//
// Created by kikab on 04.06.2018.
//

#ifndef LOTRO_DAT_LIBRARY_DATFILEIO_H
#define LOTRO_DAT_LIBRARY_DATFILEIO_H

#include <fstream>
#include <map>
#include <unordered_map>
#include <set>
#include <vector>
#include <yaml-cpp/node/node.h>
#include <unordered_set>


namespace LOTRO_DAT {
    class BinaryData;

    class DatFile;

    class DatOperationResult;

    class SubDirectory;

    class SubFile;

    class DatFileIO {
    public:
        DatFileIO() = delete;

        DatFileIO(const DatFileIO &other) = delete;

        explicit DatFileIO(DatFile &dat_ref);

        DatOperationResult Init(const std::string &filename);

        DatOperationResult
        ReadData(BinaryData &data, long long size, long long offset = 0, long long data_offset = 0) const;

        DatOperationResult
        WriteData(const BinaryData &data, long long size, long long offset = 0, long long data_offset = 0);

        std::shared_ptr<SubDirectory> GetRootDirectory();

        long long GetActualDatSize();

        DatOperationResult DeInit();

    private:

        //------------------------------------------------//
        // PRIVATE INIT SECTION
        //------------------------------------------------//

        DatOperationResult OpenDatFile();

        DatOperationResult ReadSuperBlock();

        DatOperationResult MakeDirectories();


        //------------------------------------------------//
        // PRIVATE DEINIT SECTION
        //------------------------------------------------//

        DatOperationResult ModifyFragmentationJournal();

        DatOperationResult UpdateHeader();

    private:
        DatFile &dat_file_ref;
        FILE *file_handler_;
        std::string filename_;

        std::shared_ptr<SubDirectory> root_directory_;

    public:
        long long constant1;
        long long constant2;
        long long file_size;
        long long version1;
        long long version2;
        long long fragmentation_journal_size;
        long long fragmentation_journal_end;
        long long root_directory_offset;
        long long fragmentation_journal_offset;
        long long free_dat_size;

    private:
        long long actual_dat_size_;
    };
};
#endif //LOTRO_DAT_LIBRARY_DATFILEIO_H