/// url = 'http://hl7.org/fhir/StructureMap/Invoice5to4B'
/// name = 'Invoice5to4B'
/// title = 'FML Conversion for Invoice: R5 to R4B'
/// status = 'active'

conceptmap "InvoiceStatus" {
  prefix s = "http://hl7.org/fhir/invoice-status"
  prefix t = "http://hl7.org/fhir/4.3/invoice-status"

  s:draft - t:draft
  s:issued - t:issued
  s:balanced - t:balanced
  s:cancelled - t:cancelled
  s:"entered-in-error" - t:"entered-in-error"
}

uses "http://hl7.org/fhir/StructureDefinition/Invoice" alias InvoiceR5 as source
uses "http://hl7.org/fhir/4.3/StructureDefinition/Invoice" alias InvoiceR4B as target

imports "http://hl7.org/fhir/StructureMap/*5to4B"

group Invoice(source src : InvoiceR5, target tgt : InvoiceR4B) extends DomainResource <<type+>> {
  src.identifier -> tgt.identifier;
  src.status as v -> tgt.status = translate(v, '#InvoiceStatus', 'code');
  src.cancelledReason -> tgt.cancelledReason;
  src.type -> tgt.type;
  src.subject -> tgt.subject;
  src.recipient -> tgt.recipient;
  src.date -> tgt.date;
  src.participant as s -> tgt.participant as t then InvoiceParticipant(s, t); // src.creation -> tgt.creation;
  src.issuer -> tgt.issuer;
  src.account -> tgt.account;
  src.lineItem as s -> tgt.lineItem as t then InvoiceLineItem(s, t);
  src.totalPriceComponent as s -> tgt.totalPriceComponent as t then {
    s.type -> t.type;
    s.code -> t.code;
    s.factor -> t.factor;
    s.amount -> t.amount;
  };
  src.totalNet -> tgt.totalNet;
  src.totalGross -> tgt.totalGross;
  src.paymentTerms -> tgt.paymentTerms;
  src.note -> tgt.note;
}

group InvoiceParticipant(source src, target tgt) extends BackboneElement {
  src.role -> tgt.role;
  src.actor -> tgt.actor;
}

group InvoiceLineItem(source src, target tgt) extends BackboneElement {
  src.sequence -> tgt.sequence;
  src.chargeItem : Reference -> tgt.chargeItem; // src.serviced : date -> tgt.serviced;
  src.chargeItem : CodeableConcept -> tgt.chargeItem;
  src.priceComponent as s -> tgt.priceComponent as t then {
    s.type -> t.type;
    s.code -> t.code;
    s.factor -> t.factor;
    s.amount -> t.amount;
  };
}