{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/us-foods/main/json-schema/us-foods-order-schema.json",
  "title": "US Foods Order",
  "description": "Schema for a foodservice distribution order placed through US Foods ordering systems",
  "type": "object",
  "properties": {
    "orderId": {
      "type": "string",
      "description": "Unique identifier for the order"
    },
    "customerId": {
      "type": "string",
      "description": "US Foods customer account number"
    },
    "orderDate": {
      "type": "string",
      "format": "date-time",
      "description": "Date and time the order was placed"
    },
    "deliveryDate": {
      "type": "string",
      "format": "date",
      "description": "Expected delivery date"
    },
    "status": {
      "type": "string",
      "description": "Current order status",
      "enum": [
        "draft",
        "submitted",
        "confirmed",
        "picking",
        "loaded",
        "in-transit",
        "delivered",
        "invoiced",
        "cancelled"
      ]
    },
    "distributionCenter": {
      "type": "string",
      "description": "US Foods distribution center fulfilling the order"
    },
    "items": {
      "type": "array",
      "description": "Line items in the order",
      "items": {
        "$ref": "#/$defs/OrderItem"
      }
    },
    "totalItems": {
      "type": "integer",
      "description": "Total number of line items"
    },
    "totalCases": {
      "type": "number",
      "description": "Total number of cases ordered"
    },
    "purchaseOrderNumber": {
      "type": "string",
      "description": "Customer's internal purchase order number"
    },
    "notes": {
      "type": "string",
      "description": "Special delivery instructions or order notes"
    }
  },
  "required": ["orderId", "customerId", "orderDate", "items"],
  "$defs": {
    "OrderItem": {
      "type": "object",
      "description": "A single product line item in a US Foods order",
      "properties": {
        "lineNumber": {
          "type": "integer",
          "description": "Line number within the order"
        },
        "itemNumber": {
          "type": "string",
          "description": "US Foods product item number"
        },
        "gtin": {
          "type": "string",
          "description": "Global Trade Item Number (GS1 standard)"
        },
        "description": {
          "type": "string",
          "description": "Product description"
        },
        "brand": {
          "type": "string",
          "description": "Product brand name"
        },
        "packSize": {
          "type": "string",
          "description": "Pack size specification (e.g., 4/1 GAL, 6/10 CAN)"
        },
        "quantityOrdered": {
          "type": "number",
          "description": "Number of cases ordered"
        },
        "unitPrice": {
          "type": "number",
          "description": "Price per case"
        },
        "extendedPrice": {
          "type": "number",
          "description": "Total price for this line item"
        },
        "unitOfMeasure": {
          "type": "string",
          "description": "Unit of measure (CS = Case, EA = Each)"
        },
        "allergens": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "List of allergens present in the product"
        },
        "isSubstitute": {
          "type": "boolean",
          "description": "Whether this item was substituted for a requested out-of-stock item"
        }
      },
      "required": ["itemNumber", "description", "quantityOrdered"]
    }
  }
}