// Copyright 2026 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_HISTORY_CORE_BROWSER_JOURNEYS_JOURNEYS_SYNC_BRIDGE_H_
#define COMPONENTS_HISTORY_CORE_BROWSER_JOURNEYS_JOURNEYS_SYNC_BRIDGE_H_

#include <memory>
#include <optional>
#include <string>

#include "base/memory/raw_ptr.h"
#include "base/sequence_checker.h"
#include "components/sync/model/data_type_local_change_processor.h"
#include "components/sync/model/data_type_sync_bridge.h"
#include "components/sync/protocol/entity_specifics.pb.h"

namespace history::journeys {

class JourneysSyncMetadataDatabase;

// DataTypeSyncBridge implementation for JOURNEY sync data.
class JourneysSyncBridge : public syncer::DataTypeSyncBridge {
 public:
  JourneysSyncBridge(
      JourneysSyncMetadataDatabase* sync_metadata_database,
      std::unique_ptr<syncer::DataTypeLocalChangeProcessor> change_processor);

  JourneysSyncBridge(const JourneysSyncBridge&) = delete;
  JourneysSyncBridge& operator=(const JourneysSyncBridge&) = delete;

  ~JourneysSyncBridge() override;

  // syncer::DataTypeSyncBridge implementation.
  std::unique_ptr<syncer::MetadataChangeList> CreateMetadataChangeList()
      override;
  std::optional<syncer::ModelError> MergeFullSyncData(
      std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
      syncer::EntityChangeList entity_changes) override;
  std::optional<syncer::ModelError> ApplyIncrementalSyncChanges(
      std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
      syncer::EntityChangeList entity_changes) override;
  std::unique_ptr<syncer::DataBatch> GetDataForCommit(
      StorageKeyList storage_keys) override;
  std::unique_ptr<syncer::DataBatch> GetAllDataForDebugging() override;
  std::string GetClientTag(
      const syncer::EntityData& entity_data) const override;
  std::string GetStorageKey(
      const syncer::EntityData& entity_data) const override;
  bool IsEntityDataValid(const syncer::EntityData& entity_data) const override;
  sync_pb::EntitySpecifics TrimAllSupportedFieldsFromRemoteSpecifics(
      const sync_pb::EntitySpecifics& entity_specifics) const override;
  void ApplyDisableSyncChanges(std::unique_ptr<syncer::MetadataChangeList>
                                   delete_metadata_change_list) override;

  // Called when the database encounters an error.
  void OnDatabaseError();

 private:
  void LoadMetadata();

  raw_ptr<JourneysSyncMetadataDatabase> sync_metadata_database_;
  SEQUENCE_CHECKER(sequence_checker_);
};

}  // namespace history::journeys

#endif  // COMPONENTS_HISTORY_CORE_BROWSER_JOURNEYS_JOURNEYS_SYNC_BRIDGE_H_