// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#ifndef SHELL_BROWSER_API_ELECTRON_API_POWER_MONITOR_H_
#define SHELL_BROWSER_API_ELECTRON_API_POWER_MONITOR_H_

#include "base/compiler_specific.h"
#include "native_mate/handle.h"
#include "shell/browser/api/trackable_object.h"
#include "shell/browser/lib/power_observer.h"
#include "ui/base/idle/idle.h"

namespace electron {

namespace api {

class PowerMonitor : public mate::TrackableObject<PowerMonitor>,
                     public PowerObserver {
 public:
  static v8::Local<v8::Value> Create(v8::Isolate* isolate);

  static void BuildPrototype(v8::Isolate* isolate,
                             v8::Local<v8::FunctionTemplate> prototype);

 protected:
  explicit PowerMonitor(v8::Isolate* isolate);
  ~PowerMonitor() override;

  // Called by native calles.
  bool ShouldShutdown();

#if defined(OS_LINUX)
  // Private JS APIs.
  void BlockShutdown();
  void UnblockShutdown();
#endif

#if defined(OS_MACOSX) || defined(OS_WIN)
  void InitPlatformSpecificMonitors();
#endif

  // base::PowerObserver implementations:
  void OnPowerStateChange(bool on_battery_power) override;
  void OnSuspend() override;
  void OnResume() override;

 private:
  ui::IdleState GetSystemIdleState(v8::Isolate* isolate, int idle_threshold);
  int GetSystemIdleTime();

#if defined(OS_WIN)
  // Static callback invoked when a message comes in to our messaging window.
  static LRESULT CALLBACK WndProcStatic(HWND hwnd,
                                        UINT message,
                                        WPARAM wparam,
                                        LPARAM lparam);

  LRESULT CALLBACK WndProc(HWND hwnd,
                           UINT message,
                           WPARAM wparam,
                           LPARAM lparam);

  // The window class of |window_|.
  ATOM atom_;

  // The handle of the module that contains the window procedure of |window_|.
  HMODULE instance_;

  // The window used for processing events.
  HWND window_;
#endif

  DISALLOW_COPY_AND_ASSIGN(PowerMonitor);
};

}  // namespace api

}  // namespace electron

#endif  // SHELL_BROWSER_API_ELECTRON_API_POWER_MONITOR_H_
