import {
  EmbedBuilder,
  PermissionsBitField,
  SlashCommandBuilder,
  ActionRowBuilder,
  ButtonBuilder,
  ButtonStyle,
} from "discord.js";
import fs from "fs/promises";
import { Spiget } from "spiget";
import {
  generateAvatarLink,
  generateAuthorURL,
  generateResourceIconURL,
} from "../util/helpers.js";

const spiget = new Spiget("Viper-Network");
export default {
  name: "add",
  description: "Richtet einen Listener ein, der Plugin-Updates in einem bestimmten Kanal postet",
  aliases: [],
  guild: ["all"],
  nsfw: false,
  user_permissions: [PermissionsBitField.Flags.Administrator],
  bot_permissions: [],
  args_required: 2,
  args_usage: "[ressourcen_id] [kanal]  Beispiel: vn!add 72678 #ankündigungen",
  cooldown: 5,

  data: new SlashCommandBuilder()
    .setName("add")
    .setDescription("Richtet einen Listener für Plugin-Updates ein")
    .addStringOption((opt) =>
      opt.setName("ressourcen_id").setDescription("Spiget Ressourcen-ID").setRequired(true)
    )
    .addChannelOption((opt) =>
      opt.setName("kanal").setDescription("Kanal für Update-Benachrichtigungen").setRequired(true)
    ),

  async execute(client, ctx, args) {
    const resourceArg = ctx.isSlash
      ? ctx.interaction.options.getString("ressourcen_id")
      : args[0];

    const channel = ctx.isSlash
      ? ctx.interaction.options.getChannel("kanal")
      : ctx.mentions?.channels?.first();

    if (!channel) {
      return ctx.reply("Dieser Kanal ist ungültig. Bitte erwähne einen Kanal auf diesem Server.");
    }
    if (!ctx.guild.channels.cache.has(channel.id)) {
      return ctx.reply("Dieser Kanal befindet sich nicht auf diesem Server!");
    }

    let resource;
    try {
      resource = await spiget.getResource(resourceArg);
    } catch (e) {
      client.logger.error(e);
      return ctx.reply(`Ups! \`${resourceArg}\` ist keine gültige Ressourcen-ID!`);
    }

    let author;
    try {
      author = await resource.getAuthor();
    } catch (e) {
      client.logger.error(e);
      return ctx.reply(`Ups! Der Autor für Ressource \`${resourceArg}\` konnte nicht gefunden werden.`);
    }

    let latestVersion;
    try {
      const res = await fetch(`https://api.spigotmc.org/legacy/update.php?resource=${resourceArg}`);
      if (!res.ok) throw new Error(`HTTP ${res.status}`);
      latestVersion = (await res.text()).trim();
    } catch (e) {
      client.logger.error(e);
      return ctx.reply("Die neueste Version konnte nicht von SpigotMC abgerufen werden. Bitte versuche es erneut.");
    }

    const guildID  = ctx.guild.id;
    const filePath = `./serverdata/${guildID}.json`;

    // Check existing data & limits
    let saveData = { watchedResources: [] };
    try {
      const raw = await fs.readFile(filePath, "utf8");
      saveData = JSON.parse(raw);

      const duplicate = saveData.watchedResources.find((r) => r.resourceID == resource.id);
      if (duplicate) {
        return ctx.reply(`Diese Ressource wird bereits in <#${duplicate.channelID}> beobachtet.`);
      }


    } catch {
      // Datei existiert noch nicht
    }

    const authorURL       = generateAuthorURL(author.name, author.id);
    const authorAvatarURL = generateAvatarLink(author.id);
    const resourceIconURL = generateResourceIconURL(resource);
    const resourceURL     = `https://spigotmc.org/resources/.${resourceArg}/`;

    // Build confirmation embed with buttons
    const confirmEmbed = new EmbedBuilder()
      .setAuthor({ name: `Autor: ${author.name}`, iconURL: authorAvatarURL, url: authorURL })
      .setColor(ctx.guild.members.me.displayHexColor)
      .setTitle(`Plugin beobachten: ${resource.name}`)
      .setDescription(`${resource.tag}\n\nSoll dieses Plugin in <#${channel.id}> beobachtet werden?`)
      .addFields([
        { name: "Kanal",    value: `<#${channel.id}>`, inline: true },
        { name: "Version",  value: latestVersion,       inline: true },
        { name: "Download", value: resourceURL,         inline: false },
      ])
      .setThumbnail(resourceIconURL)
      .setTimestamp();

    const row = new ActionRowBuilder().addComponents(
      new ButtonBuilder()
        .setCustomId("add_confirm")
        .setLabel("✅ Bestätigen")
        .setStyle(ButtonStyle.Success),
      new ButtonBuilder()
        .setCustomId("add_cancel")
        .setLabel("❌ Abbrechen")
        .setStyle(ButtonStyle.Danger)
    );

    const confirmMsg = await ctx.reply({ embeds: [confirmEmbed], components: [row], fetchReply: true });

    // Wait for button click (30 seconds)
    let btnInteraction;
    try {
      btnInteraction = await confirmMsg.awaitMessageComponent({
        filter: (i) => i.user.id === ctx.author.id,
        time: 30_000,
      });
    } catch {
      // Timeout
      const timeoutEmbed = EmbedBuilder.from(confirmEmbed)
        .setColor("#808080")
        .setDescription("⏱️ Zeit abgelaufen – Befehl wurde abgebrochen.");
      return confirmMsg.edit({ embeds: [timeoutEmbed], components: [] });
    }

    if (btnInteraction.customId === "add_cancel") {
      const cancelEmbed = EmbedBuilder.from(confirmEmbed)
        .setColor("#FF0000")
        .setDescription("❌ Abgebrochen.");
      return btnInteraction.update({ embeds: [cancelEmbed], components: [] });
    }

    // Confirmed – save data
    saveData.watchedResources.push({
      resourceID:          resource.id,
      resourceName:        resource.name,
      channelID:           channel.id,
      lastCheckedVersion:  latestVersion,
    });

    try {
      await fs.mkdir("./serverdata", { recursive: true });
      await fs.writeFile(filePath, JSON.stringify(saveData, null, 2));
    } catch (e) {
      client.logger.error(e);
      return btnInteraction.update({ content: "Beim Speichern der Beobachtungsdaten ist ein Fehler aufgetreten.", components: [] });
    }

    const successEmbed = EmbedBuilder.from(confirmEmbed)
      .setTitle(`✅ Wird jetzt beobachtet: ${resource.name}`)
      .setDescription(resource.tag)
      .setColor("#00FF00");

    return btnInteraction.update({ embeds: [successEmbed], components: [] });
  },
};