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

	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);
	}
}