// Copyright 2016 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_SETTINGS_IMPORT_DATA_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_SETTINGS_IMPORT_DATA_HANDLER_H_

#include <stdint.h>

#include <memory>

#include "base/memory/raw_ptr.h"
#include "chrome/browser/importer/importer_progress_observer.h"
#include "chrome/browser/ui/webui/settings/settings_page_ui_handler.h"
#include "components/user_data_importer/common/importer_data_types.h"
#include "ui/shell_dialogs/select_file_dialog.h"

class ExternalProcessImporterHost;
class ImporterList;

namespace settings {

// Chrome personal stuff import data overlay UI handler.
class ImportDataHandler : public SettingsPageUIHandler,
                          public importer::ImporterProgressObserver,
                          public ui::SelectFileDialog::Listener {
 public:
  ImportDataHandler();

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

  ~ImportDataHandler() override;

  // SettingsPageUIHandler
  void RegisterMessages() override;
  void OnJavascriptAllowed() override {}
  void OnJavascriptDisallowed() override;

 private:
  void StartImport(const user_data_importer::SourceProfile& source_profile,
                   uint16_t imported_items);

  // Handler for the "importData" message. First argument is the selected
  // browser index, and second argument is the types of data to import.
  void HandleImportData(const base::Value::List& args);

  // Handler for the "initializeImportDialog" message. First argument is a
  // callback id.
  void HandleInitializeImportDialog(const base::Value::List& args);

  // Handler for the "importFromBookmarksFile" message. Opens a file selection
  // dialog to choose the bookmarks HTML file.
  void HandleImportFromBookmarksFile(const base::Value::List& args);

  void SendBrowserProfileData(const std::string& callback_id);

  // importer::ImporterProgressObserver:
  void ImportStarted() override;
  void ImportItemStarted(user_data_importer::ImportItem item) override;
  void ImportItemEnded(user_data_importer::ImportItem item) override;
  void ImportEnded() override;

  // ui::SelectFileDialog::Listener:
  void FileSelected(const ui::SelectedFileInfo& file, int index) override;
  void FileSelectionCanceled() override;

  std::unique_ptr<ImporterList> importer_list_;

  // If non-null it means importing is in progress. ImporterHost takes care
  // of deleting itself when import is complete.
  raw_ptr<ExternalProcessImporterHost> importer_host_;  // weak

  bool import_did_succeed_{false};
  bool importer_list_loaded_{false};

  scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
};

}  // namespace settings

#endif  // CHROME_BROWSER_UI_WEBUI_SETTINGS_IMPORT_DATA_HANDLER_H_