/*

* 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 class EnvEntry : EnvEntryBase

    {

        #region Constructors

        internal EnvEntry( DriveInfo aDriveInfo, out bool aIsValid )

            : base( aDriveInfo )

		{

            aIsValid = false;

			// Check whether drive contains Symbian OS environment

			try

			{

                bool gotSymbianVersion = BuildSymbianOSVersion();

                bool gotS60Version = BuildS60Version();

                // Check whether we have a valid Symbian OS version string.

                // If we do, then we don't care if the S60 version is missing

                if ( gotSymbianVersion )

                {

                    aIsValid = true;

                }

                else

                {

                    // Not valid - we didn't get a Symbian OS version

                }

			}

            catch

			{

                // Not valid

			}

		}

		#endregion

		#region Internal methods

        private bool BuildSymbianOSVersion()

		{

			string ver = string.Empty;

			string fileName = Path.Combine( DriveName, KSymbianBuildInfoFileAndPath );

            try

            {

                if ( File.Exists( fileName ) )

                {

                    //

                    using ( StreamReader reader = new StreamReader( fileName ) )

                    {

                        string line = reader.ReadLine();

                        while ( line != null )

                        {

                            if ( line.IndexOf( KSymbianBuildInfoMarkerText ) >= 0 )

                            {

                                ver = line.Replace( KSymbianBuildInfoMarkerText, "" ).Trim();

                                break;

                            }

                            line = reader.ReadLine();

                        }

                    }

                }

                else

                {

                    // Try to use a variant file instead.

                    string variantPath = Path.Combine( DriveName, KSymbianVariantPath );

                    DirectoryInfo dir = new DirectoryInfo( variantPath );

                    if ( dir.Exists )

                    {

                        FileInfo[] files = dir.GetFiles();

                        // Find the most recent file

                        FileInfo newest = null;

                        foreach ( FileInfo file in files )

                        {

                            if ( newest == null || file.LastWriteTimeUtc > newest.LastWriteTimeUtc )

                            {

                                newest = file;

                            }

                        }

                        if ( newest != null )

                        {

                            ver = Path.GetFileNameWithoutExtension( newest.FullName );

                        }

                    }

                }

            }

            catch

            {

            }

            // Update version

            bool valid = string.IsNullOrEmpty( ver ) == false;

            if ( valid )

            {

                base.VersionStringSymbian = ver;

            }

            return valid;

		}

		private bool BuildS60Version()

		{

			string ver = string.Empty;

			string fileName = Path.Combine( DriveName, KS60BuildInfoFileAndPath );

			//

            try

            {

                if ( File.Exists( fileName ) )

                {

                    using ( StreamReader reader = new StreamReader( fileName ) )

                    {

                        string line = reader.ReadLine();

                        while ( line != null )

                        {

                            if ( line.IndexOf( KS60BuildInfoMarkerText ) == 0 )

                            {

                                int breakPos = line.IndexOf( "\\n" );

                                if ( breakPos > 0 )

                                {

                                    ver = line.Substring( KS60BuildInfoMarkerText.Length, breakPos - KS60BuildInfoMarkerText.Length );

                                    break;

                                }

                            }

                            line = reader.ReadLine();

                        }

                    }

                }

            }

            catch

            {

            }

            // Update version

            bool valid = string.IsNullOrEmpty( ver ) == false;

            if ( valid )

            {

                base.VersionStringS60 = ver;

			}

            return valid;

		}

		#endregion

		#region Internal constants

		private const string KSymbianBuildInfoMarkerText = "ManufacturerSoftwareBuild";

		private const string KS60BuildInfoMarkerText = "V ";

		private const string KSymbianBuildInfoFileAndPath = @"epoc32\data\buildinfo.txt";

        private const string KSymbianVariantPath = @"epoc32\include\variant\";

        private const string KS60BuildInfoFileAndPath = @"epoc32\data\z\resource\versions\sw.txt";

		#endregion

		#region Data members

		#endregion

	}

}