import { germanArticle } from "../interfaces/iLandingpageWordingVariant";

export const invisibleCharacter = "\u200B";

export const isNullOrWhiteSpace = (str?: string) =>
  str === null ||
  str === invisibleCharacter ||
  str?.toString().match(/^ *$/) !== null;

export const getVariableNameAsStringFunc = (varObj: object) =>
  Object.keys(varObj)[0];

export function mergeClassNames(...classes: string[]) {
  return classes.filter(Boolean).join(" ");
}

export function firstLetterToUpper(word: string) {
  if (!word) return word;

  return word[0].toUpperCase() + word.substring(1).toLowerCase();
}

export function getIndefiniteArticles(
  article: germanArticle,
  firstLetterUpper: boolean = false
) {
  const map = {
    der: "ein",
    die: "eine",
    das: "ein",
  };

  const indefiniteArticle = map[article];

  return firstLetterUpper
    ? firstLetterToUpper(indefiniteArticle)
    : indefiniteArticle;
}

export function getPronoun(
  article: germanArticle,
  firstLetterUpper: boolean = false
) {
  const map = {
    der: "unser",
    die: "unsere",
    das: "unser",
  };

  const indefiniteArticle = map[article];

  return firstLetterUpper
    ? firstLetterToUpper(indefiniteArticle)
    : indefiniteArticle;
}

export function getDativeArticle(
  article: germanArticle,
  firstLetterUpper: boolean = false
) {
  const map = {
    der: "dem",
    die: "der",
    das: "des",
  };

  const indefiniteArticle = map[article];

  return firstLetterUpper
    ? firstLetterToUpper(indefiniteArticle)
    : indefiniteArticle;
}

export function getCheckedClassName(
  checked: boolean,
  baseClassName: string,
  selectedClassName: string,
  defaultClassName: string
) {
  if (checked) {
    return mergeClassNames(baseClassName, selectedClassName);
  } else {
    return mergeClassNames(baseClassName, defaultClassName);
  }
}

export function removeLeadingAndTrailingSlashes(
  str: string | undefined | null
): string {
  if (typeof str !== "string") {
    return "";
  }

  return str.replace(/^\/+|\/+$/g, "");
}