const { SlashCommandBuilder, PermissionFlagsBits, ChannelType } = require('discord.js');
const logger = require('../utils/logger');

module.exports = {
    data: new SlashCommandBuilder()
        .setName('join')
        .setDescription('Joins your current voice channel'),
    async execute(interaction, client) { // Added client parameter
        await interaction.deferReply({ ephemeral: true }); // Defer reply as joining might take time

        const member = interaction.member;
        const voiceChannel = member?.voice?.channel;

        // 1. Check if user is in a voice channel
        if (!voiceChannel) {
            return interaction.editReply('You need to be in a voice channel to use this command!');
        }

        // 2. Check bot permissions
        const permissions = voiceChannel.permissionsFor(client.user);
        if (!permissions.has(PermissionFlagsBits.Connect)) {
            return interaction.editReply('I need permission to **connect** to your voice channel!');
        }
        if (!permissions.has(PermissionFlagsBits.Speak)) {
            return interaction.editReply('I need permission to **speak** in your voice channel!');
        }
        // Ensure it's a voice channel (not stage, etc.) although erela might handle this
        if (voiceChannel.type !== ChannelType.GuildVoice) {
             return interaction.editReply('I can only join standard voice channels.');
        }

        // 3. Create or get the player and connect
        let player = client.manager.get(interaction.guildId);

        if (!player) {
            try {
                player = client.manager.create({
                    guild: interaction.guildId,
                    voiceChannel: voiceChannel.id,
                    textChannel: interaction.channelId, // Store the channel where command was used
                    selfDeafen: true, // Automatically deafen the bot
                    // selfMute: false, // Bot starts unmuted
                });
                player.connect();
                logger.info(`Created player and connected to voice channel ${voiceChannel.name} (${voiceChannel.id}) in guild ${interaction.guild.name} (${interaction.guildId})`);
                await interaction.editReply(`Joined ${voiceChannel.name}! Ready to play music.`);

            } catch (error) {
                logger.error(`Failed to create/connect player for guild ${interaction.guildId}: ${error.message}`, error);
                // Try to destroy player if partially created
                if (player) player.destroy();
                return interaction.editReply('An error occurred while trying to join the voice channel.');
            }
        } else {
            // If player exists but is not connected or in a different channel
            if (player.voiceChannel !== voiceChannel.id) {
                 player.setVoiceChannel(voiceChannel.id);
                 if (!player.playing && !player.paused && !player.queue.size) {
                    player.connect(); // Connect if not already playing/paused/queued
                 }
                 logger.info(`Moved player to voice channel ${voiceChannel.name} (${voiceChannel.id}) in guild ${interaction.guildId}`);
                 await interaction.editReply(`Moved to ${voiceChannel.name}!`);
            } else {
                 // Already in the correct channel
                 await interaction.editReply(`I'm already in ${voiceChannel.name}!`);
            }
             // Update text channel if needed
             if (player.textChannel !== interaction.channelId) {
                player.setTextChannel(interaction.channelId);
                logger.debug(`Updated player text channel to ${interaction.channel.name} (${interaction.channelId}) in guild ${interaction.guildId}`);
             }
        }
    },
};