import type { Handle } from "@sveltejs/kit";
import { error, redirect } from "@sveltejs/kit";

import SessionStore from "$lib/server/session_store"
import { init_db, close_db, get_user } from "$lib/server/database";

async function init() {

	if (process.env.APP_USER_DATA_PATH == null) {
		console.log("APP_USER_DATA_PATH is not defined. Exiting.");
		process.exit(-1);
	}

	if (process.env.APP_TMP_USER_DATA_PATH == null) {
		console.log("APP_TMP_USER_DATA_PATH is not defined. Exiting.");
		process.exit(-1);
	}
	
	await init_db();

	console.log("started");

}

function deinit() {
	close_db();
	console.log('exit');
}

await init();

process.on('exit', (_) => {
	deinit();
	process.exit(0);
});

process.on('SIGINT', (_) => {
	console.log("SIGINT")
	process.exit(0);
})

export let handle: Handle = async function ({ event, resolve }) {

	console.log("incoming ", event.request.method, " request to: ", event.url.href, " (route id: ", event.route.id, ")");

	event.setHeaders({
		//"Strict-Transport-Security": "max-age=63072000; includeSubdomains; preload",
		"X-Frame-Options": "Deny",
		"X-Content-Type-Options": "nosniff",
		"Referrer-Policy": "strict-origin-when-cross-origin"
	})
	
	if (event.route.id == null) {
		return error(404, "This page does not exist.");
	}

	const token = event.cookies.get("session_id")
	const user = SessionStore.get_user_by_access_token(token ?? "")

	console.log("tried access with token: ", token)

	if (!token || !user) {
		if (event.request.method == "POST" && event.route.id != "/login") {
			return error(401, "Invalid Session");
		}

		if (token) {
			event.cookies.delete("session_id", { path: "/" });
		}

		if (event.route.id == "/login") {
			return await resolve(event);
		} else {
			event.url.searchParams.set("redirect", event.route.id);
			return redirect(302, `/login?${event.url.searchParams}`);
		}
	}

	event.locals.user = user;

	return await resolve(event);
}