//
// Created by Иван_Архипов on 31.10.2017.
//

#ifndef LOTRO_DAT_PATCHER_DATFILE_H
#define LOTRO_DAT_PATCHER_DATFILE_H

#ifdef LOTRO_DAT_EXPORTS
#define LOTRO_DAT_API __declspec(dllexport)
#else
#define LOTRO_DAT_API __declspec(dllimport)
#endif

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

// Dat file names definitions

#define CLIENT_LOCAL_ENGLISH 0
#define CLIENT_GENERAL 1
#define CLIENT_SOUND 2
#define CLIENT_SURFACE 3
#define CLIENT_HIGHRES 4

extern "C++"
{
namespace LOTRO_DAT {
    class BinaryData;

    class DatException;

    class SubDirectory;

    class Subfile;

    class SubfileData;

    enum FILE_TYPE : int {
        TEXT,
        JPG,
        DDS,
        WAV,
        OGG,
        FONT,
        UNKNOWN
    };

    enum DAT_STATE {
        CLOSED = 1,
        SUCCESS_OPENED = 2,
        SUCCESS_SUPERBLOCK = 3,
        SUCCESS_DIRECTORIES = 4,
        SUCCESS_DICTIONARY = 5,
        READY = 6,
        UPDATED = 7
    };

    enum LOCALE : unsigned {
        ORIGINAL = 0,
        PATCHED = 1
    };

    class DatFile {
        friend class SubDirectory;

    public:
        DatFile();

        bool InitDatFile(const std::string &filename, int dat_id);

        DAT_STATE DatFileState() const;

        virtual ~DatFile();

        bool ExtractFile(long long file_id, const std::string &path = "");

        bool ExtractFile(long long file_id, Database *db);

        int ExtractAllFilesByType(FILE_TYPE type, std::string path = "");

        int ExtractAllFilesByType(FILE_TYPE type, Database *db);

        bool PatchFile(const char *filename, YAML::Node options);

        bool PatchFile(const SubfileData &data);

        bool PatchAllDatabase(Database *db);

        void WriteUnorderedDictionary(std::string path) const;

        long long files_number() const;

        BinaryData GetFileData(const Subfile *file, long long offset = 0);

        bool CommitChanges();

        bool CloseDatFile();

    private:
        // INIT SECTION
        void OpenDatFile(const char *dat_name);

        void ReadSuperBlock();

        void MakeDirectories();

        void MakeDictionary();

        // READ-WRITE SECTION

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

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

        // PATCH SECTION

        void ApplyFilePatch(Subfile *file, const BinaryData &data);

        std::vector<std::pair<long long, long long> > GetFragmentationJournal();

        void UpdateHeader();

        void UpdateSubdirectories();

        void UpdateFragmentationJournal(const std::vector<std::pair<long long, long long> > &journal);

        // LOCALE MANAGING SECTION
    private:
        void InitLocale(LOCALE locale, const char* dict_name);

        void SaveLocale(LOCALE locale, const char* filename);

        void CommitLocales();

    public:
        void SetLocale(LOCALE locale);

        bool CheckIfUpdatedByGame();

        void RepairPatches(Database *db);

        LOCALE current_locale();

    private:
        std::unordered_map<long long, Subfile*>* GetLocaleDictReference(LOCALE locale);

    private:
        LOCALE current_locale_;

        std::string filename_;

        std::unordered_map<long long, Subfile*> orig_dict_;
        std::unordered_map<long long, Subfile*> patch_dict_;
        std::unordered_map<long long, Subfile*> pending_patch_;

    private:
        FILE *file_handler_;

        SubDirectory *root_directory_;

        std::unordered_set<long long> patched_list;

        std::unordered_map<long long, Subfile *> dictionary_;

        long long constant1_;
        long long constant2_;
        long long file_size_;
        long long version1_;
        long long version2_;
        long long root_directory_offset_;
        long long fragmentation_journal_offset_;

        DAT_STATE dat_state_;

        int dat_id_;
    };
}
}

#endif //LOTRO_DAT_PATCHER_DATFILE_H