// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_UI_WEBUI_ASH_LOGIN_WELCOME_SCREEN_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_ASH_LOGIN_WELCOME_SCREEN_HANDLER_H_

#include <memory>
#include <string>

#include "base/memory/weak_ptr.h"
#include "base/values.h"
#include "chrome/browser/ui/webui/ash/login/base_screen_handler.h"

namespace ash {

class WelcomeScreen;

// Interface for WelcomeScreenHandler.
class WelcomeView {
 public:
  inline constexpr static StaticOobeScreenId kScreenId{"connect",
                                                       "WelcomeScreen"};

  virtual ~WelcomeView() = default;

  // Shows the contents of the screen.
  virtual void Show() = 0;

  // Sets language list and reloads localized contents.
  virtual void SetLanguageList(base::ListValue language_list) = 0;

  // Change the current input method.
  virtual void SetInputMethodId(const std::string& input_method_id) = 0;

  // Shows dialog to confirm starting Demo mode.
  virtual void ShowDemoModeConfirmationDialog() = 0;
  virtual void ShowEditRequisitionDialog(const std::string& requisition) = 0;
  virtual void ShowRemoraRequisitionDialog() = 0;

  // ChromeVox hint.
  virtual void GiveChromeVoxHint() = 0;

  struct A11yState {
    // Whether or not the corresponding feature is turned on.
    const bool high_contrast;
    const bool large_cursor;
    const bool spoken_feedback;
    const bool select_to_speak;
    const bool screen_magnifier;
    const bool docked_magnifier;
    const bool virtual_keyboard;
  };
  // Updates a11y menu state based on the current a11y features state(on/off).
  virtual void UpdateA11yState(const A11yState& state) = 0;

  virtual void SetQuickStartEnabled() = 0;

  // Gets a WeakPtr to the instance.
  virtual base::WeakPtr<WelcomeView> AsWeakPtr() = 0;
};

// WebUI implementation of WelcomeScreenView. It is used to interact with
// the welcome screen (part of the page) of the OOBE.
class WelcomeScreenHandler final : public WelcomeView,
                                   public BaseScreenHandler {
 public:
  using TView = WelcomeView;

  WelcomeScreenHandler();

  WelcomeScreenHandler(const WelcomeScreenHandler&) = delete;
  WelcomeScreenHandler& operator=(const WelcomeScreenHandler&) = delete;

  ~WelcomeScreenHandler() override;

  // WelcomeView:
  void Show() override;
  void SetLanguageList(base::ListValue language_list) override;
  void SetInputMethodId(const std::string& input_method_id) override;
  void ShowDemoModeConfirmationDialog() override;
  void ShowEditRequisitionDialog(const std::string& requisition) override;
  void ShowRemoraRequisitionDialog() override;
  void GiveChromeVoxHint() override;
  void UpdateA11yState(const A11yState& state) override;
  void SetQuickStartEnabled() override;
  base::WeakPtr<WelcomeView> AsWeakPtr() override;

  // BaseScreenHandler:
  void DeclareLocalizedValues(
      ::login::LocalizedValuesBuilder* builder) override;
  void DeclareJSCallbacks() override;
  void GetAdditionalParameters(base::DictValue* dict) override;

 private:
  // JS callbacks.
  void HandleRecordChromeVoxHintSpokenSuccess();

  // Returns available timezones.
  static base::ListValue GetTimezoneList();

  base::ListValue language_list_;

  base::WeakPtrFactory<WelcomeView> weak_ptr_factory_{this};
};

}  // namespace ash

#endif  // CHROME_BROWSER_UI_WEBUI_ASH_LOGIN_WELCOME_SCREEN_HANDLER_H_