/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.
 */
var Thrift = require('./thrift');

var MultiplexedProcessor = exports.MultiplexedProcessor = function(stream, options) {
    this.services = {};
};

MultiplexedProcessor.prototype.registerProcessor = function(name, handler) {
    this.services[name] = handler;
};

MultiplexedProcessor.prototype.process = function(inp, out) {
    var begin = inp.readMessageBegin();
    if (begin.mtype != Thrift.MessageType.CALL && begin.mtype != Thrift.MessageType.ONEWAY) {
        throw new Thrift.TException("TMultiplexedProcessor: Unexpected message type");
    }

    var p = begin.fname.split(":");
    var sname = p[0];
    var fname = p[1];

    if (! (sname in this.services)) {
        throw new Thrift.TException("TMultiplexedProcessor: Unknown service: " + sname);
    }

    //construct a proxy object which stubs the readMessageBegin
    //for the service
    var inpProxy = {};
    for (var attr in inp) {
        inpProxy[attr] = inp[attr];
    }
    inpProxy.readMessageBegin = function() {
        return {
            fname: fname,
            mtype: begin.mtype,
            rseqid: begin.rseqid
        };
    };

    this.services[sname].process(inpProxy, out);
};
