// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.

#pragma once

#include "string_search_helper.h"
#include <vespa/vespalib/fuzzy/fuzzy_matching_algorithm.h>

namespace search { class QueryTermSimple; }

namespace search::attribute {

/*
 * Class used to determine if an attribute vector string value is a match for
 * the query string value.
 */
class StringMatcher
{
private:
    std::unique_ptr<QueryTermUCS4> _query_term;
    attribute::StringSearchHelper  _helper;
public:
    StringMatcher(std::unique_ptr<QueryTermSimple> qTerm, bool cased, vespalib::FuzzyMatchingAlgorithm fuzzy_matching_algorithm);
    StringMatcher(StringMatcher&&) noexcept;
    ~StringMatcher();
protected:
    bool isValid() const;
    bool match(const char *src) const { return _helper.isMatch(src); }
    bool isPrefix() const { return _helper.isPrefix(); }
    bool isRegex() const { return _helper.isRegex(); }
    bool isCased() const { return _helper.isCased(); }
    bool isFuzzy() const { return _helper.isFuzzy(); }
    const vespalib::Regex& getRegex() const { return _helper.getRegex(); }
    const vespalib::FuzzyMatcher& getFuzzyMatcher() const { return _helper.getFuzzyMatcher(); }
    const QueryTermUCS4* get_query_term_ptr() const noexcept { return _query_term.get(); }

    template <typename DictionaryConstIteratorType>
    bool is_fuzzy_match(const char* word, DictionaryConstIteratorType& itr, const DfaStringComparator::DataStoreType& data_store) const {
        return _helper.is_fuzzy_match(word, itr, data_store);
    }
};

}