/* Distributed under the Apache License, Version 2.0.
   See accompanying NOTICE file for details.*/

#include "engine/human_adult/whole_body/test/EngineTest.h"
#include "engine/human_adult/whole_body/Engine.h"
#include "engine/human_adult/whole_body/controller/Controller.h"
#include "engine/human_adult/whole_body/controller/CompartmentManager.h"
#include "engine/human_adult/whole_body/controller/SubstanceManager.h"
#include "engine/human_adult/whole_body/system/environment/EnvironmentModel.h"
#include "engine/human_adult/whole_body/system/physiology/Saturation.h"
#include "engine/human_adult/whole_body/system/physiology/EnergyModel.h"

#include "cdm/patient/SEPatient.h"
#include "cdm/circuit/SECircuit.h"
#include "cdm/circuit/SECircuitNode.h"
#include "cdm/circuit/SECircuitPath.h"
#include "cdm/circuit/thermal/SEThermalCircuit.h"
#include "cdm/circuit/thermal/SEThermalCircuitCalculator.h"
#include "cdm/substance/SESubstance.h"
#include "cdm/substance/SESubstanceFraction.h"
#include "cdm/system/physiology/SERespiratorySystem.h"
#include "cdm/system/environment/SEEnvironment.h"
#include "cdm/system/environment/SEEnvironmentalConditions.h"
#include "cdm/properties/SEScalarFrequency.h"
#include "cdm/properties/SEScalarArea.h"
#include "cdm/properties/SEScalarLengthPerTime.h"
#include "cdm/properties/SEScalarTemperature.h"
#include "cdm/properties/SEScalarVolumePerTime.h"
#include "cdm/properties/SEScalarMassPerVolume.h"
#include "cdm/properties/SEScalarHeatCapacitancePerMass.h"
#include "cdm/properties/SEScalarHeatResistance.h"
#include "cdm/properties/SEScalarHeatResistanceArea.h"
#include "cdm/properties/SEScalarPower.h"
#include "cdm/properties/SEScalarEnergy.h"
#include "cdm/properties/SEScalarMassPerTime.h"
#include "cdm/properties/SEScalar0To1.h"
#include "cdm/utils/DataTrack.h"

namespace pulse { namespace human_adult_whole_body
{
  //This test holds EnvironmentSkin and EnvironmentCore sources constant and varies BMR
  void EngineTest::InternalTemperatureVariableBMRCircuitTest(const std::string& sTestDirectory)
  {
    Engine pe;
    Controller& pc = (Controller&)pe.GetController();
    pc.GetLogger()->SetLogFile(sTestDirectory + "/InternalTemperatureVariableBMRCircuitTest.log");
    SEPatient patient(pc.GetLogger());
    patient.SerializeFromFile("./patients/StandardMale.json");
    pc.SetupPatient(patient);
    pc.GetSubstances().LoadSubstanceDirectory("./");
    pc.GetSaturationCalculator().Setup();
    pc.m_Config->Initialize("./", &pc.GetSubstances());
    pc.m_Config->EnableRenal(eSwitch::Off);
    pc.m_Config->EnableTissue(eSwitch::Off);
    pc.CreateCircuitsAndCompartments();

    SEThermalCircuit& m_TCircuit = pc.GetCircuits().GetInternalTemperatureCircuit();

    double testBMR_W = 100;
    SEThermalCircuitPath* GroundToCore = m_TCircuit.GetPath(pulse::InternalTemperaturePath::GroundToInternalCore);
    GroundToCore->GetHeatSourceBaseline().SetValue(testBMR_W, PowerUnit::W);
    SEThermalCircuitNode* Core = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalCore);
    Core->GetTemperature().SetValue(36.85, TemperatureUnit::C);
    Core->GetNextTemperature().SetValue(36.85, TemperatureUnit::C);
    SEThermalCircuitNode* Skin = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalSkin);
    Skin->GetTemperature().SetValue(33.0, TemperatureUnit::C);
    Skin->GetNextTemperature().SetValue(33.0, TemperatureUnit::C);
    SEThermalCircuitNode* Ground = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalGround);

    //Temporary heat source set until environment exists
    SEThermalCircuitPath& CoreToEnvironment = m_TCircuit.CreatePath(*Core, *Ground, "EnvironmentCore");
    CoreToEnvironment.GetHeatSourceBaseline().SetValue(0.3 * testBMR_W, PowerUnit::W);

    SEThermalCircuitPath& SkinToEnvironment = m_TCircuit.CreatePath(*Skin, *Ground, "EnvironmentSkin");
    SkinToEnvironment.GetHeatSourceBaseline().SetValue(0.7 * testBMR_W, PowerUnit::W);

    m_TCircuit.SetNextAndCurrentFromBaselines();
    m_TCircuit.StateChange();

    DataTrack outTrk;
    std::ofstream file;
    SEThermalCircuitCalculator calc(DefaultThermalCircuitCalculatorUnits, pc.GetLogger());

    double deltaT_s = 1.0 / 90;
    double inv_deltaT_s = 1.0 / deltaT_s;
    double time_s = 0;

    //For each timestep, simulate, holding EnvironmentSkin and EnvironmentCore constant
    for (unsigned int i = 0; i < (inv_deltaT_s * 900); i++)
    {
      ////Drive the circuit (step function)
      if (i == (inv_deltaT_s * 60))
      {
        //Increase BMR
        GroundToCore->GetHeatSourceBaseline().SetValue((5.0 * testBMR_W), PowerUnit::W);
      }
      else if (i == (inv_deltaT_s * 180))
      {
        //Set to 0
        GroundToCore->GetHeatSourceBaseline().SetValue(0, PowerUnit::W);
      }

      //Process - Execute the circuit
      calc.Process(m_TCircuit, deltaT_s);

      //Convert "next" values to current
      calc.PostProcess(m_TCircuit);

      //Record data
      outTrk.Track(time_s, m_TCircuit);
      if (i == 0)
      {
        outTrk.CreateFile(std::string(sTestDirectory + "/InternalTemperatureVariableBMRCircuitOutput.csv").c_str(), file);
      }
      outTrk.StreamTrackToFile(file);
      time_s += deltaT_s;
    }
    file.close();
  }

  //This test holds BMR and EnvironmentCore sources constant and varies EnvironmentSkin
  void EngineTest::InternalTemperatureVariableSkinCircuitTest(const std::string& sTestDirectory)
  {
    Engine pe;
    Controller& pc = (Controller&)pe.GetController();
    pc.GetLogger()->SetLogFile(sTestDirectory + "/InternalTemperatureVariableSkinCircuitTest.log");
    SEPatient patient(pc.GetLogger());
    patient.SerializeFromFile("./patients/StandardMale.json");
    pc.SetupPatient(patient);
    pc.GetSubstances().LoadSubstanceDirectory("./");
    pc.GetSaturationCalculator().Setup();
    pc.m_Config->Initialize("./", &pc.GetSubstances());
    pc.m_Config->EnableRenal(eSwitch::Off);
    pc.m_Config->EnableTissue(eSwitch::Off);
    pc.CreateCircuitsAndCompartments();

    SEThermalCircuit& m_TCircuit = pc.GetCircuits().GetInternalTemperatureCircuit();

    double testBMR = 1700;

    SEThermalCircuitPath* GroundToCore = m_TCircuit.GetPath(pulse::InternalTemperaturePath::GroundToInternalCore);
    GroundToCore->GetHeatSourceBaseline().SetValue(testBMR, PowerUnit::kcal_Per_day);
    SEThermalCircuitNode* Core = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalCore);
    Core->GetTemperature().SetValue(36.85, TemperatureUnit::C);
    Core->GetNextTemperature().SetValue(36.85, TemperatureUnit::C);
    SEThermalCircuitNode* Skin = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalSkin);
    Skin->GetTemperature().SetValue(33.0, TemperatureUnit::C);
    Skin->GetNextTemperature().SetValue(33.0, TemperatureUnit::C);
    SEThermalCircuitNode* Ground = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalGround);

    //Temporary heat source set until environment exists
    SEThermalCircuitPath& CoreToEnvironment = m_TCircuit.CreatePath(*Core, *Ground, "EnvironmentCore");
    CoreToEnvironment.GetHeatSourceBaseline().SetValue(0.3 * testBMR, PowerUnit::kcal_Per_day);

    SEThermalCircuitPath& SkinToEnvironment = m_TCircuit.CreatePath(*Skin, *Ground, "EnvironmentSkin");
    SkinToEnvironment.GetHeatSourceBaseline().SetValue(0.7 * testBMR, PowerUnit::kcal_Per_day);

    m_TCircuit.SetNextAndCurrentFromBaselines();
    m_TCircuit.StateChange();

    DataTrack outTrk;

    std::ofstream file;

    SEThermalCircuitCalculator calc(DefaultThermalCircuitCalculatorUnits, pc.GetLogger());

    double deltaT_s = 1.0 / 90;
    double inv_deltaT_s = 1.0 / deltaT_s;
    double time_s = 0;

    //For each timestep, simulate, holding BMR and EnvironmentCore constant
    for (unsigned int i = 0; i < (inv_deltaT_s * 120); i++)
    {
      //Drive the circuit (step function)
      if (i == (inv_deltaT_s * 10))
      {
        //Increase EnvironmentSkin (this means that the total of EnvSkin and EnvCore > BMR)
        SkinToEnvironment.GetHeatSourceBaseline().SetValue(0.9 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 20))
      {
        //Increase EnvironmentSkin again
        SkinToEnvironment.GetHeatSourceBaseline().SetValue(1.1 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 30))
      {
        //Decrease EnvironmentSkin to normal
        SkinToEnvironment.GetHeatSourceBaseline().SetValue(.7 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 40))
      {
        //Decrease EnvironmentSkin further
        SkinToEnvironment.GetHeatSourceBaseline().SetValue(.4 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 50))
      {
        //Decrease EnvironmentSkin further
        SkinToEnvironment.GetHeatSourceBaseline().SetValue(.2 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 60))
      {
        //Set to 0
        SkinToEnvironment.GetHeatSourceBaseline().SetValue(0, PowerUnit::kcal_Per_day);
      }

      //Process - Execute the circuit
      calc.Process(m_TCircuit, deltaT_s);

      //Convert "next" values to current
      calc.PostProcess(m_TCircuit);

      //Record data
      outTrk.Track(time_s, m_TCircuit);
      if (i == 0)
      {
        outTrk.CreateFile(std::string(sTestDirectory + "/InternalTemperatureVariableSkinCircuitOutput.csv").c_str(), file);
      }
      outTrk.StreamTrackToFile(file);
      time_s += deltaT_s;
    }
    file.close();
  }

  //This test holds BMR and EnvironmentSkin sources constant and varies EnvironmentCore
  void EngineTest::InternalTemperatureVariableCoreCircuitTest(const std::string& sTestDirectory)
  {
    Engine pe;
    Controller& pc = (Controller&)pe.GetController();
    pc.GetLogger()->SetLogFile(sTestDirectory + "/InternalTemperatureVariableCoreCircuitTest.log");
    SEPatient patient(pc.GetLogger());
    patient.SerializeFromFile("./patients/StandardMale.json");
    pc.SetupPatient(patient);
    pc.GetSubstances().LoadSubstanceDirectory("./");
    pc.GetSaturationCalculator().Setup();
    pc.m_Config->Initialize("./", &pc.GetSubstances());
    pc.m_Config->EnableRenal(eSwitch::Off);
    pc.m_Config->EnableTissue(eSwitch::Off);
    pc.CreateCircuitsAndCompartments();

    SEThermalCircuit& m_TCircuit = pc.GetCircuits().GetInternalTemperatureCircuit();

    double testBMR = 1700;

    SEThermalCircuitPath* GroundToCore = m_TCircuit.GetPath(pulse::InternalTemperaturePath::GroundToInternalCore);
    GroundToCore->GetHeatSourceBaseline().SetValue(testBMR, PowerUnit::kcal_Per_day);
    SEThermalCircuitNode* Core = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalCore);
    Core->GetTemperature().SetValue(36.85, TemperatureUnit::C);
    Core->GetNextTemperature().SetValue(36.85, TemperatureUnit::C);
    SEThermalCircuitNode* Skin = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalSkin);
    Skin->GetTemperature().SetValue(33.0, TemperatureUnit::C);
    Skin->GetNextTemperature().SetValue(33.0, TemperatureUnit::C);
    SEThermalCircuitNode* Ground = m_TCircuit.GetNode(pulse::InternalTemperatureNode::InternalGround);

    SEThermalCircuitPath& CoreToEnvironment = m_TCircuit.CreatePath(*Core, *Ground, "EnvironmentCore");
    CoreToEnvironment.GetHeatSourceBaseline().SetValue(0.3 * testBMR, PowerUnit::kcal_Per_day);

    SEThermalCircuitPath& SkinToEnvironment = m_TCircuit.CreatePath(*Skin, *Ground, "EnvironmentSkin");
    SkinToEnvironment.GetHeatSourceBaseline().SetValue(0.7 * testBMR, PowerUnit::kcal_Per_day);

    m_TCircuit.SetNextAndCurrentFromBaselines();
    m_TCircuit.StateChange();

    DataTrack outTrk;

    std::ofstream file;

    SEThermalCircuitCalculator calc(DefaultThermalCircuitCalculatorUnits, pc.GetLogger());

    double deltaT_s = 1.0 / 90;
    double inv_deltaT_s = 1.0 / deltaT_s;
    double time_s = 0;

    //For each timestep, simulate, holding BMR and EnvironmentCore constant
    for (unsigned int i = 0; i < (inv_deltaT_s * 120); i++)
    {
      //Drive the circuit (step function)
      if (i == (inv_deltaT_s * 10))
      {
        //Increase EnvironmentCore (this means that the total of EnvSkin and EnvCore > BMR)
        CoreToEnvironment.GetHeatSourceBaseline().SetValue(0.5 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 20))
      {
        //Increase EnvironmentCore again
        CoreToEnvironment.GetHeatSourceBaseline().SetValue(.7 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 30))
      {
        //Decrease EnvironmentCore to normal
        CoreToEnvironment.GetHeatSourceBaseline().SetValue(.3 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 40))
      {
        //Decrease EnvironmentCore further
        CoreToEnvironment.GetHeatSourceBaseline().SetValue(.2 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 50))
      {
        //Decrease EnvironmentCore further
        CoreToEnvironment.GetHeatSourceBaseline().SetValue(.1 * testBMR, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 60))
      {
        //Set to 0
        CoreToEnvironment.GetHeatSourceBaseline().SetValue(0, PowerUnit::kcal_Per_day);
      }

      //Process - Execute the circuit
      calc.Process(m_TCircuit, deltaT_s);

      //Convert "next" values to current
      calc.PostProcess(m_TCircuit);

      //Record data
      outTrk.Track(time_s, m_TCircuit);
      if (i == 0)
      {
        outTrk.CreateFile(std::string(sTestDirectory + "/InternalTemperatureVariableCoreCircuitOutput.csv").c_str(), file);
      }
      outTrk.StreamTrackToFile(file);
      time_s += deltaT_s;
    }
    file.close();
  }

  //This test uses a constant BMR in place of the Energy circuit and varies ambient temperature
  void EngineTest::EnvironmentVariableTemperatureCircuitTest(const std::string& sTestDirectory)
  {
    Engine pe;
    Controller& pc = (Controller&)pe.GetController();
    pc.GetLogger()->SetLogFile(sTestDirectory + "/EnvironmentVariableTemperatureCircuitTest.log");
    SEPatient patient(pc.GetLogger());
    patient.SerializeFromFile("./patients/StandardMale.json");
    pc.SetupPatient(patient);
    pc.GetSubstances().LoadSubstanceDirectory("./");
    pc.GetSaturationCalculator().Setup();
    pc.m_Config->Initialize("./", &pc.GetSubstances());
    pc.m_Config->EnableRenal(eSwitch::Off);
    pc.m_Config->EnableTissue(eSwitch::Off);
    pc.CreateCircuitsAndCompartments();

    //Grab the circuit
    SEThermalCircuit& m_ECircuit = pc.GetCircuits().GetExternalTemperatureCircuit();

    double testBMR = 1700;

    SEThermalCircuitPath* SkinToClothing = m_ECircuit.GetPath(pulse::ExternalTemperaturePath::ExternalSkinToClothing);
    SEThermalCircuitPath* ClothingToEnclosure = m_ECircuit.GetPath(pulse::ExternalTemperaturePath::ClothingToEnclosure);
    SEThermalCircuitPath* GroundToEnvironment = m_ECircuit.GetPath(pulse::ExternalTemperaturePath::GroundToEnvironment);
    SEThermalCircuitPath* ClothingToEnvironment = m_ECircuit.GetPath(pulse::ExternalTemperaturePath::ClothingToEnvironment);
    SEThermalCircuitPath* GroundToEnclosure = m_ECircuit.GetPath(pulse::ExternalTemperaturePath::GroundToEnclosure);

    //You must initialize these resistors or the circuit won't solve
    //These values were pulled from EnvironmentInput.csv from an older unit test
    //SkinToClothing->GetResistanceBaseline().SetValue(22.836, HeatResistanceUnit::K_Per_W);  //R Clothing
    SkinToClothing->GetResistanceBaseline().SetValue(.05, HeatResistanceUnit::K_Per_W);  //R Clothing
    ClothingToEnvironment->GetResistanceBaseline().SetValue(4.379, HeatResistanceUnit::K_Per_W); //R Convection
    ClothingToEnclosure->GetResistanceBaseline().SetValue(0.039, HeatResistanceUnit::K_Per_W); //R Radiation

    // Make a new source attached to Environment circuit to take the place of the Energy circuit
    SEThermalCircuitNode* Core = m_ECircuit.GetNode(pulse::ExternalTemperatureNode::ExternalCore);
    SEThermalCircuitNode* Skin = m_ECircuit.GetNode(pulse::ExternalTemperatureNode::ExternalSkin);
    SEThermalCircuitNode* Ground = m_ECircuit.GetNode(pulse::ExternalTemperatureNode::ExternalGround);

    SEThermalCircuitNode& MetabolicNode = m_ECircuit.CreateNode("Metabolic");
    SEThermalCircuitPath& MetabolicPath = m_ECircuit.CreatePath(*Ground, MetabolicNode, "GroundToMetabolic");
    m_ECircuit.CreatePath(*Core, MetabolicNode, "CoreToMetabolic");
    m_ECircuit.CreatePath(*Skin, MetabolicNode, "SkinToMetabolic");

    //Hold BMR constant
    MetabolicPath.GetHeatSourceBaseline().SetValue(testBMR, PowerUnit::kcal_Per_day);
    MetabolicPath.GetNextHeatSource().SetValue(testBMR, PowerUnit::kcal_Per_day);

    //Set some initial temperatures
    Core->GetTemperature().SetValue(37.0, TemperatureUnit::C);
    Skin->GetTemperature().SetValue(33.0, TemperatureUnit::C);
    SEThermalCircuitNode* Clothing = m_ECircuit.GetNode(pulse::ExternalTemperatureNode::Clothing);
    Clothing->GetTemperature().SetValue(30.0, TemperatureUnit::C);
    SEThermalCircuitNode* Environment = m_ECircuit.GetNode(pulse::ExternalTemperatureNode::Ambient);
    Environment->GetTemperature().SetValue(22.0, TemperatureUnit::C);
    MetabolicNode.GetTemperature().SetValue(22.0, TemperatureUnit::C);

    m_ECircuit.SetNextAndCurrentFromBaselines();
    m_ECircuit.StateChange();

    DataTrack outTrk;

    std::ofstream file;

    SEThermalCircuitCalculator calc(DefaultThermalCircuitCalculatorUnits, pc.GetLogger());

    double deltaT_s = 1.0 / 90;
    double inv_deltaT_s = 1.0 / deltaT_s;
    double time_s = 0;

    //For each timestep, simulate, holding everything constant but change ambient temp
    for (unsigned int i = 0; i < (inv_deltaT_s * 120); i++)
    {
      //Drive the circuit (step function)
      if (i == (0))
      {
        //Initialization above doesn't seem to work for ambient temp, so set it here
        GroundToEnvironment->GetNextTemperatureSource().SetValue(22.0, TemperatureUnit::C);
        GroundToEnclosure->GetNextTemperatureSource().SetValue(22.0, TemperatureUnit::C);
        Clothing->GetNextTemperature().SetValue(22.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 10))
      {
        //Make it cold
        GroundToEnvironment->GetNextTemperatureSource().SetValue(10.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 20))
      {
        //Make it freezing
        //NOTE: At the time of creating this test, using a value of 0.0 C incorrectly sets to 0.0 K, so use 0.1
        GroundToEnvironment->GetNextTemperatureSource().SetValue(0.1, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 30))
      {
        //Increase to body temp
        GroundToEnvironment->GetNextTemperatureSource().SetValue(37.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 40))
      {
        GroundToEnvironment->GetNextTemperatureSource().SetValue(45.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 50))
      {
        //Make it as hot as you can expect
        GroundToEnvironment->GetNextTemperatureSource().SetValue(55.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 60))
      {
        //Back to freezing
        GroundToEnvironment->GetNextTemperatureSource().SetValue(0.1, TemperatureUnit::C);
      }

      //Process - Execute the circuit
      calc.Process(m_ECircuit, deltaT_s);

      //Convert "next" values to current
      calc.PostProcess(m_ECircuit);

      //Record data
      outTrk.Track(time_s, m_ECircuit);
      if (i == 0)
      {
        outTrk.CreateFile(std::string(sTestDirectory + "/EnvironmentVariableTemperatureCircuitOutput.csv").c_str(), file);
      }
      outTrk.StreamTrackToFile(file);
      time_s += deltaT_s;
    }
    file.close();
  }

  //This test uses both the Environment and Energy circuits, varying both BMR and ambient temp
  void EngineTest::CombinedInternalAndEnvironmentVariableBMRandTemperatureCircuitTest(const std::string& sTestDirectory)
  {
    Engine pe;
    Controller& pc = (Controller&)pe.GetController();
    pc.GetLogger()->SetLogFile(sTestDirectory + "/CombinedInternalAndEnvironmentVariableBMRandTemperatureCircuitTest.log");
    SEPatient patient(pc.GetLogger());
    patient.SerializeFromFile("./patients/StandardMale.json");
    pc.SetupPatient(patient);
    pc.GetSubstances().LoadSubstanceDirectory("./");
    pc.GetSaturationCalculator().Setup();
    pc.m_Config->Initialize("./", &pc.GetSubstances());
    pc.m_Config->EnableRenal(eSwitch::Off);
    pc.m_Config->EnableTissue(eSwitch::Off);
    pc.CreateCircuitsAndCompartments();

    SEThermalCircuit& m_TECircuit = pc.GetCircuits().GetTemperatureCircuit();

    SEThermalCircuitPath* MetabolicPath = m_TECircuit.GetPath(pulse::InternalTemperaturePath::GroundToInternalCore);
    SEThermalCircuitPath* CoreToSkin = m_TECircuit.GetPath(pulse::InternalTemperaturePath::InternalCoreToInternalSkin);
    m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ExternalCoreToGround);
    m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ExternalSkinToGround);
    SEThermalCircuitPath* EnvSkinToClothing = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ExternalSkinToClothing);
    SEThermalCircuitPath* ClothingToEnclosure = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ClothingToEnclosure);
    SEThermalCircuitPath* GroundToEnvironment = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::GroundToEnvironment);
    m_TECircuit.GetPath(pulse::ExternalTemperaturePath::GroundToEnclosure);
    SEThermalCircuitPath* ClothingToEnvironment = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ClothingToEnvironment);

    //You must initialize these resistors or the circuit won't solve
    //These values were pulled from EnvironmentInput.csv from an older unit test
    double skinBloodFlow_m3Persec = 4.97E-06;
    double bloodDensity_kgPerm3 = 1050;
    double bloodSpecificHeat_JPerkgK = 3617;
    double alphaScale = 0.79; //tuning parameter for scaling resistance
    double CoreToSkinResistance_KPerW;
    CoreToSkinResistance_KPerW = 1.0 / (alphaScale * bloodDensity_kgPerm3 * bloodSpecificHeat_JPerkgK * skinBloodFlow_m3Persec);

    EnvSkinToClothing->GetResistanceBaseline().SetValue(22.836, HeatResistanceUnit::K_Per_W);  //R Clothing (this high value should prevent temp changes)
    ClothingToEnvironment->GetResistanceBaseline().SetValue(4.379, HeatResistanceUnit::K_Per_W); //R Convection
    ClothingToEnclosure->GetResistanceBaseline().SetValue(0.039, HeatResistanceUnit::K_Per_W); //R Radiation
    CoreToSkin->GetResistanceBaseline().SetValue(CoreToSkinResistance_KPerW, HeatResistanceUnit::K_Per_W); //R bloodflow heat transfer

    //Initialize BMR
    double testBMR = 1700;
    MetabolicPath->GetHeatSourceBaseline().SetValue(testBMR, PowerUnit::kcal_Per_day);
    MetabolicPath->GetNextHeatSource().SetValue(testBMR, PowerUnit::kcal_Per_day);

    //Set some initial temperatures
    SEThermalCircuitNode* Core = m_TECircuit.GetNode(pulse::InternalTemperatureNode::InternalCore);
    Core->GetTemperature().SetValue(37.0, TemperatureUnit::C);
    SEThermalCircuitNode* Skin = m_TECircuit.GetNode(pulse::InternalTemperatureNode::InternalSkin);
    Skin->GetTemperature().SetValue(33.0, TemperatureUnit::C);
    SEThermalCircuitNode* Clothing = m_TECircuit.GetNode(pulse::ExternalTemperatureNode::Clothing);
    Clothing->GetTemperature().SetValue(30.0, TemperatureUnit::C);
    SEThermalCircuitNode* Environment = m_TECircuit.GetNode(pulse::ExternalTemperatureNode::Ambient);
    Environment->GetTemperature().SetValue(22.0, TemperatureUnit::C);

    m_TECircuit.SetNextAndCurrentFromBaselines();
    m_TECircuit.StateChange();

    DataTrack outTrk;
    std::ofstream file;
    SEThermalCircuitCalculator calc(DefaultThermalCircuitCalculatorUnits, pc.GetLogger());

    double deltaT_s = 1.0 / 90;
    double inv_deltaT_s = 1.0 / deltaT_s;
    double time_s = 0;

    //For each timestep, simulate
    //For the first 120 seconds, hold everything constant and vary BMR
    //For the next 120 seconds, hold BMR constant and vary ambient temp
    for (unsigned int i = 0; i < (inv_deltaT_s * 240); i++)
    {
      //Drive the circuit (step function)
      if (i == 0)
      {
        //Initialization above doesn't seem to work for ambient temp, so set it here
        GroundToEnvironment->GetNextTemperatureSource().SetValue(22.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 10))
      {
        //Increase BMR
        MetabolicPath->GetHeatSourceBaseline().SetValue((testBMR + .2 * testBMR), PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 20))
      {
        //Increase BMR again
        MetabolicPath->GetHeatSourceBaseline().SetValue((testBMR + .4 * testBMR), PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 30))
      {
        //Decrease BMR to normal
        MetabolicPath->GetHeatSourceBaseline().SetValue((testBMR), PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 40))
      {
        //Decrease BMR further
        MetabolicPath->GetHeatSourceBaseline().SetValue((testBMR - .2 * testBMR), PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 50))
      {
        //Decrease BMR further
        MetabolicPath->GetHeatSourceBaseline().SetValue((testBMR - .4 * testBMR), PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 60))
      {
        //Set to 0
        MetabolicPath->GetHeatSourceBaseline().SetValue(0, PowerUnit::kcal_Per_day);
      }
      else if (i == (inv_deltaT_s * 120))
      {
        //Set BMR to normal, change ambient temp
        MetabolicPath->GetHeatSourceBaseline().SetValue(testBMR, PowerUnit::kcal_Per_day);
        GroundToEnvironment->GetNextTemperatureSource().SetValue(10.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 130))
      {
        //Make it freezing
        //NOTE: At the time of creating this test, using a value of 0.0 C incorrectly sets to 0.0 K, so use 0.1
        GroundToEnvironment->GetNextTemperatureSource().SetValue(0.1, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 140))
      {
        //Increase to body temp
        GroundToEnvironment->GetNextTemperatureSource().SetValue(37.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 150))
      {
        //Hotter...
        GroundToEnvironment->GetNextTemperatureSource().SetValue(45.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 160))
      {
        //Make it as hot as you can expect naturally
        GroundToEnvironment->GetNextTemperatureSource().SetValue(55.0, TemperatureUnit::C);
      }
      else if (i == (inv_deltaT_s * 170))
      {
        //Back to freezing
        GroundToEnvironment->GetNextTemperatureSource().SetValue(0.1, TemperatureUnit::C);
      }

      //Process - Execute the circuit
      calc.Process(m_TECircuit, deltaT_s);

      //Convert "next" values to current
      calc.PostProcess(m_TECircuit);

      //Record data
      outTrk.Track(time_s, m_TECircuit);
      if (i == 0)
      {
        outTrk.CreateFile(std::string(sTestDirectory + "/CombinedInternalAndEnvironmentVariableBMRandTemperatureCircuitOutput.csv").c_str(), file);
      }
      outTrk.StreamTrackToFile(file);
      time_s += deltaT_s;
    }
    file.close();
  }

  //This test verifies that the Skin temperature drops when drastically lowering other values
  void EngineTest::CombinedInternalAndEnvironmentSkinTempDropCircuitTest(const std::string& sTestDirectory)
  {
    Engine pe;
    Controller& pc = (Controller&)pe.GetController();
    pc.GetLogger()->SetLogFile(sTestDirectory + "/CombinedInternalAndEnvironmentSkinTempDropCircuitTest.log");
    SEPatient patient(pc.GetLogger());
    patient.SerializeFromFile("./patients/StandardMale.json");
    pc.SetupPatient(patient);
    pc.GetSubstances().LoadSubstanceDirectory("./");
    pc.GetSaturationCalculator().Setup();
    pc.m_Config->Initialize("./", &pc.GetSubstances());
    pc.m_Config->EnableRenal(eSwitch::Off);
    pc.m_Config->EnableTissue(eSwitch::Off);
    pc.CreateCircuitsAndCompartments();

    SEThermalCircuit& m_TECircuit = pc.GetCircuits().GetTemperatureCircuit();

    SEThermalCircuitPath* MetabolicPath = m_TECircuit.GetPath(pulse::InternalTemperaturePath::GroundToInternalCore);
    SEThermalCircuitPath* CoreToSkin = m_TECircuit.GetPath(pulse::InternalTemperaturePath::InternalCoreToInternalSkin);
    m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ExternalCoreToGround);
    m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ExternalSkinToGround);
    SEThermalCircuitPath* EnvSkinToClothing = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ExternalSkinToClothing);
    SEThermalCircuitPath* ClothingToEnclosure = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ClothingToEnclosure);
    SEThermalCircuitPath* GroundToEnvironment = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::GroundToEnvironment);
    SEThermalCircuitPath* GroundToEnclosure = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::GroundToEnclosure);
    SEThermalCircuitPath* ClothingToEnvironment = m_TECircuit.GetPath(pulse::ExternalTemperaturePath::ClothingToEnvironment);

    SEThermalCircuitNode* Clothing = m_TECircuit.GetNode(pulse::ExternalTemperatureNode::Clothing);

    //You must initialize these resistors or the circuit won't solve
    //These values were pulled from EnvironmentInput.csv from an older unit test
    double skinBloodFlow_m3Persec = 4.97E-06;
    double bloodDensity_kgPerm3 = 1050;
    double bloodSpecificHeat_JPerkgK = 3617;
    double alphaScale = 0.79; //tuning parameter for scaling resistance
    double CoreToSkinResistance_KPerW;
    CoreToSkinResistance_KPerW = 1.0 / (alphaScale * bloodDensity_kgPerm3 * bloodSpecificHeat_JPerkgK * skinBloodFlow_m3Persec);

    //EnvironmentSkinToClothing->GetHeatResistanceBaseline()->SetValue(22.836, HeatResistanceUnit::K_Per_W);  //R Clothing (this high resistance really slows cooling)
    EnvSkinToClothing->GetResistanceBaseline().SetValue(.05, HeatResistanceUnit::K_Per_W);  //R Clothing
    ClothingToEnvironment->GetResistanceBaseline().SetValue(4.379, HeatResistanceUnit::K_Per_W); //R Convection
    ClothingToEnclosure->GetResistanceBaseline().SetValue(0.039, HeatResistanceUnit::K_Per_W); //R Radiation
    CoreToSkin->GetResistanceBaseline().SetValue(CoreToSkinResistance_KPerW, HeatResistanceUnit::K_Per_W); //R bloodflow heat transfer

    //Initialize BMR
    double testBMR = 1700;
    MetabolicPath->GetHeatSourceBaseline().SetValue(testBMR, PowerUnit::kcal_Per_day);
    MetabolicPath->GetNextHeatSource().SetValue(testBMR, PowerUnit::kcal_Per_day);

    m_TECircuit.SetNextAndCurrentFromBaselines();
    m_TECircuit.StateChange();

    DataTrack outTrk;
    std::ofstream file;
    SEThermalCircuitCalculator calc(DefaultThermalCircuitCalculatorUnits, pc.GetLogger());

    double deltaT_s = 1.0 / 30;
    double inv_deltaT_s = 1.0 / deltaT_s;
    double time_s = 0;

    //For each timestep, simulate
    //Drop energy inputs after 10 seconds
    for (unsigned int i = 0; i < ((1 / deltaT_s) * 3600); i++)
    {
      //Drive the circuit (step function)
      if (i == 0)
      {
        //Initialization above doesn't seem to work for ambient temp, so set it here
        GroundToEnvironment->GetNextTemperatureSource().SetValue(22.0, TemperatureUnit::C);
        GroundToEnclosure->GetNextTemperatureSource().SetValue(22.0, TemperatureUnit::C);
        Clothing->GetNextTemperature().SetValue(22.0, TemperatureUnit::C);
      }
      //Now kill BMR and drop all temperatures
      else if (i == (inv_deltaT_s * 10))
      {
        MetabolicPath->GetHeatSourceBaseline().SetValue(0, PowerUnit::kcal_Per_day);
        GroundToEnvironment->GetNextTemperatureSource().SetValue(-40.0, TemperatureUnit::C);
        GroundToEnclosure->GetNextTemperatureSource().SetValue(-40.0, TemperatureUnit::C);
        Clothing->GetNextTemperature().SetValue(-40.0, TemperatureUnit::C);
      }

      //Process - Execute the circuit
      calc.Process(m_TECircuit, deltaT_s);

      //Convert "next" values to current
      calc.PostProcess(m_TECircuit);

      //Record data
      outTrk.Track(time_s, m_TECircuit);
      if (i == 0)
      {
        outTrk.CreateFile(std::string(sTestDirectory + "/CombinedInternalAndEnvironmentSkinTempDropCircuitOutput.csv").c_str(), file);
      }
      outTrk.StreamTrackToFile(file);
      time_s += deltaT_s;
    }
    file.close();
  }

  //This test compares Environment circuit output to ISO data
  void EngineTest::EnvironmentISO7730ComparisonTest(const std::string& sTestDirectory)
  {
    Engine pe;
    Controller& pc = (Controller&)pe.GetController();
    pc.GetLogger()->SetLogFile(sTestDirectory + "/EnvironmentTemperatureInput.log");
    SEPatient patient(pc.GetLogger());
    patient.SerializeFromFile("./patients/StandardMale.json");
    pc.SetupPatient(patient);
    pc.GetSubstances().LoadSubstanceDirectory("./");
    pc.GetSaturationCalculator().Setup();
    pc.m_Config->Initialize("./", &pc.GetSubstances());
    pc.m_Config->EnableRenal(eSwitch::Off);
    pc.m_Config->EnableTissue(eSwitch::Off);
    pc.CreateCircuitsAndCompartments();
    EnvironmentModel& env = (EnvironmentModel&)pc.GetEnvironment();
    env.Initialize();
    env.GetEnvironmentalConditions().SerializeFromFile("./environments/Standard.json", pc.GetSubstances());
    env.StateChange();

    pc.GetEnergy().GetCoreTemperature().SetValue(37.0, TemperatureUnit::C);
    pc.GetEnergy().GetSweatRate().SetValue(1.5e-5, MassPerTimeUnit::kg_Per_s);
    pc.GetRespiratory().GetRespirationRate().SetValue(16.0, FrequencyUnit::Per_min);
    pc.GetRespiratory().GetTotalPulmonaryVentilation().SetValue(16/*RespirationRate*/ * 0.5/*TidalVolume_L*/, VolumePerTimeUnit::L_Per_min);
    double dSkinSurfaceArea_M2 = pc.GetCurrentPatient().GetSkinSurfaceArea(AreaUnit::m2);

    //Inputs
    double dAirTemperature_C[13] = { 22, 27, 27, 23.5, 23.5, 19, 23.5, 23.5, 23, 23, 22, 27, 27 };
    double dMeanRadiantTemperature_C[13] = { 22, 27, 27, 25.5, 25.5, 19, 23.5, 23.5, 21, 21, 22, 27, 27 };
    double dRelativeAirVelocity_MPerS[13] = { 0.1, 0.1, 0.3, 0.1, 0.3, 0.1, 0.1, 0.3, 0.1, 0.3, 0.1, 0.1, 0.3 };
    double dRelativeHumidity[13] = { 60, 60, 60, 60, 60, 40, 40, 40, 40, 40, 60, 60, 60 };
    double dClothing_clo[13] = { 0.5, 0.5, 0.5, 0.5, 0.5, 1, 1, 1, 1, 1, 0.5, 0.5, 0.5 };
    double dMetabolicRate_met[13] = { 1.2, 1.2, 1.2, 1.2, 1.2, 1.2, 1.2, 1.2, 1.2, 1.2, 1.6, 1.6, 1.6 };

    //Outputs
    double dClothingSurfaceTemperature_C[13];
    double dConvectiveHeatLoss_WPerM2[13];
    double dRadiativeHeatLoss_WPerM2[13];
    double dRespirationHeatLoss_WPerM2[13];
    double dEvaporativeHeatLoss_WPerM2[13];

    double dAmbientTemperature_K = 295.4; //~72F

    SEThermalCircuit& EnvironmentCircuit = pc.GetCircuits().GetExternalTemperatureCircuit();
    SEThermalCircuitNode* ClothingNode = EnvironmentCircuit.GetNode(pulse::ExternalTemperatureNode::Clothing);
    SEThermalCircuitNode* EnvironmentCoreNode = EnvironmentCircuit.GetNode(pulse::ExternalTemperatureNode::ExternalCore);
    SEThermalCircuitNode* EnvironmentSkinNode = EnvironmentCircuit.GetNode(pulse::ExternalTemperatureNode::ExternalSkin);
    SEThermalCircuitNode* AbsoluteReferenceNode = EnvironmentCircuit.GetNode(pulse::ExternalTemperatureNode::ExternalGround);

    // Create some new stuff in the circuit
    SEThermalCircuitNode& MetabolicNode = EnvironmentCircuit.CreateNode("Metabolic");
    MetabolicNode.GetTemperature().SetValue(dAmbientTemperature_K, TemperatureUnit::K);
    SEThermalCircuitPath& MetabolicPath = EnvironmentCircuit.CreatePath(*AbsoluteReferenceNode, MetabolicNode, "AbsoluteReferenceToMetabolic");
    EnvironmentCircuit.CreatePath(MetabolicNode, *EnvironmentSkinNode, "MetabolicToEnvironmentSkin");
    EnvironmentCircuit.CreatePath(MetabolicNode, *EnvironmentCoreNode, "MetabolicToEnvironmentCore");

    //Initialize the new source so that circuit solves on first loop
    MetabolicPath.GetNextHeatSource().SetValue(0, PowerUnit::W);

    EnvironmentCircuit.SetNextAndCurrentFromBaselines();
    EnvironmentCircuit.StateChange();

    double deltaT = 1.0 / 90;
    SEThermalCircuitCalculator calc(DefaultThermalCircuitCalculatorUnits, pc.GetLogger());

    for (unsigned int i = 0; i < 13; i++)
    {
      env.GetEnvironmentalConditions().GetAmbientTemperature().SetValue(dAirTemperature_C[i], TemperatureUnit::C);
      env.GetEnvironmentalConditions().GetMeanRadiantTemperature().SetValue(dMeanRadiantTemperature_C[i], TemperatureUnit::C);
      env.GetEnvironmentalConditions().GetAirVelocity().SetValue(dRelativeAirVelocity_MPerS[i], LengthPerTimeUnit::m_Per_s);
      env.GetEnvironmentalConditions().GetRelativeHumidity().SetValue(dRelativeHumidity[i] / 100.0);
      env.GetEnvironmentalConditions().GetClothingResistance().SetValue(dClothing_clo[i], HeatResistanceAreaUnit::clo);
      env.StateChange();

      //Convert from mets and get rid of area
      double dMetabolicRate_W = dMetabolicRate_met[i] * 58.2 * dSkinSurfaceArea_M2;

      //Loop enough times to stabilize everything
      double dClothingTemperatureChange_K = 100.0;
      while (dClothingTemperatureChange_K > 1e-10)
      {
        MetabolicPath.GetNextHeatSource().SetValue(dMetabolicRate_W, PowerUnit::W);
        env.PreProcess();
        calc.Process(EnvironmentCircuit, deltaT);
        //Get the change in temperature on the clothing node from last time-step
        dClothingTemperatureChange_K = std::abs(ClothingNode->GetNextTemperature().GetValue(TemperatureUnit::K) - ClothingNode->GetTemperature().GetValue(TemperatureUnit::K));
        calc.PostProcess(EnvironmentCircuit);
      }

      dClothingSurfaceTemperature_C[i] = ClothingNode->GetTemperature().GetValue(TemperatureUnit::C);
      dConvectiveHeatLoss_WPerM2[i] = env.GetConvectiveHeatLoss(PowerUnit::W) / dSkinSurfaceArea_M2;
      dRadiativeHeatLoss_WPerM2[i] = env.GetRadiativeHeatLoss(PowerUnit::W) / dSkinSurfaceArea_M2;
      dRespirationHeatLoss_WPerM2[i] = env.GetRespirationHeatLoss(PowerUnit::W) / dSkinSurfaceArea_M2;
      dEvaporativeHeatLoss_WPerM2[i] = env.GetEvaporativeHeatLoss(PowerUnit::W) / dSkinSurfaceArea_M2;
    }

    //Write results to file
    DataTrack trk;
    for (unsigned int i = 0; i < 13; i++)
    {
      trk.Track("ClothingSurfaceTemperature(C)", i, dClothingSurfaceTemperature_C[i]);
      trk.Track("ConvectiveHeatLoss(W/m^2)", i, dConvectiveHeatLoss_WPerM2[i]);
      trk.Track("RadiativeHeatLoss(W/m^2)", i, dRadiativeHeatLoss_WPerM2[i]);
      trk.Track("RespirationHeatLoss(W/m^2)", i, dRespirationHeatLoss_WPerM2[i]);
      trk.Track("EvaporativeHeatLoss(W/m^2)", i, dEvaporativeHeatLoss_WPerM2[i]);
    }

    std::string sOutputFile = sTestDirectory + "/EnvironmentISO7730Comparison.csv";
    trk.WriteTrackToFile(sOutputFile.c_str());
  }
END_NAMESPACE_EX
