/*

* 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.Generic;

using System.Text;

using System.Threading;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using SymbianUtils;

using SymbianUtils.PluginManager;

using SymbianUtils.FileSystem;

using SymbianUtils.Settings;

using SymbianDebugLib.Engine;

using SymbianDebugLib.PluginAPI;

namespace SymbianDebugLib.Entity.Primer

{

    public partial class DbgEntityPrimerUi : Form, IDbgEntityPrimer

    {

        #region Constructors

        public DbgEntityPrimerUi( DbgEntity aEntity, DbgPluginEngine aPlugin )

        {

            iEntity = aEntity;

            iPlugin = aPlugin;

            // Make a new primer and seed it with the entity.

            iPrimer = aPlugin.CreatePrimer();

            iPrimer.Add( aEntity );

            // Listen to plugin primer events

            iPrimer.EventHandler += new DbgPluginPrimer.PrimeEventHandler( PrimerPlugin_EventHandler );

            //

            this.InitializeComponent();

            this.Text = string.Format( "Preparing: [{0}]", Path.GetFileName( aEntity.FullName ) );

        }

        #endregion

        #region From IDbgEntityPrimer

        public void Prime( TSynchronicity aSynchronicity )

        {

            // Timer initiates operation

            iTimer_OpStart.Tag = aSynchronicity;

            iTimer_OpStart.Start();

            // Show the dialog

            base.ShowDialog();

        }

        public string PrimeErrorMessage

        {

            get { return iEntity.PrimerResult.PrimeErrorMessage; }

        }

        public Exception PrimeException

        {

            get { return iEntity.PrimerResult.PrimeException; }

            internal set { iEntity.PrimerResult.PrimeException = value; }

        }

        #endregion

        #region Event handlers

        private void Timer_OpStart_Tick( object sender, EventArgs aArgs )

        {

            iTimer_OpStart.Stop();

            iTimer_OpStart.Enabled = false;

            //

            TSynchronicity syncMode = (TSynchronicity) iTimer_OpStart.Tag;

            PrimeException = null;

            // If requested to prime asynchronously then we don't need to 

            // do anything because this will return immediately and the

            // prime will run in a background thread.

            //

            // On the other hand, if requesting synchronous priming then 

            // we need to spawn a worker thread or else the progress dialog

            // will not redraw (since the synchronous operation runs within

            // the context of the thread in which the synchronous prime request

            // originates).

            switch ( syncMode )

            {

            case TSynchronicity.EAsynchronous:

                RunPrime( TSynchronicity.EAsynchronous );

                break;

            case TSynchronicity.ESynchronous:

                ThreadPool.QueueUserWorkItem( new WaitCallback( RunSyncPrimeInWorkerThread ) );

                break;

            default:

                throw new NotSupportedException( "Unsupported synchronicity" );

            }

        }

        #endregion

        #region Event handlers

        private void PrimerPlugin_EventHandler( DbgPluginPrimer.TPrimeEvent aEvent, object aData )

        {

            System.Diagnostics.Debug.WriteLine( string.Format( "PrimerPlugin - event handler - {0} - {1}", aEvent, aData ) );

            if ( InvokeRequired )

            {

                DbgPluginPrimer.PrimeEventHandler callback = new DbgPluginPrimer.PrimeEventHandler( PrimerPlugin_EventHandler );

                this.BeginInvoke( callback, new object[] { aEvent, aData } );

            }

            else

            {

                switch ( aEvent )

                {

                case DbgPluginPrimer.TPrimeEvent.EEventPrimingStarted:

                    iProgressBar.Maximum = 100; //%

                    iProgressBar.Minimum = 0; //%

                    iProgressBar.Value = 0;

                    OnPrimeStart();

                    break;

                case DbgPluginPrimer.TPrimeEvent.EEventPrimingProgress:

                    if ( aData != null && ( aData is int ) )

                    {

                        int prog = (int) aData;

                        OnPrimeProgress( prog );

                        iProgressBar.Value = prog;

                    }

                    break;

                case DbgPluginPrimer.TPrimeEvent.EEventPrimingComplete:

                    iProgressBar.Value = 100;

                    OnPrimeComplete();

                    Close();

                    break;

                }

            }

            //

            Application.DoEvents();

        }

        #endregion

        #region Event cascading

        protected void OnPrimeStart()

        {

            bool sent = ( ( iFlags & TFlags.EFlagsSentEventStart ) == TFlags.EFlagsSentEventStart );

            if ( !sent )

            {

                iEntity.OnPrimeStart( this );

                iFlags |= TFlags.EFlagsSentEventStart;

            }

        }

        protected void OnPrimeProgress( int aValue )

        {

            iEntity.OnPrimeProgress( this, aValue );

        }

        protected void OnPrimeComplete()

        {

            bool sent = ( ( iFlags & TFlags.EFlagsSentEventComplete ) == TFlags.EFlagsSentEventComplete );

            if ( !sent )

            {

                // Update entity's primer results

                iEntity.OnPrimeComplete( this );

                iFlags |= TFlags.EFlagsSentEventComplete;

            }

        }

        #endregion

        #region Internal enumerations

        [Flags]

        private enum TFlags

        {

            EFlagsNone = 0,

            EFlagsSentEventStart = 1,

            EFlagsSentEventComplete = 2

        }

        #endregion

        #region Internal methods

        private void RunSyncPrimeInWorkerThread( object aNotUsed )

        {

            RunPrime( TSynchronicity.ESynchronous );

        }

        private void RunPrime( TSynchronicity aSynchronicity )

        {

            try

            {

                iPrimer.Prime( aSynchronicity );

            }

            catch ( Exception e )

            {

                OnPrimeStart();

                PrimeException = e;

                OnPrimeComplete();

            }

        }

        #endregion

        #region Data members

        private readonly DbgEntity iEntity;

        private readonly DbgPluginEngine iPlugin;

        private readonly DbgPluginPrimer iPrimer;

        private TFlags iFlags = TFlags.EFlagsNone;

        #endregion

    }

}