import { Inject, Injectable } from '@nestjs/common';
import { Repository } from 'typeorm';
import { Document } from './document.entity';
import { TokenService } from 'src/modules/utility/services/token.service';
import { marked } from 'marked';

@Injectable()
export class DocumentService {
  constructor(
    @Inject('DOCUMENT_CACHE')
    private documentStorage: string,
    @Inject('DOCUMENT_REPOSITORY')
    private documentRepository: Repository<Document>,
    private tokenService: TokenService,
  ) {}

  public slugify(text: string): string {
    return text
      .toString()
      .normalize('NFD') // split an accented letter in the base letter and the accent
      .replace(/[\u0300-\u036f]/g, '') // remove all previously split accents
      .toLowerCase()
      .trim()
      .replace(/\s+/g, '-')
      .replace(/[^\w\-]+/g, '')
      .replace(/\-\-+/g, '-');
  }

  public async render(input: string): Promise<string> {
    return new Promise((resolve, reject) => {
      marked.parse(input, (err, result) => {
        if (err) {
          return reject(err);
        }

        resolve(result);
      });
    });
  }

  public async getDocumentBySlug(
    slug: string,
  ): Promise<Document & { html: string }> {
    const doc = await this.documentRepository.findOne({ where: { slug } });
    const html = await this.render(doc.body);
    return {
      ...doc,
      html,
    };
  }

  public async getDocumentByID(
    id: number,
  ): Promise<Document & { html: string }> {
    const doc = await this.documentRepository.findOne({ where: { id } });
    const html = await this.render(doc.body);
    return {
      ...doc,
      html,
    };
  }
}