function deleteoldcache() {
	caches.delete("cache");
	console.log("this ran :P");
}

async function putInCache(request: URL | RequestInfo, response: Response) {
	console.log(request, response);
	const cache = await caches.open("cache");
	console.log("Grabbed");
	try {
		console.log(await cache.put(request, response));
	} catch (error) {
		console.error(error);
	}
}

let lastcache: string;
self.addEventListener("activate", async () => {
	console.log("Service Worker activated");
	checkCache();
});

async function checkCache() {
	if (checkedrecently) {
		return;
	}
	const promise = await caches.match("/getupdates");
	if (promise) {
		lastcache = await promise.text();
	}
	console.log(lastcache);
	fetch("/getupdates").then(async (data) => {
		setTimeout(
			(_: any) => {
				checkedrecently = false;
			},
			1000 * 60 * 30,
		);
		if (!data.ok) return;
		const text = await data.clone().text();
		console.log(text, lastcache);
		if (lastcache !== text) {
			deleteoldcache();
			putInCache("/getupdates", data);
		}
		checkedrecently = true;
	});
}
var checkedrecently = false;

function samedomain(url: string | URL) {
	return new URL(url).origin === self.origin;
}

const htmlFiles = new Set(["/index", "/login", "/home", "/register", "/oauth2/auth"]);

function isHtml(url: string): string | void {
	const path = new URL(url).pathname;
	if (htmlFiles.has(path) || htmlFiles.has(path + ".html")) {
		return path + path.endsWith(".html") ? "" : ".html";
	}
}
let enabled = "false";
let offline = false;

function toPath(url: string): string {
	const Url = new URL(url);
	let html = isHtml(url);
	if (!html) {
		const path = Url.pathname;
		if (path.startsWith("/channels")) {
			html = "./index.html";
		} else if (path.startsWith("/invite/") || path === "/invite") {
			html = "./invite.html";
		}
	}
	return html || Url.pathname;
}
let fails = 0;
async function getfile(event: FetchEvent): Promise<Response> {
	checkCache();
	if (
		!samedomain(event.request.url) ||
		enabled === "false" ||
		(enabled === "offlineOnly" && !offline)
	) {
		const responce = await fetch(event.request.clone());
		if (samedomain(event.request.url)) {
			if (enabled === "offlineOnly" && responce.ok) {
				putInCache(toPath(event.request.url), responce.clone());
			}
			if (!responce.ok) {
				fails++;
				if (fails > 5) {
					offline = true;
				}
			}
		}
		return responce;
	}

	let path = toPath(event.request.url);
	if (path === "/instances.json") {
		return await fetch(path);
	}
	console.log("Getting path: " + path);
	const responseFromCache = await caches.match(path);
	if (responseFromCache) {
		console.log("cache hit");
		return responseFromCache;
	}
	try {
		const responseFromNetwork = await fetch(path);
		if (responseFromNetwork.ok) {
			await putInCache(path, responseFromNetwork.clone());
		}
		return responseFromNetwork;
	} catch (e) {
		console.error(e);
		return new Response(null);
	}
}

self.addEventListener("fetch", (e) => {
	const event = e as FetchEvent;
	if (event.request.method === "POST") {
		return;
	}
	try {
		event.respondWith(getfile(event));
	} catch (e) {
		console.error(e);
	}
});

self.addEventListener("message", (message) => {
	const data = message.data;
	switch (data.code) {
		case "setMode":
			enabled = data.data;
			break;
		case "CheckUpdate":
			checkedrecently = false;
			checkCache();
			break;
		case "ForceClear":
			deleteoldcache();
			break;
	}
});