define "Initial Population":
  AgeInYearsAt(date from start of "Measurement Period") >= 18
    and exists "Diabetic Retinopathy Encounter"

define "Denominator":
  "Initial Population"
    and exists "Macular Exam Performed"

define "Numerator":
  exists "Level of Severity of Retinopathy Findings Communicated"
    and ( exists "Macular Edema Absence Communicated"
        or exists "Macular Edema Presence Communicated"
    )

define "Denominator Exceptions":
  exists "Medical or Patient Reason for Not Communicating Level of Severity of Retinopathy"
    or exists "Medical or Patient Reason for Not Communicating Absence of Macular Edema"
    or exists "Medical or Patient Reason for Not Communicating Presence of Macular Edema"

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 "SDE Sex":
  SDE."SDE Sex"

define "Qualifying Encounter During Day of Measurement Period":
  ( ["Encounter": "Office Visit"]
    union ["Encounter": "Ophthalmological Services"]
    union ["Encounter": "Outpatient Consultation"]
    union ["Encounter": "Care Services in Long-Term Residential Facility"]
    union ["Encounter": "Nursing Facility Visit"] ) QualifyingEncounter
    where QualifyingEncounter.period during day of "Measurement Period"
      and QualifyingEncounter.status = 'finished'
      and QualifyingEncounter.class !~ "virtual"

define "Diabetic Retinopathy Encounter":
  "Qualifying Encounter During Day of Measurement Period" ValidQualifyingEncounter
    with ( ["ConditionProblemsHealthConcerns": "Diabetic Retinopathy"]
      union ["ConditionEncounterDiagnosis": "Diabetic Retinopathy"] ) DiabeticRetinopathy
      such that DiabeticRetinopathy.prevalenceInterval ( ) overlaps day of ValidQualifyingEncounter.period
        and DiabeticRetinopathy.isVerified ( )

define "Level of Severity of Retinopathy Findings Communicated":
  ["Communication": category in "Level of Severity of Retinopathy Findings"] LevelOfSeverityCommunicated
    with "Diabetic Retinopathy Encounter" EncounterDiabeticRetinopathy
      such that LevelOfSeverityCommunicated.sent after start of EncounterDiabeticRetinopathy.period
        and LevelOfSeverityCommunicated.sent during day of "Measurement Period"
    where LevelOfSeverityCommunicated.status = 'completed'

define "Macular Edema Absence Communicated":
  ["Communication": category in "Macular Edema Findings Absent"] MacularEdemaAbsentCommunicated
    with "Diabetic Retinopathy Encounter" EncounterDiabeticRetinopathy
      such that MacularEdemaAbsentCommunicated.sent after start of EncounterDiabeticRetinopathy.period
        and MacularEdemaAbsentCommunicated.sent during day of "Measurement Period"
    where MacularEdemaAbsentCommunicated.status = 'completed'

define "Macular Edema Presence Communicated":
  ["Communication": category in "Macular Edema Findings Present"] MacularEdemaPresentCommunicated
    with "Diabetic Retinopathy Encounter" EncounterDiabeticRetinopathy
      such that MacularEdemaPresentCommunicated.sent after start of EncounterDiabeticRetinopathy.period
        and MacularEdemaPresentCommunicated.sent during "Measurement Period"
    where MacularEdemaPresentCommunicated.status = 'completed'

define "Numerator":
  exists "Level of Severity of Retinopathy Findings Communicated"
    and ( exists "Macular Edema Absence Communicated"
        or exists "Macular Edema Presence Communicated"
    )

define "Initial Population":
  AgeInYearsAt(date from start of "Measurement Period") >= 18
    and exists "Diabetic Retinopathy Encounter"

define "Macular Exam Performed":
  ["ObservationClinicalResult": "Macular Exam"] MacularExam
    with "Diabetic Retinopathy Encounter" EncounterDiabeticRetinopathy
      such that MacularExam.effective.toInterval ( ) during EncounterDiabeticRetinopathy.period
    where MacularExam.value is not null
      and MacularExam.status in { 'final', 'amended', 'corrected' }

define "Denominator":
  "Initial Population"
    and exists "Macular Exam Performed"

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

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

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

define "Medical or Patient Reason for Not Communicating Level of Severity of Retinopathy":
  [CommunicationNotDone: category in "Level of Severity of Retinopathy Findings"] LevelOfSeverityNotCommunicated
    with "Diabetic Retinopathy Encounter" EncounterDiabeticRetinopathy
      such that LevelOfSeverityNotCommunicated.recorded during day of EncounterDiabeticRetinopathy.period
    where ( LevelOfSeverityNotCommunicated.statusReason in "Medical Reason"
        or LevelOfSeverityNotCommunicated.statusReason in "Patient Reason"
    )

/* Note: 
below definition workaround for 
https://oncprojectracking.healthit.gov/support/browse/CQLIT-371. Using value set workaround has been applied for now
but when QI Core STU 5 gets in the tool, it may be reverted back to a DRC */


define "Medical or Patient Reason for Not Communicating Absence of Macular Edema":
  [CommunicationNotDone: category in "Macular Edema Findings Absent"] MacularEdemaAbsentNotCommunicated
    with "Diabetic Retinopathy Encounter" EncounterDiabeticRetinopathy
      such that MacularEdemaAbsentNotCommunicated.recorded during day of EncounterDiabeticRetinopathy.period
    where ( MacularEdemaAbsentNotCommunicated.statusReason in "Medical Reason"
        or MacularEdemaAbsentNotCommunicated.statusReason in "Patient Reason"
    )

define "Medical or Patient Reason for Not Communicating Presence of Macular Edema":
  [CommunicationNotDone: category in "Macular Edema Findings Present"] MacularEdemaPresentNotCommunicated
    with "Diabetic Retinopathy Encounter" EncounterDiabeticRetinopathy
      such that MacularEdemaPresentNotCommunicated.recorded during day of EncounterDiabeticRetinopathy.period
    where ( MacularEdemaPresentNotCommunicated.statusReason in "Medical Reason"
        or MacularEdemaPresentNotCommunicated.statusReason in "Patient Reason"
    )

define "Denominator Exceptions":
  exists "Medical or Patient Reason for Not Communicating Level of Severity of Retinopathy"
    or exists "Medical or Patient Reason for Not Communicating Absence of Macular Edema"
    or exists "Medical or Patient Reason for Not Communicating Presence of Macular Edema"

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 [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
        }