const fs = require('fs-extra');
const spawnSync	= require('child_process').spawnSync;
const { chdir } = require('process');

const basePath = `${__dirname}/../../..`;

function fileIsNewerThan(path1, path2) {
	if (!fs.existsSync(path2)) return true;

	const stat1 = fs.statSync(path1);
	const stat2 = fs.statSync(path2);

	return stat1.mtime > stat2.mtime;
}

function convertJsx(path) {
	chdir(`${__dirname}/..`);

	fs.readdirSync(path).forEach((filename) => {
		const jsxPath = `${path}/${filename}`;
		const p = jsxPath.split('.');
		if (p.length <= 1) return;
		const ext = p[p.length - 1];
		if (ext !== 'jsx') return;
		p.pop();

		const basePath = p.join('.');

		const jsPath = `${basePath}.min.js`;

		if (fileIsNewerThan(jsxPath, jsPath)) {
			console.info(`Compiling ${jsxPath}...`);

			// { shell: true } is needed to get it working on Windows:
			// https://discourse.joplinapp.org/t/attempting-to-build-on-windows/22559/12
			const result = spawnSync('yarn', ['run', 'babel', '--presets', 'react', '--out-file', jsPath, jsxPath], { shell: true });
			if (result.status !== 0) {
				const msg = [];
				if (result.stdout) msg.push(result.stdout.toString());
				if (result.stderr) msg.push(result.stderr.toString());
				console.error(msg.join('\n'));
				if (result.error) console.error(result.error);
				process.exit(result.status);
			}
		}
	});
}

module.exports = function() {
	convertJsx(`${__dirname}/../gui`);
	convertJsx(`${__dirname}/../gui/MainScreen`);
	convertJsx(`${__dirname}/../gui/NoteList`);
	convertJsx(`${__dirname}/../plugins`);

	// TODO: should get from node_modules @joplin/lib
	const libContent = [
		fs.readFileSync(`${basePath}/packages/lib/string-utils-common.js`, 'utf8'),
		fs.readFileSync(`${basePath}/packages/lib/markJsUtils.js`, 'utf8'),
		fs.readFileSync(`${basePath}/packages/lib/renderers/webviewLib.js`, 'utf8'),
	];

	fs.writeFileSync(`${__dirname}/../gui/note-viewer/lib.js`, libContent.join('\n'), 'utf8');

	return Promise.resolve();
};