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

/* Implementation file for the VCROSS Cognitive Radio public API defined in
 * include/libvtcross.h.
 *
 * MORE INFO HERE
 */

#include "vtcross/libvtcross.h"
#include "vtcross/common.h"
#include "vtcross/debug.h"

uint32_t
ConnectToRemoteComponent()
{
   	uint32_t socket; 
    socket = ClientSocket("localhost", "40000");
    
    return socket;
}

/* Given a certain set of observables, ask the radio to find the optimum radio
 * parameters and return them. 
 *
 * TODO I'm a little confused about this function... why would anyone need to
 * use this?  Shouldn't this be internal to the radio operation? 
 */
Parameter* GetOptimalParameters(Observable *radioObservables, uint32_t numObservables) {
    uint32_t i,socketfd,numParameters;
    char var[50];
    char counter[55];
	char buffer[256];

    socketfd = ConnectToRemoteComponent();
    SendMessage(socketfd,"request_optimization");

    /* Get number of observables to send.  This information needs to be 
     * sent to the Cognitive Radio Shell also.   
     */

    // Send Observables
    sprintf(counter,"%i",numObservables);
    SendMessage(socketfd,counter);
    for(i = 0; i < numObservables; i++) {
        SendMessage(socketfd,radioObservables[i].name.c_str());
        sprintf(var,"%f",radioObservables[i].value);
        SendMessage(socketfd,var);	
    }

    /* Receive Set of Parameters */
    memset(buffer, 0, 256);
    ReadMessage(socketfd, buffer);
    numParameters = atoi(buffer);
    Parameter * pList = new Parameter[numParameters];
    
    for(size_t i = 0; i < numParameters; i++) {
        memset(buffer, 0, 256);
        ReadMessage(socketfd, buffer);
        pList[i].name = std::string(buffer);
        
		memset(buffer, 0, 256);
        ReadMessage(socketfd, buffer);
        pList[i].value = atof(buffer);
    }   

    return pList;
}