/*

* 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.IO;

using System.Collections;

using System.Collections.Generic;

using System.Text;

using CrashItemLib.PluginAPI;

using CrashItemLib.Crash.Source;

using CrashItemLib.Engine.Sources;

namespace CrashItemLib.Engine.Primer

{

    internal class CIPrimerWorkingSet

    {

        #region Constructors

        public CIPrimerWorkingSet( CIEngine aEngine )

		{

            iEngine = aEngine;

        }

        #endregion

        #region API

        public void Clear()

        {

            iEntries.Clear();

        }

        public void Add( CFFSourceAndConfidence aEntry )

        {

            // For every single source file we might actually have multiple

            // plugins that claim they can interpet the contents.

            // 

            // Therefore we maintain a dictionary that is keyed by the file name

            // and contains a list of plugin handlers (and their associatied

            // confidence level for handling the source file).

            List<CFFSourceAndConfidence> entries = null;

            //

            FileInfo file = aEntry.MasterFile;

            System.Diagnostics.Debug.Assert( file != null );

            //

            if ( !iEntries.ContainsKey( file ) )

            {

                entries = new List<CFFSourceAndConfidence>();

                iEntries.Add( file, entries );

            }

            else

            {

                entries = iEntries[ file ];

            }

            //

            entries.Add( aEntry );

        }

        public void Add( IEnumerable<CFFSourceAndConfidence> aEntries )

        {

            foreach ( CFFSourceAndConfidence level in aEntries )

            {

                Add( level );

            }

        }

        public void Rationalise()

        {

            // At this point we're ready to decide how we will process the source

            // files. Some may be trace files, in which case we probably need to multiple

            // the various plugin handlers (that support trace-based content) so that they

            // can each have a stab at handling the trace content.

            //

            // For native (non-trace) handlers, we only let the handler with the highest

            // confidence ultimately read the file.

            //

            // 1) For any native entries, sort them by priority and discard

            //    everything but the highest priority entry.

            //

            // 2) For any trace entries, then we basically don't need to do anything

            //    because all entries will require processing via a trace reader.

            foreach ( KeyValuePair<FileInfo, List<CFFSourceAndConfidence>> kvp in iEntries )

            {

                // For native entries relating to this file

                List<CFFSourceAndConfidence> listNative = new List<CFFSourceAndConfidence>();

                // For trace entries relating to this file

                List<CFFSourceAndConfidence> listTrace = new List<CFFSourceAndConfidence>();

                FileInfo file = kvp.Key;

                List<CFFSourceAndConfidence> entries = kvp.Value;

                foreach ( CFFSourceAndConfidence conf in entries )

                {

                    if ( conf.OpType == CFFSource.TReaderOperationType.EReaderOpTypeNative )

                    {

                        listNative.Add( conf );

                    }

                    else if ( conf.OpType == CFFSource.TReaderOperationType.EReaderOpTypeTrace )

                    {

                        listTrace.Add( conf );

                    }

                    else

                    {

                        // Not supported

                    }

                }

                // Sort the native list based upon confidence level

                Comparison<CFFSourceAndConfidence> comparer = delegate( CFFSourceAndConfidence aLeft, CFFSourceAndConfidence aRight )

                {

                    return aLeft.CompareTo( aRight );

                };

                listNative.Sort( comparer );

                // Save highest priority native entry - only try to treat the source file as a

                // trace entry if no native entries claim to be able to read it.

                if ( listNative.Count > 0 )

                {

                    CFFSourceAndConfidence highestConfidence = listNative[ 0 ];

                    CIEngineSource sourceNative = CIEngineSource.NewNative( iEngine, highestConfidence );

                    iEngine.Sources.Add( sourceNative );

                }

                else if ( listTrace.Count > 0 ) 

                {

                    // If we found some trace entries, then immediately store the trace source.

                    // The listTrace array contains all of the plugins that claim to be able to

                    // read the trace-based source file.

                    CIEngineSource sourceTrace = CIEngineSource.NewTrace( iEngine, listTrace.ToArray() );

                    iEngine.Sources.Add( sourceTrace );

                }

            }

        }

        #endregion

        #region Properties

        #endregion

		#region Data members

        private readonly CIEngine iEngine;

        private Dictionary< FileInfo, List<CFFSourceAndConfidence> > iEntries = new Dictionary< FileInfo, List<CFFSourceAndConfidence> >();

        #endregion

    }

}