/* -*- 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 "RemoteServiceWorkerContainerImpl.h"

#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/ipc/PBackgroundChild.h"
#include "ServiceWorkerContainerChild.h"

namespace mozilla {
namespace dom {

using mozilla::ipc::BackgroundChild;
using mozilla::ipc::PBackgroundChild;
using mozilla::ipc::ResponseRejectReason;

RemoteServiceWorkerContainerImpl::~RemoteServiceWorkerContainerImpl() {
  Shutdown();
  MOZ_DIAGNOSTIC_ASSERT(!mOuter);
}

void RemoteServiceWorkerContainerImpl::Shutdown() {
  if (mShutdown) {
    return;
  }
  mShutdown = true;

  if (mActor) {
    mActor->RevokeOwner(this);
    mActor->MaybeStartTeardown();
    mActor = nullptr;
  }
}

void RemoteServiceWorkerContainerImpl::AddContainer(
    ServiceWorkerContainer* aOuter) {
  MOZ_DIAGNOSTIC_ASSERT(aOuter);
  MOZ_DIAGNOSTIC_ASSERT(!mOuter);
  mOuter = aOuter;
}

void RemoteServiceWorkerContainerImpl::RemoveContainer(
    ServiceWorkerContainer* aOuter) {
  MOZ_DIAGNOSTIC_ASSERT(aOuter);
  MOZ_DIAGNOSTIC_ASSERT(mOuter == aOuter);
  mOuter = nullptr;
}

void RemoteServiceWorkerContainerImpl::Register(
    const ClientInfo& aClientInfo, const nsACString& aScopeURL,
    const nsACString& aScriptURL, ServiceWorkerUpdateViaCache aUpdateViaCache,
    ServiceWorkerRegistrationCallback&& aSuccessCB,
    ServiceWorkerFailureCallback&& aFailureCB) const {
  if (!mActor) {
    CopyableErrorResult rv;
    rv.ThrowInvalidStateError("Can't register service worker");
    aFailureCB(std::move(rv));
    return;
  }

  mActor->SendRegister(
      aClientInfo.ToIPC(), nsCString(aScopeURL), nsCString(aScriptURL),
      aUpdateViaCache,
      [successCB = std::move(aSuccessCB), aFailureCB](
          const IPCServiceWorkerRegistrationDescriptorOrCopyableErrorResult&
              aResult) {
        if (aResult.type() ==
            IPCServiceWorkerRegistrationDescriptorOrCopyableErrorResult::
                TCopyableErrorResult) {
          // application layer error
          auto& rv = aResult.get_CopyableErrorResult();
          MOZ_DIAGNOSTIC_ASSERT(rv.Failed());
          aFailureCB(CopyableErrorResult(rv));
          return;
        }
        // success
        auto& ipcDesc = aResult.get_IPCServiceWorkerRegistrationDescriptor();
        successCB(ServiceWorkerRegistrationDescriptor(ipcDesc));
      },
      [aFailureCB](ResponseRejectReason&& aReason) {
        // IPC layer error
        CopyableErrorResult rv;
        rv.ThrowInvalidStateError("Failed to register service worker");
        aFailureCB(std::move(rv));
      });
}

void RemoteServiceWorkerContainerImpl::GetRegistration(
    const ClientInfo& aClientInfo, const nsACString& aURL,
    ServiceWorkerRegistrationCallback&& aSuccessCB,
    ServiceWorkerFailureCallback&& aFailureCB) const {
  if (!mActor) {
    aFailureCB(CopyableErrorResult(NS_ERROR_DOM_INVALID_STATE_ERR));
    return;
  }

  mActor->SendGetRegistration(
      aClientInfo.ToIPC(), nsCString(aURL),
      [successCB = std::move(aSuccessCB), aFailureCB](
          const IPCServiceWorkerRegistrationDescriptorOrCopyableErrorResult&
              aResult) {
        if (aResult.type() ==
            IPCServiceWorkerRegistrationDescriptorOrCopyableErrorResult::
                TCopyableErrorResult) {
          auto& rv = aResult.get_CopyableErrorResult();
          // If rv is a failure then this is an application layer error.  Note,
          // though, we also reject with NS_OK to indicate that we just didn't
          // find a registration.
          aFailureCB(CopyableErrorResult(rv));
          return;
        }
        // success
        auto& ipcDesc = aResult.get_IPCServiceWorkerRegistrationDescriptor();
        successCB(ServiceWorkerRegistrationDescriptor(ipcDesc));
      },
      [aFailureCB](ResponseRejectReason&& aReason) {
        // IPC layer error
        aFailureCB(CopyableErrorResult(NS_ERROR_DOM_INVALID_STATE_ERR));
      });
}

void RemoteServiceWorkerContainerImpl::GetRegistrations(
    const ClientInfo& aClientInfo,
    ServiceWorkerRegistrationListCallback&& aSuccessCB,
    ServiceWorkerFailureCallback&& aFailureCB) const {
  if (!mActor) {
    aFailureCB(CopyableErrorResult(NS_ERROR_DOM_INVALID_STATE_ERR));
    return;
  }

  mActor->SendGetRegistrations(
      aClientInfo.ToIPC(),
      [successCB = std::move(aSuccessCB), aFailureCB](
          const IPCServiceWorkerRegistrationDescriptorListOrCopyableErrorResult&
              aResult) {
        if (aResult.type() ==
            IPCServiceWorkerRegistrationDescriptorListOrCopyableErrorResult::
                TCopyableErrorResult) {
          // application layer error
          auto& rv = aResult.get_CopyableErrorResult();
          MOZ_DIAGNOSTIC_ASSERT(rv.Failed());
          aFailureCB(CopyableErrorResult(rv));
          return;
        }
        // success
        auto& ipcList =
            aResult.get_IPCServiceWorkerRegistrationDescriptorList();
        nsTArray<ServiceWorkerRegistrationDescriptor> list(
            ipcList.values().Length());
        for (auto& ipcDesc : ipcList.values()) {
          list.AppendElement(ServiceWorkerRegistrationDescriptor(ipcDesc));
        }
        successCB(std::move(list));
      },
      [aFailureCB](ResponseRejectReason&& aReason) {
        // IPC layer error
        aFailureCB(CopyableErrorResult(NS_ERROR_DOM_INVALID_STATE_ERR));
      });
}

void RemoteServiceWorkerContainerImpl::GetReady(
    const ClientInfo& aClientInfo,
    ServiceWorkerRegistrationCallback&& aSuccessCB,
    ServiceWorkerFailureCallback&& aFailureCB) const {
  if (!mActor) {
    aFailureCB(CopyableErrorResult(NS_ERROR_DOM_INVALID_STATE_ERR));
    return;
  }

  mActor->SendGetReady(
      aClientInfo.ToIPC(),
      [successCB = std::move(aSuccessCB), aFailureCB](
          const IPCServiceWorkerRegistrationDescriptorOrCopyableErrorResult&
              aResult) {
        if (aResult.type() ==
            IPCServiceWorkerRegistrationDescriptorOrCopyableErrorResult::
                TCopyableErrorResult) {
          // application layer error
          auto& rv = aResult.get_CopyableErrorResult();
          MOZ_DIAGNOSTIC_ASSERT(rv.Failed());
          aFailureCB(CopyableErrorResult(rv));
          return;
        }
        // success
        auto& ipcDesc = aResult.get_IPCServiceWorkerRegistrationDescriptor();
        successCB(ServiceWorkerRegistrationDescriptor(ipcDesc));
      },
      [aFailureCB](ResponseRejectReason&& aReason) {
        // IPC layer error
        aFailureCB(CopyableErrorResult(NS_ERROR_DOM_INVALID_STATE_ERR));
      });
}

RemoteServiceWorkerContainerImpl::RemoteServiceWorkerContainerImpl()
    : mActor(nullptr), mOuter(nullptr), mShutdown(false) {
  PBackgroundChild* parentActor =
      BackgroundChild::GetOrCreateForCurrentThread();
  if (NS_WARN_IF(!parentActor)) {
    Shutdown();
    return;
  }

  ServiceWorkerContainerChild* actor = ServiceWorkerContainerChild::Create();
  if (NS_WARN_IF(!actor)) {
    Shutdown();
    return;
  }

  PServiceWorkerContainerChild* sentActor =
      parentActor->SendPServiceWorkerContainerConstructor(actor);
  if (NS_WARN_IF(!sentActor)) {
    Shutdown();
    return;
  }
  MOZ_DIAGNOSTIC_ASSERT(sentActor == actor);

  mActor = actor;
  mActor->SetOwner(this);
}

void RemoteServiceWorkerContainerImpl::RevokeActor(
    ServiceWorkerContainerChild* aActor) {
  MOZ_DIAGNOSTIC_ASSERT(mActor);
  MOZ_DIAGNOSTIC_ASSERT(mActor == aActor);
  mActor->RevokeOwner(this);
  mActor = nullptr;

  mShutdown = true;
}

}  // namespace dom
}  // namespace mozilla