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package org.glassfish.loadbalancer.admin.cli.transform;

import org.glassfish.loadbalancer.admin.cli.reader.api.BaseReader;
import org.glassfish.loadbalancer.admin.cli.reader.api.ClusterReader;
import org.glassfish.loadbalancer.admin.cli.reader.api.InstanceReader;
import org.glassfish.loadbalancer.admin.cli.reader.api.WebModuleReader;
import org.glassfish.loadbalancer.admin.cli.reader.api.HealthCheckerReader;

import org.glassfish.loadbalancer.admin.cli.beans.Cluster;
import org.glassfish.loadbalancer.admin.cli.beans.WebModule;

/**
 * Provides transform capabilites for cluster
 *
 * @author Satish Viswanatham
 */
public class ClusterVisitor implements Visitor {

    // ------ CTOR ------
    public ClusterVisitor(Cluster c) {
        _c = c;
    }

    /**
     * Visit reader class 
     */
    @Override
    public void visit(BaseReader br) throws Exception {
        // FIXME, make as assert here about no class cast exception
		if (br instanceof ClusterReader) {
			ClusterReader cRdr = (ClusterReader) br;
			_c.setName(cRdr.getName());
			_c.setPolicy(cRdr.getLbPolicy());
			_c.setPolicyModule(cRdr.getLbPolicyModule());
			InstanceReader[] iRdrs = null;
			iRdrs = cRdr.getInstances();

			if ((iRdrs != null) && (iRdrs.length > 0)) {
				boolean[] values = new boolean[iRdrs.length];
				// XXX check if setting to true is required and is ok.
				for (int i = 0; i < iRdrs.length; i++) {
					values[i] = true;
				}
				_c.setInstance(values);
				for (int i = 0; i < iRdrs.length; i++) {
					iRdrs[i].accept(new InstanceVisitor(_c, i));
				}
			}

			HealthCheckerReader hcRdr = cRdr.getHealthChecker();

			if (hcRdr != null) {
				hcRdr.accept(new HealthCheckerVisitor(_c));
			}

			WebModuleReader[] wRdrs = cRdr.getWebModules();

			if ((wRdrs != null) && (wRdrs.length > 0)) {
				WebModule[] wMods = new WebModule[wRdrs.length];
				for (int i = 0; i < wRdrs.length; i++) {
					wMods[i] = new WebModule();
					wRdrs[i].accept(new WebModuleVisitor(wMods[i], _c));
				}
				_c.setWebModule(wMods);
			}
		}
    }
    //--- PRIVATE VARS ----
    Cluster _c = null;
}