import { toNestErrors, validateFieldsNatively } from '@hookform/resolvers';
import { FieldError } from 'react-hook-form';

import { StructError, validate } from 'superstruct';
import { Resolver } from './types';

const parseErrorSchema = (error: StructError) =>
  error.failures().reduce<Record<string, FieldError>>(
    (previous, error) =>
      (previous[error.path.join('.')] = {
        message: error.message,
        type: error.type,
      }) && previous,
    {},
  );

export const superstructResolver: Resolver =
  (schema, schemaOptions, resolverOptions = {}) =>
  (values, _, options) => {
    const result = validate(values, schema, schemaOptions);

    if (result[0]) {
      return {
        values: {},
        errors: toNestErrors(parseErrorSchema(result[0]), options),
      };
    }

    options.shouldUseNativeValidation && validateFieldsNatively({}, options);

    return {
      values: resolverOptions.raw ? values : result[1],
      errors: {},
    };
  };