/*
	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
	Copyright (C) 2023 Spacebar and Spacebar Contributors
	
	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.
	
	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

import { route } from "@spacebar/api";
import {
	Channel,
	Config,
	DiscordApiErrors,
	User,
	Webhook,
	WebhookCreateSchema,
	WebhookType,
	handleFile,
	trimSpecial,
	isTextChannel,
} from "@spacebar/util";
import crypto from "crypto";
import { Request, Response, Router } from "express";
import { HTTPError } from "lambert-server";

const router: Router = Router();

//TODO: implement webhooks
router.get(
	"/",
	route({
		responses: {
			200: {
				body: "APIWebhookArray",
			},
		},
	}),
	async (req: Request, res: Response) => {
		res.json([]);
	},
);

// TODO: use Image Data Type for avatar instead of String
router.post(
	"/",
	route({
		requestBody: "WebhookCreateSchema",
		permission: "MANAGE_WEBHOOKS",
		responses: {
			200: {
				body: "WebhookCreateResponse",
			},
			400: {
				body: "APIErrorResponse",
			},
			403: {},
		},
	}),
	async (req: Request, res: Response) => {
		const channel_id = req.params.channel_id;
		const channel = await Channel.findOneOrFail({
			where: { id: channel_id },
		});

		isTextChannel(channel.type);
		if (!channel.guild_id) throw new HTTPError("Not a guild channel", 400);

		const webhook_count = await Webhook.count({ where: { channel_id } });
		const { maxWebhooks } = Config.get().limits.channel;
		if (maxWebhooks && webhook_count > maxWebhooks)
			throw DiscordApiErrors.MAXIMUM_WEBHOOKS.withParams(maxWebhooks);

		let { avatar, name } = req.body as WebhookCreateSchema;
		name = trimSpecial(name);

		// TODO: move this
		if (name === "clyde") throw new HTTPError("Invalid name", 400);
		if (name === "Spacebar Ghost") throw new HTTPError("Invalid name", 400);

		if (avatar) avatar = await handleFile(`/avatars/${channel_id}`, avatar);

		const hook = Webhook.create({
			type: WebhookType.Incoming,
			name,
			avatar,
			guild_id: channel.guild_id,
			channel_id: channel.id,
			user_id: req.user_id,
			token: crypto.randomBytes(24).toString("base64"),
		});

		const user = await User.getPublicUser(req.user_id);

		return res.json({
			...hook,
			user: user,
		});
	},
);

export default router;