const Command = require('../../base/Command.js');
const Discord = require('discord.js');

class Eval extends Command {
    constructor (client) {
        super(client, {
            description: 'Evaluates arbitrary Javascript.',
            usage: 'eval <expression>',
            aliases: ['ev'],
            permLevel: 'Bot Owner',
            devOnly: true
        });
    }

    async run (message, args, data) { // eslint-disable-line no-unused-vars
        const code = args.join(' ');
        try {
            const evaled = eval(code);
            const clean = await this.client.functions.clean(evaled);
            const MAX_CHARS = 3 + 2 + clean.length + 3;
            if (MAX_CHARS > 2000) {
                message.channel.send({ files: [new Discord.MessageAttachment(Buffer.from(clean), 'output.txt')] });
            }
            message.channel.send(`\`\`\`js\n${clean}\n\`\`\``);
        } catch (err) {
            const e = await this.client.functions.clean(err);
            const MAX_CHARS = 1 + 5 + 1 + 3 + e.length + 3;
            if (MAX_CHARS > 2000) {
                return message.channel.send({ files: [new Discord.MessageAttachment(Buffer.from(e), 'error.txt')] });
            }

            message.channel.send(`\`ERROR\` \`\`\`xl\n${e}\n\`\`\``);
        }
    }
}

module.exports = Eval;