import { DebugBuilder } from "../../modules/debugger.mjs";
import { SlashCommandBuilder } from 'discord.js';
import { joinNode, getAvailableNodes, promptNodeSelection, getUserVoiceChannel } from '../modules/wrappers.mjs';
import { getAllSystems, getSystemByName } from '../../modules/mongo-wrappers/mongoSystemsWrappers.mjs';

const log = new DebugBuilder("server", "discordBot.command.join");

// Exporting data property
export const data = new SlashCommandBuilder()
  .setName('join')
  .setDescription('Listen to the selected radio system in your channel')
  .addStringOption(system =>
    system.setName('system')
      .setDescription('The radio system you would like to listen to')
      .setRequired(true)
      .setAutocomplete(true)
  );

// Exporting other properties
export const example = "/join";
export const deferInitialReply = true;

/**
 * Function to give the user auto-reply suggestions
 * @param {any} nodeIo The nodeIO server for manipulation of sockets
 * @param {any} interaction The interaction object
 */
export async function autocomplete(nodeIo, interaction) {
  const focusedValue = interaction.options.getFocused();
  const choices = await getAllSystems();
  const filtered = choices.filter(choice => choice.name.startsWith(focusedValue));

  log.DEBUG(focusedValue, choices, filtered);

  await interaction.respond(
    filtered.map(choice => ({ name: choice.name, value: choice.name }))
  );
}

/**
 * Handle join command execution
 * @param {any} nodeIo The nodeIO server for manipulation of sockets
 * @param {any} interaction The interaction object
 */
export async function execute(nodeIo, interaction) {
  try {
    // Validate user is in a voice channel
    const channelToJoin = getUserVoiceChannel(interaction);
    if (!channelToJoin) return;

    // Get the selected system
    const selectedSystemName = interaction.options.getString('system');
    const system = await getSystemByName(selectedSystemName);

    // Check if there was a system found by the given system name
    if (!system) {
      await interaction.editReply({ content: `System '${selectedSystemName}' not found.`, ephemeral: true });
      return;
    }

    // Get the available nodes for this system
    const availableNodes = await getAvailableNodes(nodeIo, interaction.guild.id, system);

    // Check if there are available nodes
    if (availableNodes.length === 0) {
      // If not, let the user know
      await interaction.editReply(`<@${interaction.member.id}>, the selected system has no available nodes`);
      return;
    }

    // If there is one available node, request that node join
    if (availableNodes.length === 1) {
      await joinNode(nodeIo, interaction, availableNodes[0].id, system, channelToJoin);
    } 

    // If there are more than one available, prompt the user for their selected node
    else {
      await promptNodeSelection(interaction, availableNodes, async selectedNode => {
        await joinNode(nodeIo, interaction, selectedNode, system, channelToJoin);
      });
    }
  } 
  
  catch (err) {
    log.ERROR(err);
    await interaction.editReply({ content: `An error occurred: ${err.message}`, ephemeral: true });
  }
}