import type { Options, ErrorObject } from 'ajv';
import type Ajv from 'ajv';
import type { FormatsPluginOptions } from 'ajv-formats';

/** The type describing the value for the `suppressDuplicateFiltering` option */
export type SuppressDuplicateFilteringType = 'anyOf' | 'oneOf' | 'all' | 'none';

/** The type describing how to customize the AJV6 validator
 */
export interface CustomValidatorOptionsType {
  /** The list of additional meta schemas that the validator can access */
  additionalMetaSchemas?: readonly object[];
  /** The set of additional custom formats that the validator will support */
  customFormats?: Record<string, string | RegExp | ((data: string) => boolean)>;
  /** The set of config overrides that will be passed to the AJV validator constructor on top of the defaults */
  ajvOptionsOverrides?: Options;
  /** The `ajv-format` options to use when adding formats to `ajv`; pass `false` to disable it */
  ajvFormatOptions?: FormatsPluginOptions | false;
  /** The AJV class to construct */
  AjvClass?: typeof Ajv;
  /** A function to call to extend AJV, such as `ajvErrors()` */
  extenderFn?: (ajv: Ajv) => Ajv;
  /** When set, suppresses duplicate error filtering for the specified keyword(s):
   * - `'none'` (default): both `anyOf` and `oneOf` duplicate errors are filtered
   * - `'all'`: disables all duplicate filtering
   * - `'anyOf'`: disables filtering for `anyOf` errors only (oneOf duplicates are still filtered)
   * - `'oneOf'`: disables filtering for `oneOf` errors only (anyOf duplicates are still filtered)
   */
  suppressDuplicateFiltering?: SuppressDuplicateFilteringType;
}

/** The type describing a function that takes a list of Ajv `ErrorObject`s and localizes them
 */
export type Localizer = (errors?: null | ErrorObject[]) => void;

/** This is a simplification of the `ValidateFunction` type provided by the AJV validator down to its minimal form so
 * that the code still works properly with precompiled validator functions generated by the AJV standalone code
 * compilation but does not rely on any of the internal AJV types which causes Typescript issue for library consumers
 */
export interface CompiledValidateFunction {
  /** The errors produced by the precompiled validator */
  errors?: null | ErrorObject[];
  /** This is simplified version of a `ValidateFunction` type definition which describes the interface that our
   * precompiled validator will call.
   */
  (this: Ajv | any, data: any): boolean;
}

/** The definition of precompiled validator functions
 */
export type ValidatorFunctions = Record<string, CompiledValidateFunction>;