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package org.glassfish.paas.gfplugin.cli;

import org.glassfish.api.ActionReport;
import org.glassfish.api.Param;
import org.glassfish.api.admin.AdminCommand;
import org.glassfish.api.admin.AdminCommandContext;
import org.glassfish.api.admin.CommandLock;
import org.glassfish.embeddable.CommandResult;
import org.glassfish.embeddable.CommandRunner;
import org.glassfish.virtualization.runtime.VirtualClusters;
import org.glassfish.virtualization.runtime.VirtualMachineLifecycle;
import org.glassfish.virtualization.spi.*;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.PerLookup;

/**
 * @author bhavanishankar@java.net
 */

@Service(name = "create-simple-service")
@Scoped(PerLookup.class)
@CommandLock(CommandLock.LockType.NONE)
public class CreateSimpleService implements AdminCommand {

    @Param(name = "templateid", optional = true)
    private String templateId;

    @Param(name = "servicename", primary = true)
    private String serviceName;

    @Inject(optional = true) // made it optional for non-virtual scenario to work
    private IAAS iaas;

    @Inject(optional = true) // made it optional for non-virtual scenario to work
    private TemplateRepository templateRepository;

    @Inject(optional = true) // made it optional for non-virtual scenario to work
    private VirtualClusters virtualClusters;

    @Inject
    private CommandRunner commandRunner;

    @Inject
    private VirtualMachineLifecycle vmLifecycle;

    public void execute(AdminCommandContext context) {
        ActionReport report = context.getActionReport();
        try {
            TemplateInstance matchingTemplate = null;
            for (TemplateInstance ti : templateRepository.all()) {
                if (ti.getConfig().getName().equals(templateId)) {
                    matchingTemplate = ti;
                    break;
                }
            }

            CommandResult cr = commandRunner.run("create-cluster", serviceName);
            System.out.println("Run command create-cluster " + serviceName +
                    ", command result [" + cr.getOutput() + "]");

            VirtualCluster vCluster = virtualClusters.byName(serviceName);
            PhasedFuture<AllocationPhase, VirtualMachine> future =
                    iaas.allocate(new AllocationConstraints(matchingTemplate, vCluster), null);
            VirtualMachine vm = future.get();

            System.out.println("VM is created successfully. IP address = " + vm.getAddress());
            System.out.println("VM state = " + vm.getMachine().getState());
            System.out.println("uname -a of the vm [" + vm.executeOn(new String[]{"uname", "-a"}) + "]");

            vmLifecycle.stop(vm);
            System.out.println("VM stopped");
            System.out.println("VM state = " + vm.getMachine().getState());

            vmLifecycle.start(vm);
            System.out.println("VM started. IP address = " + vm.getAddress());
            System.out.println("VM state = " + vm.getMachine().getState());
            System.out.println("uname -a of the vm [" + vm.executeOn(new String[]{"uname", "-a"}) + "]");

            report.setActionExitCode(ActionReport.ExitCode.SUCCESS);
            report.setMessage("Successfully create service [" + serviceName + "]");

        } catch (Exception ex) {
            report.setActionExitCode(ActionReport.ExitCode.FAILURE);
            report.setMessage("Unable to create service [" + serviceName + "]");
        }
    }
}