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#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/log.h"
 
using namespace ns3;
 
NS_LOG_COMPONENT_DEFINE("NasSignalingSecurity");
 
class NasSecurity {
public:
    NasSecurity() {
        NS_LOG_INFO("NAS Security Module Initialized.");
    }
 
    // Simulates the encryption of a message
    std::string EncryptMessage(const std::string& message) {
        return "Encrypted(" + message + ")";
    }
 
    // Simulates the decryption of a message
    std::string DecryptMessage(const std::string& message) {
        return message.substr(10, message.size() - 11);
    }
 
    // Simulates checking the integrity of a message
    bool CheckIntegrity(const std::string& message) {
        // Placeholder for integrity check logic
        return true;
    }
 
    // Simulates sending a secure message
    void SendSecureMessage(const std::string& message, Ptr<Node> recipient) {
        std::string encryptedMessage = EncryptMessage(message);
        if (CheckIntegrity(encryptedMessage)) {
            NS_LOG_INFO("Message sent securely: " + encryptedMessage);
        } else {
            NS_LOG_ERROR("Integrity check failed!");
        }
    }
 
    // Simulates receiving a secure message
    void ReceiveSecureMessage(const std::string& encryptedMessage) {
        if (CheckIntegrity(encryptedMessage)) {
            std::string decryptedMessage = DecryptMessage(encryptedMessage);
            NS_LOG_INFO("Secure message received and decrypted: " + decryptedMessage);
        } else {
            NS_LOG_ERROR("Received message failed integrity check.");
        }
    }
};
 
int main(int argc, char *argv[]) {
    CommandLine cmd;
    cmd.Parse(argc, argv);
 
    Ptr<Node> node1 = CreateObject<Node>();
    Ptr<Node> node2 = CreateObject<Node>();
 
    NasSecurity nasSecurity;
 
    // Simulate sending a secure message
    std::string message = "Hello, secure world!";
    nasSecurity.SendSecureMessage(message, node2);
 
    // Simulate receiving a secure message
    std::string encryptedMessage = nasSecurity.EncryptMessage(message);
    nasSecurity.ReceiveSecureMessage(encryptedMessage);
 
    return 0;
}