(async function(){
	const res = await fetch('data.json');
	const versions = await res.json();

	const input = document.getElementById('search');
	input.focus();
	input.addEventListener('input', (e) => {
		const query = e.target.value.toLowerCase();
		for (const [key, data] of Object.entries(versions)) {
			const heading = document.getElementById(key);

			if (data.features == undefined) {
				heading.hidden = query.length != 0;
				continue;
			}
			const nonLibResults = search(data.features.non_lib_features, query);
			const libResults = search(data.features.lib_features, query);

			const totalResultCount = nonLibResults.length + libResults.length;

			// so that release notes don't get in the way when <Tab>ing through results
			document.body.classList.toggle('hide-release-notes', totalResultCount == 0);

			let list = document.getElementById(key + '-non-lib-list');
			if (list) {
				list.replaceChildren(...renderList(nonLibResults).children);
				list.hidden = nonLibResults.length == 0;
			}

			list = document.getElementById(key + '-lib-list');
			if (list) {
				list.replaceChildren(...renderList(libResults).children);
				list.hidden = libResults.length == 0;
				document.getElementById(key + '-lib').hidden = libResults.length == 0;
			}

			heading.hidden = totalResultCount == 0;
		}
	});
})();

function search(features, query) {
	return Object.values(features).filter(
		feat => {
			if (feat.title.toLowerCase().replaceAll('`', '').includes(query)) {
				return true;
			}
			if (feat.flag && feat.flag.toLowerCase().includes(query)) {
				return true;
			}
			if (query.length > 1) {
				if (feat.aliases && feat.aliases.some(a => a.toLowerCase().includes(query))) {
					return true;
				}
				if (feat.items && feat.items.some(i => i.toLowerCase().includes(query))) {
					return true;
				}
			}

			return false;
		}
	);
}

function renderList(results) {
	const ul = document.createElement('ul');
	for (const feat of results) {
		const li = document.createElement('li');
		const a = document.createElement('a');
		a.textContent = feat.title;
		a.innerHTML = a.innerHTML.replaceAll(/`(.+?)`/g, (_, x) => `<code>${x}</code>`);
		if (feat.url)
			a.href = feat.url;
		if (feat.flag)
			a.title = feat.flag;
		li.appendChild(a);
		ul.appendChild(li);
	}
	return ul;
}