/*
  Preventive care reminders — non-interruptive patient-view rule.

  v0.1 reminders (hand-curated codes; upgrade path is the ValueSet layer):
    Colorectal cancer screening due — age 45–75, no colonoscopy in the last
    10 years and no stool-based screening (FIT/FOBT) in the last year.
    Influenza vaccination due — adult with no influenza vaccine in the last
    12 months (rolling season approximation; no fixed season anchor).
*/
library AtriusPreventiveCare version '0.1.0'

using FHIR version '4.0.1'
using AtriusIn version '0.1.0'

include FHIRHelpers version '4.4.000' called FHIRHelpers
include AtriusCommon version '0.1.0'

codesystem "LOINC": 'http://loinc.org'
codesystem "SNOMEDCT": 'http://snomed.info/sct'
codesystem "CVX": 'http://hl7.org/fhir/sid/cvx'

code "Colonoscopy": '73761001' from "SNOMEDCT" display 'Colonoscopy'
code "FIT": '29771-3' from "LOINC" display 'Hemoglobin.gastrointestinal.lower [Presence] in Stool by Immunoassay'
code "FOBT": '2335-8' from "LOINC" display 'Hemoglobin.gastrointestinal [Presence] in Stool'

code "Influenza unspecified": '88' from "CVX" display 'influenza virus vaccine, unspecified formulation'
code "Influenza IIV4 injectable": '150' from "CVX" display 'influenza, injectable, quadrivalent, preservative free'
code "Influenza IIV4": '158' from "CVX" display 'influenza, injectable, quadrivalent'
code "Influenza IIV3": '140' from "CVX" display 'Influenza, seasonal, injectable, preservative free'
code "Influenza IIV3 injectable": '141' from "CVX" display 'Influenza, seasonal, injectable'
code "Influenza LAIV4": '149' from "CVX" display 'influenza, live, intranasal, quadrivalent'
code "Influenza ccIIV4": '171' from "CVX" display 'Influenza, injectable, MDCK, preservative free, quadrivalent'
code "Influenza RIV4": '185' from "CVX" display 'Seasonal, quadrivalent, recombinant, injectable influenza vaccine, preservative free'

context Patient

define "Influenza Vaccine Codes":
  {
    "Influenza unspecified",
    "Influenza IIV4 injectable",
    "Influenza IIV4",
    "Influenza IIV3",
    "Influenza IIV3 injectable",
    "Influenza LAIV4",
    "Influenza ccIIV4",
    "Influenza RIV4"
  }

define "In Colorectal Screening Age Range":
  AgeInYearsAt(Today()) between 45 and 75

define "Colonoscopy In Last 10 Years":
  exists (
    [Procedure: "Colonoscopy"] P
      where P.status = 'completed'
        and end of P.performed.toPerformedInterval() on or after (Today() - 10 years)
  )

define "Stool Based Screening In Last Year":
  exists (
    [Observation] O
      where O.status in { 'final', 'amended', 'corrected' }
        and (O.code ~ "FIT" or O.code ~ "FOBT")
        and end of O.effective.toObservationEffectiveInterval() on or after (Today() - 1 year)
  )

define "Colorectal Screening Due":
  "In Colorectal Screening Age Range"
    and not "Colonoscopy In Last 10 Years"
    and not "Stool Based Screening In Last Year"

define "Influenza Immunizations In Last Year":
  [Immunization] I
    where I.status = 'completed'
      and exists ("Influenza Vaccine Codes" C where I.vaccineCode ~ C)
      and I.occurrence is FHIR.dateTime
      and FHIRHelpers.ToDateTime(I.occurrence as FHIR.dateTime) on or after (Today() - 1 year)

define "Influenza Vaccine In Last Year":
  exists "Influenza Immunizations In Last Year"

define "Influenza Vaccine Due":
  AgeInYearsAt(Today()) >= 18
    and not "Influenza Vaccine In Last Year"

define "Preventive Care Reminder Needed":
  "Colorectal Screening Due"
    or "Influenza Vaccine Due"

Encoded data