/*-
 * ============LICENSE_START=======================================================
 * ONAP-PAP-REST
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */
package org.onap.policy.pap.xacml.rest;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import javax.annotation.PostConstruct;
import javax.sql.DataSource;

import org.apache.tomcat.dbcp.dbcp2.BasicDataSource;
import org.hibernate.SessionFactory;
import org.onap.policy.common.logging.flexlogger.FlexLogger;
import org.onap.policy.common.logging.flexlogger.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.orm.hibernate4.LocalSessionFactoryBuilder;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
@EnableWebMvc
@EnableTransactionManagement
@ComponentScan(basePackages = { "org.onap.*", "com.*" })
public class PAPRestConfig extends WebMvcConfigurerAdapter {
	private static final Logger LOGGER	= FlexLogger.getLogger(PAPRestConfig.class);
	
	private static String dbDriver = null;
	private static String dbUrl = null;
	private static String dbUserName = null;
	private static String dbPassword = null;
	
	@PostConstruct
	public void init(){
		Properties prop = new Properties();
		InputStream input = null;
		try {
			input = new FileInputStream("xacml.pap.properties");
			// load a properties file
			prop.load(input);
			setDbDriver(prop.getProperty("javax.persistence.jdbc.driver"));
			setDbUrl(prop.getProperty("javax.persistence.jdbc.url"));
			setDbUserName(prop.getProperty("javax.persistence.jdbc.user"));
			setDbPassword(prop.getProperty("javax.persistence.jdbc.password"));
		}catch(Exception e){
			LOGGER.error("Exception Occured while loading properties file"+e);
		}finally{
			if(input != null){
				try {
					input.close();
				} catch (IOException e) {
					LOGGER.error("Exception Occured while clsoing the stream"+e);
				}
			}
		}
	}
	
	@Bean(name = "dataSource")
	public DataSource getDataSource() {
	    BasicDataSource dataSource = new BasicDataSource();
	    dataSource.setDriverClassName(PAPRestConfig.getDbDriver());
	    dataSource.setUrl(PAPRestConfig.getDbUrl());
	    dataSource.setUsername(PAPRestConfig.getDbUserName());
	    dataSource.setPassword(PAPRestConfig.getDbPassword());
	    return dataSource;
	}
	
	@Autowired
	@Bean(name = "sessionFactory")
	public SessionFactory getSessionFactory(DataSource dataSource) {
	    LocalSessionFactoryBuilder sessionBuilder = new LocalSessionFactoryBuilder(dataSource);
	    sessionBuilder.scanPackages("org.onap.*", "com.*");
	    sessionBuilder.addProperties(getHibernateProperties());
	    return sessionBuilder.buildSessionFactory();
	}
	
	private Properties getHibernateProperties() {
		Properties properties = new Properties();
		properties.put("hibernate.show_sql", "true");
		properties.put("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
		return properties;
	}
	
	@Autowired
	@Bean(name = "transactionManager")
	public HibernateTransactionManager getTransactionManager(SessionFactory sessionFactory) {
		return new HibernateTransactionManager(sessionFactory);
	}

	public static String getDbDriver() {
		return dbDriver;
	}

	public static void setDbDriver(String dbDriver) {
		PAPRestConfig.dbDriver = dbDriver;
	}

	public static String getDbUrl() {
		return dbUrl;
	}

	public static void setDbUrl(String dbUrl) {
		PAPRestConfig.dbUrl = dbUrl;
	}

	public static String getDbUserName() {
		return dbUserName;
	}

	public static void setDbUserName(String dbUserName) {
		PAPRestConfig.dbUserName = dbUserName;
	}

	public static String getDbPassword() {
		return dbPassword;
	}

	public static void setDbPassword(String dbPassword) {
		PAPRestConfig.dbPassword = dbPassword;
	}
	
}