import { HttpException, HttpStatus, Injectable } from '@nestjs/common';
import { CreateKeywordDto } from './dto/create-keyword.dto';
import { UpdateKeywordDto } from './dto/update-keyword.dto';
import { InjectRepository } from '@nestjs/typeorm';
import { Keyword } from './entities/keyword.entity';
import { Repository } from 'typeorm';

@Injectable()
export class KeywordService {
  constructor(@InjectRepository(Keyword) private keywordRepo: Repository<Keyword>) {}

  create(createKeywordDto: CreateKeywordDto) {
    return 'This action adds a new keyword';
  }

  async findAll() {
    return await this.keywordRepo.find({relations: ['verseKeywords']});
  }

  async findOne(id: number, loadVerses: boolean = false): Promise<Keyword | null> {
    let relations = loadVerses ? ['verses'] : undefined;
    return await this.keywordRepo.findOne({where: {id}, relations});
  }

  async update(id: number, updateKeywordDto: UpdateKeywordDto) {
    const keyword = await this.keywordRepo.findOneById(id);

    if(!keyword)
      throw new HttpException({error: 'کلمه کلیدی پیدا نشد.'}, HttpStatus.NOT_FOUND);

    let {desc, ...obj} = updateKeywordDto;
    obj.descFa = desc?.fa;
    obj.descEn = desc?.en;
    await this.keywordRepo.update(id, obj);
    
    return {error: 0, data: true};
  }

  remove(id: number) {
    return `This action removes a #${id} keyword`;
  }
}