/*
 *    Copyright 2004-2006 Intel Corporation
 * 
 *    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.
 */


#include "InterfaceCommand.h"
#include "contacts/InterfaceTable.h"
#include "conv_layers/ConvergenceLayer.h"
#include <oasys/util/StringBuffer.h>

namespace dtn {

InterfaceCommand::InterfaceCommand()
    : TclCommand("interface") 
{
    add_to_help("add <name> <conv layer> [<args>?]",
                "add an interface");
    add_to_help("del <name>", "delete an interface");
    add_to_help("list", "list all of the interfaces");
}

int
InterfaceCommand::exec(int argc, const char** argv, Tcl_Interp* interp)
{
    (void)interp;
    // interface list
    if (strcasecmp("list", argv[1]) == 0) {
        // XXX/bowei -- seems to like to core
        if (argc > 2) {
            wrong_num_args(argc, argv, 1, 2, 2);
        }

        oasys::StringBuffer buf;
        InterfaceTable::instance()->list(&buf);
        set_result(buf.c_str());

        return TCL_OK;
    }
    
    // interface add <name> <conv_layer> <args>
    else if (strcasecmp(argv[1], "add") == 0) {
        if (argc < 4) {
            wrong_num_args(argc, argv, 1, 4, INT_MAX);
            return TCL_ERROR;
        }
        
        const char* name    = argv[2];
        const char* proto   = argv[3];

        ConvergenceLayer* cl = ConvergenceLayer::find_clayer(proto);
        if (!cl) {
            resultf("can't find convergence layer for %s", proto);
            return TCL_ERROR;
        }

        // XXX/demmer return error string from here
        if (! InterfaceTable::instance()->add(name, cl, proto,
                                              argc - 4, argv + 4)) {
            resultf("error adding interface %s", name);
            return TCL_ERROR;
        }
        return TCL_OK;
    }

    // interface del <name>
    else if (strcasecmp(argv[1], "del") == 0) {
        if (argc != 3) {
            wrong_num_args(argc, argv, 2, 4, 4);
            return TCL_ERROR;
        }

        const char* name = argv[2];
        
        if (! InterfaceTable::instance()->del(name)) {
            resultf("error removing interface %s", name);
            return TCL_ERROR;
        }

        return TCL_OK;
    }
    
    resultf("invalid interface subcommand %s", argv[1]);
    return TCL_ERROR;
}

} // namespace dtn