/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */


#include "nsCOMPtr.h"
#include "nsAbLDAPReplicationService.h"
#include "nsAbLDAPReplicationQuery.h"
#include "nsAbBaseCID.h"
#include "nsIWebProgressListener.h"
#include "nsComponentManagerUtils.h"
#include "nsServiceManagerUtils.h"

// XXX Change log replication doesn't work. Bug 311632 should fix it.
//#include "nsAbLDAPChangeLogQuery.h"
#include "nsIAbLDAPReplicationData.h"

/*** implementation of the service ******/

NS_IMPL_ISUPPORTS(nsAbLDAPReplicationService, nsIAbLDAPReplicationService)

nsAbLDAPReplicationService::nsAbLDAPReplicationService() 
    : mReplicating(false)
{
}

nsAbLDAPReplicationService::~nsAbLDAPReplicationService()
{
}

/* void startReplication(in string aURI, in nsIWebProgressListener progressListener); */
NS_IMETHODIMP nsAbLDAPReplicationService::StartReplication(nsIAbLDAPDirectory *aDirectory,
							   nsIWebProgressListener *progressListener)
{
  NS_ENSURE_ARG_POINTER(aDirectory);

#ifdef DEBUG_rdayal
  printf("Start Replication called");
#endif

  // Makes sure to allow only one replication at a time.
  if(mReplicating)
    return NS_ERROR_FAILURE;

  mDirectory = aDirectory;

  nsresult rv = NS_ERROR_NOT_IMPLEMENTED;

  switch (DecideProtocol())
  {
  case nsIAbLDAPProcessReplicationData::kDefaultDownloadAll:
    mQuery = do_CreateInstance(NS_ABLDAP_REPLICATIONQUERY_CONTRACTID, &rv);
    break;
// XXX Change log replication doesn't work. Bug 311632 should fix it.
//case nsIAbLDAPProcessReplicationData::kChangeLogProtocol:
//  mQuery = do_CreateInstance (NS_ABLDAP_CHANGELOGQUERY_CONTRACTID, &rv);
//  break;
  default:
    break;
  }

  if (NS_SUCCEEDED(rv) && mQuery)
  {
    rv = mQuery->Init(mDirectory, progressListener);
    if (NS_SUCCEEDED(rv))
    {
      rv = mQuery->DoReplicationQuery();
      if (NS_SUCCEEDED(rv))
	{
	  mReplicating = true;
	  return rv;
	}
    }
  }

  if (progressListener && NS_FAILED(rv))
    progressListener->OnStateChange(nullptr, nullptr,
				    nsIWebProgressListener::STATE_STOP,
				    NS_OK);

  if (NS_FAILED(rv))
  {
    mDirectory = nullptr;
    mQuery = nullptr;
  }

  return rv;
}

/* void cancelReplication(in string aURI); */
NS_IMETHODIMP nsAbLDAPReplicationService::CancelReplication(nsIAbLDAPDirectory *aDirectory)
{
  NS_ENSURE_ARG_POINTER(aDirectory);

  nsresult rv = NS_ERROR_FAILURE;

  if (aDirectory == mDirectory)
  {
    if (mQuery && mReplicating)
      rv = mQuery->CancelQuery();  
  }

  // If query has been cancelled successfully
  if (NS_SUCCEEDED(rv))
    Done(false);

  return rv;
}

NS_IMETHODIMP nsAbLDAPReplicationService::Done(bool aSuccess)
{
  mReplicating = false;
  if (mQuery)
  {
    mQuery = nullptr;  // Release query obj
    mDirectory = nullptr; // Release directory
  }

  return NS_OK;
}


// XXX: This method should query the RootDSE for the changeLog attribute,
// if it exists ChangeLog protocol is supported.
int32_t nsAbLDAPReplicationService::DecideProtocol()
{
  // Do the changeLog, it will decide if there is a need to replicate all
  // entries or only update existing DB and will do the appropriate thing.
  //
  // XXX: Bug 231965 changed this from kChangeLogProtocol to
  // kDefaultDownloadAll because of a problem with ldap replication not
  // working correctly. We need to change this back at some stage (bug 311632).
  return nsIAbLDAPProcessReplicationData::kDefaultDownloadAll;
}