// 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 UI_MESSAGE_CENTER_NOTIFICATION_H_
#define UI_MESSAGE_CENTER_NOTIFICATION_H_

#include <string>
#include <vector>

#include "base/string16.h"
#include "base/time.h"
#include "base/values.h"
#include "ui/gfx/image/image.h"
#include "ui/message_center/message_center_export.h"
#include "ui/message_center/notification_delegate.h"
#include "ui/message_center/notification_types.h"

namespace message_center {

struct MESSAGE_CENTER_EXPORT NotificationItem {
  string16 title;
  string16 message;

  NotificationItem(const string16& title, const string16& message);
};

struct MESSAGE_CENTER_EXPORT ButtonInfo {
  string16 title;
  gfx::Image icon;

  ButtonInfo(const string16& title);
};

class MESSAGE_CENTER_EXPORT RichNotificationData {
 public:
  RichNotificationData();
  RichNotificationData(const RichNotificationData& other);
  ~RichNotificationData();

  int priority;
  bool never_timeout;
  base::Time timestamp;
  string16 expanded_message;
  gfx::Image image;
  std::vector<NotificationItem> items;
  std::vector<ButtonInfo> buttons;
};

class MESSAGE_CENTER_EXPORT Notification {
 public:
  Notification(NotificationType type,
               const std::string& id,
               const string16& title,
               const string16& message,
               const gfx::Image& icon,
               const string16& display_source,
               const std::string& extension_id,
               const DictionaryValue* optional_fields,  // May be NULL.
               NotificationDelegate* delegate);         // May be NULL.

  Notification(NotificationType type,
               const std::string& id,
               const string16& title,
               const string16& message,
               const gfx::Image& icon,
               const string16& display_source,
               const std::string& extension_id,
               const RichNotificationData& optional_fields,
               NotificationDelegate* delegate);

  Notification(const Notification& other);
  Notification& operator=(const Notification& other);
  virtual ~Notification();

  // Copies the internal on-memory state from |base|, i.e. shown_as_popup,
  // is_read, is_expanded, and never_timeout.
  void CopyState(Notification* base);

  NotificationType type() const { return type_; }
  const std::string& id() const { return id_; }
  const string16& title() const { return title_; }
  const string16& message() const { return message_; }

  // A display string for the source of the notification.
  const string16& display_source() const { return display_source_; }
  const std::string& extension_id() const { return extension_id_; }
  void set_extension_id(const std::string& extension_id) {
    extension_id_ = extension_id;
  }

  // Begin unpacked values from optional_fields.
  int priority() const { return optional_fields_.priority; }
  base::Time timestamp() const { return optional_fields_.timestamp; }
  const string16& expanded_message() const {
    return optional_fields_.expanded_message;
  }
  const std::vector<NotificationItem>& items() const {
    return optional_fields_.items;
  }
  // End unpacked values.

  // Images fetched asynchronously.
  const gfx::Image& icon() const { return icon_; }
  void set_icon(const gfx::Image& icon) { icon_ = icon; }

  const gfx::Image& image() const { return optional_fields_.image; }
  void set_image(const gfx::Image& image) { optional_fields_.image = image; }

  // Buttons, with icons fetched asynchronously.
  const std::vector<ButtonInfo>& buttons() const {
    return optional_fields_.buttons;
  }
  void SetButtonIcon(size_t index, const gfx::Image& icon);

  bool shown_as_popup() const { return shown_as_popup_; }
  void set_shown_as_popup(bool shown_as_popup) {
    shown_as_popup_ = shown_as_popup;
  }

  // Read status in the message center.
  bool is_read() const { return is_read_; }
  void set_is_read(bool read) { is_read_ = read; }

  // Expanded status in the message center (not the popups).
  bool is_expanded() const { return is_expanded_; }
  void set_is_expanded(bool expanded) { is_expanded_ = expanded; }

  // Used to keep the order of notifications with the same timestamp.
  // The notification with lesser serial_number is considered 'older'.
  unsigned serial_number() { return serial_number_; }

  // Marks this explicitly to prevent the timeout dismiss of notification.
  // This is used by webkit notifications to keep the existing behavior.
  void set_never_timeout(bool never_timeout) {
    optional_fields_.never_timeout = never_timeout;
  }

  bool never_timeout() const { return optional_fields_.never_timeout; }
  NotificationDelegate* delegate() const { return delegate_.get(); }
  const RichNotificationData& rich_notification_data() const {
    return optional_fields_;
  }

  // Delegate actions.
  void Display() const { delegate()->Display(); }
  void Error() const { delegate()->Error(); }
  bool HasClickedListener() const { return delegate()->HasClickedListener(); }
  void Click() const { delegate()->Click(); }
  void ButtonClick(int index) const { delegate()->ButtonClick(index); }
  void Close(bool by_user) const { delegate()->Close(by_user); }

 protected:
  // The type of notification we'd like displayed.
  NotificationType type_;

  std::string id_;
  string16 title_;
  string16 message_;

  // Image data for the associated icon, used by Ash when available.
  gfx::Image icon_;

  // The display string for the source of the notification.  Could be
  // the same as origin_url_, or the name of an extension.
  string16 display_source_;

 private:
  // Unpacks the provided |optional_fields| and applies the values to override
  // the notification's data members.
  void ApplyOptionalFields(const DictionaryValue* optional_fields);

  std::string extension_id_;
  unsigned serial_number_;
  RichNotificationData optional_fields_;
  bool shown_as_popup_;  // True if this has been shown as a popup.
  bool is_read_;  // True if this has been seen in the message center.
  bool is_expanded_;  // True if this has been expanded in the message center.

  // A proxy object that allows access back to the JavaScript object that
  // represents the notification, for firing events.
  scoped_refptr<NotificationDelegate> delegate_;
};

}  // namespace message_center

#endif  // UI_MESSAGE_CENTER_NOTIFICATION_H_