import { getPermission, GuildModel, InviteModel, trimSpecial } from "@fosscord/server-util";
import { Router, Request, Response } from "express";
import { HTTPError } from "lambert-server";
import { check, Length } from "../../../util/instanceOf";
import { isMember } from "../../../util/Member";

const router = Router();

const InviteRegex = /\W/g;

router.get("/", async (req: Request, res: Response) => {
	const { guild_id } = req.params;

	await isMember(req.user_id, guild_id);
	const guild = await GuildModel.findOne({ id: guild_id }).exec();
	if (!guild.vanity_url) throw new HTTPError("This guild has no vanity url", 204);

	return res.json({ code: guild.vanity_url.code });
});

// TODO: check if guild is elgible for vanity url
router.patch("/", check({ code: new Length(String, 0, 20) }), async (req: Request, res: Response) => {
	const { guild_id } = req.params;
	var code = req.body.code.replace(InviteRegex);
	if (!code) code = null;

	const permission = await getPermission(req.user_id, guild_id);
	permission.hasThrow("MANAGE_GUILD");

	const alreadyExists = await Promise.all([
		GuildModel.findOne({ "vanity_url.code": code })
			.exec()
			.catch(() => null),
		InviteModel.findOne({ code: code })
			.exec()
			.catch(() => null)
	]);
	if (alreadyExists.some((x) => x)) throw new HTTPError("Vanity url already exists", 400);

	await GuildModel.updateOne({ id: guild_id }, { "vanity_url.code": code }).exec();

	return res.json({ code: code });
});

export default router;