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#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/applications-module.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("5GRegistrationAuthentication");

class UE {
public:
    UE(const std::string& ue_id, const std::string& auth_id) : id(ue_id), authId(auth_id) {}
    void SendRegistrationRequest();
    void ReceiveAuthenticationChallenge(const std::string& challenge);
    void SendAuthenticationResponse(const std::string& response);
    void ReceiveRegistrationAccept(const std::string& message);
    void SendRegistrationComplete();

private:
    std::string id;
    std::string authId;
};

class RAN {
public:
    void ForwardRegistrationRequest(const std::string& request);
    void ForwardAuthenticationResponse(const std::string& response);
    void ForwardRegistrationAccept(const std::string& message);
};

class AMF {
public:
    void ReceiveRegistrationRequest(const std::string& request);
    void RequestAuthentication(const std::string& ueId);
    void ReceiveAuthenticationResponse(const std::string& response);
    void VerifyAuthentication(const std::string& response);
    void SendRegistrationAccept();

private:
    AUSF ausf;
};

class AUSF {
public:
    void AuthenticateRequest(const std::string& ueId);
    void SendAuthenticationChallenge(const std::string& challenge);
};

void UE::SendRegistrationRequest() {
    NS_LOG_INFO("UE to RAN: Registration Request");
    // Implementation to send registration request
}

void UE::ReceiveAuthenticationChallenge(const std::string& challenge) {
    NS_LOG_INFO("AMF to UE: Authentication Challenge: " + challenge);
    // UE processes the challenge
    SendAuthenticationResponse("Auth Response from UE");
}

void UE::SendAuthenticationResponse(const std::string& response) {
    NS_LOG_INFO("UE to AMF: " + response);
    // Implementation to send authentication response
}

void UE::ReceiveRegistrationAccept(const std::string& message) {
    NS_LOG_INFO("AMF to UE: Registration Accept: " + message);
    // UE processes the registration accept message
    SendRegistrationComplete();
}

void UE::SendRegistrationComplete() {
    NS_LOG_INFO("UE to AMF: Registration Complete");
    // Implementation to send registration complete message
}

void RAN::ForwardRegistrationRequest(const std::string& request) {
    NS_LOG_INFO("RAN to AMF: " + request);
    // Forward to AMF
}

void RAN::ForwardAuthenticationResponse(const std::string& response) {
    NS_LOG_INFO("RAN to AMF: " + response);
    // Forward response to AMF
}

void RAN::ForwardRegistrationAccept(const std::string& message) {
    NS_LOG_INFO("RAN to UE: Registration Accept: " + message);
    // Forward registration accept message to UE
}

void AMF::ReceiveRegistrationRequest(const std::string& request) {
    NS_LOG_INFO("RAN to AMF: " + request);
    // AMF processes the registration request
    RequestAuthentication("UE_1");
}

void AMF::RequestAuthentication(const std::string& ueId) {
    NS_LOG_INFO("AMF to AUSF: Authentication Request for " + ueId);
    // Request authentication from AUSF
    ausf.AuthenticateRequest(ueId);
}

void AMF::ReceiveAuthenticationResponse(const std::string& response) {
    NS_LOG_INFO("UE to AMF: " + response);
    // Process the authentication response
    VerifyAuthentication(response);
}

void AMF::VerifyAuthentication(const std::string& response) {
    NS_LOG_INFO("AMF: Authentication Success");
    // Verification logic
    SendRegistrationAccept();
}

void AMF::SendRegistrationAccept() {
    NS_LOG_INFO("AMF to RAN: Registration Accept");
    // Implementation to send registration accept
}

void AUSF::AuthenticateRequest(const std::string& ueId) {
    NS_LOG_INFO("AUSF to AMF: Authentication Request for " + ueId);
    // Authenticate the request
    SendAuthenticationChallenge("Challenge for UE");
}

void AUSF::SendAuthenticationChallenge(const std::string& challenge) {
    NS_LOG_INFO("AUSF to AMF: Authentication Challenge: " + challenge);
    // Send challenge to AMF
}

int main(int argc, char *argv[]) {
    LogComponentEnable("5GRegistrationAuthentication", LOG_LEVEL_INFO);

    // Simulation setup
    UE ue("UE_1", "auth123");
    RAN ran;
    AMF amf;
    AUSF ausf;

    ue.SendRegistrationRequest();
    ran.ForwardRegistrationRequest("Registration Request");
    amf.ReceiveRegistrationRequest("Registration Request from UE");
    ausf.AuthenticateRequest("UE_1");
    ausf.SendAuthenticationChallenge("Authentication Challenge");
    ue.ReceiveAuthenticationChallenge("Authentication Challenge");
    ran.ForwardAuthenticationResponse("Auth Response from UE");
    amf.ReceiveAuthenticationResponse("Auth Response from UE");
    amf.SendRegistrationAccept();
    ran.ForwardRegistrationAccept("Registration Accept");
    ue.ReceiveRegistrationAccept("Registration Accept");

    Simulator::Run();
    Simulator::Destroy();

    return 0;
}