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

class ServersList extends Command {
	constructor (client) {
		super(client, {
			name: "servers-list",
			dirname: __dirname,
			enabled: true,
			guildOnly: false,
			aliases: [ "slist" ],
			memberPermissions: [],
			botPermissions: [ "SEND_MESSAGES", "EMBED_LINKS" ],
			nsfw: false,
			ownerOnly: true,
			cooldown: 5000
		});
	}

	async run (message, args, data) {
		if (!message.channel.type != "dm") await message.delete();

		let i0 = 0;
		let i1 = 10;
		let page = 1;

		let description = `${message.translate("common:SERVERS")}: ${this.client.guilds.cache.size}\n\n` +
		this.client.guilds.cache.sort((a,b) => b.memberCount-a.memberCount).map((r) => r)
			.map((r, i) => `**${i + 1}** - ${r.name} | ${r.memberCount} ${message.translate("common:MEMBERS").toLowerCase()}`)
			.slice(0, 10)
			.join("\n");

		const embed = new Discord.MessageEmbed()
			.setAuthor(message.author.tag, message.author.displayAvatarURL({ size: 512, dynamic: true, format: 'png' }))
			.setColor(data.config.embed.color)
			.setFooter(this.client.user.username)
			.setTitle(`${message.translate("common:PAGE")}: ${page}/${Math.ceil(this.client.guilds.cache.size/10)}`)
			.setDescription(description);

		const msg = await message.channel.send(embed);

		await msg.react("⬅");
		await msg.react("➡");
		await msg.react("❌");

		const collector = msg.createReactionCollector((reaction, user) => user.id === message.author.id);

		collector.on("collect", async(reaction) => {
			if (reaction._emoji.name === "⬅") {
				// Updates variables
				i0 = i0 - 10;
				i1 = i1 - 10;
				page = page - 1;

				// if there is no guild to display, delete the message
				if (i0 < 0) return msg.delete();
				if (!i0 || !i1) return msg.delete();

				description = `${message.translate("common:SERVERS")}: ${this.client.guilds.cache.size}\n\n` +
				this.client.guilds.cache.sort((a,b) => b.memberCount-a.memberCount).map((r) => r)
					.map((r, i) => `**${i + 1}** - ${r.name} | ${r.memberCount} ${message.translate("common:MEMBERS")}`)
					.slice(i0, i1)
					.join("\n");

				// Update the embed with new informations
				embed.setTitle(`${message.translate("common:PAGE")}: ${page}/${Math.round(this.client.guilds.cache.size/10)}`)
					.setDescription(description);

				// Edit the message
				msg.edit(embed);
			};

			if (reaction._emoji.name === "➡") {
				// Updates variables
				i0 = i0 + 10;
				i1 = i1 + 10;
				page = page + 1;

				// if there is no guild to display, delete the message
				if (i1 > this.client.guilds.cache.size + 10) return msg.delete();
				if (!i0 || !i1) return msg.delete();

				description = `${message.translate("common:SERVERS")}: ${this.client.guilds.cache.size}\n\n` +
				this.client.guilds.cache.sort((a,b) => b.memberCount-a.memberCount).map((r) => r)
					.map((r, i) => `**${i + 1}** - ${r.name} | ${r.memberCount} ${message.translate("common:MEMBERS").toLowerCase()}`)
					.slice(i0, i1)
					.join("\n");

				// Update the embed with new informations
				embed.setTitle(`${message.translate("common:PAGE")}: ${page}/${Math.round(this.client.guilds.cache.size/10)}`)
					.setDescription(description);

				// Edit the message
				msg.edit(embed);
			};

			if (reaction._emoji.name === "❌") return msg.delete();

			// Remove the reaction when the user react to the message
			await reaction.users.remove(message.author.id);
		});
	}
};

module.exports = ServersList;