import { Schedule } from "~/shared/types/schedule";
import { readFile, writeFile } from "fs/promises";
import { broadcastUpdate } from "~/server/streams";
import { sendPush } from "~/server/web-push";

export default defineEventHandler(async (event) => {
	const formData = await readFormData(event);
	const schedule: Schedule = JSON.parse(await readFile("schedule.json", "utf-8"));
	const id = formData.get("id") as string;
	const name = formData.get("name") as string;
	const description = formData.get("description") as string;
	const start = formData.get("start") as string;
	const end = formData.get("end") as string;
	const location = formData.get("location") as string;
	const index = schedule.events.findIndex(event => event.id === id);
	if (index === -1) {
		throw Error("No such event");
	}
	const timeChanged = schedule.events[index].slots[0].start !== start + "Z";
	schedule.events[index] = {
		name,
		id,
		description,
		slots: [
			{
				id: `${id}-1`,
				start: start + "Z",
				end: end + "Z",
				locations: [location],
			}
		]
	};
	broadcastUpdate(schedule);
	await writeFile("schedule.json", JSON.stringify(schedule, null, "\t"), "utf-8");
	if (timeChanged)
		await sendPush(`New time for ${name}`, `${name} will now start at ${start}`);
});