// https://github.com/discordjs/discord.js/blob/master/src/util/Permissions.js
// Apache License Version 2.0 Copyright 2015 - 2021 Amish Shah

import { BitField } from "./BitField";

export type PermissionResolvable = string | number | Permissions | PermissionResolvable[];

export class Permissions extends BitField {
	static FLAGS = {
		CREATE_INSTANT_INVITE: 1n << 0n,
		KICK_MEMBERS: 1n << 1n,
		BAN_MEMBERS: 1n << 2n,
		ADMINISTRATOR: 1n << 3n,
		MANAGE_CHANNELS: 1n << 4n,
		MANAGE_GUILD: 1n << 5n,
		ADD_REACTIONS: 1n << 6n,
		VIEW_AUDIT_LOG: 1n << 7n,
		PRIORITY_SPEAKER: 1n << 8n,
		STREAM: 1n << 9n,
		VIEW_CHANNEL: 1n << 10n,
		SEND_MESSAGES: 1n << 11n,
		SEND_TTS_MESSAGES: 1n << 12n,
		MANAGE_MESSAGES: 1n << 13n,
		EMBED_LINKS: 1n << 14n,
		ATTACH_FILES: 1n << 15n,
		READ_MESSAGE_HISTORY: 1n << 16n,
		MENTION_EVERYONE: 1n << 17n,
		USE_EXTERNAL_EMOJIS: 1n << 18n,
		VIEW_GUILD_INSIGHTS: 1n << 19n,
		CONNECT: 1n << 20n,
		SPEAK: 1n << 21n,
		MUTE_MEMBERS: 1n << 22n,
		DEAFEN_MEMBERS: 1n << 23n,
		MOVE_MEMBERS: 1n << 24n,
		USE_VAD: 1n << 25n,
		CHANGE_NICKNAME: 1n << 26n,
		MANAGE_NICKNAMES: 1n << 27n,
		MANAGE_ROLES: 1n << 28n,
		MANAGE_WEBHOOKS: 1n << 29n,
		MANAGE_EMOJIS: 1n << 30n,
	};

	any(permission: PermissionResolvable, checkAdmin = true) {
		return (checkAdmin && super.has(Permissions.FLAGS.ADMINISTRATOR)) || super.any(permission);
	}

	/**
	 * Checks whether the bitfield has a permission, or multiple permissions.
	 * @param {PermissionResolvable} permission Permission(s) to check for
	 * @param {boolean} [checkAdmin=true] Whether to allow the administrator permission to override
	 * @returns {boolean}
	 */
	has(permission: PermissionResolvable, checkAdmin = true) {
		return (checkAdmin && super.has(Permissions.FLAGS.ADMINISTRATOR)) || super.has(permission);
	}
}