/*
 * Copyright (C) 2025 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/disk/metadata_image.h"

#include <stddef.h>

#include <string>

#include "cuttlefish/common/libs/utils/files.h"
#include "cuttlefish/host/libs/config/cuttlefish_config.h"
#include "cuttlefish/host/libs/config/data_image.h"
#include "cuttlefish/result/result.h"

namespace cuttlefish {

static constexpr size_t kMetadataImageMb = 64;
static constexpr size_t kMetadataImageBytes = kMetadataImageMb << 20;

MetadataImage::MetadataImage(const CuttlefishConfig::InstanceSpecific& ins) {
  path_ = ins.PerInstancePath(kName);
  ready_ = FileExists(path_) && FileSize(path_) == kMetadataImageBytes;
}

MetadataImage::MetadataImage(std::string path) : path_(std::move(path)) {}

std::string MetadataImage::Name() const { return std::string(kName); }

Result<std::string> MetadataImage::Path() const {
  CF_EXPECT(!!ready_);
  return path_;
}

Result<std::string> MetadataImage::Generate() {
  if (!ready_) {
    CF_EXPECTF(CreateBlankEmptyImage(path_, kMetadataImageMb),
               "Failed to create '{}' with size '{}' MB", path_,
               kMetadataImageMb);
    ready_ = true;
  }
  return path_;
}

}  // namespace cuttlefish
