{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://nightscout.github.io/schemas/profile-selection.schema.json",
  "title": "ProfileSelection",
  "description": "Runtime event indicating which profile is intended to be active",
  "type": "object",
  "required": ["selectionId", "selectedProfileId", "effectiveAt", "selectedBy"],
  "properties": {
    "selectionId": {
      "type": "string",
      "format": "uuid",
      "description": "Unique identifier for this selection event"
    },
    "selectedProfileId": {
      "type": "string",
      "description": "ID of the ProfileDefinition being activated"
    },
    "selectedProfileHash": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$",
      "description": "Content hash of the selected profile for verification"
    },
    "effectiveAt": {
      "type": "string",
      "format": "date-time",
      "description": "When this profile selection takes effect"
    },
    "selectedBy": {
      "type": "object",
      "required": ["issuerType", "issuerId", "authority"],
      "properties": {
        "issuerType": {
          "type": "string",
          "enum": ["human", "controller", "agent", "caregiver"]
        },
        "issuerId": {
          "type": "string"
        },
        "authority": {
          "type": "string",
          "enum": ["primary", "delegated", "automated"],
          "description": "Authority level of the selector"
        }
      }
    },
    "reason": {
      "type": "string",
      "maxLength": 500,
      "description": "Optional annotation explaining why this profile was selected"
    },
    "previousSelectionId": {
      "type": "string",
      "format": "uuid",
      "description": "ID of the selection this replaces, for audit chain"
    }
  }
}