const request = require('node-superfetch');
const Command = require('../Command');
const path = require('path');
const { reactIfAble } = require('../../util/Util');
const { IMGUR_KEY } = process.env;

module.exports = class ImgurAlbumCommand extends Command {
	constructor(client, info) {
		super(client, info);

		this.albumID = info.albumID;
		this.cache = null;
		this.credit.push({
			name: 'Imgur',
			url: 'https://imgur.com/',
			reason: 'API',
			reasonURL: 'https://apidocs.imgur.com/'
		});
		this.audio = info.audio || null;
	}

	async run(msg, { user }) {
		if (this.audio) {
			const connection = msg.guild ? this.client.voice.connections.get(msg.guild.id) : null;
			if (msg.guild && connection && !this.client.dispatchers.has(msg.guild.id)) {
				const dispatcher = connection.play(path.join(__dirname, '..', '..', 'assets', 'sounds', this.audio));
				this.client.dispatchers.set(msg.guild.id, dispatcher);
				dispatcher.once('finish', () => this.client.dispatchers.delete(msg.guild.id));
				dispatcher.once('error', () => this.client.dispatchers.delete(msg.guild.id));
				await reactIfAble(msg, this.client.user, '🔉');
			}
		}
		try {
			const image = await this.random();
			if (!image) return msg.reply('This album has no images...');
			return msg.say(this.generateText(msg, user), { files: [image] });
		} catch (err) {
			return msg.reply(`Oh no, an error occurred: \`${err.message}\`. Try again later!`);
		}
	}

	generateText() {
		throw new Error('The generateText method is required.');
	}

	async random() {
		if (this.cache) return this.cache[Math.floor(Math.random() * this.cache.length)];
		const { body } = await request
			.get(`https://api.imgur.com/3/album/${this.albumID}`)
			.set({ Authorization: `Client-ID ${IMGUR_KEY}` });
		if (!body.data.images.length) return null;
		this.cache = body.data.images.map(image => image.link);
		setTimeout(() => { this.cache = null; }, 3.6e+6);
		return body.data.images[Math.floor(Math.random() * body.data.images.length)].link;
	}
};