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# see the URL below for information on how to write OpenStudio measures
# http://openstudio.nrel.gov/openstudio-measure-writing-guide

# see the URL below for information on using life cycle cost objects in OpenStudio
# http://openstudio.nrel.gov/openstudio-life-cycle-examples

# see the URL below for access to C++ documentation on model objects (click on "model" in the main window to view model objects)
# http://openstudio.nrel.gov/sites/openstudio.nrel.gov/files/nv_data/cpp_documentation_it/model/html/namespaces.html

# start the measure
class SetInteriorWallsToSelectedConstruction < 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 'SetInteriorWallsToSelectedConstruction'
  end

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

    # populate choice argument for storys that are applied to surfaces in the model
    construction_handles = OpenStudio::StringVector.new
    construction_display_names = OpenStudio::StringVector.new

    # putting stories and names into hash
    construction_args = model.getConstructions
    construction_args_hash = {}
    construction_args.each do |construction_arg|
      construction_args_hash[construction_arg.name.to_s] = construction_arg
    end

    # looping through sorted hash of constructions
    construction_args_hash.sort.map do |key, value| # todo - could filter this so only constructions that are valid on opaque surfaces will show up.
      construction_handles << value.handle.to_s
      construction_display_names << key
    end

    # make an argument for construction
    construction = OpenStudio::Measure::OSArgument.makeChoiceArgument('construction', construction_handles, construction_display_names, true)
    construction.setDisplayName('Select new material:')
    args << construction

    return args
  end

  # define what happens when the measure is run
  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
    construction = runner.getOptionalWorkspaceObjectChoiceValue('construction', user_arguments, model) # model is passed in because of argument type

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

    # counter for number of constructions use for interior walls in initial construction
    interior_walls = 0

    # change mats
    surfaces = model.getSurfaces
    surfaces.each do |surface|
      if (surface.surfaceType == 'Wall') && (surface.outsideBoundaryCondition == 'Surface')
        surface.setConstruction(construction)
        interior_walls += 1
      end
    end

    # reporting initial condition of model
    runner.registerInitialCondition("The initial model has #{interior_walls / 2} pairs of interior wall surfaces.")

    # reporting final condition of model
    finishing_spaces = model.getSpaces
    runner.registerFinalCondition("All interior walls surfaces now use #{construction.name} for the construction.")

    return true
  end
end

# this allows the measure to be use by the application
SetInteriorWallsToSelectedConstruction.new.registerWithApplication