/*********************************************************************/
/*                                                                   */
/*                     AgentService Framework                        */
/*                       www.agentservice.it                         */
/*                                                                   */
/* Copyright (C) 2007 l.i.d.o. - DIST, University of Genoa, Italy    */
/* GNU Lesser General Public License                                 */
/*                                                                   */
/* This library is free software; you can redistribute it and/or     */
/* modify it under the terms of the GNU Lesser General Public        */
/* License as published by the Free Software Foundation,             */
/* version 2.1 of the License.                                       */
/*                                                                   */
/* This library is distributed in the hope that it will be useful,   */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of    */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU */
/* Lesser General Public License for more details.                   */
/*                                                                   */
/* You should have received a copy of the GNU Lesser General Public  */
/* License along with this library; if not, write to the             */
/* Free Software Foundation, Inc., 59 Temple Place - Suite 330,      */
/* Boston, MA  02111-1307, USA.                                      */
/*                                                                   */
/*********************************************************************/
using System;
using System.Collections.Generic;

// this namespace defines the elements for the creation an management
// of agents.
using AgentService.Agent;
// this namespace contains the elements for the instantiation
// of new knowledges.
using AgentService.Agent.Knowledge;
// this namespac contains the elements for the instantiation
// of new behaviours.
using AgentService.Agent.Behaviour;
// this namespace defines the interface for the runtime services
using AgentService.Agent.Runtime;
// this namespace defines the elements for the messaging system
using AgentService.Platform.MTS;

namespace AuctionDemo
{
	/// <summary>
	/// The template of the agent that manages the auction
	/// </summary>
    [AgentKnowledges(typeof(AuctionData))]
    [AgentBehaviours(typeof(ManageAuction))]
	public class Auctioneer : AgentService.Agent.AgentTemplate
	{


		/// <summary>
        /// Reads data about the auction from a file. 
        /// The file has the following structure:
		/// item CRLF
		/// price CRLF
		/// minIncrement CRLF
		/// maxParticpants CRLF
		/// </summary>
		/// <param name="configFile">configuration file path</param>
		/// <returns>true if the file is successfully read</returns>
		public override bool Configure(string configFile)
		{
			System.IO.TextReader reader = null;
			try 
			{
				reader = new System.IO.StreamReader(configFile);
				
				string line = reader.ReadLine();
                this.settings.Add("Item", line);
               
				
				line = reader.ReadLine();
                this.settings.Add("Price", float.Parse(line));

				line = reader.ReadLine();
                this.settings.Add("MinIncrement", float.Parse(line));

				line = reader.ReadLine();
                this.settings.Add("MaxParticipants", int.Parse(line));

				return true;
			}
			catch(System.IO.IOException ioex)
			{
				return false;
			}
			catch(System.FormatException fex)
			{
				return false;
			}
			finally
			{
				if (reader != null)
				{
					reader.Close();
				}
			}
		}
		/// <summary>
		/// This method initializes the auctionner agent.
		/// </summary>
		/// <param name="factoryContext">factory object that allows the instantiation of knwoledge and behaviour</param>
        public override void Initiate(AgentService.Agent.Runtime.IFactoryContext factoryContext)
		{

            string item = this.settings["Item"] as string;
            float price = (float) this.settings["Price"];
            float minIncrement = (float) this.settings["MinIncrement"];
            int maxParticipants = (int)this.settings["MaxParticipants"];

			// it creates an instance of the knwoledge
			factoryContext.CreateKnowledge(typeof(AuctionData), "Auction", PersistenceMode.StrongPersistent, item, price, minIncrement, maxParticipants);
			// it creates an instance of the behaviour previously registered.
			factoryContext.CreateBehaviour(typeof(ManageAuction),"ManageAuction","Auction");
		}
		/// <summary>
		/// Handles the incoming conversation
		/// </summary>
		/// <param name="sender">event source</param>
		/// <param name="args">params related to the event</param>
		public override void HandleConversation(AgentService.Agent.Runtime.IAgentContext sender, ConversationArgs args)
		{
            int maxParticipants = (int) this.settings["MaxParticipants"];
			if (maxParticipants > 0)
			{
				maxParticipants--;
				// it accepts the conversation
				args.Conversation.Accept();
				// it adds the conversation to the conversations queue.
				sender.AddConversation("ManageAuction",args.Conversation);

                this.settings["MaxParticipants"] = maxParticipants;
			}
			else
			{
				// if the maximum number of participants is reached the incoming conversation is rejected.
				args.Conversation.Reject();
				args.Conversation.Close();
			}

		}
		
		/// <summary>
		/// Handles the termination of the agent.
		/// </summary>
		public override void Terminate() 
		{
			// non fa niente in questo caso.
		}

        /// <summary>
        /// Must override.
        /// Resumes the agent on Platform restart.
        /// </summary>
        /// <param name="typeContext">reference to the context for the registration of new knowledge and behaviour types</param>
        /// <param name="factoryContext">reference to the context for the istantiation of new knowledge and behaviour objects</param>
        public override void Resume(ITypeContext typeContext, IFactoryContext factoryContext)
        {
        }
	}
}