import * as Ajv from 'ajv';
import type { DefinedError, ErrorObject } from 'ajv';
import { FieldValues, ResolverOptions, ResolverResult } from 'react-hook-form';

export type Resolver = <T>(
  schema: Ajv.JSONSchemaType<T>,
  schemaOptions?: Ajv.Options,
  factoryOptions?: { mode?: 'async' | 'sync' },
) => <TFieldValues extends FieldValues, TContext>(
  values: TFieldValues,
  context: TContext | undefined,
  options: ResolverOptions<TFieldValues>,
) => Promise<ResolverResult<TFieldValues>>;

// ajv doesn't export any types for errors with `keyword='errorMessage'`
type ErrorMessage = ErrorObject<
  'errorMessage',
  { errors: (DefinedError & { emUsed: boolean })[] }
>;
export type AjvError = ErrorMessage | DefinedError;