import { Injectable } from '@angular/core';
import { Establishment } from '../models/Establishment';
import { Product } from '../models/Product';
import { ProductEstablishment } from '../models/ProductEstablisment';
import { Chain } from '../models/Chain';
import { DBProductEstablishment } from '../models/db/DBProductEstablishment';
import { ComposedDAO } from './ComposedDAO';
import { ProductEstablishmentQueryResult } from '../types/sqlite.type';

@Injectable({
  providedIn: 'root',
})
export class ProductEstablishmentDAO extends ComposedDAO<
  ProductEstablishment,
  DBProductEstablishment,
  ProductEstablishmentQueryResult
> {
  constructor() {
    super(
      'product_establishment',
      `
    SELECT pe.id, pe.product_id, pe.establishment_id, p.barcode, p.image as product_image, p.name as product_name,
    e.address, e.chain_id, c.image as chain_image, c.name as chain_name FROM product_establishment pe 
    JOIN product p ON p.id = pe.product_id 
    JOIN establishment e ON e.id = pe.establishment_id 
    JOIN chain c ON c.id = e.chain_id;`,
      'pe',
    );
  }

  protected override toDB(model: ProductEstablishment): DBProductEstablishment {
    if (!model.product.id) throw new Error('Product id is required');
    if (!model.establishment.id) throw new Error('Establishment id is required');
    return new DBProductEstablishment(model.product.id, model.establishment.id, model.id);
  }

  protected override fromDB(qR: ProductEstablishmentQueryResult): ProductEstablishment {
    const chain = new Chain(qR.chain_name, qR.chain_image, qR.chain_id);
    const establishment = new Establishment(chain, qR.address, qR.establishment_id);
    const product = new Product(qR.barcode, qR.product_name, qR.product_image, qR.product_id);
    return new ProductEstablishment(product, establishment, qR.id);
  }
}