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: 3000
		});
	}

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

		let i0 = 0,
			i1 = 10,
			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({
				name: message.author.tag,
				iconURL: message.author.displayAvatarURL({
					size: 512,
					dynamic: true,
					format: "png"
				})
			})
			.setColor(data.config.embed.color)
			.setFooter({
				text: 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({
			embeds: [embed]
		});

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

		const filter = (reaction, user) => user.id === message.author.id;
		const collector = msg.createReactionCollector({
			filter,
			time: 30000
		});

		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({
					embeds: [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({
					embeds: [embed]
				});
			};

			if (reaction._emoji.name === "❌" && !message.channel.type !== "DM") return msg.delete();

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

module.exports = ServersList;