/**
 * 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.
 *
 * Contains some contributions under the Thrift Software License.
 * Please see doc/old-thrift-license.txt in the Thrift distribution for
 * details.
 */

using System;
using Thrift.Protocol;
using Thrift.Transport;
using System.IO;

namespace Thrift.Server
{
    public abstract class TServer
    {
        //Attributes
        protected TProcessorFactory processorFactory;
        protected TServerTransport serverTransport;
        protected TTransportFactory inputTransportFactory;
        protected TTransportFactory outputTransportFactory;
        protected TProtocolFactory inputProtocolFactory;
        protected TProtocolFactory outputProtocolFactory;
        protected TServerEventHandler serverEventHandler = null;

        //Methods
        public void setEventHandler(TServerEventHandler seh)
        {
            serverEventHandler = seh;
        }
        public TServerEventHandler getEventHandler()
        {
            return serverEventHandler;
        }

        //Log delegation
        public delegate void LogDelegate(string str);
        private LogDelegate _logDelegate;
        protected LogDelegate logDelegate
        {
            get { return _logDelegate; }
            set { _logDelegate = (value != null) ? value : DefaultLogDelegate; }
        }
        protected static void DefaultLogDelegate(string s)
        {
            Console.Error.WriteLine(s);
        }

        //Construction
        public TServer(TProcessor processor,
                  TServerTransport serverTransport)
          : this(processor, serverTransport,
             new TTransportFactory(),
             new TTransportFactory(),
             new TBinaryProtocol.Factory(),
             new TBinaryProtocol.Factory(),
             DefaultLogDelegate)
        {
        }

        public TServer(TProcessor processor,
                TServerTransport serverTransport,
                LogDelegate logDelegate)
          : this(processor,
             serverTransport,
             new TTransportFactory(),
             new TTransportFactory(),
             new TBinaryProtocol.Factory(),
             new TBinaryProtocol.Factory(),
             logDelegate)
        {
        }

        public TServer(TProcessor processor,
                  TServerTransport serverTransport,
                  TTransportFactory transportFactory)
          : this(processor,
             serverTransport,
             transportFactory,
             transportFactory,
             new TBinaryProtocol.Factory(),
             new TBinaryProtocol.Factory(),
             DefaultLogDelegate)
        {
        }

        public TServer(TProcessor processor,
                  TServerTransport serverTransport,
                  TTransportFactory transportFactory,
                  TProtocolFactory protocolFactory)
          : this(processor,
             serverTransport,
             transportFactory,
             transportFactory,
             protocolFactory,
             protocolFactory,
               DefaultLogDelegate)
        {
        }

        public TServer(TProcessor processor,
            TServerTransport serverTransport,
            TTransportFactory inputTransportFactory,
            TTransportFactory outputTransportFactory,
            TProtocolFactory inputProtocolFactory,
            TProtocolFactory outputProtocolFactory,
            LogDelegate logDelegate)
        {
            this.processorFactory = new TSingletonProcessorFactory(processor);
            this.serverTransport = serverTransport;
            this.inputTransportFactory = inputTransportFactory;
            this.outputTransportFactory = outputTransportFactory;
            this.inputProtocolFactory = inputProtocolFactory;
            this.outputProtocolFactory = outputProtocolFactory;
            this.logDelegate = (logDelegate != null) ? logDelegate : DefaultLogDelegate;
        }

        public TServer(TProcessorFactory processorFactory,
                  TServerTransport serverTransport,
                  TTransportFactory inputTransportFactory,
                  TTransportFactory outputTransportFactory,
                  TProtocolFactory inputProtocolFactory,
                  TProtocolFactory outputProtocolFactory,
                  LogDelegate logDelegate)
        {
            this.processorFactory = processorFactory;
            this.serverTransport = serverTransport;
            this.inputTransportFactory = inputTransportFactory;
            this.outputTransportFactory = outputTransportFactory;
            this.inputProtocolFactory = inputProtocolFactory;
            this.outputProtocolFactory = outputProtocolFactory;
            this.logDelegate = (logDelegate != null) ? logDelegate : DefaultLogDelegate;
        }

        //Abstract Interface
        public abstract void Serve();
        public abstract void Stop();
    }
}
