(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 version of versions) {
			const heading = document.getElementById(version.name);

			if (version.lib.length == 0 && version.non_lib.length == 0) {
				heading.hidden = query.length != 0;
				continue;
			}
			const nonLibResults = search(version.non_lib, query);
			const libResults = search(version.lib, 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(version.name + '-non-lib-list');
			if (list) {
				list.replaceChildren(...renderList(nonLibResults).children);
				list.hidden = nonLibResults.length == 0;
			}

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

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

function search(features, query) {
	return 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;
}