//    Chromis POS  - The New Face of Open Source POS
//    Copyright (c) (c) 2015-2016
//    http://www.chromis.co.uk
//
//    This file is part of Chromis POS
//
//     Chromis POS is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    Chromis POS is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Chromis POS.  If not, see <http://www.gnu.org/licenses/>.

package uk.chromis.pos.forms;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;
import uk.chromis.basic.BasicException;
import uk.chromis.data.loader.Session;
import uk.chromis.pos.util.AltEncrypter;

/**
 *
 * @author adrianromero
 */
public class AppViewConnection {
    
    /** Creates a new instance of AppViewConnection */
    private AppViewConnection() {
    }
    
    /**
     *
     * @param props
     * @return
     * @throws BasicException
     */
    public static Session createSession(AppProperties props) throws BasicException {               
        return createSession();
    }

    
    public static Session createSession() throws BasicException {               
        try{
            if (isJavaWebStart()) {
                Class.forName(AppConfig.getInstance().getProperty("db.driver"), true, Thread.currentThread().getContextClassLoader());
            } else {
                ClassLoader cloader = new URLClassLoader(new URL[] {new File(AppConfig.getInstance().getProperty("db.driverlib")).toURI().toURL()});
                DriverManager.registerDriver(new DriverWrapper((Driver) Class.forName(AppConfig.getInstance().getProperty("db.driver"), true, cloader).newInstance()));
            }

            String sDBUser = AppConfig.getInstance().getProperty("db.user");
            String sDBPassword = AppConfig.getInstance().getProperty("db.password");        
            if (sDBUser != null && sDBPassword != null && sDBPassword.startsWith("crypt:")) {
                // the password is encrypted
                AltEncrypter cypher = new AltEncrypter("cypherkey" + sDBUser);
                sDBPassword = cypher.decrypt(sDBPassword.substring(6));
            }   
             return new Session(AppConfig.getInstance().getProperty("db.URL"), sDBUser,sDBPassword);     

        } catch (InstantiationException | IllegalAccessException | MalformedURLException | ClassNotFoundException e) {
            throw new BasicException(AppLocal.getIntString("message.databasedrivererror"), e);
        } catch (SQLException eSQL) {
            throw new BasicException(AppLocal.getIntString("message.databaseconnectionerror"), eSQL);
        }   
    }    
    
    
    private static boolean isJavaWebStart() {

        try {
            Class.forName("javax.jnlp.ServiceManager");
            return true;
        } catch (ClassNotFoundException ue) {
            return false;
        }
    }
}