const path = require('path');
const args = require('yargs').argv;
const fs = require('fs').promises;

async function init() {
	await fs.copyFile(args.file, `${path.basename(args.file, path.extname(args.file))}_backup_${Date.now()}.json`);

	const filepath = path.join(process.cwd(), args.file);
	const points = require(filepath); // eslint-disable-line

	Object.entries(points).forEach(([game, scores]) => {
		const originKey = Object.keys(scores).find((userKey) => userKey.includes(`:${args.origin}`));
		const originScore = scores[originKey];

		const targetKey = Object.keys(scores).find((userKey) => userKey.includes(`:${args.target}`));
		const targetScore = scores[targetKey];

		if (typeof originScore === 'undefined' || typeof targetScore === 'undefined') {
			return;
		}

		const totalScore = targetScore + originScore;

		points[game][targetKey] = targetScore + originScore;
		delete points[game][originKey];

		console.log(`${game} ${targetScore} (${args.target}) + ${originScore} (${args.origin}) = ${totalScore}`);
	});

	await fs.writeFile(filepath, JSON.stringify(points, null, 4));

	console.log(`Saved ${filepath}`);
}

init();