#ifndef PREFILTERINGINDEXREADER_H
#define PREFILTERINGINDEXREADER_H

#include "BaseMatrix.h"
#include "IndexTable.h"
#include "DBReader.h"
#include <string>

struct PrefilteringIndexData {
    int maxSeqLength;
    int kmerSize;
    int compBiasCorr;
    int alphabetSize;
    int mask;
    int spacedKmer;
    int kmerThr;
    int seqType;
    int srcSeqType;
    int headers1;
    int headers2;
    int splits;
};


class PrefilteringIndexReader {
public:
    static const char*  CURRENT_VERSION;
    static unsigned int VERSION;
    static unsigned int ENTRIES;
    static unsigned int ENTRIESOFFSETS;
    static unsigned int ENTRIESGRIDSIZE;
    static unsigned int SEQINDEXDATA;
    static unsigned int SEQINDEXDATASIZE;
    static unsigned int SEQINDEXSEQOFFSET;
    static unsigned int ENTRIESNUM;
    static unsigned int SEQCOUNT;
    static unsigned int META;
    static unsigned int SCOREMATRIXNAME;
    static unsigned int SEEDSCOREMATRIXNAME;
    static unsigned int SCOREMATRIX2MER;
    static unsigned int SCOREMATRIX3MER;
    static unsigned int DBR1INDEX;
    static unsigned int DBR1DATA;
    static unsigned int DBR2INDEX;
    static unsigned int DBR2DATA;
    static unsigned int HDR1INDEX;
    static unsigned int HDR1DATA;
    static unsigned int HDR2INDEX;
    static unsigned int HDR2DATA;
    static unsigned int GENERATOR;
    static unsigned int SPACEDPATTERN;

    static bool checkIfIndexFile(DBReader<unsigned int> *reader);
    static std::string indexName(const std::string &outDB);

    static void createIndexFile(const std::string &outDb,
                                DBReader<unsigned int> *dbr1, DBReader<unsigned int> *dbr2,
                                DBReader<unsigned int> *hdbr1, DBReader<unsigned int> *hdbr2,
                                BaseMatrix *seedSubMat, int maxSeqLen, bool spacedKmer, const std::string &spacedKmerPattern,
                                bool compBiasCorrection, int alphabetSize, int kmerSize, int maskMode, int maskLowerCase, int kmerThr, int splits);

    static DBReader<unsigned int> *openNewHeaderReader(DBReader<unsigned int>*dbr, unsigned int dataIdx, unsigned int indexIdx, int threads, bool touchIndex, bool touchData);

    static DBReader<unsigned int> *openNewReader(DBReader<unsigned int> *dbr, unsigned int dataIdx, unsigned int indexIdx, bool includeData, int threads, bool touchIndex, bool touchData);

    static SequenceLookup *getSequenceLookup(unsigned int split, DBReader<unsigned int> *dbr, int preloadMode);

    static IndexTable *getIndexTable(unsigned int split, DBReader<unsigned int> *dbr, int preloadMode);

    static void printSummary(DBReader<unsigned int> *dbr);

    static PrefilteringIndexData getMetadata(DBReader<unsigned int> *dbr);

    static std::string getSubstitutionMatrixName(DBReader<unsigned int> *dbr);

    static std::string getSubstitutionMatrix(DBReader<unsigned int> *dbr);

    static std::string getSpacedPattern(DBReader<unsigned int> *dbr);

    static ScoreMatrix get2MerScoreMatrix(DBReader<unsigned int> *dbr, int preloadMode);

    static ScoreMatrix get3MerScoreMatrix(DBReader<unsigned int> *dbr, int preloadMode);

    static std::string searchForIndex(const std::string &pathToDB);

private:
    static void printMeta(int *meta);
};

#endif
