define "HIV Status Positive Condition":
  [Condition: Concepts."HIV-positive - HIV.B.DE116"] C
    where C.clinicalStatus ~ ConceptsCustom."active"
      and exists(C.category CC where CC ~ ConceptsCustom."encounter-diagnosis")
    sort by start of onset.toInterval()

define "HIV Status Positive Condition":
  Elements."HIV Status Positive Condition" C
  where C.onset before end of "Measurement Period"

/* End of HIV-inconclusive */

/*
@dataElement: HIV.B.DE115 - HIV status
@activity: HIV.B7 Test for HIV using testing algorithm
@description: HIV status reported after applying the national HIV testing algorithm. No single HIV test can provide an HIV-positive diagnosis.
*/
define "HIV Status Observation":
  [Observation: Concepts."HIV status"] O
    where O.status in { 'final', 'amended', 'corrected' }

define "HIV Status Positive Observation":
"HIV Status Observation" O
    where O.value ~ Concepts."HIV-positive - HIV.B.DE116"
      sort by start of effective.toInterval()

define "HIV Status Positive Observation":
  Elements."HIV Status Positive Observation" O
  where O.issued before end of "Measurement Period"
  or O.effective.toInterval() starts before end of "Measurement Period"

define "Has HIV-positive Status":
  exists "HIV Status Positive Condition"
  or exists "HIV Status Positive Observation"

define "Cervical cancer screening outcome Observation":
  [Observation: Concepts."Cervical cancer screening outcome"] O
    where O.status in { 'final', 'amended', 'corrected' }

define "Positive for cervical precancer lesions Observation":
  "Cervical cancer screening outcome Observation" O
    where O.status in { 'final', 'amended', 'corrected' }
      and O.value ~ Concepts."Positive for cervical precancer lesions"

/* End of Cervical cancer screening outcome */

/*
@dataElement: HIV.D.DE707 - Positive for cervical precancer lesions
@activity: HIV.D28 Offer other services
@description: Screening outcome for cervical precancer lesions is positive
*/

define "Positive for cervical precancer lesions":
  "Positive for cervical precancer lesions Observation"

/* End of Stage IV */

/*
@dataElement: HIV.D.DE718 - Date of treatment for cervical precancer lesions
@activity: HIV.D28 Offer other services
@description: Date of treatment for cervical precancer lesions
*/

define "Date of treatment for cervical precancer lesions":
  [Procedure] P
  where P.status = 'completed'
  and P.code in Concepts."Invasive cervical cancer treatment method Choices"

/**
 * Numerator
 * 
 * Definition: Number of women living with HIV who received treatment after screening positive for pre-invasive cervical disease and were deemed eligible for treatment in line with the WHO recommendations
 * Calculation: COUNT of women with "HIV status"='HIV-positive' AND with a "Date of cervical cancer screening test" in the reporting period for "Cervical cancer screening outcome"='Positive for cervical precancer lesions' AND "Date of treatment for cervical precancer lesions" within 6 months of "Date of cervical cancer screening test"
 */

define "Numerator":
  HIE."Has HIV-positive Status" and
  exists(HE."Positive for cervical precancer lesions" O
  where O.effective.toInterval() during "Measurement Period"
  and exists(HE."Date of treatment for cervical precancer lesions" T where months between start of T.performed.toInterval() and start of O.effective.toInterval() < 6 months))

/**
 * Denominator
 *
 * Definition: Number of women living with HIV who screened positive for pre-invasive cervical disease.
 * Calculation: COUNT of women with "HIV status"='HIV-positive' AND with a "Date of cervical cancer screening test" in the reporting period for "Cervical cancer screening outcome"='Positive for cervical precancer lesions'
 */

define "Denominator":
  HIE."Has HIV-positive Status" and
  exists(HE."Positive for cervical precancer lesions" O
  where O.effective.toInterval() during "Measurement Period")

/* Populations */

/*
 *Initial Population
 */

define "Initial Population":
  true

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
        }

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
        }

define function ToDateTime(value dateTime): value.value

define function ToString(value ObservationStatus): value.value

define function ToDateTime(value instant): value.value

define function ToString(value ProcedureStatus): value.value