// Copyright 2013 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/chromeos/file_manager/path_util.h"

#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/sys_info.h"
#include "chrome/browser/chromeos/profiles/profile_helper.h"
#include "chrome/browser/download/download_prefs.h"
#include "chrome/browser/profiles/profile.h"
#include "components/drive/file_system_core_util.h"
#include "components/user_manager/user.h"
#include "components/user_manager/user_manager.h"
#include "net/base/escape.h"

namespace file_manager {
namespace util {

namespace {

const char kDownloadsFolderName[] = "Downloads";

}  // namespace

base::FilePath GetDownloadsFolderForProfile(Profile* profile) {
  // On non-ChromeOS system (test+development), the primary profile uses
  // $HOME/Downloads for ease for accessing local files for debugging.
  if (!base::SysInfo::IsRunningOnChromeOS() &&
      user_manager::UserManager::IsInitialized()) {
    const user_manager::User* const user =
        chromeos::ProfileHelper::Get()->GetUserByProfile(
            profile->GetOriginalProfile());
    const user_manager::User* const primary_user =
        user_manager::UserManager::Get()->GetPrimaryUser();
    if (user == primary_user)
      return DownloadPrefs::GetDefaultDownloadDirectory();
  }
  return profile->GetPath().AppendASCII(kDownloadsFolderName);
}

bool MigratePathFromOldFormat(Profile* profile,
                              const base::FilePath& old_path,
                              base::FilePath* new_path) {
  const base::FilePath old_base = DownloadPrefs::GetDefaultDownloadDirectory();
  const base::FilePath new_base = GetDownloadsFolderForProfile(profile);

  base::FilePath relative;
  if (old_path == old_base ||
      old_base.AppendRelativePath(old_path, &relative)) {
    *new_path = new_base.Append(relative);
    return old_path != *new_path;
  }

  return false;
}

std::string GetDownloadsMountPointName(Profile* profile) {
  // To distinguish profiles in multi-profile session, we append user name hash
  // to "Downloads". Note that some profiles (like login or test profiles)
  // are not associated with an user account. In that case, no suffix is added
  // because such a profile never belongs to a multi-profile session.
  const user_manager::User* const user =
      user_manager::UserManager::IsInitialized()
          ? chromeos::ProfileHelper::Get()->GetUserByProfile(
                profile->GetOriginalProfile())
          : NULL;
  const std::string id = user ? "-" + user->username_hash() : "";
  return net::EscapeQueryParamValue(kDownloadsFolderName + id, false);
}

}  // namespace util
}  // namespace file_manager