#ifndef SEARCHTOKEN_H
#define SEARCHTOKEN_H

#include <QString>
#include <QVector>
#include <QRegularExpression>
#include <QBitArray>
#include <QScopedPointer>

#include <core/global.h>

class QCommandLineParser;

namespace vnotex
{
    class SearchToken
    {
    public:
        enum class Type
        {
            PlainText,
            RegularExpression
        };

        enum class Operator
        {
            And,
            Or
        };

        void clear();

        void append(const QString &p_text);

        void append(const QRegularExpression &p_regExp);

        // Whether @p_text is matched.
        bool matched(const QString &p_text, QList<Segment> *p_segments = nullptr) const;

        int constraintSize() const;

        bool isEmpty() const;

        bool shouldStartBatchMode() const;

        // Batch Mode: use a list of text string to match the same token.
        void startBatchMode();

        // Match one string in batch mode.
        // Return true if @p_text is matched.
        bool matchedInBatchMode(const QString &p_text, QList<Segment> *p_segments = nullptr);

        bool readyToEndBatchMode() const;

        void endBatchMode();

        QPair<QStringList, FindOptions> toPatterns() const;

        // Compile tokens from keyword.
        // Support some magic switchs in the keyword which will suppress the given options.
        static bool compile(const QString &p_keyword, FindOptions p_options, SearchToken &p_token);

        static QString getHelpText();

        static void addSearchOptionsToCommand(QCommandLineParser *p_parser);

    private:
        static QCommandLineParser *getCommandLineParser();

        Type m_type = Type::PlainText;

        Operator m_operator = Operator::And;

        Qt::CaseSensitivity m_caseSensitivity = Qt::CaseInsensitive;

        QStringList m_keywords;

        QVector<QRegularExpression> m_regularExpressions;

        // [i] is true only if m_keywords[i] or m_regularExpressions[i] is matched.
        QBitArray m_matchedConstraintsInBatchMode;

        int m_matchedConstraintsCountInBatchMode = 0;
    };
}

#endif // SEARCHTOKEN_H