import { SlashCommandBuilder, PermissionFlagsBits } from 'discord.js';

/**
 * botUtils module - provides administrative bot control commands
 * Currently implements an owner-only exit command for graceful shutdown.
 */
// Define slash commands
export const commands = [
  {
    data: new SlashCommandBuilder()
      .setName('exit')
      .setDescription('Gracefully shutdown the bot (owner only)')
      // Restrict to server administrators by default
      .setDefaultMemberPermissions(PermissionFlagsBits.Administrator)
      .setDMPermission(false)
      .addIntegerOption(option =>
        option
          .setName('code')
          .setDescription('Exit code to use (default 0)')
          .setRequired(false)
      ),
    /**
     * Execute the exit command: only the configured owner can invoke.
     * @param {import('discord.js').CommandInteraction} interaction
     * @param {import('discord.js').Client} client
     */
    async execute(interaction, client) {
      const ownerId = client.config.owner;
      // Check invoking user is the bot owner
      if (interaction.user.id !== String(ownerId)) {
        return interaction.reply({ content: 'Only the bot owner can shutdown the bot.', ephemeral: true });
      }
      // Determine desired exit code (default 0)
      const exitCode = interaction.options.getInteger('code') ?? 0;
      // Validate exit code bounds
      if (exitCode < 0 || exitCode > 254) {
        return interaction.reply({ content: 'Exit code must be between 0 and 254 inclusive.', ephemeral: true });
      }
      // Acknowledge before shutting down
      await interaction.reply({ content: `Shutting down with exit code ${exitCode}...`, ephemeral: true });
      client.logger.info(
        `Shutdown initiated by owner ${interaction.user.tag} (${interaction.user.id}), exit code ${exitCode}`
      );
      // Destroy Discord client and exit process
      try {
        await client.destroy();
      } catch (err) {
        client.logger.error(`Error during client.destroy(): ${err}`);
      }
      process.exit(exitCode);
    }
  },
  // /status: admin-only, shows current client info
  {
    data: new SlashCommandBuilder()
      .setName('status')
      .setDescription('Show this bot client status and process info')
      .setDefaultMemberPermissions(PermissionFlagsBits.Administrator)
      .setDMPermission(false)
      .addBooleanOption(option =>
        option
          .setName('ephemeral')
          .setDescription('Whether the response should be ephemeral')
          .setRequired(false)
      ),
    async execute(interaction, client) {
      // Determine if response should be ephemeral (default true)
      const ephemeral = interaction.options.getBoolean('ephemeral') ?? true;
      await interaction.deferReply({ ephemeral });
      // Process metrics
      const uptimeSec = process.uptime();
      const hours = Math.floor(uptimeSec / 3600);
      const minutes = Math.floor((uptimeSec % 3600) / 60);
      const seconds = Math.floor(uptimeSec % 60);
      const uptime = `${hours}h ${minutes}m ${seconds}s`;
      const mem = process.memoryUsage();
      const toMB = bytes => (bytes / 1024 / 1024).toFixed(2);
      const memoryInfo = `RSS: ${toMB(mem.rss)} MB, Heap: ${toMB(mem.heapUsed)}/${toMB(mem.heapTotal)} MB`;
      const cpu = process.cpuUsage();
      const cpuInfo = `User: ${(cpu.user / 1000).toFixed(2)} ms, System: ${(cpu.system / 1000).toFixed(2)} ms`;
      const nodeVersion = process.version;
      const platform = `${process.platform} ${process.arch}`;
      // Client-specific stats
      const guildCount = client.guilds.cache.size;
      const userCount = client.guilds.cache.reduce((sum, g) => sum + (g.memberCount || 0), 0);
      const commandCount = client.commands.size;
      // List of loaded optional modules
      const loadedModules = client.modules ? Array.from(client.modules.keys()) : [];
      const lines = [
        `Client ID    : ${client.config.id}`,
        `Uptime       : ${uptime}`,
        `Memory       : ${memoryInfo}`,
        `CPU Usage    : ${cpuInfo}`,
        `Node.js      : ${nodeVersion}`,
        `Platform     : ${platform}`,
        `Guilds       : ${guildCount}`,
        `Users        : ${userCount}`,
        `Commands     : ${commandCount}`,
        `Modules      : ${loadedModules.length > 0 ? loadedModules.join(', ') : 'None'}`
      ];
      await interaction.editReply({ content: '```\n' + lines.join('\n') + '\n```' });
    }
  }
];

// Remove statusall command: not needed

// Enhance status command to list loaded modules
// (nothing else follows)
// Store all initialized clients for statusall
const botUtilsClients = [];

/**
 * Optional init hook; logs when the module is loaded and tracks clients
 * @param {import('discord.js').Client} client
 * @param {Object} clientConfig
 */
export async function init(client, clientConfig) {
  client.logger.info('botUtils module loaded');
  // Track this client instance and its config
  botUtilsClients.push({ client, clientConfig });
}