"use strict";
/**
 * Model: Users
 */

const utils = require(`../utils`);
const db = require(`./db`);

/**
 * Register user
 * @param {string} user.email User email
 * @param {string} user.password User password
 */
const register = async (user = {}) => {
	if (!user.email) {
		throw new Error(`"email" is required`);
	}
	if (!user.password) {
		throw new Error(`"password" is required`);
	}
	if (!utils.validateEmailAddress(user.email)) {
		throw new Error(`"${user.email}" is not a valid email address`);
	}

	// Check if user is already registered
	const existingUser = await getByEmail(user.email);
	if (existingUser) {
		throw new Error(`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
 */

const getByEmail = async (email) => {
	if (!email) {
		throw new Error(`"email" is required`);
	}
	if (!utils.validateEmailAddress(email)) {
		throw new Error(`"${email}" is not a valid email address`);
	}

	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) => {
	if (!id) {
		throw new Error(`"id" is required`);
	}

	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 = {
	register,
	getByEmail,
	getById,
	convertToPublicFormat,
};