/*************************************************************************
 *                                                                       *
 *  EJBCA Community: The OpenSource Certificate Authority                *
 *                                                                       *
 *  This software is free software; you can redistribute it and/or       *
 *  modify it under the terms of the GNU Lesser General Public           *
 *  License as published by the Free Software Foundation; either         *
 *  version 2.1 of the License, or any later version.                    *
 *                                                                       *
 *  See terms of license at gnu.org.                                     *
 *                                                                       *
 *************************************************************************/
package org.ejbca.ui.cli.batch;

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

import org.apache.log4j.Logger;
import org.ejbca.core.model.InternalEjbcaResources;

/**
 * Class used to manage the batch tool property file.
 *
 *
 * @version $Id: BatchToolProperties.java 19902 2014-09-30 14:32:24Z anatom $
 */
public class BatchToolProperties {

	private static final String PROPERTY_KEYSPEC          = "keys.spec";
	private static final String PROPERTY_KEYALG           = "keys.alg";


	Properties batchToolProperties = new Properties();
	private static final Logger log = Logger.getLogger(BatchToolProperties.class);

	private Logger logger;
	
	public BatchToolProperties(Logger logger){
	    this.logger = logger;
		load();
	}

	/**
	 * Returns the configured keysize
	 * Default is 2048
	 */
	public String getKeySpec(){
		return batchToolProperties.getProperty(PROPERTY_KEYSPEC,"2048");
	}

	/**
	 * Returns the configured key algorithm
	 * Default is RSA, can be ECDSA
	 */
	public String getKeyAlg(){
		return batchToolProperties.getProperty(PROPERTY_KEYALG,"RSA");
	}


	private boolean tryLoadFile(String filename) throws IOException {
		File file = new File(filename);
		if (file.exists()) {
			FileInputStream fis = new FileInputStream(file);
			batchToolProperties.load(fis);
			logger.info(InternalEjbcaResources.getInstance().getLocalizedMessage("batch.loadingconfig", filename));
			return true;
		} else {
			return false;
		}
	}

	/**
	 * Method that tries to read the property file 'batchtool.properties'
	 * in the home directory then in the current directory and finally
	 * in the conf/batchtool.properties.
	 *
	 * It will also try the old location in bin/ and print a deprecation
	 * warning if it exists there.
	 */
	private void load(){
        try {
        	if (!tryLoadFile(System.getProperty("user.home") + "/batchtool.properties") &&
        	    !tryLoadFile("batchtool.properties") &&
        	    !tryLoadFile("conf/batchtool.properties")) {
        	    // Not found
			    if (tryLoadFile("bin/batchtool.properties")) {
			    	log.info("The batchtool.properties file exists in bin/. It should be moved to conf/");
			    } else {
			    	log.debug("Could not find any batchtool property file, default values will be used.");
		            logger.info(InternalEjbcaResources.getInstance().getLocalizedMessage("batch.loadingconfig", "defaults"));
			    }
			}
		} catch (IOException e) {
			log.error("Error reading batchtool property file ");
			log.debug(e);
		}
	}



}