import { Injectable } from '@nestjs/common';
import { DataSource, Repository } from 'typeorm';
import { Merchant } from './entities/merchant.entity';
import { UpdateMerchantDto } from './dto/update-merchant.dto';

@Injectable()
export class MerchantDataService {
  private merchants: Repository<Merchant>;

  public constructor(private dataSource: DataSource) {
    this.merchants = this.dataSource.getRepository(Merchant);
  }

  public async getAll(): Promise<Merchant[]> {
    return await this.merchants.find();
  }

  public async getById(id: string): Promise<Merchant | null> {
    return await this.merchants.findOneBy({ id });
  }

  public async create(name: string): Promise<Merchant> {
    return await this.merchants.save({ name });
  }

  public async update(merchant: UpdateMerchantDto): Promise<Merchant> {
    return await this.merchants.save(merchant);
  }

  public async delete(id: string): Promise<void> {
    await this.merchants.delete({ id });
  }
}