#ifndef MISSION_TMTC_TMSTOREBACKEND_H_
#define MISSION_TMTC_TMSTOREBACKEND_H_

#include <fsfw/objectmanager/SystemObject.h>
#include <fsfw/tmstorage/TmStoreFrontendIF.h>
#include <fsfw/tmtcpacket/pus/tm/PusTmReader.h>
#include <fsfw/tmtcservices/AcceptsTelemetryIF.h>
#include <mission/memory/SdCardMountedIF.h>

#include <filesystem>

#include "TmFunnelBase.h"

struct PacketFilter {
  std::optional<std::vector<uint16_t>> apid;
  std::optional<std::vector<uint8_t>> services;
  std::optional<std::vector<std::pair<uint8_t, uint8_t>>> serviceSubservices;
};

enum class RolloverInterval { MINUTELY, HOURLY, DAILY };

class TmStore : public SystemObject {
 public:
  TmStore(object_id_t objectId, const char* baseDir, std::string baseName,
          RolloverInterval intervalUnit, uint32_t intervalCount, timeval& currentTv,
          SdCardMountedIF& sdcMan);

  void addApid(uint16_t apid);
  void addService(uint8_t service);
  void addServiceSubservice(uint8_t service, uint8_t subservice);

  void deleteUpTo(uint32_t unixSeconds);
  void dumpFromUpTo(uint32_t fromUnixSeconds, uint32_t upToUnixSeconds, TmFunnelBase& tmFunnel);

  void updateBaseDir();
  ReturnValue_t passPacket(PusTmReader& reader);

 private:
  static constexpr size_t MAX_FILESIZE = 8192;

  /**
   * To get the queue where commands shall be sent.
   * @return  Id of command queue.
   */
  MessageQueueId_t getCommandQueue();
  PacketFilter filter;
  bool baseDirUninitialized = true;
  const char* baseDir;
  std::string baseName;
  std::filesystem::path basePath;
  uint32_t rolloverDiffSeconds = 0;
  std::array<uint8_t, MAX_FILESIZE> fileBuf{};
  timeval& currentTv;
  std::optional<timeval> mostRecentTv;
  std::optional<std::filesystem::path> mostRecentFile;
  SdCardMountedIF& sdcMan;

  void calcDiffSeconds(RolloverInterval intervalUnit, uint32_t intervalCount);
  void assignAndOrCreateMostRecentFile();
  ReturnValue_t storePacket(PusTmReader& reader);
};

#endif /* MISSION_TMTC_TMSTOREBACKEND_H_ */