import type { GuildTextBasedChannel, TextChannel } from "discord.js";

import { ChannelType } from "discord.js";

import { client } from "@/client";

export async function getTextChannel(id: string, mustBeSendable = true): Promise<TextChannel> {
	const channel = await client.channels.fetch(id);
	if (!channel) throw new Error(`Channel not found: ${id}`);
	if (channel.type !== ChannelType.GuildText) throw new Error(`Channel is not text-based: ${id}`);

	if (!mustBeSendable) return channel;
	if (!channel.isSendable()) throw new Error(`Channel is not sendable: ${id}`);

	return channel;
}

export async function getSendableChannel(id: string): Promise<GuildTextBasedChannel> {
	const channel = await client.channels.fetch(id);
	if (!channel) throw new Error(`Channel not found: ${id}`);
	if (!channel.isSendable() && !channel.isTextBased())
		throw new Error(`Channel is not sendable or text-based: ${id}`);
	if (!("guild" in channel)) throw new Error(`Channel is not sendable: ${id}`);

	return channel;
}

export async function getCategory(id: string) {
	const channel = await client.channels.fetch(id);
	if (!channel) throw new Error(`Category not found: ${id}`);
	if (channel.type !== ChannelType.GuildCategory)
		throw new Error(`Channel is not a category: ${id}`);

	return channel;
}