/* Virginia Tech Cognitive Radio Open Source Systems
 * Virginia Tech, 2009
 *
 * LICENSE INFORMATION GOES HERE
 */

/* DESCRIPTION OF FILE.
 */


#include <cstdlib>
#include <cstring>
#include <stdint.h>

#include "vtcross/common.h"
#include "vtcross/components.h"
#include "vtcross/containers.h"
#include "vtcross/debug.h"
#include "vtcross/error.h"
#include "vtcross/socketcomm.h"


ServiceManagementLayer::ServiceManagementLayer()
{
    LOG("Creating Service Management Layer.\n");
    shellSocketFD = -1;
    LoadConfiguration();
}


ServiceManagementLayer::~ServiceManagementLayer()
{
}


ServiceManagementLayer::ServiceManagementLayer(const char* serverName, \
        const char* serverPort)
{
    LOG("Creating Service Management Layer.\n");

    ConnectToShell(serverName, serverPort);

    LoadConfiguration();
}


void 
ServiceManagementLayer::SendComponentType()
{
    SendMessage(shellSocketFD, "response_sml");
    LOG("SML responded to GetRemoteComponentType query.\n");
}


void 
ServiceManagementLayer::ConnectToShell(const char* serverName, \
        const char* serverPort)
{
    shellSocketFD = ClientSocket(serverName, serverPort);

    RegisterComponent();
}


void 
ServiceManagementLayer::WaitForSignal()
{
    char buffer[256];

    while(true) {
        memset(buffer, 0, 256);
       
        ReadMessage(shellSocketFD, buffer);

        // TODO
        // If we send integer op codes rather than strings, this process will be
        // MUCH faster since instead of donig string compares we can simply
        // switch on the integer value...
        if(strcmp(buffer, "register_service") == 0) {
            if(strcmp(buffer, "policy_geo") == 0) {
            }
            else if(strcmp(buffer, "policy_time") == 0) {
            }
            else if(strcmp(buffer, "policy_spectrum") == 0) {
            }
            else if(strcmp(buffer, "policy_spacial") == 0) {
            }
        }
        else if(strcmp(buffer, "deregister_service") == 0) {
            if(strcmp(buffer, "policy_geo") == 0) {
            }
            else if(strcmp(buffer, "policy_time") == 0) {
            }
            else if(strcmp(buffer, "policy_spectrum") == 0) {
            }
            else if(strcmp(buffer, "policy_spacial") == 0) {
            }
        }
        else if(strcmp(buffer, "query_component_type") == 0) {
            SendComponentType();
        }
        else if(strcmp(buffer, "reset_sml") == 0) {
            Reset();
        }
        else if(strcmp(buffer, "shutdown_sml") == 0) {
            Shutdown();
        }
    }
}


void 
ServiceManagementLayer::Shutdown()
{
    DeregisterComponent();
}


void 
ServiceManagementLayer::Reset()
{
    DeregisterComponent();
    LoadConfiguration();
}


void 
ServiceManagementLayer::RegisterComponent()
{
    SendMessage(shellSocketFD, "register_sml");
    LOG("ServiceManagementLayer:: Registration message sent.\n");
}


void 
ServiceManagementLayer::DeregisterComponent()
{
    SendMessage(shellSocketFD, "deregister_sml");
    LOG("ServiceManagementLayer:: Deregistration message sent.\n");

    shutdown(shellSocketFD, 2);
    close(shellSocketFD);
    shellSocketFD = -1;
    LOG("ServiceManagementLayer:: Shell socket closed.\n");
}


void 
ServiceManagementLayer::TransferRadioConfiguration()
{
}


void 
ServiceManagementLayer::TransferExperience()
{
}


void 
ServiceManagementLayer::ReceiveServices()
{
}


void 
ServiceManagementLayer::SetActiveMission()
{
}


void 
ServiceManagementLayer::ListServices()
{
}


void 
ServiceManagementLayer::ReloadConfiguration()
{
    LOG("ServiceManagementLayer:: Reloading Configuration.\n");
}


void 
ServiceManagementLayer::LoadConfiguration()
{
    LOG("ServiceManagementLayer:: Loading Configuration.\n");
}