// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.server;

import org.litesoft.GWT.shared.service.*;
import org.litesoft.commonfoundation.base.*;
import org.litesoft.testplan.*;
import org.litesoft.util.*;

import com.google.gwt.user.server.rpc.*;

public class TestPlanServlet extends RemoteServiceServlet implements TestPlanService {
    private TestPlan mTestPlan = new TestPlan();

    @Override
    public TestPlanStepResponse get( TestPlanStepRequest pRequest ) {
        if ( pRequest != null ) {
            int zStep = pRequest.getStep();
            TestPlanStep[] zSteps = mTestPlan.getSteps();
            if ( zStep < 0 ) {
                throw new RuntimeException( "Negative Steps (" + zStep + ") are not supported" );
            }
            int zPrev = zStep - 1;
            if ( (0 <= zPrev) && (zPrev < zSteps.length) ) {
                TestPlanStep zPrevStep = deNull( zSteps[zPrev] );
                String zFrom = ConstrainTo.significantOrNull( zPrevStep.getFrom() );
                String zTo = ConstrainTo.significantOrNull( zPrevStep.getTo() );
                if ( (zFrom != null) && (zTo != null) ) {
                    Directories.moveAllFiles( zFrom, zTo );
                }
            }
            if ( zStep < zSteps.length ) {
                TestPlanStep zCurStep = deNull( zSteps[zStep] );
                int zNext = zStep + 1;
                TestPlanStep zNextStep = deNull( (zNext < zSteps.length) ? zSteps[zNext] : null );

                return new TestPlanStepResponse( zCurStep.getAction(), //
                                                 zCurStep.getNumber(), zCurStep.getSection(), zCurStep.getPostText(), //
                                                 zNextStep.getNumber(), zNextStep.getSection(), zNextStep.getPreText() );
            }
            RuntimeException ex = new RuntimeException( "No More Steps, Requested Step " + zStep + " of " + (zSteps.length - 1) );
            ex.printStackTrace();
            throw ex;
        }
        return null;
    }

    private TestPlanStep deNull( TestPlanStep zStep ) {
        return (zStep != null) ? zStep : new TestPlanStep( null, "", null, null, null );
    }
}