{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.github.io/southwest-gas/json-schema/southwest-gas-usage-schema.json",
  "title": "Southwest Gas Usage Record",
  "description": "Natural gas consumption data for a Southwest Gas customer account, measured in therms or hundred cubic feet (CCF).",
  "type": "object",
  "properties": {
    "accountNumber": {
      "type": "string",
      "description": "The Southwest Gas account number for this usage record."
    },
    "readDate": {
      "type": "string",
      "format": "date",
      "description": "The meter read date for this usage record (YYYY-MM-DD)."
    },
    "usageTherms": {
      "type": "number",
      "description": "Natural gas consumption in therms.",
      "minimum": 0
    },
    "usageCcf": {
      "type": "number",
      "description": "Natural gas consumption in hundred cubic feet (CCF).",
      "minimum": 0
    },
    "readType": {
      "type": "string",
      "enum": ["Actual", "Estimated", "Customer"],
      "description": "Method of meter reading."
    },
    "billingPeriodStart": {
      "type": "string",
      "format": "date",
      "description": "Start date of the billing period."
    },
    "billingPeriodEnd": {
      "type": "string",
      "format": "date",
      "description": "End date of the billing period."
    },
    "gasCharge": {
      "type": "number",
      "description": "Commodity charge for natural gas consumed.",
      "minimum": 0
    },
    "distributionCharge": {
      "type": "number",
      "description": "Distribution service charge for delivering gas to premises.",
      "minimum": 0
    },
    "totalCharge": {
      "type": "number",
      "description": "Total charges for this billing period.",
      "minimum": 0
    },
    "heatingDegreeDays": {
      "type": "integer",
      "description": "Number of heating degree days in the billing period, indicating weather-driven heating demand.",
      "minimum": 0
    }
  },
  "required": ["accountNumber", "readDate", "readType"]
}