import org.spongepowered.api.Sponge;
import org.spongepowered.api.command.CommandResult;
import org.spongepowered.api.command.args.GenericArguments;
import org.spongepowered.api.command.spec.CommandSpec;
import org.spongepowered.api.event.Listener;
import org.spongepowered.api.event.game.GameRegistryEvent;
import org.spongepowered.api.event.game.state.GameConstructionEvent;
import org.spongepowered.api.event.game.state.GameInitializationEvent;
import org.spongepowered.api.event.game.state.GameStartedServerEvent;
import org.spongepowered.api.plugin.Plugin;
import org.spongepowered.api.text.Text;

import java.util.Optional;

@Plugin(id = "myplugin")
public class MyPlugin {

    @Listener
    public void onConstruct(GameConstructionEvent event) {
        // We need to register the catalog module so that Sponge knows how to retrieve our titles.
        // CatalogRegistryModules are the backing storage for every CatalogType registered to the GameRegistry.
        Sponge.getRegistry().registerModule(Title.class, new TitleCatalogModule());
    }

    /**
     * NOTE:
     * This event is only called for your catalog types when the catalog modules that you register
     * implement AdditionalCatalogRegistryModule (and not just CatalogRegistryModule)
     */
    @Listener
    public void onRegisterTitles(GameRegistryEvent.Register<Title> event) {
        // Lets register some extra titles.
        event.register(new Title("explorer", "Explorer", () -> "[Explorer]"));
    }

    @Listener
    public void onInit(GameInitializationEvent event) {
        // Since our Title class implements CatalogType, we get GenericArguments.catalogedElement for free!
        CommandSpec myDebug = CommandSpec.builder()
                .permission("myplugin.debug")
                .arguments(GenericArguments.catalogedElement(Text.of("title"), Title.class))
                .executor((src, args) -> {
                    Title title = args.<Title>getOne("title").get();

                    src.sendMessage(Text.of("The given title is " + title.getTitleSupplier().get()));

                    return CommandResult.success();
                })
                .build();

        Sponge.getCommandManager().register(this, myDebug, "mydebug");
    }

    @Listener
    public void onStarted(GameStartedServerEvent event) {
        // To fetch a CatalogType (Title in our case) from the registry is as simple as:
        Optional<Title> ownerTitle = Sponge.getRegistry().getType(Title.class, "owner");

        if (ownerTitle.isPresent()) {
            // owner is a registered title!
        } else {
            // we couldn't find it :(
        }

        // To get all of our registered titles:
        for (Title title : Sponge.getRegistry().getAllOf(Title.class)) {
            String supplied = title.getTitleSupplier().get();
        }
    }
}