/* -*- 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 "GamepadEventChannelChild.h"
#include "mozilla/dom/GamepadManager.h"
#include "mozilla/dom/Promise.h"

namespace mozilla::dom {

namespace {

class GamepadUpdateRunnable final : public Runnable {
 public:
  explicit GamepadUpdateRunnable(const GamepadChangeEvent& aGamepadEvent)
      : Runnable("dom::GamepadUpdateRunnable"), mEvent(aGamepadEvent) {}
  NS_IMETHOD Run() override {
    RefPtr<GamepadManager> svc(GamepadManager::GetService());
    if (svc) {
      svc->Update(mEvent);
    }
    return NS_OK;
  }

 protected:
  GamepadChangeEvent mEvent;
};

}  // namespace

already_AddRefed<GamepadEventChannelChild> GamepadEventChannelChild::Create() {
  return RefPtr<GamepadEventChannelChild>(new GamepadEventChannelChild())
      .forget();
}

mozilla::ipc::IPCResult GamepadEventChannelChild::RecvGamepadUpdate(
    const GamepadChangeEvent& aGamepadEvent) {
  DebugOnly<nsresult> rv =
      NS_DispatchToMainThread(new GamepadUpdateRunnable(aGamepadEvent));
  NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "NS_DispatchToMainThread failed");
  return IPC_OK();
}

void GamepadEventChannelChild::AddPromise(const uint32_t& aID,
                                          dom::Promise* aPromise) {
  MOZ_ASSERT(!mPromiseList.Get(aID, nullptr));
  mPromiseList.Put(aID, RefPtr{aPromise});
}

mozilla::ipc::IPCResult GamepadEventChannelChild::RecvReplyGamepadPromise(
    const uint32_t& aPromiseID) {
  RefPtr<dom::Promise> p;
  if (!mPromiseList.Get(aPromiseID, getter_AddRefs(p))) {
    MOZ_CRASH("We should always have a promise.");
  }

  p->MaybeResolve(true);
  mPromiseList.Remove(aPromiseID);
  return IPC_OK();
}

}  // namespace mozilla::dom