// Copyright 2026 Google LLC
//
// 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
//
//    https://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.
//

#ifndef THIRD_PARTY_CREDENTIO_CLAIM_MANIFEST_STORE_BUILDER_H_
#define THIRD_PARTY_CREDENTIO_CLAIM_MANIFEST_STORE_BUILDER_H_

#include <string>
#include <vector>

#include "absl/container/flat_hash_map.h"
#include "absl/log/die_if_null.h"
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "absl/strings/string_view.h"
#include "crypto/hash.h"
#include "jumbf/box.h"
#include "jumbf/box_builder.h"
#include "proto/hashed_uri.pb.h"

namespace credentio {

// Struct holding the HashedUris for an ingredient's active manifest.
struct IngredientManifestUris {
  HashedUri active_manifest;
  HashedUri claim_signature;
};

// Builder for a manifest store.
class ManifestStoreBuilder {
 public:
  explicit ManifestStoreBuilder(const HasherFactory* hasher_factory)
      : hasher_factory_(*ABSL_DIE_IF_NULL(hasher_factory)) {};

  // Adds an ingredient manifest store via its serialized bytes.
  // Returns the HashedUris computed on the ingredient's active manifest.
  absl::StatusOr<IngredientManifestUris> AddIngredientManifestStore(
      absl::string_view manifest_store_bytes);

  // Finish writing the manifest store. This consumes the builder, use
  // `std::move(builder).Finalize()`;
  absl::StatusOr<jumbf::BuiltSuperBox> Finalize(
      jumbf::BuiltSuperBox&& active_manifest) &&;

 private:
  struct ManifestInfo {
    bool copied_to_manifest_store = false;  // Already copied by Finalize?
  };

  absl::flat_hash_map<std::string, ManifestInfo> manifest_info_;
  // Factory for creating hashers. Used to compute HashedUris.
  const HasherFactory& hasher_factory_;
  // Ingredient manifests added to the manifest store.
  std::vector<jumbf::SuperBox> ingredient_manifest_stores_;
};
}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_CLAIM_MANIFEST_STORE_BUILDER_H_