import guides from '../content/guides.json';
import formatDate from 'date-fns/format';
import { NextApiRequest } from 'next';
import { AuthorType, findAuthorByUsername } from './author';

export type GuideType = {
  title: string;
  description: string;
  url: string;
  fileName: string;
  isPro: boolean;
  isDraft: boolean;
  createdAt: string;
  updatedAt: string;
  formattedCreatedAt: string;
  formattedUpdatedAt: string;
  authorUsername: string;
  author?: AuthorType;
};

export function getAllGuides(limit: number = 0): GuideType[] {
  return (guides as GuideType[])
    .filter(guide => !guide.isDraft)
    .sort((a, b) => (new Date(b.updatedAt) as any) - (new Date(a.updatedAt) as any))
    .map(guide => ({
      ...guide,
      formattedCreatedAt: formatDate(new Date(guide.createdAt), 'MMMM d, yyyy'),
      formattedUpdatedAt: formatDate(new Date(guide.updatedAt), 'MMMM d, yyyy')
    }))
    .slice(0, limit ? limit : guides.length);
}


export function getRequestedGuide(req: NextApiRequest): GuideType | undefined {
  const allGuides = getAllGuides();
  const guide = allGuides.find(guide => guide.url === req.url);
  if (!guide) {
    return undefined;
  }

  try {
    return {
      ...guide,
      author: findAuthorByUsername(guide.authorUsername)
    };
  } catch (e) {
    console.log(e);
  }

  return undefined;
}