{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/octane/main/json-schema/octane-meter-schema.json",
  "title": "Meter",
  "description": "A usage meter that tracks events and aggregates data for billing purposes in Octane.",
  "type": "object",
  "required": ["name", "event_name", "meter_type", "data_type", "aggregation", "is_incremental", "reporting_method"],
  "properties": {
    "name": {
      "type": "string",
      "description": "Unique identifier name for the meter."
    },
    "display_name": {
      "type": "string",
      "description": "Human-readable display name for the meter."
    },
    "description": {
      "type": "string",
      "description": "Description of what this meter tracks."
    },
    "event_name": {
      "type": "string",
      "description": "The event name this meter listens to."
    },
    "meter_type": {
      "type": "string",
      "description": "Type of meter (e.g., counter, gauge)."
    },
    "data_type": {
      "type": "string",
      "enum": ["INT", "FLOAT", "STRING"],
      "description": "Data type of the measurement value."
    },
    "aggregation": {
      "type": "string",
      "enum": ["SUM", "COUNT", "MAX", "MIN", "UNIQUE_COUNT"],
      "description": "Aggregation method applied to measurements."
    },
    "unit_name": {
      "type": "string",
      "description": "Human-readable unit name (e.g., 'API calls', 'GB')."
    },
    "is_incremental": {
      "type": "boolean",
      "description": "Whether measurements are incremental or absolute."
    },
    "reporting_method": {
      "type": "string",
      "enum": ["periodic", "total"],
      "description": "How usage is reported."
    },
    "expected_labels": {
      "type": "array",
      "items": { "type": "string" },
      "description": "Expected label keys on measurements."
    },
    "primary_labels": {
      "type": "array",
      "items": { "type": "string" },
      "description": "Primary label keys used for grouping."
    },
    "event_label_filter": {
      "type": "object",
      "description": "Filter expression for event labels."
    }
  },
  "additionalProperties": false
}