package envoy.client.data;

import javafx.stage.Stage;

import envoy.client.net.*;
import envoy.client.ui.SceneContext;

/**
 * Provides access to commonly used objects.
 *
 * @author Leon Hofmeister
 * @since Envoy Client v0.2-beta
 */
public class Context {

	private WriteProxy		writeProxy;
	private LocalDB			localDB;
	private Stage			stage;
	private SceneContext	sceneContext;

	private final Client client = new Client();

	private static final Context instance = new Context();

	private Context() {}

	/**
	 * @return the instance of {@code Context} used throughout Envoy
	 * @since Envoy Client v0.2-beta
	 */
	public static Context getInstance() { return instance; }

	/**
	 * Initializes the write proxy given that {@code localDB} is initialized.
	 *
	 * @since Envoy Client v0.2-beta
	 */
	public void initWriteProxy() {
		if (localDB == null)
			throw new IllegalStateException("The LocalDB has to be initialized!");
		writeProxy = new WriteProxy(client, localDB);
	}

	/**
	 * @return the localDB
	 * @since Envoy Client v0.2-beta
	 */
	public LocalDB getLocalDB() { return localDB; }

	/**
	 * @param localDB the localDB to set
	 * @since Envoy Client v0.2-beta
	 */
	public void setLocalDB(LocalDB localDB) { this.localDB = localDB; }

	/**
	 * @return the sceneContext
	 * @since Envoy Client v0.2-beta
	 */
	public SceneContext getSceneContext() { return sceneContext; }

	/**
	 * @param sceneContext the sceneContext to set. Additionally sets the stage.
	 * @since Envoy Client v0.2-beta
	 */
	public void setSceneContext(SceneContext sceneContext) {
		this.sceneContext	= sceneContext;
		stage				= sceneContext.getStage();
	}

	/**
	 * @return the client
	 * @since Envoy Client v0.2-beta
	 */
	public Client getClient() { return client; }

	/**
	 * @return the writeProxy
	 * @since Envoy Client v0.2-beta
	 */
	public WriteProxy getWriteProxy() { return writeProxy; }

	/**
	 * @return the stage
	 * @since Envoy Client v0.2-beta
	 */
	public Stage getStage() { return stage; }

	/**
	 * @param stage the stage to set
	 * @since Envoy Client v0.2-beta
	 */
	public void setStage(Stage stage) { this.stage = stage; }
}