/**
 * Class for storing a snapshot of the global state of the swarm.
 * Useful for passing data between simulation and rendering threads.
 * Also useful for serializing agent behavior for later analysis.
 * @author     Michael Schuresko
 * @version    %I%, %G%
 * @since      1.0
 */

public class SwarmState
{

    double [] m_arrLfPositions;
    StateBundle [] m_arrStates;
    IAgent m_agent;
    double m_lfTime;
    CommGraph m_commGraph;

    public double [] accessPositions() { return m_arrLfPositions; }
    public StateBundle [] accessStates() { return m_arrStates; }
    public IAgent accessAgent() { return m_agent; }
    public double getTime() { return m_lfTime; }
    public CommGraph getGraph() { return m_commGraph; }

    protected SwarmState() {
	m_commGraph = null;
	m_arrLfPositions = null;
	m_arrStates = null;
	m_agent = null;
	m_lfTime = 0.0;
    }

    boolean checkPosValid() {
    	boolean bResult = false;
    	if(m_arrLfPositions == null) {
    		return false;
    	}
    	int nNumAgents = m_arrLfPositions.length/2;
    	for(int i = 0; i < nNumAgents -1; ++i) {
    		bResult = bResult ||
    			(Math.abs(m_arrLfPositions[2*i] - m_arrLfPositions[2*i+2]) > 
    			MathUtils.lfEps);
    	}
    	if(bResult == false) {
    		System.out.println("getting coincident pts");
    	}
    	return bResult;
    }
    
    /**
     * Constructor
     */
    public SwarmState(double [] arrLfPositions,
		      StateBundle [] arrStates,
		      IAgent agent, double lfTime,
		      CommGraph graph)
    {
	populate(arrLfPositions, arrStates, agent, lfTime, graph);
    }

    /**
     * Copy  constructor.
     */
    public SwarmState(SwarmState src) 
    {
    	if(src != null) {
    		populate(src.m_arrLfPositions, src.m_arrStates, src.m_agent, 
    				m_lfTime, src.m_commGraph);
    	}
    }

    void populate(double [] arrLfPositions,
		  StateBundle [] arrStates,
		  IAgent agent, double lfTime, CommGraph graph)
    {
    if(arrStates != null) {
    	m_arrStates = new StateBundle[arrStates.length];
		for(int i = 0; i < m_arrStates.length; ++i)
		{
			if(arrStates[i] != null) {
				m_arrStates[i] = arrStates[i].makeCopy();
			}
		}
    } else {
    	m_arrStates = null;
    }
    	
	
	if(agent != null) {
		m_agent = agent.makeCopy();
	} else {
		m_agent = null;
	}
	if(arrLfPositions != null) {
		m_arrLfPositions = new double[arrLfPositions.length];
		for(int i = 0; i < m_arrLfPositions.length; ++i)
	    	{
			m_arrLfPositions[i] = arrLfPositions[i];
	    	}
	} else 
	{
		m_arrLfPositions = null;
	}
	m_lfTime = lfTime;
	m_commGraph = graph;
	checkPosValid();
    }
}