/**
 *                                                                            
 * Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 *                                                                            
 * All rights reserved. This program and the accompanying materials           
 * are made available under the terms of the Eclipse Public License v1.0       
 * which accompanies this distribution, and is available at                  
 * http://www.eclipse.org/legal/epl-v10.html                                 
 *                                                                            
 * Contributors:   
 * Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation 
 */
package org.eclipse.osbp.i18n.common;

import java.util.Locale;

import org.eclipse.osbp.runtime.common.dispose.AbstractDisposable;
import org.eclipse.osbp.runtime.common.i18n.II18nService;
import org.eclipse.osbp.ui.api.metadata.IDSLMetadataService;

/**
 * A simple I18n service implementation.
 */
public class OSI18nService extends AbstractDisposable implements II18nService {
	private IDSLMetadataService dslMetadataService;
	private II18nService i18nService;

	public OSI18nService(IDSLMetadataService dslMetadataService, II18nService i18nService) {
		super();
		this.dslMetadataService = dslMetadataService;
		this.i18nService = i18nService;
	}

	@Override
	public String getValue(String i18nKey, Locale locale) {
		String[] splitI18nKey = i18nKey.split("\\.");
		StringBuffer translation = new StringBuffer();
		int bracketsToClose = 0;
		// LIFO - Therefore starting from the last to the first
		for (int i = splitI18nKey.length - 1; i > -1; i--) {
			String translationTemp = dslMetadataService.translate(locale.toLanguageTag(), splitI18nKey[i]);
			if (translationTemp == null || translationTemp.isEmpty() || translationTemp.equals(i18nKey)) {
				return null;
			}
			// Nested properties will be translated individually and put together
			if (i < splitI18nKey.length - 1) {
				translation.append("(");
				bracketsToClose++;
			}
			translation.append(translationTemp);
		}
		for (int i = 0; i < bracketsToClose; i++) {
			translation.append(")");
		}
		return translation.toString();
	}

	@Override
	protected void internalDispose() {
		// nothing to do
	}
}