/*-
 * ============LICENSE_START=======================================================
 * org.openecomp.aai
 * ================================================================================
 * 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.openecomp.aai.util;

import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.eclipse.jetty.util.security.Password;
import org.openecomp.aai.exceptions.AAIException;
import org.openecomp.aai.logging.ErrorLogHelper;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Properties;
import java.util.Timer;


public class AAIConfig {

	private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(AAIConfig.class);
	private static final String GLOBAL_PROP_FILE_NAME = AAIConstants.AAI_CONFIG_FILENAME;
	private static Properties serverProps;
    private static boolean propsInitialized = false;
    
    // this (probably) won't change between releases, put it in the config if it gets annoying...
    private static HashMap<String,ArrayList<String>> defaultBools = new HashMap<String,ArrayList<String>>();
    private static Timer timer = new Timer();
    
    /**
     * Instantiates a new AAI config.
     */
    // Don't instantiate
    private AAIConfig() {}

    /**
     * Inits the.
     *
     * @throws AAIException the AAI exception
     */
    public synchronized static void init() throws AAIException {
		LOGGER.info("Initializing AAIConfig");
		
		ArrayList<String> genericVnfBools = new ArrayList<String>();
		ArrayList<String> l3NetworkBools = new ArrayList<String>();
		ArrayList<String> pserverBools = new ArrayList<String>();
		ArrayList<String> subnetBools = new ArrayList<String>();
		ArrayList<String> vserverBools = new ArrayList<String>();
		ArrayList<String> vnfcBools = new ArrayList<String>();

		genericVnfBools.add("in-maint");
		genericVnfBools.add("is-closed-loop-disabled");
		l3NetworkBools.add("is-bound-to-vpn");
		pserverBools.add("in-maint");
		subnetBools.add("dhcp-enabled");
		vserverBools.add("in-maint");
		vserverBools.add("is-closed-loop-disabled");
		vnfcBools.add("in-maint");
		vnfcBools.add("is-closed-loop-disabled");

		defaultBools.put("generic-vnf", genericVnfBools);
		defaultBools.put("l3-network",  l3NetworkBools);
		defaultBools.put("pserver", pserverBools);
		defaultBools.put("subnet", subnetBools);
		defaultBools.put("vserver", vserverBools);
		defaultBools.put("vnfc", vnfcBools);
		
        AAIConfig.getConfigFile();
        AAIConfig.reloadConfig();
        
        if (AAIConstants.AAI_NODENAME == null || AAIConstants.AAI_NODENAME == "") {
            ErrorLogHelper.logError("AAI_4005", " AAI_NODENAME is not defined");
        } else {
            LOGGER.info("A&AI Server Node Name = " + AAIConstants.AAI_NODENAME);
        }
    }

    /**
     * Gets the default bools.
     *
     * @return the default bools
     */
    public static HashMap<String,ArrayList<String>> getDefaultBools() { 
    	return defaultBools;
    }
        
    /**
     * Cleanup.
     */
    public static void cleanup() {
		timer.cancel();
	}

    /**
     * Gets the config file.
     *
     * @return the config file
     */
    public static String getConfigFile() {
//        if (GlobalPropFileName == null) {
//        	String nc = System.getProperty("aaiconfig");
//			if (nc == null) nc = "/home/aaiadmin/etc/aaiconfig.props";
//		    logger.info( "aaiconfig = " + nc==null?"null":nc);
//			GlobalPropFileName = nc;
//        }
        return GLOBAL_PROP_FILE_NAME;
    }

    /**
     * Reload config.
     */
    public synchronized static void reloadConfig() {

        String propFileName = GLOBAL_PROP_FILE_NAME;
        Properties newServerProps = null;
        
        LOGGER.info("Reloading config from " + propFileName);
        
        try {
            InputStream is = new FileInputStream(propFileName);
            newServerProps = new Properties();
            newServerProps.load(is);
            propsInitialized = true;

            serverProps = newServerProps;
            newServerProps = null;
        	
        } catch (FileNotFoundException fnfe) {
        	ErrorLogHelper.logError("AAI_4001", " " + propFileName + ". Exception: "+fnfe.getMessage());
        } catch (IOException e) {
        	ErrorLogHelper.logError("AAI_4002", " " + propFileName + ". IOException: "+e.getMessage());
        }
    }
    
    /**
     * Gets the.
     *
     * @param key the key
     * @param defaultValue the default value
     * @return the string
     */
    public static String get(String key, String defaultValue) {
    	String result = defaultValue;
    	try {
    			result = get (key);
    	}
    	catch ( AAIException a ) {
    		
    	}
    	return ( result );
    }

    /**
     * Gets the.
     *
     * @param key the key
     * @return the string
     * @throws AAIException the AAI exception
     */
    public static String get(String key) throws AAIException {
    	String response = null;
    	
    	if (key.equals(AAIConstants.AAI_NODENAME)) {
    		// Get this from InetAddress rather than the properties file
    		String nodeName = getNodeName();
    		if (nodeName != null) {
    			return nodeName;
    		}
    		// else get from property file
    	}
    	
    	if (!propsInitialized || (serverProps == null)) {
    		reloadConfig();
    	}
    	
    	if ((key.endsWith("password") || key.endsWith("passwd") || key.endsWith("apisecret")) && serverProps.containsKey(key+".x")) {
    		String valx = serverProps.getProperty(key+".x");
    		return Password.deobfuscate(valx);
    	}
    	
    	if (!serverProps.containsKey(key)) {
    		throw new AAIException("AAI_4005", "Property key "+key+" cannot be found");
    	} else {
    		response = serverProps.getProperty(key);
    		if (response == null || response.isEmpty()) {
    			throw new AAIException("AAI_4005", "Property key "+key+" is null or empty");
    		}
    	}
    	return response;
	}

    /**
     * Gets the int.
     *
     * @param key the key
     * @return the int
     * @throws AAIException the AAI exception
     */
    public static int getInt(String key) throws AAIException {
    	return Integer.valueOf(AAIConfig.get(key));
	}

	/**
	 * Gets the server props.
	 *
	 * @return the server props
	 */
	public static Properties getServerProps() {
		return serverProps;
	}
	
	/**
	 * Gets the node name.
	 *
	 * @return the node name
	 */
	public static String getNodeName() {
		try {
            InetAddress ip = InetAddress.getLocalHost();
            if (ip != null) {
                   String hostname = ip.getHostName();
                   if (hostname != null) {
                	   return hostname;
                   }
            }
		} catch (Exception e) {
			return null;
		}
		return null;
	}
	
	
	/**
	 * Check if a null or an Empty string is passed in.
	 *
	 * @param s the s
	 * @return boolean
	 */
	public static boolean isEmpty(String s)
	{
		return (s == null || s.length() == 0);
	}

}