const fs = require('node:fs');
const path = require('node:path')
const {Client, Events, GatewayIntentBits, Collection, InteractionResponse } = require('discord.js');
require('dotenv').config();
const { connectDB, closeDB, pool } = require('./db')
const { initStatusCache } = require('./events/ready/db-status');

const client = new Client({ intents: [GatewayIntentBits.Guilds, GatewayIntentBits.GuildMembers, GatewayIntentBits.GuildMessages, GatewayIntentBits.MessageContent, GatewayIntentBits.GuildModeration, GatewayIntentBits.GuildVoiceStates, GatewayIntentBits.GuildPresences ] });

client.commands= new Collection();

const foldersPath = path.join(__dirname, 'commands');
const commandFolders = fs.readdirSync(foldersPath);

for (const folder of commandFolders) {
	const commandsPath = path.join(foldersPath, folder);
	const commandFiles = fs.readdirSync(commandsPath).filter(file => file.endsWith('.js'));
	for (const file of commandFiles) {
		const filePath = path.join(commandsPath, file);
		const command = require(filePath);
		// Set a new item in the Collection with the key as the command name and the value as the exported module
		if ('data' in command && 'execute' in command) {
			client.commands.set(command.data.name, command);
		} else {
			console.log(`[WARNING] The command at ${filePath} is missing a required "data" or "execute" property.`);
		}
	}
}

function loadEvents(dir, client) {
    const files = fs.readdirSync(dir, { withFileTypes: true });

    for (const file of files) {
        const fullPath = path.join(dir, file.name);

        if (file.isDirectory()) {
            // Recursively load events from subdirectories
            loadEvents(fullPath, client);
        } else if (file.isFile() && file.name.endsWith('.js')) {
            // Load the event file
            const event = require(fullPath);

            if (event.once) {
                client.once(event.name, (...args) => event.execute(...args));
            } else {
                client.on(event.name, (...args) => event.execute(...args));
            }

            //console.log(`Loaded event: ${event.name}`);
        }
    }
}

// Call the function to load all events
const eventsPath = path.join(__dirname, 'events');
loadEvents(eventsPath, client);

// ---- Global guards (super helpful in prod)
process.on('unhandledRejection', (err) => {
  console.error('UNHANDLED REJECTION:', err);
});
process.on('uncaughtException', (err) => {
  console.error('UNCAUGHT EXCEPTION:', err);
});

// Optional: observe REST & rate limits
client.rest.on('rateLimited', (info) => {
  console.warn('[REST rateLimit]', info);
});


// ---- Boot sequence
(async () => {
  try {
    await connectDB();                    // verify DB first
	await initStatusCache(pool);
    await client.login(process.env.TOKEN);
    //console.log(`✅ Logged in as ${client.user?.tag}`);
  } catch (err) {
    console.error('Startup error:', err);
    // ensure we close DB if login fails
    try { await closeDB(); } catch {}
    process.exit(1);
  }
})();


async function shutdown(signal) {
  console.log(`${signal} received, shutting down…`);
  try {
    if (client.isReady()) {
      await client.destroy();             // closes WS cleanly
    }
  } catch (e) {
    console.error('Error during client.destroy():', e);
  }

  try {
    await closeDB();                      // pool.end()
  } catch (e) {
    console.error('Error during DB close:', e);
  }

  process.exit(0);
}

process.on('SIGINT',  () => shutdown('SIGINT'));
process.on('SIGTERM', () => shutdown('SIGTERM'));