/*

* Copyright (c) 2004-2008 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.Generic;

using System.Text;

using SymbianUtils;

using SymbianParserLib.Engine;

using SymbianParserLib.Elements;

using CrashDebuggerLib.Parsers.State;

using CrashDebuggerLib.Structures;

namespace CrashDebuggerLib.Parsers

{

    public class CrashDebuggerParser : AsyncTextFileReader

    {

        #region Constructors

        public CrashDebuggerParser( CrashDebuggerInfo aCrashDebugger, string aFileName )

            : base( aFileName )

        {

            iCrashDebugger = aCrashDebugger;

            //

            iCommandParser.ParagraphComplete += new SymbianParserLib.BaseStructures.ParserElementBase.ElementCompleteHandler( CommandParser_ParagraphComplete );

            PrepareCommandParser();

            // We need to preserve white space

            TrimLine = false;

        }

        #endregion

        #region API

        public void ParseCrashData()

        {

            base.AsyncRead();

        }

        #endregion

        #region Properties

        public CrashDebuggerInfo CrashDebugger

        {

            get { return iCrashDebugger; }

        }

        #endregion

        #region Internal methods

        private void PrepareCommandParser()

        {

            StateFactory.RegisterCommands( iCommandParser );

        }

        #endregion

        #region Internal constants

        #endregion

        #region Event handlers

        void CommandParser_ParagraphComplete( SymbianParserLib.BaseStructures.ParserElementBase aElement )

        {

            TState state = (TState) aElement.Tag;

            State.State nextState = StateFactory.Create( state, this );

            //

            if ( iStateObject != null )

            {

                iStateObject.Finalise();

                iStateObject = null;

            } 

            //

            if ( nextState == null )

            {

                throw new ArgumentException( "Invalid state: " + state );

            }

            //

            iStateObject = nextState;

            iCurrentState = state;

            //

#if DEBUG

            System.Diagnostics.Debug.WriteLine( "SWITCHING STATE: => " + iStateObject.GetType().ToString() );

#endif

        }

        #endregion

        #region From AsyncTextFileReader

        protected override void HandleReadStarted()

        {

            iCrashDebugger.Clear();

            base.HandleReadStarted();

        }

        protected override void HandleReadCompleted()

        {

            try

            {

                if ( iStateObject != null )

                {

                    iStateObject.Finalise();

                    iStateObject = null;

                }

                // Start the async op queue

                iCrashDebugger.AsyncOperationManager.Start();

            }

            finally

            {

                base.HandleReadCompleted();

            }

            System.Diagnostics.Debug.WriteLine( "TOTAL REGEX TICKS - " + SymbianParserLib.RegExTranslators.TheTickCounter.TickCount.ToString( "d12" ) );

        }

        protected override void HandleFilteredLine( string aLine )

        {

            string line = aLine;

            bool consumed = iCommandParser.OfferLine( ref line );

            if ( !consumed && iStateObject != null )

            {

                ParserEngine stateParser = iStateObject.ParserEngine;

                stateParser.OfferLine( ref line );

            }

        }

        #endregion

        #region From System.Object

        public override string ToString()

        {

            return base.ToString();

        }

        #endregion

        #region Internal LUT

        #endregion

        #region Data members

        private readonly CrashDebuggerInfo iCrashDebugger;

        private ParserEngine iCommandParser = new ParserEngine();

        private State.State iStateObject = null;

        private TState iCurrentState = TState.EStateIdle;

        #endregion

    }

}