{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://nightscout.github.io/schemas/delivery-request.schema.json",
  "title": "DeliveryRequest",
  "description": "Intent to deliver insulin - the command sent to the pump",
  "type": "object",
  "required": ["requestId", "requestType", "requestedBy", "requestedAt"],
  "properties": {
    "requestId": {
      "type": "string",
      "format": "uuid",
      "description": "Unique identifier for this delivery request"
    },
    "requestType": {
      "type": "string",
      "enum": ["tempBasal", "scheduledBasal", "bolus", "microBolus", "suspend", "resume", "cancelTemp"],
      "description": "Type of delivery action requested"
    },
    "parameters": {
      "type": "object",
      "description": "Request parameters (varies by requestType)",
      "properties": {
        "rate": {
          "type": "number",
          "minimum": 0,
          "description": "Rate in U/hr for basal requests"
        },
        "units": {
          "type": "number",
          "minimum": 0,
          "description": "Units for bolus requests"
        },
        "duration": {
          "type": "integer",
          "minimum": 0,
          "description": "Duration in seconds for temp basal"
        },
        "bolusType": {
          "type": "string",
          "enum": ["normal", "square", "dual", "micro"],
          "description": "Type of bolus if applicable"
        }
      }
    },
    "requestedBy": {
      "type": "object",
      "required": ["issuerType", "issuerId"],
      "properties": {
        "issuerType": {
          "type": "string",
          "enum": ["human", "controller", "agent", "caregiver"]
        },
        "issuerId": {
          "type": "string"
        }
      }
    },
    "basedOn": {
      "type": "object",
      "description": "What informed this request",
      "properties": {
        "policyCompositionId": {
          "type": "string",
          "description": "PolicyComposition that was in force"
        },
        "algorithmSuggestion": {
          "type": "object",
          "description": "Algorithm output that led to this request",
          "properties": {
            "suggestedAt": { "type": "string", "format": "date-time" },
            "reason": { "type": "string" },
            "predictedBG": {
              "type": "array",
              "items": { "type": "number" }
            },
            "iob": { "type": "number" },
            "cob": { "type": "number" },
            "eventualBG": { "type": "number" }
          }
        }
      }
    },
    "requestedAt": {
      "type": "string",
      "format": "date-time",
      "description": "When this request was created"
    },
    "expiresAt": {
      "type": "string",
      "format": "date-time",
      "description": "Request is stale/invalid after this time"
    },
    "priority": {
      "type": "string",
      "enum": ["normal", "high", "urgent"],
      "default": "normal",
      "description": "Request priority for queuing"
    }
  }
}