const Logger = require('@lilywonhalf/pretty-logger');
const Discord = require('discord.js');
const CommandCategory = require('../command-category');
const CommandPermission = require('../command-permission');
const Guild = require('../guild');

class Avatar
{
    static instance = null;

    constructor() {
        if (Avatar.instance !== null) {
            return Avatar.instance;
        }

        this.aliases = ['av'];
        this.category = CommandCategory.FUN;
        this.isAllowedForContext = CommandPermission.yes;
        this.description = 'Displays the avatar of the specified member.';
    }

    /**
     * @param {Message} message
     * @param {Array} args
     */
    async process(message, args) {
        let user = null;

        if (args.length > 0) {
            const result = Guild.findDesignatedMemberInMessage(message);

            if (result.foundMembers.length > 0) {
                if (result.foundMembers[0].user !== undefined) {
                    user = result.foundMembers[0].user;
                } else {
                    user = result.foundMembers[0];
                }
            }
        } else {
            user = message.author;
        }

        if (user !== null) {
            const url = user.displayAvatarURL({ dynamic: true });

            message.channel.send(new Discord.MessageAttachment(
                url + '?size=2048',
                user.id + url.substr(url.lastIndexOf('.'))
            )).catch(error => Logger.warning(error.toString()));
        } else {
            message.reply('I... Have no idea who that could be, sorry.');
        }
    }
}

module.exports = new Avatar();