/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "cuttlefish/host/commands/assemble_cvd/flags/system_image_dir.h"

#include <string>
#include <utility>
#include <vector>

#include "absl/strings/str_split.h"
#include <gflags/gflags.h>

#include "cuttlefish/host/commands/assemble_cvd/flags/flag_base.h"
#include "cuttlefish/host/commands/assemble_cvd/flags_defaults.h"
#include "cuttlefish/result/result.h"

DEFINE_string(system_image_dir, CF_DEFAULTS_SYSTEM_IMAGE_DIR,
              "Directory where `.img` files are loaded from");

namespace cuttlefish {
namespace {

constexpr char kFlagName[] = "system_image_dir";

}

Result<SystemImageDirFlag> SystemImageDirFlag::FromGlobalGflags() {
  gflags::CommandLineFlagInfo flag_info =
      gflags::GetCommandLineFlagInfoOrDie(kFlagName);
  std::string system_image_dir_flag = flag_info.is_default
                                          ? DefaultGuestImagePath("")
                                          : flag_info.current_value;
  CF_EXPECTF(!system_image_dir_flag.empty(), "--{} must be specified.",
             kFlagName);

  std::vector<std::string> paths =
      absl::StrSplit(system_image_dir_flag, ',');
  return SystemImageDirFlag(std::move(paths), flag_info.is_default);
}

SystemImageDirFlag::SystemImageDirFlag(std::vector<std::string> flag_values,
                                       bool is_default)
    : FlagBase<std::string>(std::move(flag_values), is_default) {}

}  // namespace cuttlefish
