/*

* 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.Collections;

using System.IO;

using System.Text;

namespace SymbianUtils.Environment

{

    public abstract class EnvEntryBase

    {

        #region Static factory function

        internal static EnvEntryBase New( DriveInfo aDriveInfo )

        {

            bool valid;

            //

            EnvEntryBase ret = new EnvEntry( aDriveInfo, out valid );

            if ( valid == false )

            {

                ret = new EnvEntryNull();

            }

            return ret;

        }

        #endregion

        #region Constructors

        protected EnvEntryBase( DriveInfo aDriveInfo )

        {

            iDriveInfo = aDriveInfo;

        }

        #endregion

        #region API

        public string CombineWithFile( string aFileName )

        {

            string ret = aFileName;

            //

            if ( iDriveInfo != null )

            {

                string drive = DriveName;

                if ( aFileName.Length > 2 )

                {

                    bool isDrive = aFileName[ 1 ] == ':';

                    if ( isDrive )

                    {

                        // Remove drive before combining with environment drive

                        aFileName = aFileName.Substring( 2 );

                    }

                    // Strip trailing backslash from drive name if already part

                    // of file name prefix

                    if ( aFileName.StartsWith( "\\" ) && drive.EndsWith( "\\" ) )

                    {

                        drive = drive.Substring( 0, drive.Length - 1 );

                    }

                }

                ret = drive + aFileName;

            }

            //

            return ret;

        }

        #endregion

        #region Properties

        public bool IsValid

        {

            get

            {

                bool ret = ( iDriveInfo != null ) && ( string.IsNullOrEmpty( iVersionStringSymbian ) == false );

                return ret;

            }

        }

        public DriveInfo DriveInfo

        {

            get { return iDriveInfo; }

        }

        public string DriveName

        {

            get

            {

                string ret = string.Empty;

                if ( iDriveInfo != null )

                {

                    ret = iDriveInfo.Name;

                }

                return ret;

            }

        }

        public string VolumeName

        {

            get

            {

                string ret = string.Empty;

                if ( iDriveInfo != null )

                {

                    ret = string.Format( "[ {0} ]", iDriveInfo.VolumeLabel );

                }

                return ret;

            }

        }

        public string VersionStringSymbian

        {

            get { return iVersionStringSymbian; }

            protected set { iVersionStringSymbian = value; }

        }

        public string VersionStringS60

        {

            get { return iVersionStringS60; }

            protected set { iVersionStringS60 = value; }

        }

        public bool IsS60Environment

        {

            get { return string.IsNullOrEmpty( iVersionStringS60 ) == false; }

        }

        #endregion

        #region From System.Object

        public override string ToString()

        {

            StringBuilder ret = new StringBuilder();

            ret.Append( DriveName );

            ret.Append( " " );

            ret.Append( VolumeName );

            ret.Append( " " );

            // Try to use S60 version string if we have it...

            if ( VersionStringS60.Length > 0 )

            {

                ret.Append( VersionStringS60 );

            }

            else

            {

                ret.Append( VersionStringSymbian );

            }

            //

            return ret.ToString();

        }

        #endregion

        #region Data members

        private readonly DriveInfo iDriveInfo;

        private string iVersionStringSymbian = string.Empty;

        private string iVersionStringS60 = string.Empty;

        #endregion

    }

}