/*
 * Copyright (c) 2015 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */

package org.opendaylight.bgpmanager.commands;

import org.apache.karaf.shell.commands.*;
import org.apache.karaf.shell.console.OsgiCommandSupport;
import org.opendaylight.bgpmanager.BgpManager;

@Command(scope = "odl", name = "bgp-misc", 
         description = "Add or delete miscellaneous BGP config options")
public class Misc extends OsgiCommandSupport {
    private static final String LF = "--log-file";
    private static final String LL = "--log-level";
    private static final String SP = "--stalepath-time";

    @Argument(name="add|del", description="The desired operation", 
              required=true, multiValued = false)
    private String action = null;

    @Option(name=LF, aliases={"-f"}, 
            description="Log file name", 
            required=false, multiValued=false)
    private String file = null;

    @Option(name=LL, aliases={"-l"},
            description="Log level", required=false, 
            multiValued=false)
    private String level = null;

    @Option(name=SP, aliases={"-s"},
            description="Stale-path time", required=false, 
            multiValued=false)
    private String spt = null;

    private Object usage() {
        System.err.println(
        "usage: bgp-misc [<"+LF+" name> <"+LL+" level>] ["
        +SP+" stale-path-time] <add | del>");
        return null;
    } 

    private boolean isValidLevel(String level) {
        switch (level) {
            case "emergencies":
            case "alerts":
            case "critical":
            case "errors":
            case "warnings":
            case "notifications":
            case "informational":
            case "debugging": 
                return true;
            default: 
                break;
        }
        return false;
    }

    @Override
    protected Object doExecute() throws Exception {
        if (!Commands.bgpRunning()) {
            return null;
        }
        if (spt == null && file == null && level == null) {
            return usage();
        }
        if (file != null ^ level != null) {
            return usage();
        }
        if (level != null && !isValidLevel(level)) { 
            System.err.println("error: invalid value for "+LL);
            return null;
        }
        BgpManager bm = Commands.getBgpManager();
        switch (action) {
            case "add" : 
                if (spt != null && Commands.isValid(spt, Commands.INT, SP)) {
                    int s = Integer.valueOf(spt);
                    bm.configureGR(s);
                }
                if (file != null && level != null) 
                bm.setQbgpLog(file, level);
                break;
            case "del" :  
                if (spt != null) {
                    bm.delGracefulRestart();
                }
                if (file != null && level != null) {
                    bm.delLogging();
                }
                break;
            default : 
                return usage();
        }
        return null;
    }
}