// Copyright 2014 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 "chromecast/browser/cast_http_user_agent_settings.h"

#include "base/i18n/rtl.h"
#include "base/logging.h"
#include "build/build_config.h"
#include "chromecast/app/grit/chromecast_settings.h"
#include "chromecast/common/cast_content_client.h"
#include "content/public/browser/browser_thread.h"
#include "net/http/http_util.h"
#include "ui/base/l10n/l10n_util.h"

#if defined(OS_ANDROID)
#include "base/android/locale_utils.h"
#endif  // defined(OS_ANDROID)

namespace {

std::string GetLocale() {
#if defined(OS_ANDROID)
  // TODO(byungchul): Use transient locale set when new app starts.
  return base::android::GetDefaultLocaleString();
#else
  return base::i18n::GetConfiguredLocale();
#endif
}

std::string LocaleToAcceptLanguage(const std::string locale) {
  return net::HttpUtil::GenerateAcceptLanguageHeader(
#if defined(OS_ANDROID)
      locale
#else
      // Ignoring |locale| here is a bit weird, but locale is still used to
      // avoid a l10n_util::GetStringUTF8() call when GetAcceptLanguage() is
      // called.
      l10n_util::GetStringUTF8(IDS_CHROMECAST_SETTINGS_ACCEPT_LANGUAGES)
#endif
      );
}

}  // namespace

namespace chromecast {
namespace shell {

CastHttpUserAgentSettings::CastHttpUserAgentSettings() {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
}

CastHttpUserAgentSettings::~CastHttpUserAgentSettings() {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
}

std::string CastHttpUserAgentSettings::GetAcceptLanguage() const {
  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  std::string new_locale(GetLocale());
  if (new_locale != last_locale_ || accept_language_.empty()) {
    last_locale_ = new_locale;
    accept_language_ = LocaleToAcceptLanguage(new_locale);
    LOG(INFO) << "Locale changed: accept_language=" << accept_language_;
  }
  return accept_language_;
}

std::string CastHttpUserAgentSettings::GetUserAgent() const {
  return chromecast::shell::GetUserAgent();
}

std::string CastHttpUserAgentSettings::AcceptLanguage() {
  return LocaleToAcceptLanguage(GetLocale());
}

}  // namespace shell
}  // namespace chromecast