import { useCallback } from 'react';

import { useTranslation } from 'next-i18next';

export const AlertType = {
  WARNING: 'Warning',
  ERROR: 'Error',
} as const;

export type AlertType = typeof AlertType[keyof typeof AlertType];

export const ValidationTarget = {
  FOLDER: 'folder_name',
  PAGE: 'page_name',
  DEFAULT: 'field',
};

export type ValidationTarget = typeof ValidationTarget[keyof typeof ValidationTarget];

export type AlertInfo = {
  type?: AlertType
  message?: string,
  target?: string
}


export type InputValidationResult = {
  type: AlertType
  typeLabel: string,
  message: string,
  target: string
}

export type InputValidator = (input?: string, alertType?: AlertType) => InputValidationResult | void;

export const useInputValidator = (validationTarget: ValidationTarget = ValidationTarget.DEFAULT): InputValidator => {
  const { t } = useTranslation();

  const inputValidator: InputValidator = useCallback((input?, alertType = AlertType.WARNING) => {
    if ((input ?? '').trim() === '') {
      return {
        target: validationTarget,
        type: alertType,
        typeLabel: t(alertType),
        message: t(
          'input_validation.message.field_required',
          { target: t(`input_validation.target.${validationTarget}`) },
        ),
      };
    }

    return;
  }, [t, validationTarget]);

  return inputValidator;
};