{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/GameServerManagers/LinuxGSM/master/lgsm/data/servers.schema.json",
  "title": "LinuxGSM server metadata",
  "type": "object",
  "required": ["schemaVersion", "servers"],
  "additionalProperties": false,
  "properties": {
    "$schema": { "type": "string" },
    "schemaVersion": { "const": 1 },
    "servers": {
      "type": "object",
      "propertyNames": { "pattern": "^[a-z0-9]+server$" },
      "additionalProperties": { "$ref": "#/$defs/server" }
    }
  },
  "$defs": {
    "server": {
      "type": "object",
      "required": ["ports"],
      "additionalProperties": false,
      "properties": {
        "ports": {
          "type": "array",
          "items": { "$ref": "#/$defs/port" }
        }
      }
    },
    "port": {
      "type": "object",
      "required": ["label", "variable", "default", "protocols"],
      "additionalProperties": false,
      "properties": {
        "label": { "type": "string", "minLength": 1 },
        "variable": { "type": "string", "pattern": "^[a-z0-9]+$" },
        "default": {
          "oneOf": [
            { "type": "integer", "minimum": 1, "maximum": 65535 },
            { "type": "null" }
          ]
        },
        "protocols": {
          "type": "array",
          "minItems": 1,
          "uniqueItems": true,
          "items": { "enum": ["tcp", "udp"] }
        },
        "note": { "type": "string", "minLength": 1 }
      }
    }
  }
}