/*
 * GathererBuilding.cs
 * Authors: Bradley Blankenship
 * Copyright (c) 2007-2008 Cornell University

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program 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 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; 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;
using System.Text;
using Microsoft.Xna.Framework.Content;
using System.Xml;

namespace ColonySim.Buildings
{
	/// <summary>
	/// Represents a building which is used to gather resources.
	/// </summary>
	internal class GathererBuilding : Building
	{
		#region Fields

		// String of the types of resources we can gather
		string mGatheringString;

		// The types of resources this can gather, with their rates
		Resource mGatherableResources;

		#endregion

		#region Properties

		/// <summary>
		/// Allows access to the gatherable resources for the Gatherer.
		/// </summary>
		public Resource GatherableResources
		{
			get { return mGatherableResources; }
			set { mGatherableResources = value; }
		}

		#endregion

		#region Constructs

		/// <summary>
		/// Base constructor
		/// </summary>
		public GathererBuilding()
		{
			// Initialize the gatherable resource / rate map
			mGatherableResources = new Resource();
		}

		#endregion

		#region Initialization

		/// <summary>
		/// Initialize the building.
		/// </summary>
		public override void Initialize()
		{
			// Base call
			base.Initialize();

			// Split up the string of resources
			string[] stringArray = mGatheringString.Split(';');

			// Now generate the resources based on the pairs
			foreach (string pair in stringArray)
			{
				// Get the string for the resource name and the gathering rate
				string name = pair.Split(',')[0].Trim();
				float value = float.Parse(pair.Split(',')[1].Trim());

				// Add the new resource
				mGatherableResources += new SimpleResource((Resources)Enum.Parse(typeof(Resources), name), value);
			}
		}

		#endregion

		#region Update

		/// <summary>
		/// Update the game based on the given time.
		/// </summary>
		/// <param name="gameTime">The current game time.</param>
		public override void Update(Microsoft.Xna.Framework.GameTime gameTime)
		{

		}

		#endregion

		#region Utility

        /// <summary>
        /// Reads in the base data for a given building into the values. Requires
        /// that the input text reader is already at the proper position for reading the data.
        /// </summary>
        /// <param name="input">The reader to read the data.</param>
        protected override void ReadData(XmlTextReader input)
        {
            // Base call
            base.ReadData(input);

            // Read the specific building values
            this.mGatheringString = input.GetAttribute("GatherableResources");
        }

		public override string ToString()
		{
			// Get the base value
			StringBuilder retVal = new StringBuilder(base.ToString());

			// State the gatherable resources
			retVal.Append("Gatherable Resources:");
			retVal.Append('\n');

			// Now add each of the gatherable resources
			retVal.Append(mGatherableResources.ToString());

			// Return the value
			return retVal.ToString();
		}

		/// <summary>
		/// Read in a list of gatherer buildings.
		/// </summary>
		/// <param name="file">The file to read from.</param>
		/// <returns>The list of buildings.</returns>
        public static List<Building> Read(string file)
		{
			// The return value
            List<Building> retVal = new List<Building>();

			// Create the XML reader for the XML file
			XmlTextReader input = new XmlTextReader(file);
			input.WhitespaceHandling = WhitespaceHandling.None;

			// Read in the values for the input
			while (input.Read())
			{
				// If this is the item we need
				if (input.Name == "Building" && input.NodeType == XmlNodeType.Element
					&& input.HasAttributes)
				{
					// Create the building
					GathererBuilding item = new GathererBuilding();

					// Read the building data
                    item.ReadData(input);

					// Initialize the item
					item.Initialize();

					// Add the item
					retVal.Add(item);
				}
			}

			// Close the input stream
			input.Close();

			// Return the new entertainment building
			return retVal;
		}

		#endregion
	}
}