/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/dom/voicemail/VoicemailIPCService.h"

#include "mozilla/dom/ContentChild.h"
#include "mozilla/Preferences.h"
#include "nsIMobileConnectionService.h"
#include "nsServiceManagerUtils.h"

namespace mozilla {
namespace dom {
namespace voicemail {

class VoicemailIPCProvider final : public nsIVoicemailProvider
{
  friend class VoicemailIPCService;

public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIVOICEMAILPROVIDER

  explicit VoicemailIPCProvider(uint32_t aServiceId);

private:
  // final suppresses -Werror,-Wdelete-non-virtual-dtor
  ~VoicemailIPCProvider() {}

private:
  uint32_t mServiceId;
  nsString mNumber;
  nsString mDisplayName;
  bool mHasMessages;
  int32_t mMessageCount;
  nsString mReturnNumber;
  nsString mReturnMessage;
};

NS_IMPL_ISUPPORTS(VoicemailIPCProvider, nsIVoicemailProvider)

VoicemailIPCProvider::VoicemailIPCProvider(uint32_t aServiceId)
  : mServiceId(aServiceId)
  , mHasMessages(false)
  , mMessageCount(0)
{
}

// nsIVoicemailProvider

NS_IMETHODIMP
VoicemailIPCProvider::GetServiceId(uint32_t* aServiceId)
{
  NS_ENSURE_ARG_POINTER(aServiceId);

  *aServiceId = mServiceId;
  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCProvider::GetNumber(nsAString& aNumber)
{
  aNumber = mNumber;
  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCProvider::GetDisplayName(nsAString& aDisplayName)
{
  aDisplayName = mDisplayName;
  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCProvider::GetHasMessages(bool* aHasMessages)
{
  NS_ENSURE_ARG_POINTER(aHasMessages);

  *aHasMessages = mHasMessages;
  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCProvider::GetMessageCount(int32_t* aMessageCount)
{
  NS_ENSURE_ARG_POINTER(aMessageCount);

  *aMessageCount = mMessageCount;
  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCProvider::GetReturnNumber(nsAString& aReturnNumber)
{
  aReturnNumber = mReturnNumber;
  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCProvider::GetReturnMessage(nsAString& aReturnMessage)
{
  aReturnMessage = mReturnMessage;
  return NS_OK;
}

NS_IMPL_ISUPPORTS(VoicemailIPCService, nsIVoicemailService)

VoicemailIPCService::VoicemailIPCService()
  : mActorDestroyed(false)
{
  ContentChild::GetSingleton()->SendPVoicemailConstructor(this);

  nsCOMPtr<nsIMobileConnectionService> mcService =
    do_GetService(NS_MOBILE_CONNECTION_SERVICE_CONTRACTID);
  if (mcService) {
    uint32_t length = 0;
    if (NS_SUCCEEDED(mcService->GetNumItems(&length))) {
      mProviders.SetLength(length);
    }
  }
}

VoicemailIPCService::~VoicemailIPCService()
{
  if (!mActorDestroyed) {
    Send__delete__(this);
  }
}

// PVoicemailChild

bool
VoicemailIPCService::RecvNotifyInfoChanged(const uint32_t& aServiceId,
                                           const nsString& aNumber,
                                           const nsString& aDisplayName)
{
  nsCOMPtr<nsIVoicemailProvider> provider;
  NS_ENSURE_SUCCESS(GetItemByServiceId(aServiceId, getter_AddRefs(provider)), false);

  VoicemailIPCProvider* pProvider =
    static_cast<VoicemailIPCProvider*>(provider.get());
  pProvider->mNumber = aNumber;
  pProvider->mDisplayName = aDisplayName;

  // Listeners may unregister itself upon a info changed event, so we make a
  // copy first.
  nsTArray<nsCOMPtr<nsIVoicemailListener>> copy(mListeners);
  for (uint32_t i = 0; i < copy.Length(); i++) {
    copy[i]->NotifyInfoChanged(provider);
  }

  return true;
}

bool
VoicemailIPCService::RecvNotifyStatusChanged(const uint32_t& aServiceId,
                                             const bool& aHasMessages,
                                             const int32_t& aMessageCount,
                                             const nsString& aReturnNumber,
                                             const nsString& aReturnMessage)
{
  nsCOMPtr<nsIVoicemailProvider> provider;
  NS_ENSURE_SUCCESS(GetItemByServiceId(aServiceId, getter_AddRefs(provider)), false);

  VoicemailIPCProvider* pProvider =
    static_cast<VoicemailIPCProvider*>(provider.get());
  pProvider->mHasMessages = aHasMessages;
  pProvider->mMessageCount = aMessageCount;
  pProvider->mReturnNumber = aReturnNumber;
  pProvider->mReturnMessage = aReturnMessage;

  // Listeners may unregister itself upon a info changed event, so we make a
  // copy first.
  nsTArray<nsCOMPtr<nsIVoicemailListener>> copy(mListeners);
  for (uint32_t i = 0; i < copy.Length(); i++) {
    copy[i]->NotifyStatusChanged(provider);
  }

  return true;
}

void
VoicemailIPCService::ActorDestroy(ActorDestroyReason aWhy)
{
  mActorDestroyed = true;
}

// nsIVoicemailService

NS_IMETHODIMP
VoicemailIPCService::GetNumItems(uint32_t* aNumItems)
{
  NS_ENSURE_ARG_POINTER(aNumItems);

  *aNumItems = mProviders.Length();

  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCService::GetItemByServiceId(uint32_t aServiceId,
                                        nsIVoicemailProvider** aProvider)
{
  NS_ENSURE_ARG(aServiceId < mProviders.Length());
  NS_ENSURE_ARG_POINTER(aProvider);

  if (!mProviders[aServiceId]) {
    RefPtr<VoicemailIPCProvider> provider =
      new VoicemailIPCProvider(aServiceId);
    if (!SendGetAttributes(aServiceId,
                           &(provider->mNumber),
                           &(provider->mDisplayName),
                           &(provider->mHasMessages),
                           &(provider->mMessageCount),
                           &(provider->mReturnNumber),
                           &(provider->mReturnMessage))) {
      return NS_ERROR_FAILURE;
    }

    mProviders[aServiceId] = provider;
  }

  RefPtr<nsIVoicemailProvider> provider(mProviders[aServiceId]);
  provider.forget(aProvider);

  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCService::GetDefaultItem(nsIVoicemailProvider** aProvider)
{
  NS_ENSURE_ARG_POINTER(aProvider);

  int defaultServiceId =
    Preferences::GetInt("dom.voicemail.defaultServiceId", 0);
  return GetItemByServiceId(defaultServiceId, aProvider);
}

NS_IMETHODIMP
VoicemailIPCService::RegisterListener(nsIVoicemailListener* aListener)
{
  NS_ENSURE_TRUE(!mActorDestroyed, NS_ERROR_UNEXPECTED);
  NS_ENSURE_TRUE(!mListeners.Contains(aListener), NS_ERROR_UNEXPECTED);

  mListeners.AppendElement(aListener);
  return NS_OK;
}

NS_IMETHODIMP
VoicemailIPCService::UnregisterListener(nsIVoicemailListener* aListener)
{
  NS_ENSURE_TRUE(!mActorDestroyed, NS_ERROR_UNEXPECTED);

  return mListeners.RemoveElement(aListener) ? NS_OK : NS_ERROR_UNEXPECTED;
}

} // namespace voicemail
} // namespace dom
} // namespace mozilla