import { EmbedBuilder, PermissionsBitField, SlashCommandBuilder } from "discord.js";
import fs from "fs/promises";
import { t, getLang } from "../util/i18n.js";

export default {
  name: "setchannel",
  description: "Ändert den Update-Kanal für eine beobachtete Ressource",
  aliases: [],
  guild: ["all"],
  nsfw: false,
  user_permissions: [PermissionsBitField.Flags.Administrator],
  bot_permissions: [],
  args_required: 2,
  args_usage: "[ressourcen_id] [#kanal]  Beispiel: vn!setchannel 72678 #updates",
  cooldown: 5,

  data: new SlashCommandBuilder()
    .setName("setchannel")
    .setDescription("Changes the update channel for a watched resource")
    .addStringOption((opt) =>
      opt.setName("ressourcen_id").setDescription("Spiget Ressourcen-ID").setRequired(true)
    )
    .addChannelOption((opt) =>
      opt.setName("kanal").setDescription("Neuer Update-Kanal").setRequired(true)
    ),

  async execute(client, ctx, args) {
    const guildID  = ctx.guild.id;
    const filePath = `./serverdata/${guildID}.json`;

    let saveData;
    try {
      const raw = await fs.readFile(filePath, "utf8");
      saveData = JSON.parse(raw);
    } catch {
      return ctx.reply("Dieser Server hat keine beobachteten Ressourcen.");
    }

    const lang = getLang(saveData);

    const resourceID = 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(t(lang, "add.invalidChannel"));
    }

    const watched = saveData.watchedResources.find(
      (r) => String(r.resourceID) === String(resourceID)
    );

    if (!watched) {
      return ctx.reply(t(lang, "setchannel.notWatched", { id: resourceID }));
    }

    watched.channelID = channel.id;

    try {
      await fs.writeFile(filePath, JSON.stringify(saveData, null, 2));
    } catch (e) {
      client.logger.error(e);
      return ctx.reply(t(lang, "error.saveFailed"));
    }

    const name  = watched.resourceName ?? resourceID;
    const embed = new EmbedBuilder()
      .setColor(ctx.guild.members.me.displayHexColor)
      .setDescription(t(lang, "setchannel.success", { name, channelID: channel.id }));

    return ctx.reply({ embeds: [embed] });
  },
};