{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "jev-compat-v1/request.schema.json",
  "title": "JEV systemone request (jev-compat-v1)",
  "type": "object",
  "required": ["model", "state", "questions"],
  "additionalProperties": false,
  "properties": {
    "model": {"type": "string", "minLength": 1},
    "state": {
      "oneOf": [
        {"type": "string", "minLength": 1},
        {"type": "object", "minProperties": 1},
        {"type": "array", "minItems": 1}
      ]
    },
    "questions": {
      "type": "object",
      "minProperties": 1,
      "additionalProperties": {"$ref": "#/$defs/question"}
    }
  },
  "$defs": {
    "question": {
      "type": "object",
      "required": ["type", "instructions", "criteria"],
      "additionalProperties": false,
      "properties": {
        "type": {"enum": ["choice", "noul", "score"]},
        "instructions": {"type": "string", "minLength": 1},
        "criteria": {}
      },
      "allOf": [
        {
          "if": {"properties": {"type": {"const": "choice"}}},
          "then": {
            "properties": {
              "criteria": {
                "type": "object",
                "minProperties": 2,
                "maxProperties": 16,
                "additionalProperties": {"type": "string", "minLength": 1}
              }
            }
          }
        },
        {
          "if": {"properties": {"type": {"const": "noul"}}},
          "then": {
            "properties": {
              "criteria": {
                "type": "object",
                "required": ["true", "false"],
                "additionalProperties": false,
                "properties": {
                  "true": {"type": "string", "minLength": 1},
                  "false": {"type": "string", "minLength": 1}
                }
              }
            }
          }
        },
        {
          "if": {"properties": {"type": {"const": "score"}}},
          "then": {
            "properties": {
              "criteria": {
                "type": "array",
                "minItems": 2,
                "maxItems": 16,
                "items": {"type": "string", "minLength": 1}
              }
            }
          }
        }
      ]
    }
  }
}