/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2023 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#pragma once

#include <QMutex>
#include <QVarLengthArray>
#include <QVector>

#include <U2Core/AppResources.h>
#include <U2Core/Msa.h>
#include <U2Core/Task.h>

namespace U2 {

class DNAAlphabet;
class MsaDistanceAlgorithm;
class MsaDistanceMatrix;

enum DistanceAlgorithmFlag {
    DistanceAlgorithmFlag_Nucleic = 1 << 0,
    DistanceAlgorithmFlag_Amino = 1 << 1,
    DistanceAlgorithmFlag_Raw = 1 << 2,
    DistanceAlgorithmFlag_ExcludeGaps = 1 << 3
};

typedef QFlags<DistanceAlgorithmFlag> DistanceAlgorithmFlags;
#define DistanceAlgorithmFlags_AllAlphabets (DistanceAlgorithmFlags(DistanceAlgorithmFlag_Nucleic) | DistanceAlgorithmFlag_Amino | DistanceAlgorithmFlag_Raw)
#define DistanceAlgorithmFlags_NuclAmino (DistanceAlgorithmFlags(DistanceAlgorithmFlag_Nucleic) | DistanceAlgorithmFlag_Amino)

class U2ALGORITHM_EXPORT MsaDistanceAlgorithmFactory : public QObject {
    Q_OBJECT
public:
    MsaDistanceAlgorithmFactory(const QString& algoId, DistanceAlgorithmFlags flags, QObject* p = nullptr);

    virtual MsaDistanceAlgorithm* createAlgorithm(const Msa& ma, QObject* parent = nullptr) = 0;

    QString getId() const {
        return algorithmId;
    }

    DistanceAlgorithmFlags getFlags() const {
        return flags;
    }

    void setFlag(DistanceAlgorithmFlag flag);
    void resetFlag(DistanceAlgorithmFlag flag);

    virtual QString getDescription() const = 0;

    virtual QString getName() const = 0;

    // utility method
    static DistanceAlgorithmFlags getAlphabetFlags(const DNAAlphabet* al);

protected:
    QString algorithmId;
    DistanceAlgorithmFlags flags;
};

typedef QVarLengthArray<QVarLengthArray<int>> varLengthMatrix;

class U2ALGORITHM_EXPORT MsaDistanceMatrix {
    friend class MsaDistanceAlgorithm;

private:
    MsaDistanceMatrix();
    MsaDistanceMatrix(const Msa& ma, bool _excludeGaps, bool _usePercents);

public:
    bool isEmpty() {
        return table.isEmpty();
    }
    int getSimilarity(int row1, int row2) const;
    int getSimilarity(int row1, int row2, bool _usePercents) const;
    void setPercentSimilarity(bool _usePercents) {
        usePercents = _usePercents;
    }
    bool isPercentSimilarity() {
        return usePercents;
    }

protected:
    varLengthMatrix table;
    bool usePercents;
    bool excludeGaps;
    QVector<int> seqsUngappedLenghts;
    int alignmentLength;
};

class U2ALGORITHM_EXPORT MsaDistanceAlgorithm : public Task {
    Q_OBJECT

public:
    MsaDistanceAlgorithm(MsaDistanceAlgorithmFactory* factory, const Msa& ma);

    int getSimilarity(int row1, int row2, bool usePercents);

    const MsaDistanceMatrix& getMatrix() const;

    virtual QString getDescription() const {
        return factory->getDescription();
    }

    virtual QString getName() const {
        return factory->getName();
    }

    QString getId() const {
        return factory->getId();
    }

    bool isSimilarityMeasure() const {
        return isSimilarity;
    }

    void setExcludeGaps(bool _excludeGaps);

    MsaDistanceAlgorithmFactory* getFactory() const {
        return factory;
    }

    bool getExcludeGapsFlag() const {
        return excludeGaps;
    }

    void setDistanceValue(int row1, int row2, int distance);

private:
    MsaDistanceMatrix distanceMatrix;
    MsaDistanceAlgorithmFactory* factory;
    MemoryLocker memoryLocker;

protected:
    virtual void fillTable();
    virtual int calculateSimilarity(int, int) {
        return 0;
    }
    Msa ma;
    mutable QMutex lock;
    bool excludeGaps;
    bool isSimilarity;
};

}  // namespace U2
