/// url = 'http://hl7.org/fhir/StructureMap/ConceptMap4to5'
/// name = 'ConceptMap4to5'
/// title = 'FML Conversion for ConceptMap: R4 to R5'
/// status = 'active'

conceptmap "ConceptMapGroupUnmappedMode" {
  prefix s = "http://hl7.org/fhir/4.0/conceptmap-unmapped-mode"
  prefix t = "http://hl7.org/fhir/conceptmap-unmapped-mode"

  s:provided - t:"use-source-code"
  s:fixed - t:fixed
  s:"other-map" - t:"other-map"
}

conceptmap "ConceptMapRelationship" {
  prefix s = "http://hl7.org/fhir/4.0/concept-map-equivalence"
  prefix t = "http://hl7.org/fhir/concept-map-relationship"

  s:relatedto - t:"related-to"
  s:inexact - t:"related-to"
  s:equivalent - t:equivalent
  s:equal - t:equivalent
  s:wider - t:"source-is-narrower-than-target"
  s:subsumes - t:"source-is-narrower-than-target"
  s:narrower - t:"source-is-broader-than-target"
  s:specializes - t:"source-is-broader-than-target"
  s:unmatched - t:"not-related-to"
}

conceptmap "PublicationStatus" {
  prefix s = "http://hl7.org/fhir/4.0/publication-status"
  prefix t = "http://hl7.org/fhir/publication-status"

  s:draft - t:draft
  s:active - t:active
  s:retired - t:retired
  s:unknown - t:unknown
}

uses "http://hl7.org/fhir/4.0/StructureDefinition/ConceptMap" alias ConceptMapR4 as source
uses "http://hl7.org/fhir/StructureDefinition/ConceptMap" alias ConceptMapR5 as target

imports "http://hl7.org/fhir/StructureMap/*4to5"

group ConceptMap(source src : ConceptMapR4, target tgt : ConceptMapR5) extends DomainResource <<type+>> {
  src.url -> tgt.url;
  src.identifier -> tgt.identifier;
  src.version -> tgt.version;
  src.name -> tgt.name; // src.versionAlgorithm : string -> tgt.versionAlgorithm;
  src.title -> tgt.title;
  src.status as v -> tgt.status = translate(v, '#PublicationStatus', 'code');
  src.experimental -> tgt.experimental;
  src.date -> tgt.date;
  src.publisher -> tgt.publisher;
  src.contact -> tgt.contact;
  src.description -> tgt.description;
  src.useContext -> tgt.useContext;
  src.jurisdiction -> tgt.jurisdiction;
  src.purpose -> tgt.purpose;
  src.copyright -> tgt.copyright;
  src.source : uri -> tgt.sourceScope; // src.copyrightLabel -> tgt.copyrightLabel;
  src.source : canonical -> tgt.sourceScope;
  src.target : uri -> tgt.targetScope;
  src.target : canonical -> tgt.targetScope;
  src.group as s -> tgt.group as t then ConceptMapGroup(s, t);
}

group ConceptMapGroup(source src, target tgt) extends BackboneElement {
  src.source -> tgt.source;
  src.target -> tgt.target;
  src.element as s -> tgt.element as t then ConceptMapGroupElement(s, t);
  src.unmapped as s -> tgt.unmapped as t then ConceptMapGroupUnmapped(s, t);
}

group ConceptMapGroupElement(source src, target tgt) extends BackboneElement {
  src.code -> tgt.code;
  src.display -> tgt.display;
  src where src.target.all(equivalence = 'unmatched') as s ->  tgt.noMap as t,  t.value = 'true' "unmapped"; // src.valueSet -> tgt.valueSet;
  src.target as s where s != unmatched -> tgt.target as t then ConceptMapGroupElementTarget(s, t);
}

group ConceptMapGroupElementTarget(source src, target tgt) extends BackboneElement {
  src.code -> tgt.code;
  src.display -> tgt.display;
  src.equivalence as v -> tgt.relationship = translate(v, '#ConceptMapRelationship', 'code'); // src.valueSet -> tgt.valueSet;
  src.comment -> tgt.comment;
  src.dependsOn as s -> tgt.dependsOn as t then ConceptMapGroupElementTargetDependsOn(s, t); // src.property as s -> tgt.property as t then ConceptMapGroupElementTargetProperty(s,t);
  src.product as s -> tgt.product as t then ConceptMapGroupElementTargetDependsOn(s, t);
}

group ConceptMapGroupElementTargetDependsOn(source src, target tgt) extends BackboneElement {
  src.property -> tgt.attribute;
  src.value where src.system.empty() -> tgt.value; // todo: move the URL to ConceptMap.additionalAttribute - needs a new mapping language feature
  src where src.system.exists() -> tgt.value = create('Coding') as t then {
    src.system -> t.system;
    src.value -> t.code;
    src.display -> t.display;
  } "attributeValue";
}

group ConceptMapGroupUnmapped(source src, target tgt) extends BackboneElement {
  src.mode as v -> tgt.mode = translate(v, '#ConceptMapGroupUnmappedMode', 'code');
  src.code -> tgt.code;
  src.display -> tgt.display;
  src.url -> tgt.otherMap; // src.valueSet -> tgt.valueSet;
}