export type Schema =
  | ObjectSchema
  | ArraySchema
  | StringSchema
  | NumberSchema
  | IntegerSchema
  | BooleanSchema
  | NullSchema;
// | BaseSchema;

export interface BaseSchema {
  type?: string | undefined;
  $id?: string | undefined;
  id?: string | undefined;
  $schema?: string | undefined;
  $ref?: string | undefined;
  $anchor?: string | undefined;
  $defs?: { [key: string]: BaseSchema } | undefined;
  definitions?: { [key: string]: BaseSchema } | undefined;
  $comment?: string | undefined;
  title?: string | undefined;
  description?: string | undefined;
  default?: unknown | undefined;
  examples?: unknown[] | undefined;
  readOnly?: boolean | undefined;
  writeOnly?: boolean | undefined;
  deprecated?: boolean | undefined;
  allOf?: BaseSchema[] | undefined;
  anyOf?: BaseSchema[] | undefined;
  oneOf?: BaseSchema[] | undefined;
  not?: BaseSchema | undefined;
  if?: BaseSchema | undefined;
  then?: BaseSchema | undefined;
  else?: BaseSchema | undefined;
  enum?: Array<string | number | boolean | null> | undefined;
  const?: string | number | boolean | null | undefined;
  [k: string]: unknown;

  /** A special key used as an intermediate representation of extends-style relationships. Omitted as a $ref with additional properties. */
  // _ref?: BaseSchema;
  _prefault?: unknown | undefined;
}

export interface ObjectSchema extends BaseSchema {
  type: "object";
  properties?: { [key: string]: BaseSchema } | undefined;
  patternProperties?: { [key: string]: BaseSchema } | undefined;
  additionalProperties?: BaseSchema | boolean | undefined;
  required?: string[] | undefined;
  dependentRequired?: { [key: string]: string[] } | undefined;
  propertyNames?: BaseSchema | undefined;
  minProperties?: number | undefined;
  maxProperties?: number | undefined;
  unevaluatedProperties?: BaseSchema | boolean | undefined;
  dependentSchemas?: { [key: string]: BaseSchema } | undefined;
}

export interface ArraySchema extends BaseSchema {
  type: "array";
  items?: BaseSchema | BaseSchema[] | undefined;
  prefixItems?: BaseSchema[] | undefined;
  additionalItems?: BaseSchema | boolean; // (deprecated | undefined)
  contains?: BaseSchema | undefined;
  minItems?: number | undefined;
  maxItems?: number | undefined;
  minContains?: number | undefined;
  maxContains?: number | undefined;
  uniqueItems?: boolean | undefined;
  unevaluatedItems?: BaseSchema | boolean | undefined;
}

export interface StringSchema extends BaseSchema {
  type: "string";
  minLength?: number | undefined;
  maxLength?: number | undefined;
  pattern?: string | undefined;
  format?: string | undefined;
  contentEncoding?: string | undefined;
  contentMediaType?: string | undefined;
}

export interface NumberSchema extends BaseSchema {
  type: "number";
  minimum?: number | undefined;
  maximum?: number | undefined;
  exclusiveMinimum?: number | undefined;
  exclusiveMaximum?: number | undefined;
  multipleOf?: number | undefined;
}

export interface IntegerSchema extends BaseSchema {
  type: "integer";
  minimum?: number | undefined;
  maximum?: number | undefined;
  exclusiveMinimum?: number | undefined;
  exclusiveMaximum?: number | undefined;
  multipleOf?: number | undefined;
}

export interface BooleanSchema extends BaseSchema {
  type: "boolean";
}

export interface NullSchema extends BaseSchema {
  type: "null";
}