/*
 * Copyright 2014 Open Networking Laboratory
 *
 * 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.
 */
package org.onosproject.dhcp.cli;

import org.apache.karaf.shell.commands.Argument;
import org.apache.karaf.shell.commands.Command;
import org.onlab.packet.MacAddress;
import org.onosproject.cli.AbstractShellCommand;
import org.onosproject.dhcp.DhcpService;

/**
 * Removes a static MAC Address to IP Mapping from the DHCP Server.
 */
@Command(scope = "onos", name = "dhcp-remove-static-mapping",
        description = "Removes a static MAC Address to IP Mapping from the DHCP Server")
public class DhcpRemoveStaticMapping extends AbstractShellCommand {

    @Argument(index = 0, name = "macAddr",
            description = "MAC Address of the client",
            required = true, multiValued = false)
    String macAddr = null;

    private static final String DHCP_SUCCESS = "Static Mapping Successfully Removed.";
    private static final String DHCP_FAILURE = "Static Mapping Removal Failed. " +
                                                "Either the mapping does not exist or it is not static.";

    @Override
    protected void execute() {
        DhcpService dhcpService = AbstractShellCommand.get(DhcpService.class);

        try {
            MacAddress macID = MacAddress.valueOf(macAddr);
            if (dhcpService.removeStaticMapping(macID)) {
                print(DHCP_SUCCESS);
            } else {
                print(DHCP_FAILURE);
            }

        } catch (IllegalArgumentException e) {
            print(e.getMessage());
        }
    }
}