// Copyright (c) 2015 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/ui/webui/settings/downloads_handler.h"

#include "base/values.h"
#include "chrome/browser/download/download_prefs.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/chrome_select_file_policy.h"
#include "chrome/common/pref_names.h"
#include "chrome/grit/chromium_strings.h"
#include "chrome/grit/settings_strings.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "ui/base/l10n/l10n_util.h"

using base::UserMetricsAction;

namespace settings {

DownloadsHandler::DownloadsHandler() {
}

DownloadsHandler::~DownloadsHandler() {
  // There may be pending file dialogs, we need to tell them that we've gone
  // away so they don't try and call back to us.
  if (select_folder_dialog_.get())
    select_folder_dialog_->ListenerDestroyed();
}

void DownloadsHandler::RegisterMessages() {
  web_ui()->RegisterMessageCallback(
      "selectDownloadLocation",
      base::Bind(&DownloadsHandler::HandleSelectDownloadLocation,
                 base::Unretained(this)));
}

void DownloadsHandler::HandleSelectDownloadLocation(
    const base::ListValue* args) {
  PrefService* pref_service = Profile::FromWebUI(web_ui())->GetPrefs();
  select_folder_dialog_ = ui::SelectFileDialog::Create(
      this, new ChromeSelectFilePolicy(web_ui()->GetWebContents()));
  ui::SelectFileDialog::FileTypeInfo info;
  info.allowed_paths = ui::SelectFileDialog::FileTypeInfo::NATIVE_OR_DRIVE_PATH;
  select_folder_dialog_->SelectFile(
      ui::SelectFileDialog::SELECT_FOLDER,
      l10n_util::GetStringUTF16(IDS_SETTINGS_DOWNLOAD_LOCATION),
      pref_service->GetFilePath(prefs::kDownloadDefaultDirectory), &info, 0,
      base::FilePath::StringType(),
      web_ui()->GetWebContents()->GetTopLevelNativeWindow(), NULL);
}

void DownloadsHandler::FileSelected(const base::FilePath& path,
                                    int index,
                                    void* params) {
  content::RecordAction(UserMetricsAction("Options_SetDownloadDirectory"));
  PrefService* pref_service = Profile::FromWebUI(web_ui())->GetPrefs();
  pref_service->SetFilePath(prefs::kDownloadDefaultDirectory, path);
  pref_service->SetFilePath(prefs::kSaveFileDefaultDirectory, path);
}

}  // namespace settings