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{ Data, Effect, Schema } from \"effect\";\n\nconst NonEmptyStringSchema = Schema.String.pipe(Schema.nonEmptyString());\n\nconst isIsoDateString = (value: string): boolean => {\n  const match = /^(\\d{4})-(\\d{2})-(\\d{2})$/.exec(value);\n  if (!match) {\n    return false;\n  }\n\n  const [, year, month, day] = match;\n  const parsed = new Date(`${value}T00:00:00.000Z`);\n  return (\n    parsed.getUTCFullYear() === Number(year) &&\n    parsed.getUTCMonth() + 1 === Number(month) &&\n    parsed.getUTCDate() === Number(day)\n  );\n};\n\nconst IsoDateStringSchema = Schema.String.pipe(\n  Schema.filter(\n    (value) => isIsoDateString(value) || \"must be a valid ISO date string\"\n  )\n);\n\nconst UnitsSchema = Schema.Number.pipe(Schema.int(), Schema.positive());\nconst NpiSchema = Schema.String.pipe(Schema.pattern(/^\\d{10}$/));\nconst TinSchema = Schema.String.pipe(Schema.pattern(/^\\d{2}-\\d{7}$/));\n\nexport const SupportingInfoSchema = Schema.Struct({\n  id: NonEmptyStringSchema,\n  value: NonEmptyStringSchema,\n  source: Schema.Literal(\"chart\", \"patient\", \"payer\", \"external\")\n});\n\nexport type SupportingInfo = typeof SupportingInfoSchema.Type;\n\nexport const SupportingInfoListSchema = Schema.Array(SupportingInfoSchema);\n\nexport const decodeSupportingInfoList = (\n  input: unknown\n): Effect.Effect<ReadonlyArray<SupportingInfo>, ProtocolError> =>\n  Effect.suspend(() =>\n    Schema.decodeUnknown(SupportingInfoListSchema)(input).pipe(\n      Effect.mapError(\n        (detail) =>\n          new ProtocolError({\n            kind: \"validation\",\n            reason: \"invalid-evidence\",\n            detail\n          })\n      )\n    )\n  ).pipe(\n    Effect.catchAllDefect((detail) =>\n      Effect.fail(\n        new ProtocolError({\n          kind: \"validation\",\n          reason: \"invalid-evidence\",\n          detail\n        })\n      )\n    )\n  );\n\nexport const DocumentationRequirementSchema = Schema.Struct({\n  id: NonEmptyStringSchema,\n  description: NonEmptyStringSchema,\n  questionnaire: NonEmptyStringSchema\n});\n\nexport type DocumentationRequirement =\n  typeof DocumentationRequirementSchema.Type;\n\nexport const AuthorizationRequestSchema = Schema.Struct({\n  patient: Schema.Struct({\n    memberId: NonEmptyStringSchema,\n    dob: IsoDateStringSchema\n  }),\n  provider: Schema.Struct({\n    npi: NpiSchema,\n    tin: TinSchema\n  }),\n  service: Schema.Struct({\n    code: NonEmptyStringSchema,\n    codeSystem: NonEmptyStringSchema,\n    diagnosis: Schema.Array(NonEmptyStringSchema),\n    placeOfService: NonEmptyStringSchema,\n    requestedStart: IsoDateStringSchema,\n    units: UnitsSchema,\n    urgency: Schema.Literal(\"standard\", \"expedited\")\n  }),\n  supportingInfo: Schema.Array(SupportingInfoSchema)\n});\n\nexport type AuthorizationRequest = typeof AuthorizationRequestSchema.Type;\n\nexport type ProtocolErrorKind =\n  | \"validation\"\n  | \"transport\"\n  | \"workflow\"\n  | \"payer\";\n\nexport type ProtocolErrorReason =\n  | \"invalid-request\"\n  | \"invalid-evidence\"\n  | \"invalid-determination\"\n  | \"invalid-terminal-determination\"\n  | \"invalid-resume-token\"\n  | \"invalid-subscription-event\"\n  | \"unknown-subscription\"\n  | \"subscription-timeout\"\n  | \"evidence-required\"\n  | \"evidence-missing-requirements\"\n  | \"evidence-collection-failed\"\n  | \"max-steps-exceeded\"\n  | \"policy-evaluation-failed\"\n  | \"policy-review-failed\"\n  | \"http-error\"\n  | \"http-timeout\"\n  | \"http-request-failed\"\n  | \"missing-base-url\"\n  | \"smart-auth-configuration-invalid\"\n  | \"smart-configuration-failed\"\n  | \"smart-token-request-failed\"\n  | \"smart-token-response-invalid\"\n  | \"transport-authorize-failed\"\n  | \"transport-resume-failed\"\n  | \"transport-await-failed\"\n  | \"transport-audit-failed\"\n  | \"transport-verify-failed\"\n  | \"transport-capabilities-failed\"\n  | (string & {});\n\n/**\n * Structured protocol failure raised by the SDK and Effect services.\n *\n * @example\n * try {\n *   await client.request(request);\n * } catch (error) {\n *   if (error instanceof ProtocolError && error.kind === \"validation\") {\n *     console.error(error.reason, error.detail);\n *   }\n * }\n */\nexport class ProtocolError extends Data.TaggedError(\"ProtocolError\")<{\n  readonly reason: ProtocolErrorReason;\n  readonly kind?: ProtocolErrorKind;\n  readonly detail?: unknown;\n  readonly requestId?: string;\n}> {\n  override get message(): string {\n    const kind = this.kind ? `${this.kind}: ` : \"\";\n    return `${kind}${this.reason}`;\n  }\n}\n\nexport const decodeAuthorizationRequest = (\n  input: unknown\n): Effect.Effect<AuthorizationRequest, ProtocolError> =>\n  Effect.suspend(() =>\n    Schema.decodeUnknown(AuthorizationRequestSchema)(input).pipe(\n      Effect.mapError(\n        (detail) =>\n          new ProtocolError({\n            kind: \"validation\",\n            reason: \"invalid-request\",\n            detail\n          })\n      )\n    )\n  ).pipe(\n    Effect.catchAllDefect((detail) =>\n      Effect.fail(\n        new ProtocolError({\n          kind: \"validation\",\n          reason: \"invalid-request\",\n          detail\n        })\n      )\n    )\n  );\n\nexport type DeterminationStatus =\n  | \"approved\"\n  | \"denied\"\n  | \"info-needed\"\n  | \"pended\"\n  | \"error\";\n\nexport type NextAction =\n  | \"none\"\n  | \"attach-evidence\"\n  | \"await-payer\"\n  | \"appeal\"\n  | \"contact-payer\";\n\nexport type PendingReason =\n  | \"human-review\"\n  | \"payer-processing\"\n  | \"external-records\";\n\nexport type DeterminationBy = \"rules\" | \"clinical-reviewer\" | null;\n\nexport interface SignatureReceipt {\n  readonly alg: \"EdDSA\";\n  readonly format: \"detached-json\";\n  readonly keyId: string;\n  readonly issuedAt: string;\n  readonly requestHash: string;\n  readonly payloadHash: string;\n  readonly nonce: string;\n  readonly signature: string;\n}\n\nexport interface X278Capabilities {\n  readonly protocol: \"x278\";\n  readonly implementation: string;\n  readonly endpoints: {\n    readonly authorize: string;\n    readonly resume: string;\n    readonly awaitDetermination: string;\n    readonly auditLog?: string;\n    readonly verify?: string;\n  };\n  readonly signing?: {\n    readonly alg: SignatureReceipt[\"alg\"];\n    readonly publicKeyPem?: string;\n  };\n}\n\nexport const SignatureReceiptSchema = Schema.Struct({\n  alg: Schema.Literal(\"EdDSA\"),\n  format: Schema.Literal(\"detached-json\"),\n  keyId: Schema.String,\n  issuedAt: Schema.String,\n  requestHash: Schema.String,\n  payloadHash: Schema.String,\n  nonce: Schema.String,\n  signature: Schema.String\n});\n\nexport interface DeterminationBase {\n  readonly authId: string;\n  readonly status: DeterminationStatus;\n  readonly nextAction: NextAction;\n  readonly ruleSetVersion: string;\n  readonly expiresAt: string | null;\n  readonly determinationBy: DeterminationBy;\n}\n\nexport interface ApprovedDetermination extends DeterminationBase {\n  readonly status: \"approved\";\n  readonly nextAction: \"none\";\n  readonly authNumber: string;\n  readonly approvedUnits: number;\n  readonly validFrom: string;\n  readonly validThrough: string;\n  readonly determinationBy: \"rules\" | \"clinical-reviewer\";\n  readonly signature: SignatureReceipt;\n}\n\nexport const ApprovedDeterminationSchema = Schema.Struct({\n  authId: Schema.String,\n  status: Schema.Literal(\"approved\"),\n  nextAction: Schema.Literal(\"none\"),\n  ruleSetVersion: Schema.String,\n  expiresAt: Schema.NullOr(Schema.String),\n  determinationBy: Schema.Literal(\"rules\", \"clinical-reviewer\"),\n  authNumber: Schema.String,\n  approvedUnits: UnitsSchema,\n  validFrom: IsoDateStringSchema,\n  validThrough: IsoDateStringSchema,\n  signature: SignatureReceiptSchema\n});\n\nexport type UnsignedApprovedDetermination = Omit<\n  ApprovedDetermination,\n  \"signature\"\n>;\n\nexport interface DeniedDetermination extends DeterminationBase {\n  readonly status: \"denied\";\n  readonly nextAction: \"appeal\";\n  readonly reasonCode: string;\n  readonly reasonText: string;\n  readonly appealPath: string;\n  readonly determinationBy: \"rules\" | \"clinical-reviewer\";\n  readonly signature: SignatureReceipt;\n}\n\nexport const DeniedDeterminationSchema = Schema.Struct({\n  authId: Schema.String,\n  status: Schema.Literal(\"denied\"),\n  nextAction: Schema.Literal(\"appeal\"),\n  ruleSetVersion: Schema.String,\n  expiresAt: Schema.NullOr(Schema.String),\n  determinationBy: Schema.Literal(\"rules\", \"clinical-reviewer\"),\n  reasonCode: Schema.String,\n  reasonText: Schema.String,\n  appealPath: Schema.String,\n  signature: SignatureReceiptSchema\n});\n\nexport type UnsignedDeniedDetermination = Omit<DeniedDetermination, \"signature\">;\n\nexport type UnsignedTerminalDetermination =\n  | UnsignedApprovedDetermination\n  | UnsignedDeniedDetermination;\n\nexport interface InfoNeededDetermination extends DeterminationBase {\n  readonly status: \"info-needed\";\n  readonly nextAction: \"attach-evidence\";\n  readonly documentationRequired: ReadonlyArray<DocumentationRequirement>;\n  readonly resumeToken: string;\n  readonly determinationBy: null;\n}\n\nexport const InfoNeededDeterminationSchema = Schema.Struct({\n  authId: Schema.String,\n  status: Schema.Literal(\"info-needed\"),\n  nextAction: Schema.Literal(\"attach-evidence\"),\n  ruleSetVersion: Schema.String,\n  expiresAt: Schema.NullOr(Schema.String),\n  determinationBy: Schema.Null,\n  documentationRequired: Schema.Array(DocumentationRequirementSchema),\n  resumeToken: Schema.String\n});\n\nexport interface PendedDetermination extends DeterminationBase {\n  readonly status: \"pended\";\n  readonly nextAction: \"await-payer\";\n  readonly pendingReason: PendingReason;\n  readonly subscription: string;\n  readonly determinationBy: \"clinical-reviewer\" | null;\n}\n\nexport const PendedDeterminationSchema = Schema.Struct({\n  authId: Schema.String,\n  status: Schema.Literal(\"pended\"),\n  nextAction: Schema.Literal(\"await-payer\"),\n  ruleSetVersion: Schema.String,\n  expiresAt: Schema.NullOr(Schema.String),\n  determinationBy: Schema.NullOr(Schema.Literal(\"clinical-reviewer\")),\n  pendingReason: Schema.Literal(\n    \"human-review\",\n    \"payer-processing\",\n    \"external-records\"\n  ),\n  subscription: Schema.String\n});\n\nexport interface ErrorDetermination extends DeterminationBase {\n  readonly status: \"error\";\n  readonly nextAction: \"contact-payer\";\n  readonly reasonCode: string;\n  readonly reasonText: string;\n  readonly determinationBy: null;\n}\n\nexport const ErrorDeterminationSchema = Schema.Struct({\n  authId: Schema.String,\n  status: Schema.Literal(\"error\"),\n  nextAction: Schema.Literal(\"contact-payer\"),\n  ruleSetVersion: Schema.String,\n  expiresAt: Schema.NullOr(Schema.String),\n  determinationBy: Schema.Null,\n  reasonCode: Schema.String,\n  reasonText: Schema.String\n});\n\nexport type TerminalDetermination =\n  | ApprovedDetermination\n  | DeniedDetermination;\n\nexport type NonTerminalDetermination =\n  | InfoNeededDetermination\n  | PendedDetermination;\n\nexport type Determination =\n  | TerminalDetermination\n  | NonTerminalDetermination\n  | ErrorDetermination;\n\nexport const TerminalDeterminationSchema = Schema.Union(\n  ApprovedDeterminationSchema,\n  DeniedDeterminationSchema\n);\n\nexport const DeterminationSchema = Schema.Union(\n  ApprovedDeterminationSchema,\n  DeniedDeterminationSchema,\n  InfoNeededDeterminationSchema,\n  PendedDeterminationSchema,\n  ErrorDeterminationSchema\n);\n\nexport const decodeDetermination = (\n  input: unknown\n): Effect.Effect<Determination, ProtocolError> =>\n  Effect.suspend(() =>\n    Schema.decodeUnknown(DeterminationSchema)(input).pipe(\n      Effect.mapError(\n        (detail) =>\n          new ProtocolError({\n            kind: \"validation\",\n            reason: \"invalid-determination\",\n            detail\n          })\n      )\n    )\n  ).pipe(\n    Effect.catchAllDefect((detail) =>\n      Effect.fail(\n        new ProtocolError({\n          kind: \"validation\",\n          reason: \"invalid-determination\",\n          detail\n        })\n      )\n    )\n  );\n\nexport const decodeTerminalDetermination = (\n  input: unknown\n): Effect.Effect<TerminalDetermination, ProtocolError> =>\n  Effect.suspend(() =>\n    Schema.decodeUnknown(TerminalDeterminationSchema)(input).pipe(\n      Effect.mapError(\n        (detail) =>\n          new ProtocolError({\n            kind: \"validation\",\n            reason: \"invalid-terminal-determination\",\n            detail\n          })\n      )\n    )\n  ).pipe(\n    Effect.catchAllDefect((detail) =>\n      Effect.fail(\n        new ProtocolError({\n          kind: \"validation\",\n          reason: \"invalid-terminal-determination\",\n          detail\n        })\n      )\n    )\n  );\n\nexport interface AuditRecord {\n  readonly authId: string;\n  readonly status: TerminalDetermination[\"status\"];\n  readonly requestHash: string;\n  readonly determinationHash: string;\n  readonly signatureKeyId: string;\n  readonly appendedAt: string;\n}\n","import { Effect } from \"effect\";\nimport type {\n  AuthorizationRequest,\n  DocumentationRequirement,\n  InfoNeededDetermination,\n  PendedDetermination,\n  UnsignedApprovedDetermination,\n  UnsignedTerminalDetermination\n} from \"./domain.js\";\nimport { ProtocolError } from \"./domain.js\";\n\nexport type X278PolicyDecision =\n  | UnsignedTerminalDetermination\n  | InfoNeededDetermination\n  | PendedDetermination;\n\nexport interface X278PolicyEvaluationContext {\n  readonly authId: string;\n  readonly ruleSetVersion: string;\n  readonly now: Date;\n  readonly authNumber: (authId: string) => string;\n  readonly addDays: (date: string, days: number) => string;\n  readonly daysFromNow: (days: number) => string;\n  readonly questionnaireUrl: (id: string) => string;\n  readonly createResumeToken: () => string;\n  readonly createSubscription: (authId: string) => string;\n}\n\nexport interface X278PolicyReviewContext extends X278PolicyEvaluationContext {\n  readonly subscription: string;\n}\n\nexport interface X278PolicyAdapter {\n  readonly ruleSetVersion: string;\n  readonly evaluate: (\n    request: AuthorizationRequest,\n    context: X278PolicyEvaluationContext\n  ) =>\n    | X278PolicyDecision\n    | Promise<X278PolicyDecision>\n    | Effect.Effect<X278PolicyDecision, ProtocolError>;\n  readonly review?: (\n    request: AuthorizationRequest,\n    context: X278PolicyReviewContext\n  ) =>\n    | UnsignedTerminalDetermination\n    | Promise<UnsignedTerminalDetermination>\n    | Effect.Effect<UnsignedTerminalDetermination, ProtocolError>;\n}\n\nconst defaultRuleSetVersion = \"backwork/reference-medical-policy@2026.1\";\n\nconst daysFrom = (base: Date, days: number): string =>\n  new Date(base.getTime() + days * 24 * 60 * 60 * 1000).toISOString();\n\nconst addDays = (date: string, days: number): string => {\n  const parsed = new Date(`${date}T00:00:00.000Z`);\n  parsed.setUTCDate(parsed.getUTCDate() + days);\n  return parsed.toISOString().slice(0, 10);\n};\n\nconst defaultAuthNumber = (authId: string): string =>\n  `BW-${authId.slice(0, 8).toUpperCase()}`;\n\nconst defaultQuestionnaireUrl = (id: string): string =>\n  `https://backwork.example/fhir/Questionnaire/${id}`;\n\nconst referenceRequirements: ReadonlyArray<DocumentationRequirement> = [\n  {\n    id: \"conservative-tx-6wk\",\n    description: \"Evidence of at least six weeks of conservative treatment\",\n    questionnaire: defaultQuestionnaireUrl(\"conservative-tx-6wk\")\n  },\n  {\n    id: \"weight-bearing-xray\",\n    description: \"Recent weight-bearing knee x-ray report\",\n    questionnaire: defaultQuestionnaireUrl(\"weight-bearing-xray\")\n  }\n];\n\nconst missingRequirements = (\n  request: AuthorizationRequest,\n  requirements: ReadonlyArray<DocumentationRequirement>\n): ReadonlyArray<DocumentationRequirement> => {\n  const supplied = new Set(request.supportingInfo.map((item) => item.id));\n  return requirements.filter((requirement) => !supplied.has(requirement.id));\n};\n\nconst base = (authId: string, ruleSetVersion: string) => ({\n  authId,\n  ruleSetVersion,\n  expiresAt: null\n});\n\nexport const createPolicyEvaluationContext = (\n  authId: string,\n  ruleSetVersion: string,\n  now: Date = new Date()\n): X278PolicyEvaluationContext => ({\n  authId,\n  ruleSetVersion,\n  now,\n  authNumber: defaultAuthNumber,\n  addDays,\n  daysFromNow: (days) => daysFrom(now, days),\n  questionnaireUrl: defaultQuestionnaireUrl,\n  createResumeToken: () => `rt_${crypto.randomUUID()}`,\n  createSubscription: (id) => `x278://subscription/${id}`\n});\n\nexport const createReferencePolicyAdapter = (\n  ruleSetVersion = defaultRuleSetVersion\n): X278PolicyAdapter => ({\n  ruleSetVersion,\n  evaluate: (request, context) => {\n    if (request.service.code === \"99999\") {\n      return {\n        ...base(context.authId, context.ruleSetVersion),\n        status: \"denied\",\n        nextAction: \"appeal\",\n        determinationBy: \"rules\",\n        reasonCode: \"not-covered\",\n        reasonText:\n          \"The requested service is not covered by the reference policy.\",\n        appealPath: \"https://backwork.example/appeals\"\n      };\n    }\n\n    if (request.service.code === \"63650\") {\n      return {\n        ...base(context.authId, context.ruleSetVersion),\n        status: \"pended\",\n        nextAction: \"await-payer\",\n        pendingReason: \"human-review\",\n        subscription: context.createSubscription(context.authId),\n        expiresAt: context.daysFromNow(7),\n        determinationBy: \"clinical-reviewer\"\n      };\n    }\n\n    if (request.service.code === \"27447\") {\n      const missing = missingRequirements(request, referenceRequirements);\n      if (missing.length > 0) {\n        return {\n          ...base(context.authId, context.ruleSetVersion),\n          status: \"info-needed\",\n          nextAction: \"attach-evidence\",\n          documentationRequired: missing,\n          resumeToken: context.createResumeToken(),\n          expiresAt: context.daysFromNow(7),\n          determinationBy: null\n        };\n      }\n    }\n\n    return {\n      ...base(context.authId, context.ruleSetVersion),\n      status: \"approved\",\n      nextAction: \"none\",\n      authNumber: context.authNumber(context.authId),\n      approvedUnits: request.service.units,\n      validFrom: request.service.requestedStart,\n      validThrough: context.addDays(request.service.requestedStart, 90),\n      determinationBy: \"rules\"\n    };\n  },\n  review: (request, context): UnsignedApprovedDetermination => ({\n    ...base(context.authId, context.ruleSetVersion),\n    status: \"approved\",\n    nextAction: \"none\",\n    authNumber: context.authNumber(context.authId),\n    approvedUnits: request.service.units,\n    validFrom: request.service.requestedStart,\n    validThrough: context.addDays(request.service.requestedStart, 90),\n    determinationBy: \"clinical-reviewer\"\n  })\n});\n\nexport const resolvePolicyDecision = <A>(\n  result: A | Promise<A> | Effect.Effect<A, ProtocolError>,\n  reason: \"policy-evaluation-failed\" | \"policy-review-failed\"\n): Effect.Effect<A, ProtocolError> => {\n  if (Effect.isEffect(result)) {\n    return result;\n  }\n\n  if (result instanceof Promise) {\n    return Effect.tryPromise({\n      try: () => result,\n      catch: (detail) =>\n        detail instanceof ProtocolError\n          ? detail\n          : new ProtocolError({ kind: \"payer\", reason, detail })\n    });\n  }\n\n  return Effect.succeed(result);\n};\n"]}