import type { RouteParamsGeneric } from '#vue-router';

export type Slug = { name: string; id: number };
export type SlugRecord = Record<string, Slug>;

export function parseSlug(slug: string): null | Slug {
  const result = /^(?<name>(?:\w+-)*)(?<id>\d*)$/.exec(slug);
  if (
    result === null ||
    result.groups === undefined ||
    result.groups.id === undefined ||
    result.groups.id.length <= 0
  ) {
    return null;
  }
  const { name, id } = result.groups!;

  return {
    name: name
      .substring(0, name.length - 1)
      .split('-')
      .map((w) => `${w.substring(0, 1).toUpperCase()}${w.substring(1)}`)
      .join(' '),
    id: parseInt(id)
  };
}

export function checkSlug(routeParams: RouteParamsGeneric): null | SlugRecord {
  const slugs = Object.keys(routeParams).filter(
    (k) => k.endsWith('Slug') && typeof routeParams[k] === 'string'
  );

  const parsed = slugs.map((s) => parseSlug(routeParams[s] as string));

  if (parsed.some((s) => s === null)) {
    return null;
  }

  return Object.fromEntries(slugs.map((slugKey, i) => [slugKey, parsed[i]!]));
}