import { new_client } from '../db/db_client';
import { Box } from '../types/box';
import { Either, eitherLeft, eitherRight } from '../utils/utils';

type DBBox = {
	id_boite: number;
	titre_boite: string;
	date_boite: string;
};

function db2box(data: DBBox): Box {
	const box: Box = {
		id: data.id_boite,
		title: data.titre_boite,
		date: new Date(data.date_boite),
	};

	return box;
}

const getBox = async (idOrTitle: number | string): Promise<Either<Box, string>> => {
  const client = new_client();
  await client.connect();
  let res;
  if (typeof idOrTitle !== 'number') {
    res = await client.query("SELECT * FROM boites WHERE titre_boite=$1;", [`${idOrTitle}`]);
  } else {
    res = await client.query("SELECT * FROM boites WHERE id_boite=$1;", [idOrTitle]);
  }
  if (res.rows.length === 0) {
    await client.end();
    return eitherRight<Box, string>("Does not exist.");
  }
  const box = db2box(res.rows[0]);
		await client.end();

  return eitherLeft<Box, string>(box);
}

const getAllBoxes = async () => {
  const client = new_client();
  await client.connect();
  const res = await client.query("SELECT * FROM boites");
  await client.end();
  return res.rows.map(db2box);
}

const getAllBoxesFromDate = async (date: Date) => {
  const client = new_client();
  await client.connect();

	const YYYY = date.getFullYear();
	const MM = date.getMonth() + 1;
	const DD = date.getDate();
	const dateString = `${YYYY}-${MM}-${DD}`;

  const res = await client.query("SELECT * FROM boites WHERE date_boite > $1", [dateString]);
  await client.end();
  return res.rows.map(db2box);
}

const boxService = {
	getBox,
	getAllBoxes,
	getAllBoxesFromDate,
};

export default boxService;