const fs = require('fs');
const path = require('path');
const os = require('os');
const sha512 = require('js-sha512');
const distDirName = 'dist';
const distPath = path.join(__dirname, distDirName);

const generateChecksumFile = () => {
	if (os.platform() !== 'linux') {
		return []; // SHA-512 is only for AppImage
	}

	let appImageName = '';
	const files = fs.readdirSync(distPath);
	for (const key in files) {
		const filename = files[key];
		if (filename.includes('AppImage')) {
			appImageName = filename;
			break;
		}
	}
	if (appImageName === '') {
		throw new Error('AppImage not found!');
	}
	const appImagePath = path.join(distPath, appImageName);
	const appImageContent = fs.readFileSync(appImagePath);
	const checksum = sha512.sha512(appImageContent);
	const sha512FileName = `${appImageName}.sha512`;
	const sha512FilePath = path.join(distPath, sha512FileName);
	fs.writeFileSync(sha512FilePath, checksum);
	return [sha512FilePath];
};

const renameLatestYmlFile = () => {
	if (os.platform() === 'darwin' && process.arch === 'arm64') {
		// latest-mac.yml is only generated when publishing.
		if (process.env.PUBLISH_ENABLED === 'false') {
			/* eslint-disable no-console */
			console.info(`Publishing not enabled - skipping renaming latest-mac.yml file for arm64 architecture. process.env.PUBLISH_ENABLED = ${process.env.PUBLISH_ENABLED}`);
			return;
		}

		/* eslint-disable no-console */
		console.info('Renaming latest-mac.yml file...');
		const latestMacFilePath = path.join(distPath, 'latest-mac.yml');
		const renamedMacFilePath = path.join(distPath, 'latest-mac-arm64.yml');

		if (fs.existsSync(latestMacFilePath)) {
			/* eslint-disable no-console */
			console.info('Renamed latest-mac.yml file to latest-mac-arm64.yml succesfully!');
			fs.renameSync(latestMacFilePath, renamedMacFilePath);
			return [renamedMacFilePath];
		} else {
			throw new Error('latest-mac.yml not found!');
		}
	}
};

const mainHook = () => {
	generateChecksumFile();
	renameLatestYmlFile();
};

exports.default = mainHook;