/**
 * Copyright (c) 2015, Lucee Assosication Switzerland. All rights reserved.
 *
 * This library 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 (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package lucee.runtime.config;

import java.io.IOException;

import lucee.commons.digest.Hash;
import lucee.commons.io.SystemUtil;
import lucee.commons.io.res.Resource;
import lucee.commons.lang.ExceptionUtil;
import lucee.commons.lang.Md5;
import lucee.loader.util.Util;

public abstract class IdentificationImpl implements Identification {

	private final String apiKey;
	private String id;
	private final String securityKey;
	private final String securityToken; 

	

	public IdentificationImpl(ConfigImpl c, String securityKey, String apiKey) {
		this.apiKey=apiKey;
		this.securityKey=securityKey;
		this.securityToken=createSecurityToken(c.getConfigDir());
	}
	

	@Override
	public String getApiKey() {
		return apiKey;
	}

	@Override
	public String getId() {
		// this is here for performance reasons
		if(id==null) id=createId(securityKey,securityToken,false,securityKey);
		return id;
	}

	@Override
	public String getSecurityKey() {
		return securityKey;
	}

	@Override
	public String getSecurityToken() {
		return securityToken;
	}

	
	static String createId(String key, String token,boolean addMacAddress,String defaultValue) {
    	
		try {
			if(addMacAddress){// because this was new we could swutch to a new ecryption // FUTURE cold we get rid of the old one?
				return Hash.sha256(key+";"+token+":"+SystemUtil.getMacAddress(""));
			}
			return Md5.getDigestAsString(key+token);
		} 
    	catch(Throwable t) {
    		ExceptionUtil.rethrowIfNecessary(t);
			return defaultValue;
		}
	}
	
	private static String createSecurityToken(Resource dir) {
    	try {
    		return Md5.getDigestAsString(dir.getAbsolutePath());
		} 
	    catch (IOException e) {
			return null;
		}
    	
	}

	protected static void append(StringBuilder qs, String name, String value) {
		if(Util.isEmpty(value,true)) return; 
		
		if(qs.length()>0)qs.append('&');
		else qs.append('?');
		qs.append(name).append('=').append(value); // TODO encoding
	}

}