import { readAccounts, writeAccounts, nextAccountId } from "~/server/database";
import { Account } from "~/shared/types/account";

export default defineEventHandler(async (event) => {
	let session = await getAccountSession(event);
	if (session) {
		throw createError({
			status: 409,
			message: "Cannot create account while having an active session."
		});
	}

	const formData = await readFormData(event);
	const name = formData.get("name");

	const accounts = await readAccounts();
	let account: Account;
	if (typeof name === "string") {
		if (name === "") {
			throw createError({
				status: 400,
				message: "Name cannot be blank",
			});
		}
		if (accounts.some(account => account.name && account.name.toLowerCase() === name.toLowerCase())) {
			throw createError({
				status: 409,
				message: "User already exists",
			});
		}

		account = {
			id: await nextAccountId(),
			type: "regular",
			name,
		};

	} else if (name === null) {
		account = {
			id: await nextAccountId(),
			type: "anonymous",
		};
	} else {
		throw createError({
			status: 400,
			message: "Invalid name",
		});
	}

	accounts.push(account);
	await writeAccounts(accounts);
	await setAccountSession(event, account.id);
})