#ifndef YAZE_APP_NET_ROM_SERVICE_IMPL_H_
#define YAZE_APP_NET_ROM_SERVICE_IMPL_H_

#include <memory>
#include <string>

#include "absl/status/status.h"
#include "absl/status/statusor.h"

#ifdef YAZE_WITH_GRPC
#include <grpcpp/grpcpp.h>
#include "protos/rom_service.grpc.pb.h"
// Note: Proto files will be generated to build directory
#endif

#include "app/rom.h"
#include "app/net/rom_version_manager.h"

namespace yaze {
namespace app {
namespace net {

#ifdef YAZE_WITH_GRPC

/**
 * @brief gRPC service implementation for remote ROM manipulation
 * 
 * Enables remote clients (like z3ed CLI) to:
 * - Read/write ROM data
 * - Submit proposals for collaborative editing
 * - Manage ROM versions and snapshots
 * - Query ROM structures (overworld, dungeons, sprites)
 * 
 * Thread-safe and designed for concurrent access.
 */
class RomServiceImpl final : public proto::RomService::Service {
 public:
  /**
   * @brief Configuration for the ROM service
   */
  struct Config {
    bool require_approval_for_writes = true;  // Submit writes as proposals
    bool enable_version_management = true;    // Auto-snapshot before changes
    int max_read_size_bytes = 1024 * 1024;    // 1MB max per read
    bool allow_raw_rom_access = true;         // Allow direct byte access
  };
  
  /**
   * @brief Construct ROM service
   * @param rom Pointer to ROM instance (not owned)
   * @param version_mgr Pointer to version manager (not owned, optional)
   * @param approval_mgr Pointer to approval manager (not owned, optional)
   */
  RomServiceImpl(Rom* rom,
                 RomVersionManager* version_mgr = nullptr,
                 ProposalApprovalManager* approval_mgr = nullptr);
  
  ~RomServiceImpl() override = default;
  
  // Initialize with configuration
  void SetConfig(const Config& config) { config_ = config; }
  
  // =========================================================================
  // Basic ROM Operations
  // =========================================================================
  
  grpc::Status ReadBytes(
      grpc::ServerContext* context,
      const proto::ReadBytesRequest* request,
      proto::ReadBytesResponse* response) override;
  
  grpc::Status WriteBytes(
      grpc::ServerContext* context,
      const proto::WriteBytesRequest* request,
      proto::WriteBytesResponse* response) override;
  
  grpc::Status GetRomInfo(
      grpc::ServerContext* context,
      const proto::GetRomInfoRequest* request,
      proto::GetRomInfoResponse* response) override;
  
  // =========================================================================
  // Overworld Operations
  // =========================================================================
  
  grpc::Status ReadOverworldMap(
      grpc::ServerContext* context,
      const proto::ReadOverworldMapRequest* request,
      proto::ReadOverworldMapResponse* response) override;
  
  grpc::Status WriteOverworldTile(
      grpc::ServerContext* context,
      const proto::WriteOverworldTileRequest* request,
      proto::WriteOverworldTileResponse* response) override;
  
  // =========================================================================
  // Dungeon Operations
  // =========================================================================
  
  grpc::Status ReadDungeonRoom(
      grpc::ServerContext* context,
      const proto::ReadDungeonRoomRequest* request,
      proto::ReadDungeonRoomResponse* response) override;
  
  grpc::Status WriteDungeonTile(
      grpc::ServerContext* context,
      const proto::WriteDungeonTileRequest* request,
      proto::WriteDungeonTileResponse* response) override;
  
  // =========================================================================
  // Sprite Operations
  // =========================================================================
  
  grpc::Status ReadSprite(
      grpc::ServerContext* context,
      const proto::ReadSpriteRequest* request,
      proto::ReadSpriteResponse* response) override;
  
  // =========================================================================
  // Proposal System
  // =========================================================================
  
  grpc::Status SubmitRomProposal(
      grpc::ServerContext* context,
      const proto::SubmitRomProposalRequest* request,
      proto::SubmitRomProposalResponse* response) override;
  
  grpc::Status GetProposalStatus(
      grpc::ServerContext* context,
      const proto::GetProposalStatusRequest* request,
      proto::GetProposalStatusResponse* response) override;
  
  // =========================================================================
  // Version Management
  // =========================================================================
  
  grpc::Status CreateSnapshot(
      grpc::ServerContext* context,
      const proto::CreateSnapshotRequest* request,
      proto::CreateSnapshotResponse* response) override;
  
  grpc::Status RestoreSnapshot(
      grpc::ServerContext* context,
      const proto::RestoreSnapshotRequest* request,
      proto::RestoreSnapshotResponse* response) override;
  
  grpc::Status ListSnapshots(
      grpc::ServerContext* context,
      const proto::ListSnapshotsRequest* request,
      proto::ListSnapshotsResponse* response) override;
  
 private:
  Config config_;
  Rom* rom_;  // Not owned
  RomVersionManager* version_mgr_;  // Not owned, may be null
  ProposalApprovalManager* approval_mgr_;  // Not owned, may be null
  
  // Helper to check if ROM is loaded
  grpc::Status ValidateRomLoaded();
  
  // Helper to create snapshot before write operations
  absl::Status MaybeCreateSnapshot(const std::string& description);
};

#endif  // YAZE_WITH_GRPC

}  // namespace net
}  // namespace app
}  // namespace yaze

#endif  // YAZE_APP_NET_ROM_SERVICE_IMPL_H_