import { Router, Request, Response } from "express";
import { HTTPError } from "lambert-server";
import { route } from "@fosscord/api";
import { random } from "@fosscord/api";
import {
	Channel,
	Invite,
	InviteCreateEvent,
	emitEvent,
	User,
	Guild,
	PublicInviteRelation,
} from "@fosscord/util";
import { isTextChannel } from "./messages";

const router: Router = Router();

router.post(
	"/",
	route({
		body: "InviteCreateSchema",
		permission: "CREATE_INSTANT_INVITE",
		right: "CREATE_INVITES",
	}),
	async (req: Request, res: Response) => {
		const { user_id } = req;
		const { channel_id } = req.params;
		const channel = await Channel.findOneOrFail({
			where: { id: channel_id },
			select: ["id", "name", "type", "guild_id"],
		});
		isTextChannel(channel.type);

		if (!channel.guild_id) {
			throw new HTTPError("This channel doesn't exist", 404);
		}
		const { guild_id } = channel;

		const expires_at = new Date(req.body.max_age * 1000 + Date.now());

		const invite = await Invite.create({
			code: random(),
			temporary: req.body.temporary || true,
			uses: 0,
			max_uses: req.body.max_uses,
			max_age: req.body.max_age,
			expires_at,
			created_at: new Date(),
			guild_id,
			channel_id: channel_id,
			inviter_id: user_id,
		}).save();
		const data = invite.toJSON();
		data.inviter = await User.getPublicUser(req.user_id);
		data.guild = await Guild.findOne({ where: { id: guild_id } });
		data.channel = channel;

		await emitEvent({
			event: "INVITE_CREATE",
			data,
			guild_id,
		} as InviteCreateEvent);
		res.status(201).send(data);
	},
);

router.get(
	"/",
	route({ permission: "MANAGE_CHANNELS" }),
	async (req: Request, res: Response) => {
		const { user_id } = req;
		const { channel_id } = req.params;
		const channel = await Channel.findOneOrFail({
			where: { id: channel_id },
		});

		if (!channel.guild_id) {
			throw new HTTPError("This channel doesn't exist", 404);
		}
		const { guild_id } = channel;

		const invites = await Invite.find({
			where: { guild_id },
			relations: PublicInviteRelation,
		});

		res.status(200).send(invites);
	},
);

export default router;