xmlError";
  expectedSignals << "filter.started";
  expectedSignals << "filter.progress";
  expectedSignals << "filter.finished";

  if (!signalTester.error.isEmpty())
  {
    qDebug() << signalTester.error;
    //return false;
  }

  if (!signalTester.checkSignals(expectedSignals))
  {
    return false;
  }

  if (signalTester.accumulatedProgress != 0.5f)
  {
    qDebug() << "Progress information wrong. Expected 1.8, got" << signalTester.accumulatedProgress;
    return false;
  }

  return true;
}

}

int ctkCmdLineModuleXmlProgressWatcherTest(int argc, char* argv[])
{
  QCoreApplication app(argc, argv);

  if (!xmlProgressWatcherTestSignalsAndValues())
  {
    return EXIT_FAILURE;
  }

  if (!xmlProgressWatcherTestMalformedXml())
  {
    return EXIT_FAILURE;
  }

  return EXIT_SUCCESS;
}