/* This file is part of MAUS: http://micewww.pp.rl.ac.uk/projects/maus
 *
 * MAUS is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * MAUS is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MAUS.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "gtest/gtest.h"

#include "src/common_cpp/JsonCppProcessors/ObjectProcessor.hh"

#include "src/common_cpp/JsonCppProcessors/PrimitivesProcessors.hh"

namespace MAUS {
// TestObject_1 and TestObject_2? Have been summarily executed...
class TestObject_4 {
  public:
    TestObject_4() : _reference(NULL) {}
    ~TestObject_4() {}

    double* GetReference() const {return _reference;}
    void SetReference(double* data) {
        _reference = data; // Note: don't own this memory
    }

  private:
    double* _reference;
};

class TestObject_3 {
  public:
    TestObject_3() : _pointer(NULL), _child_1(NULL), _child_2(NULL) {}
    ~TestObject_3() {
        if (_pointer != NULL) delete _pointer;
        if (_child_1 != NULL) delete _child_1;
        if (_child_2 != NULL) delete _child_2;
    }

    double* GetPointer() const {return _pointer;}
    void SetPointer(double* data) {
        if (_pointer != NULL) {
          delete _pointer;
        }
        _pointer = data;
    }

    TestObject_4* GetChild1() const {return _child_1;}
    void SetChild1(TestObject_4* data) {
        if (_child_1 != NULL) {
          delete _child_1;
        }
        _child_1 = data;
    }

    TestObject_4* GetChild2() const {return _child_2;}
    void SetChild2(TestObject_4* data) {
        if (_child_2 != NULL) {
          delete _child_2;
        }
        _child_2 = data;
    }

  private:
    double* _pointer;
    TestObject_4* _child_1;
    TestObject_4* _child_2;
};

TEST(ObjectProcessorReferenceTest, SimpleTreeTest) {
  ReferenceResolver::JsonToCpp::RefManager::Birth();
  ReferenceResolver::CppToJson::RefManager::Birth();
  // setup C++ tree
  TestObject_3 test_3;
  test_3.SetPointer(new double(1));
  test_3.SetChild1(new TestObject_4());
  test_3.GetChild1()->SetReference(test_3.GetPointer());
  test_3.SetChild2(new TestObject_4());
  test_3.GetChild2()->SetReference(test_3.GetPointer());

  // setup processors
  DoubleProcessor double_proc;
  ObjectProcessor<TestObject_4> test_4_proc;
  test_4_proc.RegisterPointerReference("reference",
                &TestObject_4::GetReference, &TestObject_4::SetReference, true);
  ObjectProcessor<TestObject_3> test_3_proc;
  test_3_proc.RegisterPointerBranch("child_1", &test_4_proc,
                &TestObject_3::GetChild1, &TestObject_3::SetChild1, true);
  test_3_proc.RegisterPointerBranch("child_2", &test_4_proc,
                &TestObject_3::GetChild2, &TestObject_3::SetChild2, true);
  test_3_proc.RegisterPointerBranch("pointer", &double_proc,
                &TestObject_3::GetPointer, &TestObject_3::SetPointer, true);

  // test C++ to Json conversion
  Json::Value* test_3_json = test_3_proc.CppToJson(test_3, "");
  ReferenceResolver::CppToJson::RefManager::
                                 GetInstance().ResolveReferences(*test_3_json);
  EXPECT_EQ((*test_3_json)["child_1"]["reference"]["$ref"],
            Json::Value("#pointer"));
  EXPECT_EQ((*test_3_json)["child_2"]["reference"]["$ref"],
            Json::Value("#pointer"));

  // check Json to C++ conversion
  TestObject_3* test_3_out = test_3_proc.JsonToCpp(*test_3_json);
  ReferenceResolver::JsonToCpp::RefManager::GetInstance().ResolveReferences();
  EXPECT_EQ(test_3_out->GetChild1()->GetReference(),
            test_3_out->GetPointer());
  EXPECT_EQ(test_3_out->GetChild2()->GetReference(),
            test_3_out->GetPointer());
  EXPECT_EQ(*(test_3_out->GetPointer()), *(test_3.GetPointer()));

  delete test_3_json;
  delete test_3_out;
  ReferenceResolver::CppToJson::RefManager::Death();
  ReferenceResolver::JsonToCpp::RefManager::Death();
}

TEST(ObjectProcessorReferenceTest, RequiredTest) {
  ObjectProcessor<TestObject_4> test_4_req_proc;
  test_4_req_proc.RegisterPointerReference("reference",
               &TestObject_4::GetReference, &TestObject_4::SetReference, true);
  ObjectProcessor<TestObject_4> test_4_not_proc;
  test_4_not_proc.RegisterPointerReference("reference",
               &TestObject_4::GetReference, &TestObject_4::SetReference, false);

  TestObject_4 test_4_cpp;
  test_4_cpp.SetReference(NULL);
  EXPECT_THROW(test_4_req_proc.CppToJson(test_4_cpp, ""), MAUS::Exceptions::Exception);
  delete test_4_not_proc.CppToJson(test_4_cpp, "");  // shouldnt throw

  Json::Value test_4_json(Json::objectValue);
  EXPECT_THROW(test_4_req_proc.JsonToCpp(test_4_json), MAUS::Exceptions::Exception);
  delete test_4_not_proc.JsonToCpp(test_4_json);  // shouldnt throw

  test_4_json["reference"] = Json::Value();
  EXPECT_THROW(test_4_req_proc.JsonToCpp(test_4_json), MAUS::Exceptions::Exception);
  delete test_4_not_proc.JsonToCpp(test_4_json);  // shouldnt throw

  test_4_json["reference"]["$ref"] = Json::Value();
  EXPECT_THROW(test_4_req_proc.JsonToCpp(test_4_json), MAUS::Exceptions::Exception);
  delete test_4_not_proc.JsonToCpp(test_4_json);  // shouldnt throw
}
}