#ifndef ALGORITHMFACTORYTEST_H_
#define ALGORITHMFACTORYTEST_H_

#include <cxxtest/TestSuite.h>
#include "MantidAPI/AlgorithmFactory.h"
#include "MantidKernel/Instantiator.h"
#include "FakeAlgorithms.h"


class AlgorithmFactoryTest : public CxxTest::TestSuite
{
public:
  // This pair of boilerplate methods prevent the suite being created statically
  // This means the constructor isn't called when running other tests
  static AlgorithmFactoryTest *createSuite() { return new AlgorithmFactoryTest(); }
  static void destroySuite( AlgorithmFactoryTest *suite ) { delete suite; }

  AlgorithmFactoryTest()
  {}

  ~AlgorithmFactoryTest()
  {}

  void testSubscribe()
  {
    Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>* newTwo = new Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>;
    
    //get the number of algorithms it already has
    std::vector<std::string> keys = AlgorithmFactory::Instance().getKeys();
    size_t noOfAlgs = keys.size();

    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().subscribe<ToyAlgorithm>());
    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().subscribe(newTwo));

    TS_ASSERT_THROWS_ANYTHING(AlgorithmFactory::Instance().subscribe<ToyAlgorithm>());
   
    //get the number of algorithms it has now
    keys = AlgorithmFactory::Instance().getKeys();
    size_t noOfAlgsAfter = keys.size();
    TS_ASSERT_EQUALS(noOfAlgsAfter, noOfAlgs + 2);

    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",1);
    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",2);
  }

  void testUnsubscribe()
  {
    Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>* newTwo = new Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>;

    //get the nubmer of algorithms it already has
    std::vector<std::string> keys = AlgorithmFactory::Instance().getKeys();
    size_t noOfAlgs = keys.size();

    AlgorithmFactory::Instance().subscribe<ToyAlgorithm>();
    AlgorithmFactory::Instance().subscribe(newTwo);
   
    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",1));
    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",2));
    
    //get the nubmer of algorithms it has now
    keys = AlgorithmFactory::Instance().getKeys();
    size_t noOfAlgsAfter = keys.size();

    TS_ASSERT_EQUALS(noOfAlgsAfter, noOfAlgs)

    //try unsubscribing them again
    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",1));
    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",2));
    
    //make sure the number hasn't changed
    keys = AlgorithmFactory::Instance().getKeys();
    size_t noOfAlgsAgain = keys.size();

    TS_ASSERT_EQUALS(noOfAlgsAfter, noOfAlgsAgain);
  }
  
  void testExists()
  {
    Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>* newTwo = new Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>;
    
    AlgorithmFactory::Instance().subscribe<ToyAlgorithm>();
    AlgorithmFactory::Instance().subscribe(newTwo);
    
    TS_ASSERT(AlgorithmFactory::Instance().exists("ToyAlgorithm",1));
    TS_ASSERT(AlgorithmFactory::Instance().exists("ToyAlgorithm",2));
    TS_ASSERT(!AlgorithmFactory::Instance().exists("ToyAlgorithm",3));
    TS_ASSERT(!AlgorithmFactory::Instance().exists("ToyAlgorithm",4));
    TS_ASSERT(AlgorithmFactory::Instance().exists("ToyAlgorithm",-1));

    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",1);
    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",2);
  }
  
  void testGetKeys()
  {
    std::vector<std::string> keys;

    TS_ASSERT_EQUALS(0, keys.size());
    AlgorithmFactory::Instance().subscribe<ToyAlgorithm>();

    TS_ASSERT_THROWS_NOTHING(keys = AlgorithmFactory::Instance().getKeys());
    size_t noOfAlgs = keys.size();

    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",1);

    TS_ASSERT_THROWS_NOTHING(keys = AlgorithmFactory::Instance().getKeys());
    TS_ASSERT_EQUALS(noOfAlgs - 1, keys.size());
  }

  void test_HighestVersion()
  {
    auto & factory = AlgorithmFactory::Instance();

    TS_ASSERT_THROWS(factory.highestVersion("ToyAlgorithm"), std::invalid_argument);

    AlgorithmFactory::Instance().subscribe<ToyAlgorithm>();
    TS_ASSERT_EQUALS(1, factory.highestVersion("ToyAlgorithm"));

    Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>* newTwo = new Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>;
    AlgorithmFactory::Instance().subscribe(newTwo);
    TS_ASSERT_EQUALS(2, factory.highestVersion("ToyAlgorithm"));

    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",1);
    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",2);
  }
  
  void testCreate()
  {
    Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>* newTwo = new Mantid::Kernel::Instantiator<ToyAlgorithmTwo, Algorithm>;
    
    AlgorithmFactory::Instance().subscribe<ToyAlgorithm>();
    AlgorithmFactory::Instance().subscribe(newTwo);
    
    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().create("ToyAlgorithm",-1));
    TS_ASSERT_THROWS_ANYTHING(AlgorithmFactory::Instance().create("AlgorithmDoesntExist",-1));

    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().create("ToyAlgorithm",1));
    TS_ASSERT_THROWS_NOTHING(AlgorithmFactory::Instance().create("ToyAlgorithm",2));
    TS_ASSERT_THROWS_ANYTHING(AlgorithmFactory::Instance().create("AlgorithmDoesntExist",1));
    TS_ASSERT_THROWS_ANYTHING(AlgorithmFactory::Instance().create("AlgorithmDoesntExist",2));

    TS_ASSERT_THROWS_ANYTHING(AlgorithmFactory::Instance().create("",1));
    TS_ASSERT_THROWS_ANYTHING(AlgorithmFactory::Instance().create("",-1));

    TS_ASSERT_THROWS_ANYTHING(AlgorithmFactory::Instance().create("ToyAlgorithm",3));
    TS_ASSERT_THROWS_ANYTHING(AlgorithmFactory::Instance().create("ToyAlgorithm",4));

    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",1);
    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",2);
  }

  void testGetDescriptors()
  {
    AlgorithmFactory::Instance().subscribe<ToyAlgorithm>();
    std::vector<Algorithm_descriptor> descriptors;
    TS_ASSERT_THROWS_NOTHING(descriptors = AlgorithmFactory::Instance().getDescriptors(true));

    size_t noOfAlgs = descriptors.size();
    std::vector<Algorithm_descriptor>::const_iterator descItr = descriptors.begin();
    bool foundAlg = false;
    while (descItr != descriptors.end() && !foundAlg)
    {
      foundAlg = ("Cat" == descItr->category) &&
        ("ToyAlgorithm" == descItr->name) &&
        ("Dog" == descItr->alias) &&
        (1 == descItr->version);
      descItr++;
    }
    TS_ASSERT(foundAlg);

    AlgorithmFactory::Instance().unsubscribe("ToyAlgorithm",1);

    TS_ASSERT_THROWS_NOTHING(descriptors = AlgorithmFactory::Instance().getDescriptors(true));

    TS_ASSERT_EQUALS(noOfAlgs - 1, descriptors.size());
  }  

  void testGetCategories()
  {
    AlgorithmFactory::Instance().subscribe<CategoryAlgorithm>();
    std::set<std::string> validCategories;
    TS_ASSERT_THROWS_NOTHING(validCategories = AlgorithmFactory::Instance().getCategories(true));
    
    size_t noOfCats = validCategories.size();
    TS_ASSERT_DIFFERS(validCategories.find("Fake"), validCategories.end());

    AlgorithmFactory::Instance().unsubscribe("CategoryAlgorithm",1);
    TS_ASSERT_THROWS_NOTHING(validCategories = AlgorithmFactory::Instance().getCategories(true));
    TS_ASSERT_EQUALS(noOfCats - 1, validCategories.size());
  }
  
  void testGetCategoriesWithState()
  {
    AlgorithmFactory::Instance().subscribe<CategoryAlgorithm>();

    std::map<std::string, bool> validCategories;
    TS_ASSERT_THROWS_NOTHING(validCategories = AlgorithmFactory::Instance().getCategoriesWithState());
    size_t noOfCats = validCategories.size();
    TS_ASSERT_DIFFERS(validCategories.find("Fake"), validCategories.end());
    
    AlgorithmFactory::Instance().unsubscribe("CategoryAlgorithm",1);
    TS_ASSERT_THROWS_NOTHING(validCategories = AlgorithmFactory::Instance().getCategoriesWithState());
    TS_ASSERT_EQUALS(noOfCats - 1, validCategories.size());
  }
  
  void testDecodeName()
  {
    std::pair<std::string,int> basePair;
    basePair.first = "Cat";
    basePair.second = 1;
    std::string mangledName = "Cat|1";
    std::pair<std::string,int> outPair;
    TS_ASSERT_THROWS_NOTHING(outPair = AlgorithmFactory::Instance().decodeName(mangledName));
    TS_ASSERT_EQUALS(basePair.first,outPair.first);
    TS_ASSERT_EQUALS(basePair.second,outPair.second);

    mangledName = "Cat 1";
    TS_ASSERT_THROWS_ANYTHING(outPair = AlgorithmFactory::Instance().decodeName(mangledName));
  }


};

#endif