{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/united-rentals/main/json-schema/united-rentals-invoice-schema.json",
  "title": "United Rentals Invoice",
  "description": "Schema representing a United Rentals rental billing invoice.",
  "type": "object",
  "properties": {
    "invoiceId": {
      "type": "string",
      "description": "Invoice identifier"
    },
    "invoiceNumber": {
      "type": "string",
      "description": "Human-readable invoice number"
    },
    "status": {
      "type": "string",
      "enum": ["pending", "paid", "overdue", "disputed"],
      "description": "Invoice payment status"
    },
    "rentalId": {
      "type": "string",
      "description": "Associated rental order identifier"
    },
    "purchaseOrderNumber": {
      "type": "string",
      "description": "Customer purchase order number"
    },
    "issueDate": {
      "type": "string",
      "format": "date",
      "description": "Invoice issue date"
    },
    "dueDate": {
      "type": "string",
      "format": "date",
      "description": "Payment due date"
    },
    "subtotal": {
      "type": "number",
      "format": "double",
      "minimum": 0,
      "description": "Pre-tax subtotal in USD"
    },
    "tax": {
      "type": "number",
      "format": "double",
      "minimum": 0,
      "description": "Tax amount in USD"
    },
    "totalAmount": {
      "type": "number",
      "format": "double",
      "minimum": 0,
      "description": "Total invoice amount including tax in USD"
    },
    "lineItems": {
      "type": "array",
      "description": "Invoice line items",
      "items": {
        "$ref": "#/$defs/InvoiceLineItem"
      }
    }
  },
  "required": ["invoiceId", "invoiceNumber", "status", "issueDate", "dueDate", "totalAmount"],
  "$defs": {
    "InvoiceLineItem": {
      "type": "object",
      "title": "Invoice Line Item",
      "description": "A single billing line item on the invoice",
      "properties": {
        "description": {
          "type": "string",
          "description": "Line item description"
        },
        "quantity": {
          "type": "number",
          "minimum": 0,
          "description": "Quantity (may be fractional for partial days/weeks)"
        },
        "unitPrice": {
          "type": "number",
          "format": "double",
          "minimum": 0,
          "description": "Unit price in USD"
        },
        "amount": {
          "type": "number",
          "format": "double",
          "minimum": 0,
          "description": "Line total in USD"
        }
      },
      "required": ["description", "amount"]
    }
  }
}