'use strict';

const fs = require('fs');
const moment = require('moment');

const knex = require('../knex');

async function save() {
	const filename = `alerts-${moment().format('YYYY-MM-DD_hh_mm')}.json`;

	const alerts = await knex('alerts')
		.select([
			'alerts.*',
			'users.username',
			'entities.slug as entity_slug',
			'entities.type as entity_type',
		])
		.leftJoin('users', 'users.id', 'alerts.user_id')
		.leftJoin('alerts_entities', 'alerts_entities.alert_id', 'alerts.id')
		.leftJoin('entities', 'entities.id', 'alerts_entities.entity_id');

	let savedAlerts = 0;

	await alerts.reduce(async (chain, alert) => {
		await chain;

		const actors = await knex('alerts_actors')
			.select('actors.slug', 'entities.slug as entity_slug', 'entities.type as entity_type')
			.leftJoin('actors', 'actors.id', 'alerts_actors.actor_id')
			.leftJoin('entities', 'entities.id', 'actors.entity_id')
			.where('alert_id', alert.id);

		const tags = await knex('alerts_tags')
			.select('tags.slug')
			.leftJoin('tags', 'tags.id', 'alerts_tags.tag_id')
			.where('alert_id', alert.id);

		const stashes = await knex('alerts_stashes')
			.select('stashes.slug')
			.leftJoin('stashes', 'stashes.id', 'alerts_stashes.stash_id')
			.where('alert_id', alert.id);

		const curatedAlert = {
			username: alert.username,
			notify: alert.notify,
			email: alert.email,
			createdAt: alert.created_at,
			actors: actors.map((actor) => ({
				slug: actor.slug,
				entitySlug: actor.entity_slug,
				entityType: actor.entity_type,
			})),
			tags: tags.map((tag) => tag.slug),
			stashes: stashes.map((stash) => stash.slug),
			entitySlug: alert.entity_slug,
			entityType: alert.entity_type,
		};

		await fs.promises.appendFile(filename, `${JSON.stringify(curatedAlert)}\n`);

		console.log(`Saved ${alert.username} alert`);

		savedAlerts += 1;
	}, Promise.resolve());

	console.log(`Saved ${savedAlerts} alerts to ${filename}`);

	process.exit();
}

save();