/*

* 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:  Bluetooth Engine server state machine class implementation.

*

*/

#include <ecom/ecomresolverparams.h>

#include "btengsrvstate.h"

#include "btengserver.h"

#include "btengsrvpluginmgr.h"

#include "btengsrvsettingsmgr.h"

#include "debug.h"

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// C++ default constructor

// ---------------------------------------------------------------------------

//

CBTEngSrvState::CBTEngSrvState( CBTEngServer* aServer )

:   iState( EInit ),

    iOperation( ESrvOpIdle ),

    iServer( aServer )

    {

    }

// ---------------------------------------------------------------------------

// Symbian 2nd-phase constructor

// ---------------------------------------------------------------------------

//

void CBTEngSrvState::ConstructL()

    {

    TRACE_FUNC_ENTRY

    // Create the active object handling asynchronous state transitions.

    // The state transitions need to be done fast, as it can be initiated 

    // through user interaction (i.e. the user is waiting).

    const TCallBack cb(&ChangeStateCb, this);

    iAsyncCallback = new(ELeave) CAsyncCallBack(cb, CActive::EPriorityHigh);

    TRACE_FUNC_EXIT

    }

// ---------------------------------------------------------------------------

// NewL

// ---------------------------------------------------------------------------

//

CBTEngSrvState* CBTEngSrvState::NewL( CBTEngServer* aServer )

    {

    CBTEngSrvState* self = new( ELeave ) CBTEngSrvState( aServer );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// Destructor

// ---------------------------------------------------------------------------

//

CBTEngSrvState::~CBTEngSrvState()

    {

    delete iAsyncCallback;

    }

// ---------------------------------------------------------------------------

// Returns the current state machine operation.

// ---------------------------------------------------------------------------

//

CBTEngSrvState::TBTEngSrvOperation CBTEngSrvState::CurrentOperation()

    {

    return iOperation;

    }

// ---------------------------------------------------------------------------

// ?implementation_description

// ---------------------------------------------------------------------------

//

void CBTEngSrvState::StartStateMachineL( TBTPowerState aState )

    {

    TRACE_FUNC_ENTRY

    if( aState == EBTOn )

        {

        // Power on; starting state is initializing the stack

        iState = EInitBTStack;

        iOperation = EPowerOn;

        }

    else

        {

        // Power off, starting state is to disconnect the plug-ins

        iState = EDisconnectPlugins;

        iOperation = EPowerOff;

        iServer->SettingsManager()->SetUiIndicatorsL();

        }

    ChangeState();

    }

// ---------------------------------------------------------------------------

// ?implementation_description

// ---------------------------------------------------------------------------

//

void CBTEngSrvState::ChangeState()

    {

    TRACE_FUNC_ENTRY

    iAsyncCallback->CallBack();

    }

// ---------------------------------------------------------------------------

// ?implementation_description

// ---------------------------------------------------------------------------

//

TInt CBTEngSrvState::ChangeStateCb(TAny* aThis)

    {

    TRAPD(err, static_cast<CBTEngSrvState*>(aThis)->RequestCompletedL());

    if(err != KErrNone)

        {

        static_cast<CBTEngSrvState*>(aThis)->HandleError(err);

        }

    return KErrNone;

    }

// ---------------------------------------------------------------------------

// From class MBTEngActiveObserver.

// ?implementation_description

// ---------------------------------------------------------------------------

//

void CBTEngSrvState::RequestCompletedL()

    {

    switch( iState )

        {

        case EInitBTStack:

            {

            iState = ELoadDIService;

            iServer->SettingsManager()->InitBTStackL();

            }

            break;

        case ELoadDIService:

            {

            iState = ELoadPlugins;

            iServer->ManageDIServiceL( ETrue );

            }

            break;

        case ELoadPlugins:

            {

            iState = ELoadNextPlugin;

            TEComResolverParams params;

            iServer->PluginManager()->LoadProfilePluginsL( params );

            }

            break;

        case ELoadNextPlugin:

            {

                // Only change the state when all plug-ins are loaded

            if( iServer->PluginManager()->LoadPluginL() <= 0 )

                {

                iState = EIdle;

                }

            }

            break;

        case EStopBTStack:

            {

            iState = EWaitingForPowerOff;

            iServer->SettingsManager()->StopBTStackL();

            }

            break;

        case EUnloadDIService:

            {

            iState = EStopBTStack;

            iServer->ManageDIServiceL( EFalse );

            }

            break;

        case EUnloadPlugins:

            {

            iState = EUnloadDIService;

            iServer->PluginManager()->UnloadProfilePlugins();

            }

            break;

        case EDisconnectPlugins:

            {

            iState = EUnloadPlugins;

            // This is the starting state; the disconnect command has 

            // already been sent. Just one more loop to give more time

            // for disconnecting.

            }

            break;

        case EWaitingForPowerOff:

            {

            // Disconnecting all connections completed and 

            // called us back; we are done.

            iState = EIdle;

            }   // Fall through

        case EIdle:

            {

            if( iOperation == EPowerOn )

                {

                iServer->SettingsManager()->SetUiIndicatorsL();

                }

            iOperation = ESrvOpIdle;

            iServer->CheckIdle();

            }

        case EInit:

        default:

            break;

        }

    // In state EWaitingForPowerOff, we change the state 

    // through a callback in the server.

    if( iOperation != ESrvOpIdle && iState != EWaitingForPowerOff )

        {

        ChangeState();

        }

    TRACE_FUNC_EXIT

    }

// ---------------------------------------------------------------------------

// From class MBTEngActiveObserver.

// Handles a leave in RunL/RequestCompletedL.

// ---------------------------------------------------------------------------

//

void CBTEngSrvState::HandleError(TInt aError)

    {

    TRACE_FUNC_ARG( ( _L( "error: %d" ), aError ) )

    (void) aError;

    // All critical operations are done in turning power on; all other

    // operations are recoverable i.e. we can do without loading/unloading

    // of services. So simply change the state to handle next state change.

    ChangeState();

    }