Update MongoDB connection settings and enhance debugging capabilities

backend/.env

@@ -0,0 +1,5 @@
+PORT=8080
+# MongoDB connection for backend
+CONNECTION_URI=mongodb://admin:adminpassword@192.168.0.197:27017/ludo?authSource=admin&replicaSet=rs0
+
+NODE_ENV="development"

backend/.env.example

@@ -1,3 +0,0 @@
-PORT=8080
-CONNECTION_URI=your_mongodb_connection_uri
-NODE_ENV="development"

backend/config/database.js

@@ -1,6 +1,11 @@
 module.exports = async function (mongoose) {
     try {
-        await mongoose.connect(process.env.CONNECTION_URI);
+        console.log('🔌 Attempting to connect with URI:', process.env.CONNECTION_URI);
+        await mongoose.connect(process.env.CONNECTION_URI, {
+            useNewUrlParser: true,
+            useUnifiedTopology: true,
+            directConnection: true,
+        });
         console.log('✅ MongoDB connected');
     } catch (err) {
         console.error('❌ MongoDB connection error:', err);

backend/config/session.js

@@ -1,10 +1,41 @@
 const session = require('express-session');
 const MongoDBStore = require('connect-mongodb-session')(session);
 
-const store = new MongoDBStore({
-    uri: process.env.CONNECTION_URI,
+console.log('📋 Session.js - CONNECTION_URI:', process.env.CONNECTION_URI);
+
+// Parse the connection URI to extract connection options
+const uriString = process.env.CONNECTION_URI;
+const uriUrl = new URL(uriString);
+
+// Extract individual components
+const baseUri = `${uriUrl.protocol}//${uriUrl.username}:${uriUrl.password}@${uriUrl.hostname}:${uriUrl.port}${uriUrl.pathname}`;
+const replicaSet = uriUrl.searchParams.get('replicaSet');
+const authSource = uriUrl.searchParams.get('authSource');
+
+console.log('📋 Base URI:', baseUri);
+console.log('📋 ReplicaSet:', replicaSet);
+console.log('📋 AuthSource:', authSource);
+
+// Build connection options with directConnection to bypass replica set discovery
+const connectionOptions = {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+    directConnection: true, // Force direct connection to specified server
+};
+
+if (authSource) {
+    connectionOptions.authSource = authSource;
+}
+
+const storeOptions = {
+    uri: baseUri,
     collection: 'sessions',
-});
+    connectionOptions: connectionOptions,
+};
+
+console.log('📋 Store options:', JSON.stringify(storeOptions, null, 2));
+
+const store = new MongoDBStore(storeOptions);
 const sessionMiddleware = session({
     store: store,
     credentials: true,

backend/server.js

@@ -3,11 +3,14 @@ const cors = require('cors');
 const path = require('path');
 const cookieParser = require('cookie-parser');
 const mongoose = require('mongoose');
-require('dotenv').config();
+require('dotenv').config({ path: path.join(__dirname, '.env') });
 const { sessionMiddleware } = require('./config/session');
 
 const PORT = process.env.PORT || 5000;
 
+console.log('🔍 Environment loaded from:', path.join(__dirname, '.env'));
+console.log('📍 Connection URI:', process.env.CONNECTION_URI);
+
 const app = express();
 
 app.use(cookieParser());

backend/test-connection-no-replica.js

@@ -0,0 +1,22 @@
+const mongodb = require('mongodb');
+require('dotenv').config({ path: require('path').join(__dirname, '.env') });
+
+// Try without replicaSet
+const uri = 'mongodb://admin:adminpassword@192.168.0.197:27017/ludo?authSource=admin';
+console.log('Testing without replicaSet:', uri);
+
+mongodb.MongoClient.connect(uri, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+    authSource: 'admin',
+    serverSelectionTimeoutMS: 5000,
+}, (err, client) => {
+    if (err) {
+        console.error('❌ Connection error:', err.message);
+        process.exit(1);
+    } else {
+        console.log('✅ Connected successfully!');
+        client.close();
+        process.exit(0);
+    }
+});

backend/test-connection.js

@@ -0,0 +1,27 @@
+const mongodb = require('mongodb');
+require('dotenv').config({ path: require('path').join(__dirname, '.env') });
+
+const uri = process.env.CONNECTION_URI;
+console.log('Testing with URI:', uri);
+
+const uriUrl = new URL(uri);
+console.log('URL components:');
+console.log('  hostname:', uriUrl.hostname);
+console.log('  port:', uriUrl.port);
+console.log('  pathname:', uriUrl.pathname);
+console.log('  searchParams:', Object.fromEntries(uriUrl.searchParams));
+
+// Try to connect directly
+mongodb.MongoClient.connect(uri, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+    replicaSet: 'rs0',
+    authSource: 'admin'
+}, (err, client) => {
+    if (err) {
+        console.error('Connection error:', err.message);
+    } else {
+        console.log('✅ Connected successfully!');
+        client.close();
+    }
+});

backend/test-mongo-debug.js

@@ -0,0 +1,23 @@
+process.env.DEBUG = 'mongodb:*';
+
+const mongodb = require('mongodb');
+
+const uri = 'mongodb://admin:adminpassword@192.168.0.197:27017/ludo?authSource=admin';
+console.log('Connecting to:', uri);
+
+const client = new mongodb.MongoClient(uri, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+    authSource: 'admin',
+    serverSelectionTimeoutMS: 3000,
+    loggerLevel: 'debug',
+});
+
+client.connect((err) => {
+    if (err) {
+        console.error('❌ Connection error:', err);
+    } else {
+        console.log('✅ Connected!');
+        client.close();
+    }
+});

backend/test-network.js

@@ -0,0 +1,34 @@
+const mongodb = require('mongodb');
+const net = require('net');
+const dns = require('dns').promises;
+
+async function test() {
+    // Test DNS resolution
+    console.log('Testing DNS resolution...');
+    try {
+        const res = await dns.resolve4('192.168.0.197');
+        console.log('DNS resolve4(192.168.0.197):', res);
+    } catch (e) {
+        console.log('DNS error:', e.message);
+    }
+
+    try {
+        const res = await dns.resolve4('mongo');
+        console.log('DNS resolve4(mongo):', res);
+    } catch (e) {
+        console.log('DNS mongo error:', e.message);
+    }
+
+    // Test direct socket connection
+    console.log('\nTesting direct TCP connection...');
+    const socket = net.createConnection(27017, '192.168.0.197');
+    socket.on('connect', () => {
+        console.log('✅ TCP connection successful to 192.168.0.197:27017');
+        socket.destroy();
+    });
+    socket.on('error', (err) => {
+        console.log('❌ TCP connection error:', err.message);
+    });
+}
+
+test();