# *******************************************************************************
# OpenStudio(R), Copyright (c) Alliance for Sustainable Energy, LLC.
# See also https://openstudio.net/license
# *******************************************************************************

# start the measure
class SetGasBurnerEfficiency < OpenStudio::Measure::ModelMeasure
  # define the name that a user will see, this method may be deprecated as
  # the display name in PAT comes from the name field in measure.xml
  def name
    return 'Set Gas Burner Efficiency'
  end

  # define the arguments that the user will input
  def arguments(model)
    args = OpenStudio::Measure::OSArgumentVector.new

    # populate choice argument for constructions that are applied to surfaces in the model
    air_loop_handles = OpenStudio::StringVector.new
    air_loop_display_names = OpenStudio::StringVector.new

    # putting space types and names into hash
    air_loop_args = model.getAirLoopHVACs
    air_loop_args_hash = {}
    air_loop_args.each do |air_loop_arg|
      air_loop_args_hash[air_loop_arg.name.to_s] = air_loop_arg
    end

    # looping through sorted hash of air loops
    air_loop_args_hash.sort.map do |key, value|
      show_loop = false
      components = value.supplyComponents
      components.each do |component|
        if !component.to_CoilCoolingDXTwoSpeed.is_initialized # instead of if not component.to_CoilCoolingDXTwoSpeed.empty?
          show_loop = true
        end
      end
      if show_loop == true
        air_loop_handles << value.handle.to_s
        air_loop_display_names << key
      end
    end

    # add building to string vector with air loops
    building = model.getBuilding
    air_loop_handles << building.handle.to_s
    air_loop_display_names << '*All Air Loops*'

    # make an argument for air loops
    object = OpenStudio::Measure::OSArgument.makeChoiceArgument('object', air_loop_handles, air_loop_display_names, true)
    object.setDisplayName('Choose an Air Loop with a two speed DX Cooling Unit to Alter.')
    object.setDefaultValue('*All Air Loops*') # if no air loop is chosen this will run on all air loops
    args << object

    # make an argument to add new space true/false
    eff = OpenStudio::Measure::OSArgument.makeDoubleArgument('eff', true)
    eff.setDisplayName('Burner Efficiency (fractional)')
    eff.setDefaultValue(0.95)
    args << eff

    # bool argument to remove existing costs
    remove_costs = OpenStudio::Measure::OSArgument.makeBoolArgument('remove_costs', true)
    remove_costs.setDisplayName('Remove Baseline Costs From Effected Cooling Coil DX Two Speed Units?')
    remove_costs.setDefaultValue(true)
    args << remove_costs

    # make an argument for material and installation cost
    material_cost = OpenStudio::Measure::OSArgument.makeDoubleArgument('material_cost', true)
    material_cost.setDisplayName('Material and Installation Costs per Cooling Coil DX Two Speed Unit ($).')
    material_cost.setDefaultValue(0.0)
    args << material_cost

    # make an argument for demolition cost
    demolition_cost = OpenStudio::Measure::OSArgument.makeDoubleArgument('demolition_cost', true)
    demolition_cost.setDisplayName('Demolition Costs per Cooling Coil DX Two Speed Unit ($).')
    demolition_cost.setDefaultValue(0.0)
    args << demolition_cost

    # make an argument for duration in years until costs start
    years_until_costs_start = OpenStudio::Measure::OSArgument.makeIntegerArgument('years_until_costs_start', true)
    years_until_costs_start.setDisplayName('Years Until Costs Start (whole years).')
    years_until_costs_start.setDefaultValue(0)
    args << years_until_costs_start

    # make an argument to determine if demolition costs should be included in initial construction
    demo_cost_initial_const = OpenStudio::Measure::OSArgument.makeBoolArgument('demo_cost_initial_const', true)
    demo_cost_initial_const.setDisplayName('Demolition Costs Occur During Initial Construction?')
    demo_cost_initial_const.setDefaultValue(false)
    args << demo_cost_initial_const

    # make an argument for expected life
    expected_life = OpenStudio::Measure::OSArgument.makeIntegerArgument('expected_life', true)
    expected_life.setDisplayName('Expected Life (whole years).')
    expected_life.setDefaultValue(20)
    args << expected_life

    # make an argument for o&m cost
    om_cost = OpenStudio::Measure::OSArgument.makeDoubleArgument('om_cost', true)
    om_cost.setDisplayName('O & M Costs per Cooling Coil DX Two Speed Unit ($).')
    om_cost.setDefaultValue(0.0)
    args << om_cost

    # make an argument for o&m frequency
    om_frequency = OpenStudio::Measure::OSArgument.makeIntegerArgument('om_frequency', true)
    om_frequency.setDisplayName('O & M Frequency (whole years).')
    om_frequency.setDefaultValue(1)
    args << om_frequency

    return args
  end

  # define what happens when the measure is eff
  def run(model, runner, user_arguments)
    super(model, runner, user_arguments)

    # use the built-in error checking
    if !runner.validateUserArguments(arguments(model), user_arguments)
      return false
    end

    # assign the user inputs to variables
    object = runner.getOptionalWorkspaceObjectChoiceValue('object', user_arguments, model) # model is passed in because of argument type
    eff = runner.getDoubleArgumentValue('eff', user_arguments)
    remove_costs = runner.getBoolArgumentValue('remove_costs', user_arguments)
    material_cost = runner.getDoubleArgumentValue('material_cost', user_arguments)
    demolition_cost = runner.getDoubleArgumentValue('demolition_cost', user_arguments)
    years_until_costs_start = runner.getIntegerArgumentValue('years_until_costs_start', user_arguments)
    demo_cost_initial_const = runner.getBoolArgumentValue('demo_cost_initial_const', user_arguments)
    expected_life = runner.getIntegerArgumentValue('expected_life', user_arguments)
    om_cost = runner.getDoubleArgumentValue('om_cost', user_arguments)
    om_frequency = runner.getIntegerArgumentValue('om_frequency', user_arguments)

    # check the air_loop for reasonableness
    apply_to_all_air_loops = false
    air_loop = nil
    if object.empty?
      handle = runner.getStringArgumentValue('air_loop', user_arguments)
      if handle.empty?
        runner.registerError('No air loop was chosen.')
      else
        runner.registerError("The selected air_loop with handle '#{handle}' was not found in the model. It may have been removed by another measure.")
      end
      return false
    else
      if !object.get.to_AirLoopHVAC.empty?
        air_loop = object.get.to_AirLoopHVAC.get
      elsif !object.get.to_Building.empty?
        apply_to_all_air_loops = true
      else
        runner.registerError('Script Error - argument not showing up as air loop.')
        return false
      end
    end

    # check the user_name for reasonableness
    if eff <= 0
      runner.registerError('Please enter a positive value no greater tan 1 for burner efficiency.')
      return false
    end
    if eff > 1
      runner.registerError('Please enter a positive value no greater tan 1 for burner efficiency.')
      return false
    end
    if eff > 0.99
      runner.registerWarning("The requested burner efficiency of #{eff} seems unusually high")
    end

    # set flags to use later
    costs_requested = false

    # set values to use later
    yr0_capital_totalCosts_baseline = 0
    yr0_capital_totalCosts_proposed = 0

    # If demo_cost_initial_const is true then will be applied once in the lifecycle. Future replacements use the demo cost of the new construction.
    demo_costs_of_baseline_objects = 0

    # check costs for reasonableness
    if material_cost.abs + demolition_cost.abs + om_cost.abs == 0
      runner.registerInfo('No costs were requested for Coil Cooling DX Two Speed units.')
    else
      costs_requested = true
    end

    # check lifecycle arguments for reasonableness
    if (years_until_costs_start < 0) && (years_until_costs_start > expected_life)
      runner.registerError('Years until costs start should be a non-negative integer less than Expected Life.')
    end
    if (expected_life < 1) && (expected_life > 100)
      runner.registerError('Choose an integer greater than 0 and less than or equal to 100 for Expected Life.')
    end
    if om_frequency < 1
      runner.registerError('Choose an integer greater than 0 for O & M Frequency.')
    end

    # short def to make numbers pretty (converts 4125001.25641 to 4,125,001.26 or 4,125,001). The definition be called through this measure
    def neat_numbers(number, roundto = 2) # round to 0 or 2)
      if roundto == 2
        number = format '%.2f', number
      else
        number = number.round
      end
      # regex to add commas
      number.to_s.reverse.gsub(/([0-9]{3}(?=([0-9])))/, '\\1,').reverse
    end

    # helper that loops through lifecycle costs getting total costs under "Construction" or "Salvage" category and add to counter if occurs during year 0
    def get_total_costs_for_objects(objects)
      counter = 0
      objects.each do |object|
        object_LCCs = object.lifeCycleCosts
        object_LCCs.each do |object_LCC|
          if (object_LCC.category == 'Construction') || (object_LCC.category == 'Salvage')
            if object_LCC.yearsFromStart == 0
              counter += object_LCC.totalCost
            end
          end
        end
      end
      return counter
    end

    # get air loops for measure
    if apply_to_all_air_loops
      air_loops = model.getAirLoopHVACs
    else
      air_loops = []
      air_loops << air_loop # only run on a single space type
    end

    # get eff values
    initial_eff_values = []

    # loop through air loops
    air_loops.each do |air_loop|
      supply_components = air_loop.supplyComponents

      # find two speed dx units on loop
      supply_components.each do |supply_component|
        hVACComponent = supply_component.to_CoilHeatingGas
        if !hVACComponent.empty?
          hVACComponent = hVACComponent.get

          # change and report high speed eff
          initial_eff = hVACComponent.gasBurnerEfficiency
          initial_eff_values << initial_eff
          runner.registerInfo("Changing the burner efficiency from #{initial_eff} to #{eff} for gas heating units '#{hVACComponent.name}' on air loop '#{air_loop.name}'")
          hVACComponent.setGasBurnerEfficiency(eff)

          # get initial year 0 cost
          yr0_capital_totalCosts_baseline += get_total_costs_for_objects([hVACComponent])

          # demo value of baseline costs associated with unit
          demo_LCCs = hVACComponent.lifeCycleCosts
          demo_LCCs.each do |demo_LCC|
            if demo_LCC.category == 'Salvage'
              demo_costs_of_baseline_objects += demo_LCC.totalCost
            end
          end

          # remove all old costs to mimic replacement of component vs. an upgrade
          if !hVACComponent.lifeCycleCosts.empty? && (remove_costs == true)
            runner.registerInfo("Removing existing lifecycle cost objects associated with #{hVACComponent.name}")
            removed_costs = hVACComponent.removeLifeCycleCosts
            costs_removed = true
          end

          # add new costs
          if costs_requested == true

            # adding new cost items
            lcc_mat = OpenStudio::Model::LifeCycleCost.createLifeCycleCost("LCC_Mat - #{hVACComponent.name}", hVACComponent, material_cost, 'CostPerEach', 'Construction', expected_life, years_until_costs_start)
            # cost for if demo_initial_Construction == true is added at the end of the measure
            lcc_demo = OpenStudio::Model::LifeCycleCost.createLifeCycleCost("LCC_Demo - #{hVACComponent.name}", hVACComponent, demolition_cost, 'CostPerEach', 'Salvage', expected_life, years_until_costs_start + expected_life)
            lcc_om = OpenStudio::Model::LifeCycleCost.createLifeCycleCost("LCC_OM - #{hVACComponent.name}", hVACComponent, om_cost, 'CostPerEach', 'Maintenance', om_frequency, 0)

            # get final year 0 cost
            yr0_capital_totalCosts_proposed += get_total_costs_for_objects([hVACComponent])

          end

        end
      end
    end

    # add one time demo cost of removed object
    if demo_cost_initial_const == true
      building = model.getBuilding
      lcc_baseline_demo = OpenStudio::Model::LifeCycleCost.createLifeCycleCost('LCC_baseline_demo', building, demo_costs_of_baseline_objects, 'CostPerEach', 'Salvage', 0, years_until_costs_start).get # using 0 for repeat period since one time cost.
      runner.registerInfo("Adding one time cost of $#{neat_numbers(lcc_baseline_demo.totalCost, 0)} related to demolition of baseline objects.")

      # if demo occurs on year 0 then add to initial capital cost counter
      if lcc_baseline_demo.yearsFromStart == 0
        yr0_capital_totalCosts_proposed += lcc_baseline_demo.totalCost
      end
    end

    # reporting initial condition of model
    runner.registerInitialCondition("The starting efficiency values in affected loop(s) range from #{initial_eff_values.min} to #{initial_eff_values.max}. Initial year 0 capital costs for affected Coil Heating Gas units is $#{neat_numbers(yr0_capital_totalCosts_baseline, 0)}.")

    if initial_eff_values.empty?
      runner.registerAsNotApplicable('The affected loop(s) does not contain any Coil Heating Gas units, the model will not be altered.')
      return true
    end

    # reporting final condition of model
    runner.registerFinalCondition("#{initial_eff_values.size} Coil Heating Gas units had their Rated COP values set to #{eff}. Final year 0 capital costs for affected Coil Heating Gas units is $#{neat_numbers(yr0_capital_totalCosts_proposed, 0)}.")

    return true
  end
end

# this allows the measure to be used by the application
SetGasBurnerEfficiency.new.registerWithApplication