"use strict";
/**
 * Model: Users
 */
const utils = require(`../../utils`);
const db = require(`../db`);
const schemas = require(`./schemas`);
const sharedSchemas = require(`../schemas`);
const validation = require(`../validation`);

/**
 * Create a new user
 * @param {string} user.email User email
 * @param {string} user.password User password
 */
const create = async (user = {}) => {
	validation.validateOrThrow(schemas.create, user);

	const existingUser = await getByEmail(user.email);
	if (existingUser) {
		throw utils.customError(
			`A user with email "${user.email}" is already registered`
		);
	}

	user.password = utils.hashPassword(user.password);

	await db.put(`user`, {
		hk: user.email,
		password: user.password,
	});
};

/**
 * Get user by email address
 * @param {string} email Email address of user to retrieve
 */
const getByEmail = async (email) => {
	validation.validateOrThrow(sharedSchemas.email, email);

	let user = await db.getByKey(email);

	user = user.Items && user.Items[0] ? user.Items[0] : null;
	return user;
};

/**
 * Get user by id
 * @param {string} id
 */
const getById = async (id) => {
	validation.validateOrThrow(sharedSchemas.id, id);

	let user = await db.getById(`user`, id);

	user = user.Items && user.Items[0] ? user.Items[0] : null;
	return user;
};

/**
 * Convert user record to public format
 * This hides the keys used for the dynamodb's single table design and returns human-readable properties.
 * @param {*} user
 */
const convertToPublicFormat = (user = {}) => {
	user.email = user.hk || null;
	user.id = user.sk2 || null;
	if (user.hk) {
		delete user.hk;
	}
	if (user.sk) {
		delete user.sk;
	}
	if (user.sk2) {
		delete user.sk2;
	}
	if (user.password) {
		delete user.password;
	}
	return user;
};

module.exports = {
	create,
	getByEmail,
	getById,
	convertToPublicFormat,
};