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

#include "EngineTest.h"
#include "controller/Controller.h"
#include "controller/Substances.h"
#include "controller/Circuits.h"
#include "controller/Compartments.h"
#include "PulseConfiguration.h"

#include "patient/SEPatient.h"
#include "circuit/fluid/SEFluidCircuit.h"
#include "circuit/fluid/SEFluidCircuitCalculator.h"
#include "substance/SESubstanceFraction.h"
#include "compartment/SECompartmentManager.h"
#include "compartment/fluid/SEGasCompartmentGraph.h"
#include "compartment/fluid/SELiquidCompartmentGraph.h"
#include "compartment/substances/SEGasSubstanceQuantity.h"
#include "system/environment/SEEnvironment.h"
#include "system/environment/SEEnvironmentalConditions.h"
#include "properties/SEScalarPressure.h"
#include "properties/SEScalar0To1.h"
#include "properties/SEScalarMass.h"
#include "properties/SEScalarVolume.h"
#include "properties/SEScalarVolumePerTime.h"
#include "properties/SEScalarVolumePerPressure.h"
#include "properties/SEScalarTime.h"
#include "properties/SEScalarInverseVolume.h"
#include "properties/SEScalarMassPerVolume.h"
#include "utils/TimingProfile.h"
#include "utils/DataTrack.h"
#include <math.h>

void PulseEngineTest::RespiratoryCircuitAndTransportTest(RespiratoryConfiguration config, const std::string& sTestDirectory)
{
  TimingProfile tmr;
  tmr.Start("Test");
  //Output files
  DataTrack outTrkCircuit;
  DataTrack outTrkGraph;
  DataTrack aerosolGraphTrk;
  std::ofstream fileCircuit;
  std::ofstream fileGraph;
  std::ofstream fAerosolGraph;

  PulseController pc(sTestDirectory + "/RespiratoryCircuitAndTransportTest.log");
  SEPatient patient(pc.GetLogger());
  patient.SerializeFromFile("./patients/StandardMale.json", JSON);
  pc.SetupPatient(patient);
  pc.m_Config->EnableRenal(eSwitch::Off);
  pc.m_Config->EnableTissue(eSwitch::Off); 
  pc.CreateCircuitsAndCompartments();
  pc.GetSubstances().InitializeGasCompartments();
  SEEnvironmentalConditions& env = pc.GetEnvironment().GetEnvironmentalConditions();

  SEFluidCircuit* rCircuit = nullptr;
  SEGasCompartmentGraph* rGraph = nullptr;
  SELiquidCompartmentGraph* aGraph = nullptr;
  std::string sCircuitFileName;
  std::string sTransportFileName;
  std::string sAerosolTxptFileName;
  if (config == RespiratorySolo)
  {
    rCircuit = &pc.GetCircuits().GetRespiratoryCircuit();
    rGraph = &pc.GetCompartments().GetRespiratoryGraph();
    aGraph = nullptr;
    sCircuitFileName = "/RespiratoryCircuitOutput.csv";
    sTransportFileName = "/RespiratoryTransportOutput.csv";
    sAerosolTxptFileName = "";
  }
  else if (config == RespiratoryWithInhaler)
  {
    rCircuit = &pc.GetCircuits().GetRespiratoryAndInhalerCircuit();
    rGraph = &pc.GetCompartments().GetRespiratoryAndInhalerGraph();
    aGraph = &pc.GetCompartments().GetAerosolAndInhalerGraph();
    sCircuitFileName = "/RespiratoryAndInhalerCircuitOutput.csv";
    sTransportFileName = "/RespiratoryAndInhalerTransportOutput.csv";
    sAerosolTxptFileName = "/AerosolInhalerTransportOutput.csv";

    // Get an aerosolized substance
    SESubstance* albuterol = pc.GetSubstances().GetSubstance("Albuterol");
    if (albuterol == nullptr)
    {
      pc.Error("Could not find the aerosol substance : Albuterol");
    }
    else
    {
      pc.GetSubstances().AddActiveSubstance(*albuterol);
      SELiquidCompartment* mouthpiece = pc.GetCompartments().GetLiquidCompartment(pulse::InhalerCompartment::Mouthpiece);
      mouthpiece->GetSubstanceQuantity(*albuterol)->GetMass().SetValue(90, MassUnit::ug);
      mouthpiece->Balance(BalanceLiquidBy::Mass);
    }
  }
  else if (config == RespiratoryWithMechanicalVentilation)
  {
    rCircuit = &pc.GetCircuits().GetRespiratoryAndMechanicalVentilationCircuit();
    rGraph = &pc.GetCompartments().GetRespiratoryAndMechanicalVentilationGraph();
    aGraph = &pc.GetCompartments().GetAerosolAndMechanicalVentilationGraph();
    sCircuitFileName = "/RespiratoryAndMechanicalVentilationCircuitOutput.csv";
    sTransportFileName = "/RespiratoryAndMechanicalVentilationTransportOutput.csv";
    sAerosolTxptFileName = "/AerosolMechanicalVentilationTransportOutput.csv";

    // Get an aerosolized substance
    SESubstance* albuterol = pc.GetSubstances().GetSubstance("Albuterol");
    if (albuterol == nullptr)
    {
      pc.Error("Could not find the aerosol substance : Albuterol");
    }
    else
    {
      pc.GetSubstances().AddActiveSubstance(*albuterol);
      SELiquidCompartment* connection = pc.GetCompartments().GetLiquidCompartment(pulse::MechanicalVentilationCompartment::Connection);
      //It has a NaN volume, so this will keep the same volume fraction no matter what's going on around it
      connection->GetSubstanceQuantity(*albuterol)->GetConcentration().SetValue(10, MassPerVolumeUnit::ug_Per_L);
    }
  }
  else
  {
    return;
  }

  SEFluidCircuitPath *driverPath = rCircuit->GetPath(pulse::RespiratoryPath::EnvironmentToRespiratoryMuscle);
  SEGasTransporter    gtxpt(VolumePerTimeUnit::L_Per_s, VolumeUnit::L, VolumeUnit::L, pc.GetLogger());
  SELiquidTransporter ltxpt(VolumePerTimeUnit::mL_Per_s, VolumeUnit::mL, MassUnit::ug, MassPerVolumeUnit::ug_Per_mL, pc.GetLogger());
  SEFluidCircuitCalculator calc(VolumePerPressureUnit::L_Per_cmH2O, VolumePerTimeUnit::L_Per_s, PressureTimeSquaredPerVolumeUnit::cmH2O_s2_Per_L, PressureUnit::cmH2O, VolumeUnit::L, PressureTimePerVolumeUnit::cmH2O_s_Per_L, pc.GetLogger());
  
  //Set the reference not pressure to the standard environment
  //This is needed because we're not setting the Environment during initialization in this unit test
  rCircuit->GetNode(pulse::EnvironmentNode::Ambient)->GetNextPressure().Set(env.GetAtmosphericPressure());
  rCircuit->GetNode(pulse::EnvironmentNode::Ambient)->GetPressure().Set(env.GetAtmosphericPressure());
  //Precharge the stomach to prevent negative volume
  rCircuit->GetNode(pulse::RespiratoryNode::Stomach)->GetNextPressure().Set(env.GetAtmosphericPressure());
  rCircuit->GetNode(pulse::RespiratoryNode::Stomach)->GetPressure().Set(env.GetAtmosphericPressure());

  //Circuit Analysis Test --------------------------------------------------
  //Execution parameters
  double time = 0;
  double deltaT_s = 1.0 / 90.0;
  double runTime_min = 10.0;
  //Drive waveform parameters
  double period = 5.0;
  double alpha = (2 * M_PI) / (period);
  double driverPressure_cmH2O = 0.0;
  double amplitude_cmH2O = 6.0;
  double yOffset = -12.0;

  for (unsigned int i = 0; i < runTime_min * 60.0 / deltaT_s; i++)
  {
    //PreProcess - Push driver pressure and  variable compliance data into the Circuit
    driverPressure_cmH2O = yOffset + amplitude_cmH2O * sin(alpha * time);   //compute new pressure
    driverPath->GetNextPressureSource().SetValue(driverPressure_cmH2O, PressureUnit::cmH2O);

    //Process - Execute the circuit
    calc.Process(*rCircuit, deltaT_s);
    //Execute the substance transport function
    gtxpt.Transport(*rGraph, deltaT_s);
    // Do it again for aerosols
    if(aGraph!=nullptr)
      ltxpt.Transport(*aGraph, deltaT_s);
    //convert 'Next' values to current
    calc.PostProcess(*rCircuit);

    outTrkCircuit.Track(time, *rCircuit);
    outTrkGraph.Track(time, *rGraph);
    if(aGraph!=nullptr)
      aerosolGraphTrk.Track(time, *aGraph);
    time += deltaT_s;

    if (i == 0)
    {
      outTrkCircuit.CreateFile(std::string(sTestDirectory + sCircuitFileName).c_str(), fileCircuit);
      outTrkGraph.CreateFile(std::string(sTestDirectory + sTransportFileName).c_str(), fileGraph);
      if (aGraph != nullptr)
        aerosolGraphTrk.CreateFile(std::string(sTestDirectory + sAerosolTxptFileName).c_str(), fAerosolGraph);
    }
    outTrkCircuit.StreamTrackToFile(fileCircuit);
    outTrkGraph.StreamTrackToFile(fileGraph);
    if (aGraph != nullptr)
      aerosolGraphTrk.StreamTrackToFile(fAerosolGraph);
  }
  fileCircuit.close();
  fileGraph.close();
  fAerosolGraph.close();
  std::stringstream ss;
  ss << "It took " << tmr.GetElapsedTime_s("Test") << "s to run";
  pc.GetLogger()->Info(ss.str(), "RespiratoryCircuitAndTransportTest");
}

void PulseEngineTest::RespiratoryCircuitAndTransportTest(const std::string& sTestDirectory)
{
  RespiratoryCircuitAndTransportTest(RespiratorySolo, sTestDirectory);
}

void PulseEngineTest::RespiratoryWithInhalerCircuitAndTransportTest(const std::string& sTestDirectory)
{
  RespiratoryCircuitAndTransportTest(RespiratoryWithInhaler, sTestDirectory);
}

void PulseEngineTest::RespiratoryWithMechanicalVentilationCircuitAndTransportTest(const std::string& sTestDirectory)
{
  RespiratoryCircuitAndTransportTest(RespiratoryWithMechanicalVentilation, sTestDirectory);
}

void PulseEngineTest::RespiratoryDriverTest(const std::string& sTestDirectory)
{
  TimingProfile tmr;
  tmr.Start("Test");
  PulseController pc(sTestDirectory + "/RespiratoryDriverTest.log");
  SEPatient patient(pc.GetLogger());
  patient.SerializeFromFile("./patients/StandardMale.json", JSON);
  pc.SetupPatient(patient);
  pc.m_Config->EnableRenal(eSwitch::Off);
  pc.m_Config->EnableTissue(eSwitch::Off);
  pc.CreateCircuitsAndCompartments();
  SEEnvironmentalConditions env(pc.GetSubstances());
  env.SerializeFromFile("./environments/Standard.json",JSON);
  SEGasCompartment* cEnv = pc.GetCompartments().GetGasCompartment(pulse::EnvironmentCompartment::Ambient);
  for (SESubstanceFraction* subFrac : env.GetAmbientGases())
  {
    pc.GetSubstances().AddActiveSubstance(subFrac->GetSubstance());
    cEnv->GetSubstanceQuantity(subFrac->GetSubstance())->GetVolumeFraction().Set(subFrac->GetFractionAmount());
  }
  pc.GetSubstances().InitializeGasCompartments();

  DataTrack trk1;  
  SEFluidCircuit& RespCircuit = pc.GetCircuits().GetRespiratoryCircuit();
  SEFluidCircuitCalculator calc(VolumePerPressureUnit::L_Per_cmH2O, VolumePerTimeUnit::L_Per_s, PressureTimeSquaredPerVolumeUnit::cmH2O_s2_Per_L, PressureUnit::cmH2O, VolumeUnit::L, PressureTimePerVolumeUnit::cmH2O_s_Per_L, pc.GetLogger());

  double deltaT_s = 1.0 / 50.0;

  SEFluidCircuitPath* driverPressurePath = RespCircuit.GetPath(pulse::RespiratoryPath::EnvironmentToRespiratoryMuscle);
  SEFluidCircuitPath* rightPleuralToRespiratoryMuscle = RespCircuit.GetPath(pulse::RespiratoryPath::RightPleuralToRespiratoryMuscle);
  SEFluidCircuitPath* leftPleuralToRespiratoryMuscle = RespCircuit.GetPath(pulse::RespiratoryPath::LeftPleuralToRespiratoryMuscle);
  SEFluidCircuitPath* AirwayToCarina = RespCircuit.GetPath(pulse::RespiratoryPath::AirwayToCarina);
  SEFluidCircuitPath* RightAlveoliToRightPleuralConnection = RespCircuit.GetPath(pulse::RespiratoryPath::RightAlveoliToRightPleuralConnection);
  SEFluidCircuitPath* LeftAlveoliToLeftPleuralConnection = RespCircuit.GetPath(pulse::RespiratoryPath::LeftAlveoliToLeftPleuralConnection);
  
  SEFluidCircuitNode* rightPleuralNode = RespCircuit.GetNode(pulse::RespiratoryNode::RightPleural);
  SEFluidCircuitNode* leftPleuralNode = RespCircuit.GetNode(pulse::RespiratoryNode::LeftPleural);
  SEFluidCircuitNode* rightDeadSpaceNode = RespCircuit.GetNode(pulse::RespiratoryNode::RightAnatomicDeadSpace);
  SEFluidCircuitNode* leftDeadSpaceNode = RespCircuit.GetNode(pulse::RespiratoryNode::LeftAnatomicDeadSpace);
  SEFluidCircuitNode* rightAlveoliNode = RespCircuit.GetNode(pulse::RespiratoryNode::RightAlveoli);
  SEFluidCircuitNode* leftAlveoliNode = RespCircuit.GetNode(pulse::RespiratoryNode::LeftAlveoli);
  SEFluidCircuitNode* muscleNode = RespCircuit.GetNode(pulse::RespiratoryNode::RespiratoryMuscle);
  
  driverPressurePath->GetNextPressureSource().SetValue(0.0, PressureUnit::cmH2O);
  double PressureIncrement_cmH2O = 0.1;
  double DriverPressure_cmH2O = 0.0;
  bool bSettled = false;
  bool bIRVReached = false;
  bool bRVReached = false;
  int iTime = 0;
  double AmbientPresure_cmH2O = 1033.23; // = 1 atm
  double calculatedTotalCompliance_L_Per_cmH2O = 0.0;

  RespCircuit.GetNode(pulse::EnvironmentNode::Ambient)->GetNextPressure().SetValue(AmbientPresure_cmH2O, PressureUnit::cmH2O);

  while (!bIRVReached)
  {
    double TotalVolume_L = 0.0;
    double PreviousTotalVolume_L = 0.0;
    while (!bSettled)
    {
      //Set the driver pressure
      //Note: the driver pressure should be negative for inhaling
      driverPressurePath->GetNextPressureSource().SetValue(DriverPressure_cmH2O, PressureUnit::cmH2O);
      
      //Process the circuit
      calc.Process(RespCircuit, deltaT_s);
      //Advance time
      calc.PostProcess(RespCircuit);

      //Calculate the total lung volume
      TotalVolume_L =
        leftDeadSpaceNode->GetVolume(VolumeUnit::L) +
        leftAlveoliNode->GetVolume(VolumeUnit::L) +
        rightDeadSpaceNode->GetVolume(VolumeUnit::L) +
        rightAlveoliNode->GetVolume(VolumeUnit::L);

      //Check to see if the circuit has stabilized
      if (std::abs(TotalVolume_L - PreviousTotalVolume_L) < 1e-10)
      {
        bool polarityReversed = RightAlveoliToRightPleuralConnection->GetPolarizedState() == eGate::Open &&
          LeftAlveoliToLeftPleuralConnection->GetPolarizedState() == eGate::Open;
        if (!bRVReached && TotalVolume_L <= pc.GetCurrentPatient().GetResidualVolume(VolumeUnit::L) || polarityReversed)
        {
          bRVReached = true;
        }

        if (bRVReached)
        {
          //Output values
          double driverPressure = driverPressurePath->GetPressureSource(PressureUnit::cmH2O);

          trk1.Track("LungVolume_L", iTime, TotalVolume_L);
          trk1.Track("DriverPressure_cmH2O", iTime, driverPressure);

          double leftAlveoliPressure = leftAlveoliNode->GetPressure(PressureUnit::cmH2O);
          double leftAlveoliVolume = leftAlveoliNode->GetVolume(VolumeUnit::L);
          double leftPleuralPressure = leftPleuralNode->GetPressure(PressureUnit::cmH2O);
          double leftPleuralVolume = leftPleuralNode->GetVolume(VolumeUnit::L);
          double leftChestWallCompliance_L_Per_cmH2O = leftPleuralToRespiratoryMuscle->GetCompliance(VolumePerPressureUnit::L_Per_cmH2O);
          double leftLungCompliance_L_Per_cmH2O = leftPleuralToRespiratoryMuscle->GetCompliance(VolumePerPressureUnit::L_Per_cmH2O);

          double rightAlveoliPressure = rightAlveoliNode->GetPressure(PressureUnit::cmH2O);
          double rightAlveoliVolume = rightAlveoliNode->GetVolume(VolumeUnit::L);
          double rightPleuralPressure = rightPleuralNode->GetPressure(PressureUnit::cmH2O);
          double rightPleuralVolume = rightPleuralNode->GetVolume(VolumeUnit::L);
          double rightChestWallCompliance_L_Per_cmH2O = rightPleuralToRespiratoryMuscle->GetCompliance(VolumePerPressureUnit::L_Per_cmH2O);
          double rightLungCompliance_L_Per_cmH2O = rightPleuralToRespiratoryMuscle->GetCompliance(VolumePerPressureUnit::L_Per_cmH2O);

          double leftSideCompliance_L_Per_cmH2O = 1.0 / (1.0 / leftChestWallCompliance_L_Per_cmH2O + 1.0 / leftLungCompliance_L_Per_cmH2O);
          double rightSideCompliance_L_Per_cmH2O = 1.0 / (1.0 / rightChestWallCompliance_L_Per_cmH2O + 1.0 / rightLungCompliance_L_Per_cmH2O);

          double totalCompliance_L_Per_cmH2O = leftSideCompliance_L_Per_cmH2O + rightSideCompliance_L_Per_cmH2O;

          double approxZero = 1e-10;
          if (!(driverPressure < approxZero && driverPressure > -approxZero))
          {
            calculatedTotalCompliance_L_Per_cmH2O = -(TotalVolume_L - pc.GetCurrentPatient().GetFunctionalResidualCapacity(VolumeUnit::L)) / driverPressure;
          }           

          trk1.Track("ChestWallPressure_cmH2O", iTime, muscleNode->GetPressure(PressureUnit::cmH2O) - AmbientPresure_cmH2O);
          trk1.Track("RightAlveoliVolume_L", iTime, rightAlveoliVolume);
          trk1.Track("LeftAlveoliVolume_L", iTime, leftAlveoliVolume);
          trk1.Track("RightAlveoliPressure_cmH2O", iTime, rightAlveoliPressure - AmbientPresure_cmH2O);
          trk1.Track("LeftAlveoliPressure_cmH2O", iTime, leftAlveoliPressure - AmbientPresure_cmH2O);
          trk1.Track("RightPleuralVolume_L", iTime, rightPleuralVolume);
          trk1.Track("LeftPleuralVolume_L", iTime, leftPleuralVolume);
          trk1.Track("RightPleuralPressure_cmH2O", iTime, rightPleuralPressure - AmbientPresure_cmH2O);
          trk1.Track("LeftPleuralPressure_cmH2O", iTime, leftPleuralPressure - AmbientPresure_cmH2O);
          trk1.Track("RightTranspulmonaryPressure_cmH2O", iTime, rightAlveoliPressure - rightPleuralPressure);
          trk1.Track("LeftTranspulmonaryPressure_cmH2O", iTime, leftAlveoliPressure - leftPleuralPressure);

          trk1.Track("leftSideCompliance_L_Per_cmH2O", iTime, leftSideCompliance_L_Per_cmH2O);
          trk1.Track("rightSideCompliance_L_Per_cmH2O", iTime, rightSideCompliance_L_Per_cmH2O);
          trk1.Track("totalCompliance_L_Per_cmH2O", iTime, totalCompliance_L_Per_cmH2O);

          trk1.Track("calculatedTotalCompliance_L_Per_cmH2O", iTime, calculatedTotalCompliance_L_Per_cmH2O);

          iTime++;
        }
        bSettled = true;
      }
      PreviousTotalVolume_L = TotalVolume_L;
    }
    bSettled = false;

    //Check to see if we've gone all the way to the max volume
    if (TotalVolume_L >= pc.GetCurrentPatient().GetTotalLungCapacity(VolumeUnit::L))
    {
      bIRVReached = true;
    }
    else if (!bRVReached)
    {
      //Exhale more
      DriverPressure_cmH2O = DriverPressure_cmH2O + PressureIncrement_cmH2O;
    }
    else
    {
      //Inhale more
      DriverPressure_cmH2O = DriverPressure_cmH2O - PressureIncrement_cmH2O;
    }
  }
  trk1.WriteTrackToFile(std::string(sTestDirectory + "/RespiratoryDriverOutput.csv").c_str());
  std::stringstream ss;
  ss << "It took " << tmr.GetElapsedTime_s("Test") << "s to run";
  pc.GetLogger()->Info(ss.str(), "RespiratoryDriverTest");
}
