/*

* Copyright (c) 2007-2008 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:   Implementation for the VCC Calling state

*

*/

#include "tvccstatecalling.h"

#include "cvccperformer.h"

#include "rubydebug.h"

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

// c'tor

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

//

TVccStateCalling::TVccStateCalling()

	{

	RUBY_DEBUG_BLOCK( "TVccStateCalling::TVccStateCalling" );	

	} 

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

// Name

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

//	

TUint TVccStateCalling::Name() const

	{

	RUBY_DEBUG_BLOCK( "TVccStateCalling::Name" );

	return KVccStateCalling;

	}

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

// LinkState

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

//

void TVccStateCalling::LinkState(TVccState& aReleasing, 

                                TVccState& aInit, 

                                TVccState& aFailing )

	{

	RUBY_DEBUG_BLOCK( "TVccStateCalling::LinkState" );

	iReleasing = &aReleasing;

	iInit = &aInit;	

	iFailing = &aFailing;

	}

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

// HangUp

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

//

TInt TVccStateCalling::HangUp(CVccPerformer& aContext, MCCPCall& aCall)

	{

    RUBY_DEBUG_BLOCK( "TVccStateCalling::HangUp" );

	TInt err = KErrNotFound;

	__ASSERT_DEBUG(&aCall == aContext.PrimaryCall(), User::Invariant());

	//must release old leg and put old observer back aCall is the

	// same as returned in the iContext.PrimaryCall()

	aCall.RemoveObserver(aContext);

	//add new observer because the original call will be released and events 

	//must be suppressed and performer does not have to be on the path for this 

	//call anymore.

	TRAP_IGNORE(aCall.AddObserverL(*aContext.CallObserver()));

	//now hangup old leg and forget about it - CCE will take of it.

	//The performer will not be aware of the old leg release events.

	err = aCall.HangUp();

	//must release new call leg as well and suppress the events 	

	//new leg idle event should come in the releasing-state and

	//it will be suppressed.

	__ASSERT_DEBUG(aContext.SecondaryCall() != NULL, User::Invariant());

	aContext.SecondaryCall()->HangUp();

	//signal the performer for the "idle call", so it can stop the trigger

	//move to the releasing state

	aContext.SetState(*iReleasing);

	//stop trigger since call becomes not active

	aContext.ActivateTrigger( EFalse );

	//notify UI about hangup, hangup rejects HO but it is not failure

	//no need to show the "ho failed note"

	TRAP_IGNORE( aContext.Notifier().NotifySubscriberL(EVccCsToPsHoSuccessful, KErrNone) );

	return err;

	}

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

// CallStateChanged

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

//	

void TVccStateCalling::CallStateChanged( CVccPerformer& aContext, 

                                const MCCPCallObserver::TCCPCallState aState,

                                MCCPCall* aCall )

	{

	RUBY_DEBUG_BLOCK( "TVccStateCalling::CallStateChanged" );

	__ASSERT_DEBUG( aContext.SecondaryCall() != NULL, User::Invariant());

    __ASSERT_DEBUG( aContext.PrimaryCall() != NULL, User::Invariant() );

	if ( aState == MCCPCallObserver::ECCPStateConnected && 

         aContext.SecondaryCall() == aCall)

		{

        RUBY_DEBUG0( "TVccStateCalling::CallStateChanged - swap the calls" );

		aContext.SetCall(aContext.SecondaryCall());

		if ( aContext.Parameters().CallType() == CCPCall::ECallTypePS )

            {

            TRAP_IGNORE( aContext.Notifier().NotifySubscriberL( EVccCsToPsHoInprogress, 

                                                   KErrNone ) );

            RUBY_DEBUG0( "TVccStateCalling::CallStateChanged - call are swapped so hang up CS call now" );

            ReleaseCall( aContext, *aContext.SecondaryCall(), *iInit, KVccHoOk );

            return;

            }

        else

            {

            TRAP_IGNORE( aContext.Notifier().NotifySubscriberL( EVccPsToCsHoInprogress, 

                                                       KErrNone ) );

            }

		//-> Set Next State - if the call is idle just destroy call object and 

		//go to init-state

		__ASSERT_DEBUG( aContext.SecondaryCall() != NULL, 

		                User::Invariant());

		if ( aContext.SecondaryCall()->State() == 

		     MCCPCallObserver::ECCPStateIdle)

			{

            RUBY_DEBUG0( "TVccStateCalling::CallStateChanged -\

                         release the old leg" );

			//delete the actuall call object and move to Init-state

            ReleaseCall( aContext, *aContext.SecondaryCall(), *iInit, 

                         KVccHoOk );

			}

		else

			{

            RUBY_DEBUG0( "TVccStateCalling::CallStateChanged -\

                          set state to iReleasing" );

			//must wait for old leg to be released

			aContext.SetState( *iReleasing );	

			}				

        }

    else 

        {

        InspectChangedStates( aContext, 

                              aState, 

                              aCall, 

                              aContext.CallObserver(), 

                              &MCCPCallObserver::CallStateChanged );

        }

    }

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

// CallStateChangedWithInband

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

//  

void TVccStateCalling::CallStateChangedWithInband( CVccPerformer& aContext, 

                                const MCCPCallObserver::TCCPCallState aState,

                                MCCPCall* aCall )

    {

    RUBY_DEBUG_BLOCK( "TVccStateCalling::CallStateChangedWithInband" );

    __ASSERT_DEBUG( aContext.SecondaryCall() != NULL, User::Invariant() );

    __ASSERT_DEBUG( aContext.PrimaryCall() != NULL, User::Invariant() );

    InspectChangedStates(aContext, 

                        aState, 

                        aCall, 

                        aContext.CallObserver(), 

                        &MCCPCallObserver::CallStateChangedWithInband);

    }

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

// From MCCPCallObserver

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

//

void TVccStateCalling::ErrorOccurred( CVccPerformer& aContext, 

                                const TCCPError aError,

                                MCCPCall* aCall )

    {

    RUBY_DEBUG_BLOCK( "TVccStateCalling::ErrorOccurred" );

    RUBY_DEBUG1( "TVccStateCalling::ErrorOccurred - error: %d", aError );

    __ASSERT_DEBUG( aContext.CallObserver()!=NULL, User::Invariant() );

    __ASSERT_DEBUG(aContext.PrimaryCall()!=NULL, User::Invariant());

    __ASSERT_DEBUG(aCall != NULL, User::Invariant());

    if ( aCall == aContext.SecondaryCall() &&

         aContext.PrimaryCall()->State() == 

         MCCPCallObserver::ECCPStateConnected )

    	{

    	RUBY_DEBUG0( "TVccStateCalling::ErrorOccurred - set state to iFailing" );

    	aContext.SetState( *iFailing );

    	}

    else if( aCall == aContext.SecondaryCall() &&

            aContext.PrimaryCall()->State() != 

            MCCPCallObserver::ECCPStateConnected )

    	{

    //	RUBY_DEBUG0( "TVccStateCalling::ErrorOccurred - forward the error to CCE" );

    	//aContext.CallObserver()->ErrorOccurred( aError, 

    	  //                                      aContext.PrimaryCall() );

    	}

    //Update PS key to notify handover failure

    TRAP_IGNORE( aContext.Notifier().NotifySubscriberL( EVccCsToPsHoFailure, 

                                                        aError ) );

    }

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

// From MCCPCallObserver

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

//

void TVccStateCalling::CallEventOccurred(CVccPerformer& aContext, 

                                const MCCPCallObserver::TCCPCallEvent aEvent,

                                MCCPCall* aCall )

    {

    RUBY_DEBUG_BLOCK( "TVccStateCalling::CallEventOccurred" ); 

	__ASSERT_DEBUG(aContext.CallObserver()!=NULL, User::Invariant());

	__ASSERT_DEBUG(aCall != NULL, User::Invariant());

	//in successful HO case ECCPRemoteTerminated is also received when server

	//disconnects the original leg

	if ( aEvent == MCCPCallObserver::ECCPRemoteTerminated &&

	     aCall == aContext.SecondaryCall()  &&

	     aContext.PrimaryCall()->State() != MCCPCallObserver::ECCPStateConnected )

		{

		RUBY_DEBUG1( "TVccStateCalling::CallEventOccurred -\

		             forward the call event to CCE: %d", aEvent );

	 	aContext.CallObserver()->CallEventOccurred( aEvent, 

	                                                aContext.PrimaryCall());

		}

	else if( aEvent == MCCPCallObserver::ECCPRemoteTerminated &&

         aCall == aContext.SecondaryCall()  &&

         aContext.PrimaryCall()->State() == MCCPCallObserver::ECCPStateConnected )

	    {

	    RUBY_DEBUG0( "TVccStateCalling::CallEventOccurred - set state to iFailing" );

	    aContext.SetState( *iFailing );

	    }

	//if remote end holds the call HO is not allowed at this end either

	else if( aEvent == MCCPCallObserver::ECCPRemoteHold )

	    {

	    //Trigger is informed that automatic HO is not allowed. 

	    aContext.ActivateTrigger( EFalse );

	    //for manual HO PS key needs to be updated

	    aContext.AllowHo( EFalse );

	    aContext.CallObserver()->CallEventOccurred( aEvent, 

	                                                aContext.PrimaryCall());    

	    }

	else if( aEvent == MCCPCallObserver::ECCPRemoteResume )

	    {

	    //HO is allowed again

	    aContext.ActivateTrigger( ETrue );

	    //for manual HO PS key needs to be updated

	    aContext.AllowHo( ETrue );

	    aContext.CallObserver()->CallEventOccurred( aEvent, 

	                                                aContext.PrimaryCall());                    

	    }

	}

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

// InspectChangedStates

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

//

void TVccStateCalling::InspectChangedStates (CVccPerformer& aContext, 

                                const MCCPCallObserver::TCCPCallState aState,

                                MCCPCall* aCall,

                                MCCPCallObserver* aCallee,

                                void (MCCPCallObserver::*aCallback)

                                (const MCCPCallObserver::TCCPCallState, MCCPCall*))

    {

    //Remote party has disconnected the call - the events might arrive

    //to the new leg first. The event must be issued on the old leg as

    //all previous events are suppressed.

    //

    if( (aState == MCCPCallObserver::ECCPStateDisconnecting ||

            aState == MCCPCallObserver::ECCPStateIdle) &&

            aCall == aContext.SecondaryCall() &&

            aContext.PrimaryCall()->State() != MCCPCallObserver::ECCPStateIdle &&

            aContext.PrimaryCall()->State() != MCCPCallObserver::ECCPStateConnected )

        {

        RUBY_DEBUG1( "TVccStateCalling::InspectChangedStates -\

                forward the events on the old leg, suppress from new one: %d", aState );

        //remove progress bar from UI

        TRAP_IGNORE( aContext.Notifier().NotifySubscriberL( EVccCsToPsHoFailure, KErrGeneral ) );

        (aCallee->*aCallback)( aState, aContext.PrimaryCall());

        }

    //old leg is released in remote disconnect or other abnormal case, this should never

    //happen in the successfull HO case.

    else if( aState == MCCPCallObserver::ECCPStateIdle &&

                    aCall == aContext.PrimaryCall() )

        {       

        RUBY_DEBUG1( "TVccStateCalling::InspectChangedStates - shouldnt happen in normal HO case,\

                      MT disconnected the call, or some other abnormal case: %d", aState );

        //remove progress bar from UI

        TRAP_IGNORE( aContext.Notifier().NotifySubscriberL( EVccCsToPsHoFailure, KErrGeneral ) );

        (aCallee->*aCallback)( aState, aContext.PrimaryCall() );

        aContext.SetState( *iInit );

        }

    }