define "Initial Population":
  ( "Has Encounter during Measurement Period"
      or "Has Intervention during Measurement Period"
  )
    and "First Referral during First 10 Months of Measurement Period" is not null

define "Initial Population":
  ( "Has Encounter during Measurement Period"
      or "Has Intervention during Measurement Period"
  )
    and "First Referral during First 10 Months of Measurement Period" is not null

define "Denominator":
  "Initial Population"

define "Numerator":
  "Referring Clinician Receives Consultant Report to Close Referral Loop"

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 "First Referral during First 10 Months of Measurement Period":
  First([ServiceRequest: "Referral"] ReferralOrder
      where ReferralOrder.status in { 'active', 'completed' }
        and ReferralOrder.intent = 'order'
        and ReferralOrder.authoredOn during day of Interval[start of "Measurement Period", Date(year from start of "Measurement Period", 10, 31)]
      return {
        ID: ReferralOrder.id,
        AuthorDate: ReferralOrder.authoredOn
      }
      sort by AuthorDate ascending
  )

define "Referring Clinician Receives Consultant Report to Close Referral Loop":
  exists ( [Task: "Consultant Report"] ConsultantReportObtained
      with "First Referral during First 10 Months of Measurement Period" FirstReferral
        such that FirstReferral.ID in "TaskGetRequestID"(ConsultantReportObtained)
          and ConsultantReportObtained.executionPeriod ends after FirstReferral.AuthorDate
          and ConsultantReportObtained.status = 'completed'
          and ConsultantReportObtained.executionPeriod ends during day of "Measurement Period"
  )

define "Numerator":
  "Referring Clinician Receives Consultant Report to Close Referral Loop"

define "Has Encounter during Measurement Period":
  exists ( ( ["Encounter": type in "Office Visit"]
      union ["Encounter": type in "Ophthalmological Services"]
      union ["Encounter": type in "Preventive Care Services Established Office Visit, 18 and Up"]
      union ["Encounter": type in "Preventive Care Services, Initial Office Visit, 0 to 17"]
      union ["Encounter": type in "Preventive Care Services Initial Office Visit, 18 and Up"]
      union ["Encounter": type in "Preventive Care, Established Office Visit, 0 to 17"] ) ValidEncounter
      where ValidEncounter.status = 'finished'
        and ValidEncounter.period.toInterval ( ) during day of "Measurement Period"
  )

define "Has Intervention during Measurement Period":
  exists ( ( ( ["Procedure": "Behavioral/Neuropsych Assessment"]
        union ["Procedure": "Health behavior assessment, or re-assessment (ie, health-focused clinical interview, behavioral observations, clinical decision making)"]
        union ["Procedure": "Psychological or neuropsychological test administration and scoring by physician or other qualified health care professional, two or more tests, any method; first 30 minutes"]
        union ["Procedure": "Psychological or neuropsychological test administration and scoring by technician, two or more tests, any method; first 30 minutes"]
        union ["Procedure": "Psychotherapy for crisis; first 60 minutes"]
        union ["Procedure": "Psych Visit Diagnostic Evaluation"]
        union ["Procedure": "Developmental test administration (including assessment of fine and/or gross motor, language, cognitive level, social, memory and/or executive functions by standardized developmental instruments when performed), by physician or other qualified health care professional, with interpretation and report; first hour"]
    ).isProcedurePerformed ( ) ) ValidIntervention
      where ValidIntervention.performed.toInterval ( ) during day of "Measurement Period"
  )

define "Initial Population":
  ( "Has Encounter during Measurement Period"
      or "Has Intervention during Measurement Period"
  )
    and "First Referral during First 10 Months of Measurement Period" is not null

define "Denominator":
  "Initial Population"

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

define "Initial Population":
  ( "Has Encounter during Measurement Period"
      or "Has Intervention during Measurement Period"
  )
    and "First Referral during First 10 Months of Measurement Period" is not null

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

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

define function "TaskGetRequestID"(task Task):
  task.basedOn Task
    return QICoreCommon."GetId" ( Task.reference )

/*
@description: Returns the tail of the given uri (i.e. everything after the last slash in the URI).
@comment: This function can be used to determine the logical id of a given resource. It can be used in
a single-server environment to trace references. However, this function does not attempt to resolve
or distinguish the base of the given url, and so cannot be used safely in multi-server environments.
@deprecated: This function is deprecated. Use the fluent function `getId()` instead
*/
define function GetId(uri String):
  Last(Split(uri, '/'))

/*
@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

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

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
        }