package gw.pcf.rating.rtm
uses gw.rating.rtm.util.AvailableAttributePresenter

class RateTableArgumentSourceHelper {

  var _matchOp : RateTableMatchOp as MatchOp
  var _argSrcSet : RateTableArgumentSourceSet as ArgumentSrcSet
  var _argSrc : RateTableArgumentSource as ArgumentSource

  private construct() {
  }

  construct(mo : RateTableMatchOp, argSrcSet : RateTableArgumentSourceSet) {
    // Q: do we REALLY not want to set _matchOp unless argSrcSet != null?
    // It means if argSrcSet == null, AvailableUsages will be empty and hasMultipleAttributes will be false.
    if (mo != null and argSrcSet != null) {
      _matchOp = mo
      _argSrcSet = argSrcSet
	  _argSrc = argSrcSet.RateTableArgumentSources.firstWhere(\argSrc ->argSrc.Parameter == _matchOp)
    }
  }

  property get AvailableUsages() : List<AvailableAttributePresenter> {
    if (MatchOp == null) {
      return {}
    }
    return MatchOp.getAvailableUsages()
  }

  property get ArgumentSourceWrapper() : AvailableAttributePresenter {
    return ArgumentSource.ArgumentSourceWrapper
  }

  property set ArgumentSourceWrapper(availAttrib : AvailableAttributePresenter) {
    ArgumentSource.ArgumentSourceWrapper = availAttrib
  }

  property get hasMultipleAttributes() : boolean {
    return MatchOp.AvailableAttributes.Count > 1
  }

}