// Copyright (c) 2010 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.

#include "chrome/browser/dom_ui/options/import_data_handler.h"

#include "app/l10n_util.h"
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/scoped_ptr.h"
#include "base/string16.h"
#include "base/string_number_conversions.h"
#include "base/string_util.h"
#include "base/thread_restrictions.h"
#include "base/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profile.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "chrome/browser/importer/importer_data_types.h"

ImportDataHandler::ImportDataHandler() : importer_host_(NULL) {
}

ImportDataHandler::~ImportDataHandler() {
  if (importer_host_)
    importer_host_->SetObserver(NULL);
}

void ImportDataHandler::GetLocalizedValues(
    DictionaryValue* localized_strings) {
  DCHECK(localized_strings);
  localized_strings->SetString("import_data_title",
      l10n_util::GetStringUTF16(IDS_IMPORT_SETTINGS_TITLE));
  localized_strings->SetString("import_from_label",
      l10n_util::GetStringUTF16(IDS_IMPORT_FROM_LABEL));
  localized_strings->SetString("import_commit",
      l10n_util::GetStringUTF16(IDS_IMPORT_COMMIT));
  localized_strings->SetString("import_description",
      l10n_util::GetStringUTF16(IDS_IMPORT_ITEMS_LABEL));
  localized_strings->SetString("import_favorites",
      l10n_util::GetStringUTF16(IDS_IMPORT_FAVORITES_CHKBOX));
  localized_strings->SetString("import_search",
      l10n_util::GetStringUTF16(IDS_IMPORT_SEARCH_ENGINES_CHKBOX));
  localized_strings->SetString("import_passwords",
      l10n_util::GetStringUTF16(IDS_IMPORT_PASSWORDS_CHKBOX));
  localized_strings->SetString("import_history",
      l10n_util::GetStringUTF16(IDS_IMPORT_HISTORY_CHKBOX));
  localized_strings->SetString("no_profile_found",
      l10n_util::GetStringUTF16(IDS_IMPORT_NO_PROFILE_FOUND));
}

void ImportDataHandler::Initialize() {
  importer_list_.reset(new ImporterList);

  // The ImporterHost object creates an ImporterList, which calls PathExists
  // one or more times.  Because we are currently in the UI thread, this will
  // trigger a DCHECK due to IO being done on the UI thread.  For now we will
  // supress the DCHECK.  See the following bug for more detail:
  // http://crbug.com/60825
  base::ThreadRestrictions::ScopedAllowIO allow_io;
  importer_list_->DetectSourceProfiles();
  int profiles_count = importer_list_->GetAvailableProfileCount();

  ListValue browser_profiles;
  if (profiles_count > 0) {
    for (int i = 0; i < profiles_count; i++) {
      const importer::ProfileInfo& source_profile =
          importer_list_->GetSourceProfileInfoAt(i);
      string16 browser_name = WideToUTF16Hack(source_profile.description);
      uint16 browser_services = source_profile.services_supported;

      DictionaryValue* browser_profile = new DictionaryValue();
      browser_profile->SetString("name", browser_name);
      browser_profile->SetInteger("index", i);
      browser_profile->SetBoolean("history",
          (browser_services & importer::HISTORY) != 0);
      browser_profile->SetBoolean("favorites",
          (browser_services & importer::FAVORITES) != 0);
      browser_profile->SetBoolean("passwords",
          (browser_services & importer::PASSWORDS) != 0);
      browser_profile->SetBoolean("search",
          (browser_services & importer::SEARCH_ENGINES) != 0);

      browser_profiles.Append(browser_profile);
    }
  }

  dom_ui_->CallJavascriptFunction(
      L"options.ImportDataOverlay.updateSupportedBrowsers",
      browser_profiles);
}

void ImportDataHandler::RegisterMessages() {
  dom_ui_->RegisterMessageCallback(
      "importData", NewCallback(this, &ImportDataHandler::ImportData));
}

void ImportDataHandler::ImportData(const ListValue* args) {
  std::string string_value;

  int browser_index;
  if (!args->GetString(0, &string_value) ||
      !base::StringToInt(string_value, &browser_index)) {
    NOTREACHED();
    return;
  }

  uint16 selected_items = importer::NONE;
  if (args->GetString(1, &string_value) && string_value == "true") {
    selected_items |= importer::HISTORY;
  }
  if (args->GetString(2, &string_value) && string_value == "true") {
    selected_items |= importer::FAVORITES;
  }
  if (args->GetString(3, &string_value) && string_value == "true") {
    selected_items |= importer::PASSWORDS;
  }
  if (args->GetString(4, &string_value) && string_value == "true") {
    selected_items |= importer::SEARCH_ENGINES;
  }

  const ProfileInfo& source_profile =
      importer_list_->GetSourceProfileInfoAt(browser_index);
  uint16 supported_items = source_profile.services_supported;

  uint16 import_services = (selected_items & supported_items);
  if (import_services) {
    FundamentalValue state(true);
    dom_ui_->CallJavascriptFunction(
        L"ImportDataOverlay.setImportingState", state);

    // The ImporterHost object creates an ImporterList, which calls PathExists
    // one or more times.  Because we are currently in the UI thread, this will
    // trigger a DCHECK due to IO being done on the UI thread.  For now we will
    // supress the DCHECK.  See the following bug for more detail:
    // http://crbug.com/60825
    base::ThreadRestrictions::ScopedAllowIO allow_io;

    // TODO(csilv): Out-of-process import has only been qualified on MacOS X,
    // so we will only use it on that platform since it is required. Remove this
    // conditional logic once oop import is qualified for Linux/Windows.
    // http://crbug.com/22142
#if defined(OS_MACOSX)
    importer_host_ = new ExternalProcessImporterHost;
#else
    importer_host_ = new ImporterHost;
#endif
    importer_host_->SetObserver(this);
    Profile* profile = dom_ui_->GetProfile();
    importer_host_->StartImportSettings(source_profile, profile,
                                        import_services,
                                        new ProfileWriter(profile), false);
  } else {
    LOG(WARNING) << "There were no settings to import from '"
        << source_profile.description << "'.";
  }
}

void ImportDataHandler::ImportStarted() {
}

void ImportDataHandler::ImportItemStarted(importer::ImportItem item) {
  // TODO(csilv): show progress detail in the web view.
}

void ImportDataHandler::ImportItemEnded(importer::ImportItem item) {
  // TODO(csilv): show progress detail in the web view.
}

void ImportDataHandler::ImportEnded() {
  importer_host_->SetObserver(NULL);
  importer_host_ = NULL;

  dom_ui_->CallJavascriptFunction(L"ImportDataOverlay.dismiss");
}