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package net.sf.cuf.debug;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Field;
import java.util.List;

import org.w3c.dom.Node;

import net.sf.cuf.state.SimpleStateExpression;
import net.sf.cuf.state.State;
import net.sf.cuf.state.StateExpression;


public class StateInfo
{

    private String mId;

    private Node mStateNode;

    private State mState;

    public StateInfo(final String pId, final State pState)
    {
        this(pId, null, pState);
    }

    public StateInfo(final String pId, final Node pStateNode, final State pState)
    {
        mId = pId;
        mStateNode = pStateNode;
        mState = pState;
    }

    public String getId()
    {
        return mId;
    }

    public Node getStateNode()
    {
        return mStateNode;
    }

    public State getState()
    {
        return mState;
    }

    public String getDetails()
    {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        getDetails(pw, "", mState);
        pw.close();
        return sw.toString();
    }

    private void getDetails(final PrintWriter pOut, final String pIndent, final State pState)
    {
        if (pState instanceof StateExpression)
        {
            pOut.println(pIndent + "Expression " + pState.getName() + ": " + getIniEnString(pState));
            if (pState instanceof SimpleStateExpression)
            {
                SimpleStateExpression expression = (SimpleStateExpression) pState;
                List states = (List) getPrivateValue(expression, "mStates");
                List inverts = (List) getPrivateValue(expression, "mInverts");
                List operations = (List) getPrivateValue(expression, "mOperations");
                for (int i = 0; i < states.size(); i++)
                {
                    pOut.println(pIndent + "  " + operations.get(i) + (Boolean.TRUE.equals(inverts.get(i)) ? " not" : ""));
                    getDetails(pOut, pIndent + "    ", (State) states.get(i));
                }
            }
        }
        else
        {
            pOut.println(pIndent + "State " + pState.getName() + ": " + getIniEnString(pState));
        }
    }

    private static Object getPrivateValue(final Object pObj, final String pAttr)
    {
        try
        {
            Field field = pObj.getClass().getDeclaredField(pAttr);
            field.setAccessible(true);
            Object result = field.get(pObj);
            field.setAccessible(false);
            return result;
        }
        catch (Exception e)
        {
            e.printStackTrace();
            return null;
        }

    }

    private static String getIniEnString(final State pState)
    {
        return (pState.isInitialized() ? "initialized" : "not initialized") + (pState.isEnabled() ? " enabled" : " disabled");
    }

}