// Copyright (c) 2010 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_SERVICE_SERVICE_PROCESS_H_
#define CHROME_SERVICE_SERVICE_PROCESS_H_
#pragma once

#include "base/gtest_prod_util.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "base/thread.h"
#include "base/waitable_event.h"

class CloudPrintProxy;
class JsonPrefStore;
class ServiceIPCServer;
namespace net {
class NetworkChangeNotifier;
}

namespace remoting {
class ChromotingHost;
class ChromotingHostContext;
class JsonHostConfig;
}

// The ServiceProcess does not inherit from ChildProcess because this
// process can live independently of the browser process.
class ServiceProcess {
 public:
  ServiceProcess();
  ~ServiceProcess();

  // Initialize the ServiceProcess with the message loop that it should run on.
  bool Initialize(MessageLoop* message_loop);
  bool Teardown();
  // TODO(sanjeevr): Change various parts of the code such as
  // net::ProxyService::CreateSystemProxyConfigService to take in
  // MessageLoopProxy* instead of MessageLoop*. When we have done that, we can
  // remove the io_thread() and file_thread() accessors and replace them with
  // io_message_loop_proxy() and file_message_loop_proxy() respectively.

  // Returns the thread that we perform I/O coordination on (network requests,
  // communication with renderers, etc.
  // NOTE: You should ONLY use this to pass to IPC or other objects which must
  // need a MessageLoop*. If you just want to post a task, use the thread's
  // message_loop_proxy() as it takes care of checking that a thread is still
  // alive, race conditions, lifetime differences etc.
  // If you still must use this, need to check the return value for NULL.
  base::Thread* io_thread() const {
    return io_thread_.get();
  }
  // Returns the thread that we perform random file operations on. For code
  // that wants to do I/O operations (not network requests or even file: URL
  // requests), this is the thread to use to avoid blocking the UI thread.
  base::Thread* file_thread() const {
    return file_thread_.get();
  }

  // A global event object that is signalled when the main thread's message
  // loop exits. This gives background threads a way to observe the main
  // thread shutting down.
  base::WaitableEvent* shutdown_event() {
    return &shutdown_event_;
  }

  CloudPrintProxy* GetCloudPrintProxy();

#if defined(ENABLE_REMOTING)
  // Return the reference to the chromoting host only if it has started.
  remoting::ChromotingHost* GetChromotingHost() { return chromoting_host_; }

  // Start running the chromoting host asynchronously.
  // Return true if chromoting host has started.
  bool StartChromotingHost();

  // Shutdown chromoting host. Return true if chromoting host was shutdown.
  // The shutdown process will happen asynchronously.
  bool ShutdownChromotingHost();
#endif

 private:
#if defined(ENABLE_REMOTING)
  FRIEND_TEST_ALL_PREFIXES(ServiceProcessTest, RunChromoting);
  FRIEND_TEST_ALL_PREFIXES(ServiceProcessTest, RunChromotingUntilShutdown);

  // Save authenication token to the json config file.
  void SaveChromotingConfig(
      const std::string& login,
      const std::string& token,
      const std::string& host_id,
      const std::string& host_name,
      const std::string& private_key);

  // Load settings for chromoting from json file.
  void LoadChromotingConfig();

  // This method is called when chromoting is shutting down. This is virtual
  // for used in the test.
  virtual void OnChromotingHostShutdown();
#endif

  scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
  scoped_ptr<base::Thread> io_thread_;
  scoped_ptr<base::Thread> file_thread_;
  scoped_ptr<CloudPrintProxy> cloud_print_proxy_;
  scoped_ptr<JsonPrefStore> service_prefs_;
  scoped_ptr<ServiceIPCServer> ipc_server_;

#if defined(ENABLE_REMOTING)
  scoped_refptr<remoting::JsonHostConfig> chromoting_config_;
  scoped_ptr<remoting::ChromotingHostContext> chromoting_context_;
  scoped_refptr<remoting::ChromotingHost> chromoting_host_;
#endif
  // An event that will be signalled when we shutdown.
  base::WaitableEvent shutdown_event_;

  // The main message loop for the service process.
  MessageLoop* main_message_loop_;

  DISALLOW_COPY_AND_ASSIGN(ServiceProcess);
};

extern ServiceProcess* g_service_process;

#endif  // CHROME_SERVICE_SERVICE_PROCESS_H_