define "Initial Population":
  "ED Encounter with STEMI Diagnosis"

define "Initial Population":
  "ED Encounter with STEMI Diagnosis"

define "Denominator":
  "Initial Population"

define "Denominator Exclusions":
  "Allergy or Intolerance to Thrombolytic Medications Overlaps ED Encounter"
    union "Adverse Effect to Thrombolytic Medications Before End of ED Encounter"
    union "Active Exclusion Diagnosis at Start of ED Encounter"
    union "Active use of Anticoagulants"
    union "Exclusion Diagnosis During ED Encounter or Within 24 Hours of ED Encounter Start"
    union "Major Surgical Procedure 21 Days or Less Before Start of or Starts During ED Encounter"
    union "Intubation or Mechanical Circulatory Assist Device Placement or Removal Procedure During ED Encounter or Within 24 Hours of ED Encounter Start"
    union "Active Exclusion Diagnosis Within 90 Days Before or At the Start of ED Encounter"
    union "Intracranial or Intraspinal Procedure 90 Days or Less Before Start of ED Encounter"
    union "ED Encounter with Discharge Disposition as Patient Expired"
    union "ED Encounter with Discharge Disposition as Left Against Medical Advice"
    union "ED Encounter with Hospice Services"
    union "Currently Pregnant"

define "Numerator":
  "Fibrinolytic Therapy Administration within 30 Minutes of Arrival"
    union "PCI within 90 Minutes of Arrival"
    union "ED Departure with Discharge to Acute Care Facility Within 45 Minutes Of Arrival"

define "Denominator Exceptions":
  "Received tPA in Another Facility within 24 hours Prior to Admission"
    union "ED Encounter with a Documented Reason for No PCI Performed"
    union "ED Encounter with a Documented Reason for Not Administering Fibrinolytic Therapy"

define "SDE Sex":
  case
    when Patient.sex = '248153007' then "Male (finding)"
    when Patient.sex = '248152002' then "Female (finding)"
    else null
  end

define "SDE Payer":
  [Coverage: type in "Payer Type"] Payer
    return {
      code: Payer.type,
      period: Payer.period
    }

define "SDE Ethnicity":
  Patient.ethnicity E
    return Tuple {
      codes: { E.ombCategory } union E.detailed,
      display: E.text
    }

define "SDE Race":
  Patient.race R
    return Tuple {
      codes: R.ombCategory union R.detailed,
      display: R.text
    }

define function ToString(value uri): value.value

/*
@description: Converts the given [Period](https://hl7.org/fhir/datatypes.html#Period)
value to a CQL DateTime Interval
@comment: If the start value of the given period is unspecified, the starting
boundary of the resulting interval will be open (meaning the start of the interval
is unknown, as opposed to interpreted as the beginning of time).
*/
define function ToInterval(period FHIR.Period):
    if period is null then
        null
    else
        if period."start" is null then
            Interval(period."start".value, period."end".value]
        else
            Interval[period."start".value, period."end".value]

/*
@description: Converts the given FHIR [CodeableConcept](https://hl7.org/fhir/datatypes.html#CodeableConcept) value to a CQL Concept.
*/
define function ToConcept(concept FHIR.CodeableConcept):
    if concept is null then
        null
    else
        System.Concept {
            codes: concept.coding C return ToCode(C),
            display: concept.text.value
        }

/*
@description: Converts the given FHIR [Coding](https://hl7.org/fhir/datatypes.html#Coding) value to a CQL Code.
*/
define function ToCode(coding FHIR.Coding):
    if coding is null then
        null
    else
        System.Code {
          code: coding.code.value,
          system: coding.system.value,
          version: coding.version.value,
          display: coding.display.value
        }

/*  
@description: Returns the Condition resources referenced by the diagnosis element of the Encounter  
*/
define fluent function encounterDiagnosis(Encounter Encounter ):
  Encounter.reasonReference D
    return singleton from (([ConditionEncounterDiagnosis] union [ConditionProblemsHealthConcerns]) C where D.references(C.id))

/*
@description: Returns the Location resource specified by the given reference
@deprecated: This function is deprecated. Use the fluent function `getLocation()` instead.
*/
define function "GetLocation"(reference Reference):
  singleton from (
    [Location] L where reference.references(L)
  )

define "SDE Sex":
  SDE."SDE Sex"

define "ED Encounter During MP":
  ["Encounter": "Emergency Department Evaluation and Management Visit"] EDEncounter
    where EDEncounter.period ends during day of "Measurement Period"
      and EDEncounter.status = 'finished'
      and AgeInYearsAt(date from start of(EDEncounter.period)) >= 18

define "ED Encounter with STEMI Diagnosis":
  "ED Encounter During MP" EDEncounterinMP
    where ( EDEncounterinMP.reasonCode in "STEMI"
        or exists ( ( [ConditionProblemsHealthConcerns: "STEMI"]
            union [ConditionEncounterDiagnosis: "STEMI"] ) DxSTEMI
            where ( EDEncounterinMP.encounterDiagnosis ( ).code in "STEMI"
                or ( DxSTEMI.prevalenceInterval ( ) starts during EDEncounterinMP.period )
            )
              and ( DxSTEMI.verificationStatus is not null implies ( DxSTEMI.verificationStatus ~ QICoreCommon."confirmed"
                    or DxSTEMI.verificationStatus ~ QICoreCommon."unconfirmed"
                    or DxSTEMI.verificationStatus ~ QICoreCommon."provisional"
                    or DxSTEMI.verificationStatus ~ QICoreCommon."differential"
                )
              )
        )
    )

define "Fibrinolytic Therapy Administration within 30 Minutes of Arrival":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ["MedicationAdministration": "Fibrinolytic Therapy"] Fibrinolytic
      such that Fibrinolytic.status = 'completed'
        and start of ( Fibrinolytic.effective.toInterval ( ) ) 30 minutes or less after EDwithSTEMI.currentemergencyDepartmentArrivalTime ( )

define "PCI within 90 Minutes of Arrival":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ["Procedure": "Percutaneous Coronary Intervention"] PCI
      such that PCI.performed.toInterval ( ) starts 90 minutes or less after EDwithSTEMI.currentemergencyDepartmentArrivalTime ( )
        and PCI.status = 'completed'

define "ED Departure with Discharge to Acute Care Facility Within 45 Minutes Of Arrival":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    where EDwithSTEMI.currentemergencyDepartmentDepartTime ( ) 45 minutes or less after EDwithSTEMI.currentemergencyDepartmentArrivalTime ( )
      and EDwithSTEMI.hospitalization.dischargeDisposition in "Discharge To Acute Care Facility"

define "Numerator":
  "Fibrinolytic Therapy Administration within 30 Minutes of Arrival"
    union "PCI within 90 Minutes of Arrival"
    union "ED Departure with Discharge to Acute Care Facility Within 45 Minutes Of Arrival"

define "Initial Population":
  "ED Encounter with STEMI Diagnosis"

define "Denominator":
  "Initial Population"

define "SDE Payer":
  SDE."SDE Payer"

define "Initial Population":
  "ED Encounter with STEMI Diagnosis"

define "SDE Ethnicity":
  SDE."SDE Ethnicity"

define "Allergy or Intolerance to Thrombolytic Medications Overlaps ED Encounter":
  "ED Encounter with STEMI Diagnosis" EDwSTEMI
    with ["AllergyIntolerance": "Thrombolytic medications"] ThrombolyticAllergy
      such that ThrombolyticAllergy.clinicalStatus ~ QICoreCommon."allergy-active"
        and ( ThrombolyticAllergy.verificationStatus is not null implies ( ThrombolyticAllergy.verificationStatus ~ QICoreCommon."allergy-confirmed"
              or ThrombolyticAllergy.verificationStatus ~ QICoreCommon."allergy-unconfirmed"
          )
        )
        and ( ThrombolyticAllergy.onset.toInterval ( ) overlaps ( EDwSTEMI.period ) )

define "Adverse Effect to Thrombolytic Medications Before End of ED Encounter":
  "ED Encounter with STEMI Diagnosis" EDwSTEMI
    with [AdverseEvent: "Thrombolytics Adverse Event"] ThrombolyticAdverseEvent
      such that Coalesce(ThrombolyticAdverseEvent.date, ThrombolyticAdverseEvent.detected, ThrombolyticAdverseEvent.recordedDate) before end of ( EDwSTEMI.period )
        and ThrombolyticAdverseEvent.actuality = 'actual'

define "Active Exclusion Diagnosis at Start of ED Encounter":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ( ["ConditionProblemsHealthConcerns": "Active Bleeding or Bleeding Diathesis, Excluding Menses"]
      union ["ConditionProblemsHealthConcerns": "Malignant Intracranial Neoplasm Group"]
      union ["ConditionProblemsHealthConcerns": "Cerebral Vascular Lesion"]
      union ["ConditionProblemsHealthConcerns": "Dementia and Related Intracranial Pathologies"]
      union ["ConditionProblemsHealthConcerns": "Pregnant State"]
      union ["ConditionProblemsHealthConcerns": "Allergy to thrombolytics"] ) ActiveExclusionDx
      such that ActiveExclusionDx.prevalenceInterval ( ) overlaps before ( EDwithSTEMI.period )
        and ( ActiveExclusionDx.verificationStatus is not null implies ( ActiveExclusionDx.verificationStatus ~ QICoreCommon."confirmed"
              or ActiveExclusionDx.verificationStatus ~ QICoreCommon."unconfirmed"
              or ActiveExclusionDx.verificationStatus ~ QICoreCommon."provisional"
              or ActiveExclusionDx.verificationStatus ~ QICoreCommon."differential"
          )
        )

define "Active Oral Anticoagulant Medication at the Start of ED Encounter":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ["MedicationRequest": "Oral Anticoagulant Medications"] OralAnticoagulant
      such that OralAnticoagulant.status in { 'active', 'completed' }
        and OralAnticoagulant.intent = 'order'
        and OralAnticoagulant.authoredOn 90 days or less before or on start of EDwithSTEMI.period

define "Active Long Term use of Anticoagulants":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ["ConditionProblemsHealthConcerns": "Long term (current) use of anticoagulants"] LongTermAnticoagulant
      such that ( LongTermAnticoagulant.prevalenceInterval ( ) starts before or on start of EDwithSTEMI.period
          and LongTermAnticoagulant.prevalenceInterval ( ) ends on or after start of EDwithSTEMI.period
      )
        and ( LongTermAnticoagulant.verificationStatus is not null implies ( LongTermAnticoagulant.verificationStatus ~ QICoreCommon."confirmed"
              or LongTermAnticoagulant.verificationStatus ~ QICoreCommon."unconfirmed"
              or LongTermAnticoagulant.verificationStatus ~ QICoreCommon."provisional"
              or LongTermAnticoagulant.verificationStatus ~ QICoreCommon."differential"
          )
        )

define "Active use of Anticoagulants":
  "Active Oral Anticoagulant Medication at the Start of ED Encounter"
    union "Active Long Term use of Anticoagulants"

define "Exclusion Diagnosis During ED Encounter or Within 24 Hours of ED Encounter Start":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ( ["ConditionProblemsHealthConcerns": "Aortic Dissection or Ruptured Aortic Aneurysm"]
      union ["ConditionProblemsHealthConcerns": "Neurologic impairment"]
      union ["ConditionProblemsHealthConcerns": "Angina pectoris with documented spasm"]
      union ["ConditionProblemsHealthConcerns": "Ventricular aneurysm due to and following acute myocardial infarction (disorder)"]
      union ["ConditionProblemsHealthConcerns": "Aneurysm of heart"]
      union ["ConditionProblemsHealthConcerns": "Takotsubo cardiomyopathy (disorder)"]
      union ["ConditionProblemsHealthConcerns": "Takotsubo syndrome"]
      union ["ConditionProblemsHealthConcerns": "Cardiopulmonary Emergency"] ) ExclusionDiagnosis
      such that ( ( ExclusionDiagnosis.prevalenceInterval ( ) starts during EDwithSTEMI.period )
          or ( ExclusionDiagnosis.prevalenceInterval ( ) starts 24 hours or less before start of EDwithSTEMI.period )
      )
        and ( ExclusionDiagnosis.verificationStatus is not null implies ( ExclusionDiagnosis.verificationStatus ~ QICoreCommon."confirmed"
              or ExclusionDiagnosis.verificationStatus ~ QICoreCommon."unconfirmed"
              or ExclusionDiagnosis.verificationStatus ~ QICoreCommon."provisional"
              or ExclusionDiagnosis.verificationStatus ~ QICoreCommon."differential"
          )
        )

define "Major Surgical Procedure 21 Days or Less Before Start of or Starts During ED Encounter":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ["Procedure": "Major Surgical Procedure"] MajorSurgery
      such that ( MajorSurgery.performed.toInterval ( ) starts 21 days or less before start of EDwithSTEMI.period
          or MajorSurgery.performed.toInterval ( ) starts during EDwithSTEMI.period
      )
        and MajorSurgery.status = 'completed'

define "Intubation or Mechanical Circulatory Assist Device Placement or Removal Procedure During ED Encounter or Within 24 Hours of ED Encounter Start":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ( ["Procedure": "Endotracheal Intubation"]
      union ["Procedure": "Mechanical Circulatory Assist Device"] ) AirwayProcedure
      such that ( ( AirwayProcedure.performed.toInterval ( ) starts during ( EDwithSTEMI.period ) )
          or ( AirwayProcedure.performed.toInterval ( ) starts 24 hours or less before start of ( EDwithSTEMI.period ) )
      )
        and AirwayProcedure.status = 'completed'

define "Active Exclusion Diagnosis Within 90 Days Before or At the Start of ED Encounter":
  "ED Encounter with STEMI Diagnosis" EDwSTEMI
    with ( ["ConditionProblemsHealthConcerns": "Ischemic Stroke"]
      union ["ConditionProblemsHealthConcerns": "Closed Head and Facial Trauma"]
      union ["ConditionProblemsHealthConcerns": "Active Peptic Ulcer"] ) ExclusionCondition
      such that ExclusionCondition.prevalenceInterval ( ) starts during Interval[start of ( EDwSTEMI.period ) - 90 days, start of ( EDwSTEMI.period )]
        and ( ExclusionCondition.verificationStatus is not null implies ( ExclusionCondition.verificationStatus ~ QICoreCommon."confirmed"
              or ExclusionCondition.verificationStatus ~ QICoreCommon."unconfirmed"
              or ExclusionCondition.verificationStatus ~ QICoreCommon."provisional"
              or ExclusionCondition.verificationStatus ~ QICoreCommon."differential"
          )
        )

define "Intracranial or Intraspinal Procedure 90 Days or Less Before Start of ED Encounter":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ["Procedure": "Intracranial or Intraspinal surgery"] CranialorSpinalSurgery
      such that CranialorSpinalSurgery.performed.toInterval ( ) starts 90 days or less before start of ( EDwithSTEMI.period )
        and CranialorSpinalSurgery.status = 'completed'

define "ED Encounter with Discharge Disposition as Patient Expired":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    where EDwithSTEMI.hospitalization.dischargeDisposition in "Patient Expired"

define "ED Encounter with Discharge Disposition as Left Against Medical Advice":
  "ED Encounter with STEMI Diagnosis" EDwSTEMI
    where EDwSTEMI.hospitalization.dischargeDisposition in "Left Against Medical Advice"

define "ED Encounter with Hospice Services":
  from
    "ED Encounter with STEMI Diagnosis" EDwSTEMI
    let SixMonthsBeforeToEndOfSTEMI: Interval[start of ( EDwSTEMI.period ) - 6 months, end of ( EDwSTEMI.period )]
    where ( exists ( ( [Encounter: "Encounter Inpatient"] ) InpatientEncounter
          where ( InpatientEncounter.hospitalization.dischargeDisposition ~ "Discharge to home for hospice care (procedure)"
              or InpatientEncounter.hospitalization.dischargeDisposition ~ "Discharge to healthcare facility for hospice care (procedure)"
          )
            and InpatientEncounter.status = 'finished'
            and InpatientEncounter.period starts before or on start of ( EDwSTEMI.period )
            and InpatientEncounter.period overlaps day of SixMonthsBeforeToEndOfSTEMI
      )
        or exists ( ( [Encounter: "Hospice Encounter"] ) HospiceEncounter
            where HospiceEncounter.period starts before or on start of ( EDwSTEMI.period )
              and ( HospiceEncounter.period overlaps day of SixMonthsBeforeToEndOfSTEMI )
              and HospiceEncounter.status = 'finished'
        )
        or exists ( ( ( [ObservationScreeningAssessment: "Hospice care [Minimum Data Set]"] ).isAssessmentPerformed ( ) ) HospiceAssessment
            where ( HospiceAssessment as ObservationScreeningAssessment ).value ~ "Yes (qualifier value)"
              and HospiceAssessment.effective.toInterval ( ) starts before or on start of ( EDwSTEMI.period )
              and ( HospiceAssessment.effective.toInterval ( ) overlaps day of SixMonthsBeforeToEndOfSTEMI )
        )
        or exists ( ( ( [ServiceRequest: "Hospice Care Ambulatory"] ).isInterventionOrder ( ) ) HospiceOrder
            where HospiceOrder.authoredOn 6 months or less before start of ( EDwSTEMI.period )
        )
        or exists ( ( ( [Procedure: "Hospice Care Ambulatory"] ).isInterventionPerformed ( ) ) HospicePerformed
            where HospicePerformed.performed.toInterval ( ) starts before or on start of ( EDwSTEMI.period )
              and ( HospicePerformed.performed.toInterval ( ) overlaps day of SixMonthsBeforeToEndOfSTEMI )
        )
        or exists ( ( [ConditionProblemsHealthConcerns: "Hospice Diagnosis"] ) HospiceCareDiagnosis
            where HospiceCareDiagnosis.prevalenceInterval ( ) ends on or after start of ( EDwSTEMI.period )
              and ( HospiceCareDiagnosis.verificationStatus is not null implies ( HospiceCareDiagnosis.verificationStatus ~ QICoreCommon."confirmed"
                    or HospiceCareDiagnosis.verificationStatus ~ QICoreCommon."unconfirmed"
                    or HospiceCareDiagnosis.verificationStatus ~ QICoreCommon."provisional"
                    or HospiceCareDiagnosis.verificationStatus ~ QICoreCommon."differential"
                )
              )
        )
    )

define "Currently Pregnant":
  "ED Encounter with STEMI Diagnosis" EDwSTEMI
    with ( ["USCoreObservationPregnancyStatusProfile"] ) PregStatus
      such that PregStatus.status = 'final'
        and ( PregStatus.value in "Pregnant State" )
        and ( PregStatus.effective.toInterval ( ) overlaps EDwSTEMI.period )

define "Denominator Exclusions":
  "Allergy or Intolerance to Thrombolytic Medications Overlaps ED Encounter"
    union "Adverse Effect to Thrombolytic Medications Before End of ED Encounter"
    union "Active Exclusion Diagnosis at Start of ED Encounter"
    union "Active use of Anticoagulants"
    union "Exclusion Diagnosis During ED Encounter or Within 24 Hours of ED Encounter Start"
    union "Major Surgical Procedure 21 Days or Less Before Start of or Starts During ED Encounter"
    union "Intubation or Mechanical Circulatory Assist Device Placement or Removal Procedure During ED Encounter or Within 24 Hours of ED Encounter Start"
    union "Active Exclusion Diagnosis Within 90 Days Before or At the Start of ED Encounter"
    union "Intracranial or Intraspinal Procedure 90 Days or Less Before Start of ED Encounter"
    union "ED Encounter with Discharge Disposition as Patient Expired"
    union "ED Encounter with Discharge Disposition as Left Against Medical Advice"
    union "ED Encounter with Hospice Services"
    union "Currently Pregnant"

define "SDE Race":
  SDE."SDE Race"

define "Received tPA in Another Facility within 24 hours Prior to Admission":
  "ED Encounter with STEMI Diagnosis" EDwithSTEMI
    with ( ["ConditionProblemsHealthConcerns": "Status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility"] ) TPA
      such that TPA.prevalenceInterval ( ) starts during EDwithSTEMI.period
        and ( TPA.verificationStatus is not null implies ( TPA.verificationStatus ~ QICoreCommon."confirmed"
              or TPA.verificationStatus ~ QICoreCommon."unconfirmed"
              or TPA.verificationStatus ~ QICoreCommon."provisional"
              or TPA.verificationStatus ~ QICoreCommon."differential"
          )
        )

define "ED Encounter with a Documented Reason for No PCI Performed":
  "ED Encounter with STEMI Diagnosis" EDwSTEMI
    with ["ProcedureNotDone": "Percutaneous Coronary Intervention"] PCINotDone
      such that ( PCINotDone.statusReason in "Patient Refusal"
          or PCINotDone.statusReason in "Procedure Not Indicated/Contraindicated"
      )
        and PCINotDone.recorded during EDwSTEMI.period

define "ED Encounter with a Documented Reason for Not Administering Fibrinolytic Therapy":
  "ED Encounter with STEMI Diagnosis" EDwSTEMI
    with ["MedicationAdministrationNotDone": "Fibrinolytic Therapy"] FibrinolyticNoMed
      such that ( FibrinolyticNoMed.statusReason in "Patient Refusal"
          or FibrinolyticNoMed.statusReason in "Drug Intervention Not Indicated/Contraindicated"
      )
        and FibrinolyticNoMed.recorded during EDwSTEMI.period

define "Denominator Exceptions":
  "Received tPA in Another Facility within 24 hours Prior to Admission"
    union "ED Encounter with a Documented Reason for No PCI Performed"
    union "ED Encounter with a Documented Reason for Not Administering Fibrinolytic Therapy"

define fluent function currentemergencyDepartmentArrivalTime(EDEncounter Encounter):
  First(EDEncounter.location EDLocation
      where exists((CQMCommon.GetLocation(EDLocation.location).type) LocationType
          where(LocationType in "Emergency Department Visit"
              or LocationType ~ "Emergency room"
          )
            and start of EDLocation.period is not null
      )
      return start of EDLocation.period
      sort ascending
  )

define fluent function currentemergencyDepartmentDepartTime(EDEncounter Encounter):
  Last(EDEncounter.location EDLocation
      where exists((CQMCommon.GetLocation(EDLocation.location).type) LocationType
          where(LocationType in "Emergency Department Visit"
              or LocationType ~ "Emergency room"
          )
            and 
            end of EDLocation.period is not null
      )
      return 
      end of EDLocation.period
      sort ascending
  )

/*
@description: Returns true if the given reference is to the given resourceId
@comment: Returns true if the `resourceId` parameter exactly equals the tail of the given reference.
NOTE: This function assumes resources from the same source server.
*/
define fluent function references(reference Reference, resourceId String):
  resourceId = Last(Split(reference.reference, '/'))

/*
@description: Returns true if the given reference is to the given resource
@comment: Returns true if the `id` element of the given resource exactly equals the tail of the given reference.
NOTE: This function assumes resources from the same source server.
*/
define fluent function references(reference Reference, resource Resource):
  resource.id = Last(Split(reference.reference, '/'))

/*
@description: Normalizes a value that is a choice of timing-valued types to an equivalent interval
@comment: Normalizes a choice type of DateTime, Quanitty, Interval<DateTime>, or Interval<Quantity> types
to an equivalent interval. This selection of choice types is a superset of the majority of choice types that are used as possible
representations for timing-valued elements in QICore, allowing this function to be used across any resource.
The input can be provided as a DateTime, Quantity, Interval<DateTime> or Interval<Quantity>.
The intent of this function is to provide a clear and concise mechanism to treat single
elements that have multiple possible representations as intervals so that logic doesn't have to account
for the variability. More complex calculations (such as medication request period or dispense period
calculation) need specific guidance and consideration. That guidance may make use of this function, but
the focus of this function is on single element calculations where the semantics are unambiguous.
If the input is a DateTime, the result a DateTime Interval beginning and ending on that DateTime.
If the input is a Quantity, the quantity is expected to be a calendar-duration interpreted as an Age,
and the result is a DateTime Interval beginning on the Date the patient turned that age and ending immediately before one year later.
If the input is a DateTime Interval, the result is the input.
If the input is a Quantity Interval, the quantities are expected to be calendar-durations interpreted as an Age, and the result
is a DateTime Interval beginning on the date the patient turned the age given as the start of the quantity interval, and ending
immediately before one year later than the date the patient turned the age given as the end of the quantity interval.
If the input is a Timing, an error will be thrown indicating that Timing calculations are not implemented. Any other input will reslt in a null DateTime Interval
*/
define fluent function toInterval(choice Choice<DateTime, Quantity, Interval<DateTime>, Interval<Quantity>, Timing>):
  case
	  when choice is DateTime then
    	Interval[choice as DateTime, choice as DateTime]
		when choice is Interval<DateTime> then
  		choice as Interval<DateTime>
		when choice is Quantity then
		  Interval[Patient.birthDate + (choice as Quantity),
			  Patient.birthDate + (choice as Quantity) + 1 year)
		when choice is Interval<Quantity> then
		  Interval[Patient.birthDate + (choice.low as Quantity),
			  Patient.birthDate + (choice.high as Quantity) + 1 year)
		when choice is Timing then
      Message(null, true, 'NOT_IMPLEMENTED', 'Error', 'Calculation of an interval from a Timing value is not supported') as Interval<DateTime>
		else
			null as Interval<DateTime>
	end

/*
@description: Returns an interval representing the normalized prevalence period of a given Condition.
@comment: Uses the ToInterval and ToAbatementInterval functions to determine the widest potential interval from
onset to abatement as specified in the given Condition. If the condition is active, or has an abatement date the resulting 
interval will have a closed ending boundary. Otherwise, the resulting interval will have an open ending boundary.
*/
define fluent function prevalenceInterval(condition Choice<"ConditionEncounterDiagnosis", "ConditionProblemsHealthConcerns">):
if condition.clinicalStatus ~ "active"
  or condition.clinicalStatus ~ "recurrence"
  or condition.clinicalStatus ~ "relapse" then
  Interval[start of condition.onset.toInterval(), end of condition.abatementInterval()]
else
    (end of condition.abatementInterval()) abatementDate
    return if abatementDate is null then
      Interval[start of condition.onset.toInterval(), abatementDate)
    else
      Interval[start of condition.onset.toInterval(), abatementDate]

/*
@description: Returns an interval representing the normalized abatement of a given Condition.
@comment: If the abatement element of the Condition is represented as a DateTime, the result
is an interval beginning and ending on that DateTime.
If the abatement is represented as a Quantity, the quantity is expected to be a calendar-duration and is interpreted as the age of the patient. The
result is an interval from the date the patient turned that age to immediately before one year later.
If the abatement is represented as a Quantity Interval, the quantities are expected to be calendar-durations and are interpreted as an age range during
which the abatement occurred. The result is an interval from the date the patient turned the starting age of the quantity interval, and ending immediately
before one year later than the date the patient turned the ending age of the quantity interval.
*/
define fluent function abatementInterval(condition Choice<"ConditionEncounterDiagnosis", "ConditionProblemsHealthConcerns">):
	if condition.abatement is DateTime then
	  Interval[condition.abatement as DateTime, condition.abatement as DateTime]
	else if condition.abatement is Quantity then
		Interval[Patient.birthDate + (condition.abatement as Quantity),
			Patient.birthDate + (condition.abatement as Quantity) + 1 year)
	else if condition.abatement is Interval<Quantity> then
	  Interval[Patient.birthDate + (condition.abatement.low as Quantity),
		  Patient.birthDate + (condition.abatement.high as Quantity) + 1 year)
	else if condition.abatement is Interval<DateTime> then
	  Interval[condition.abatement.low, condition.abatement.high)
	else null as Interval<DateTime>

//This library contains functions used to constrain FHIR resource elements for measures authored by NCQA, based on QICore 6.0.0 resources including IG and authoring patterns. The functions may appear similar to some QICoreCommon functions but differ in that they have constraints that are relevant for measures authored by NCQA.

//Assessment, Performed
define fluent function isAssessmentPerformed(Obs List<ObservationScreeningAssessment>):
  Obs O
    where O.status in { 'final', 'amended', 'corrected' }

//Intervention, Order
define fluent function isInterventionOrder(ServiceRequest List<ServiceRequest>):
  ServiceRequest S
    where S.status in { 'active', 'completed' }
      and S.intent = 'order'

//Intervention, Performed
define fluent function isInterventionPerformed(Proc List<Procedure>):
  Proc P
    where P.status ~ 'completed'