server.js

require('dotenv').config();
const express = require('express');
const http = require('http');
const { Server } = require('socket.io');
const path = require('path');

require('./config/db'); // Self-initializes the DB connection
const { pruneOldDMs } = require('./models/messageModel');
const uploadRoutes = require('./routes/uploadRoutes');
const socketManager = require('./sockets/socketManager');

const app = express();
const server = http.createServer(app);
const io = new Server(server);

// Middleware: Serve React build (production frontend)
app.use(express.static(path.join(__dirname, 'client', 'dist')));

// Serve new uploads (uploads/images/, uploads/audio/)
app.use('/uploads', express.static(path.join(__dirname, 'uploads')));

// Legacy: serve old uploads from public/uploads/ (backward compat)
app.use('/uploads', express.static(path.join(__dirname, 'public', 'uploads')));

// Middleware: Mount HTTP Routes for files
app.use('/', uploadRoutes);

// Pass the raw io instance into our socket manager
socketManager(io);

// SPA fallback: serve React app for any unmatched routes
app.get('/{*splat}', (req, res) => {
    res.sendFile(path.join(__dirname, 'client', 'dist', 'index.html'));
});

// Run 7-day DM pruning on startup and schedule every 24 hours
pruneOldDMs();
setInterval(() => {
    pruneOldDMs();
}, 24 * 60 * 60 * 1000);

const PORT = process.env.PORT || 3000;
if (require.main === module) {
    server.listen(PORT, '0.0.0.0', () => {
        console.log(`[SYS] Clean Architecture Server running on port ${PORT}`);
    });
}

module.exports = { app, server, io };