// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_

#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/services/gcm/gcm_app_handler.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "extensions/browser/browser_context_keyed_api_factory.h"
#include "google_apis/gcm/gcm_client.h"

class Profile;
namespace content {
class BrowserContext;
}
namespace gcm {
class GCMProfileService;
}

namespace extensions {

class GcmJsEventRouter;

// Defines the interface to provide handling logic for a given app.
class ExtensionGCMAppHandler : public gcm::GCMAppHandler,
                               public BrowserContextKeyedAPI,
                               public content::NotificationObserver {
 public:
  explicit ExtensionGCMAppHandler(content::BrowserContext* context);
  virtual ~ExtensionGCMAppHandler();

  // BrowserContextKeyedAPI implementation.
  static BrowserContextKeyedAPIFactory<ExtensionGCMAppHandler>*
  GetFactoryInstance();

  // gcm::GCMAppHandler implementation.
  virtual void ShutdownHandler() OVERRIDE;
  virtual void OnMessage(
      const std::string& app_id,
      const gcm::GCMClient::IncomingMessage& message) OVERRIDE;
  virtual void OnMessagesDeleted(const std::string& app_id) OVERRIDE;
  virtual void OnSendError(
      const std::string& app_id,
      const gcm::GCMClient::SendErrorDetails& send_error_details) OVERRIDE;

 protected:
  virtual void OnUnregisterCompleted(const std::string& app_id,
                                     gcm::GCMClient::Result result);

 private:
  friend class BrowserContextKeyedAPIFactory<ExtensionGCMAppHandler>;

  // content::NotificationObserver implementation.
  virtual void Observe(int type,
                       const content::NotificationSource& source,
                       const content::NotificationDetails& details) OVERRIDE;

  gcm::GCMProfileService* GetGCMProfileService() const;

  // BrowserContextKeyedAPI implementation.
  static const char* service_name() { return "ExtensionGCMAppHandler"; }
  static const bool kServiceIsNULLWhileTesting = true;

  Profile* profile_;
  content::NotificationRegistrar registrar_;

#if !defined(OS_ANDROID)
  scoped_ptr<extensions::GcmJsEventRouter> js_event_router_;
#endif

  base::WeakPtrFactory<ExtensionGCMAppHandler> weak_factory_;

  DISALLOW_COPY_AND_ASSIGN(ExtensionGCMAppHandler);
};

}  // namespace extensions

#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_