// Copyright (c) 2013 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 CHROMEOS_LOGIN_LOGIN_STATE_H_
#define CHROMEOS_LOGIN_LOGIN_STATE_H_

#include "base/basictypes.h"
#include "base/observer_list.h"
#include "chromeos/chromeos_export.h"

namespace chromeos {

// Tracks the login state of chrome, accessible to Ash and other chromeos code.
class CHROMEOS_EXPORT LoginState {
 public:
  enum LoggedInState {
    LOGGED_IN_OOBE,    // Out of box experience not completed
    LOGGED_IN_NONE,    // Not logged in
    LOGGED_IN_ACTIVE   // A user has logged in
  };

  enum LoggedInUserType {
    LOGGED_IN_USER_NONE,             // User is not logged in
    LOGGED_IN_USER_REGULAR,          // A regular user is logged in
    LOGGED_IN_USER_OWNER,            // The owner of the device is logged in
    LOGGED_IN_USER_GUEST,            // A guest is logged in (i.e. incognito)
    LOGGED_IN_USER_RETAIL_MODE,      // Is in retail mode
    LOGGED_IN_USER_PUBLIC_ACCOUNT,   // A public account is logged in
    LOGGED_IN_USER_LOCALLY_MANAGED,  // A locally managed user is logged in
    LOGGED_IN_USER_KIOSK_APP         // Is in kiosk app mode
  };

  class Observer {
   public:
    // Called when the login state changes.
    virtual void LoggedInStateChanged(LoggedInState state) = 0;

   protected:
    virtual ~Observer() {}
  };

  // Manage singleton instance.
  static void Initialize();
  static void Shutdown();
  static LoginState* Get();
  static bool IsInitialized();

  // Add/remove observers.
  void AddObserver(Observer* observer);
  void RemoveObserver(Observer* observer);

  // Set the logged in state and user type.
  void SetLoggedInState(LoggedInState state, LoggedInUserType type);

  // Get the logged in state / user type.
  LoggedInState GetLoggedInState() const;
  LoggedInUserType GetLoggedInUserType() const;

  // Returns true if |logged_in_state_| is active.
  bool IsUserLoggedIn() const;

  // Returns true if logged in and is a guest, retail, public, or kiosk user.
  bool IsGuestUser() const;

  // Returns true if the user is an authenticated user (i.e. non public account)
  bool IsUserAuthenticated() const;

  // Returns true if the user is authenticated by logging into Google account
  // (i.e., non public nor locally managed account).
  bool IsUserGaiaAuthenticated() const;

 private:
  LoginState();
  virtual ~LoginState();

  void NotifyObservers();

  LoggedInState logged_in_state_;
  LoggedInUserType logged_in_user_type_;
  ObserverList<Observer> observer_list_;

  DISALLOW_COPY_AND_ASSIGN(LoginState);
};

}  // namespace chromeos

#endif  // CHROMEOS_LOGIN_LOGIN_STATE_H_