/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

* 

* Description:

*

*/

using System;

using System.Xml;

using System.Text;

using System.IO;

using System.Collections.Generic;

using Microsoft.Win32;

using System.Diagnostics;

using System.Collections;

using System.Windows.Forms;

namespace SymbianUtils.Settings

{

    public class XmlSettingCategory

	{

		#region Constructors

		public XmlSettingCategory( string aName )

		{

			iName = aName;

			iVersion = (Version) XmlSettings.CurrentSettingsVersion.Clone();

		}

		public XmlSettingCategory( XmlReader aReader )

		{

            XmlUtils.ReadAttributeValue( aReader, "name", out iName );

            //

            string versionAsString;

			XmlUtils.ReadAttributeValue( aReader, "version", out versionAsString );

            iVersion = new Version( versionAsString );

		}

		#endregion

		#region Store & Restore API

		internal void WriteSettings( XmlWriter aWriter )

		{

			aWriter.WriteStartElement( Name, null );

		    //

            foreach ( KeyValuePair<string, XmlSettingsValue> pair in iSettings )

            {

                // Write overall item encapsulation header

                aWriter.WriteStartElement( "item", null );

                    // Write key

                    aWriter.WriteAttributeString( "key", pair.Key );

                    // Get value object to write itself out

                    pair.Value.Write( aWriter );

                // End item

                aWriter.WriteEndElement();

            }

            //

            aWriter.WriteEndElement();

		}

        internal void ReadSettings( XmlReader aReader )

		{

			while ( !aReader.EOF && aReader.Name == "item" )

			{

				if ( aReader.NodeType != XmlNodeType.EndElement )

				{

                    string key = XmlUtils.ReadAttributeValue( aReader, "key" );

                    //

                    XmlSettingsValue value = new XmlSettingsValue( aReader );

                    iSettings.Add( key, value );

				}

				aReader.Read();

			}

            //

			SymbianUtils.SymDebug.SymDebugger.Assert(aReader.Name == Name);

		}

		#endregion

        #region Misc. API

        internal void Add( string aKey, string aValue )

		{

            XmlSettingsValue value = new XmlSettingsValue( aValue );

            iSettings.Add( aKey, value );

		}

        internal void Remove( string aKey )

		{

            if ( iSettings.ContainsKey( aKey ) )

            {

                iSettings.Remove( aKey );

			}

		}

        public bool Contains( string aKey )

        {

            return iSettings.ContainsKey( aKey );

        }

		public bool Exists( string aKey )

		{

            return Contains( aKey );

		}

		#endregion

		#region Properties

		public string Name

		{

			get { return iName; }

		}

		public Version Version

		{

			get { return iVersion; }

		}

		#endregion

		#region Indexers

        public XmlSettingsValue this[ string aKey ]

		{

			get

			{

                XmlSettingsValue ret = new XmlSettingsValue( string.Empty );

                //

                if ( Exists( aKey ) )

                {

                    ret = iSettings[ aKey ];

                }

                else

                {

                    iSettings.Add( aKey, ret );

                }

                //

                return ret;

			}

			set

			{

                if ( !Exists( aKey ) )

                {

                    iSettings.Add( aKey, value );

                }

                else

                {

                    // Item already exists

                    iSettings[ aKey ] = value;

                }

            }

		}

		#endregion

		#region Internal methods

		#endregion

		#region Data members

		private readonly string iName;

		private readonly Version iVersion;

        private SortedList<string, XmlSettingsValue> iSettings = new SortedList<string, XmlSettingsValue>();

		#endregion

	}

}