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// regarding copyright ownership.  The ASF licenses this file

// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

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// software distributed under the License is distributed on an

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// specific language governing permissions and limitations

// under the License.

#include "olap/match_predicate.h"

#include <roaring/roaring.hh>

#include "exec/olap_utils.h"

#include "olap/field.h"

#include "olap/inverted_index_parser.h"

#include "olap/olap_common.h"

#include "olap/rowset/segment_v2/inverted_index_cache.h"

#include "olap/rowset/segment_v2/inverted_index_reader.h"

#include "olap/schema.h"

#include "olap/tablet_schema.h"

#include "olap/types.h"

#include "olap/utils.h"

#include "runtime/define_primitive_type.h"

#include "runtime/types.h"

#include "vec/common/assert_cast.h"

#include "vec/common/string_ref.h"

#include "vec/data_types/data_type.h"

#include "vec/data_types/data_type_array.h"

namespace doris {

#include "common/compile_check_begin.h"

MatchPredicate::MatchPredicate(uint32_t column_id, const std::string& value, MatchType match_type)

        : ColumnPredicate(column_id), _value(value), _match_type(match_type) {}

PredicateType MatchPredicate::type() const {

    return PredicateType::MATCH;

}

Status MatchPredicate::evaluate(const vectorized::IndexFieldNameAndTypePair& name_with_type,

                                InvertedIndexIterator* iterator, uint32_t num_rows,

                                roaring::Roaring* bitmap) const {

    if (iterator == nullptr) {

        return Status::OK();

    }

    if (_check_evaluate(iterator)) {

        return Status::Error<ErrorCode::INVERTED_INDEX_INVALID_PARAMETERS>(

                "phrase queries require setting support_phrase = true");

    }

    auto type = name_with_type.second;

    std::shared_ptr<roaring::Roaring> roaring = std::make_shared<roaring::Roaring>();

    auto inverted_index_query_type = _to_inverted_index_query_type(_match_type);

    TypeDescriptor column_desc = type->get_type_as_type_descriptor();

    if (is_string_type(column_desc.type) ||

        (column_desc.type == TYPE_ARRAY && is_string_type(column_desc.children[0].type))) {

        StringRef match_value;

        auto length = _value.length();

        char* buffer = const_cast<char*>(_value.c_str());

        match_value.replace(buffer, int32_t(length)); //is it safe?

        RETURN_IF_ERROR(iterator->read_from_inverted_index(

                name_with_type, &match_value, inverted_index_query_type, num_rows, roaring));

    } else if (column_desc.type == TYPE_ARRAY &&

               is_numeric_type(

                       TabletColumn::get_field_type_by_type(column_desc.children[0].type))) {

        std::vector<char> buf(column_desc.children[0].len);

        const TypeInfo* type_info = get_scalar_type_info(

                TabletColumn::get_field_type_by_type(column_desc.children[0].type));

        RETURN_IF_ERROR(type_info->from_string(buf.data(), _value));

        RETURN_IF_ERROR(iterator->read_from_inverted_index(

                name_with_type, buf.data(), inverted_index_query_type, num_rows, roaring, true));

    }

    // mask out null_bitmap, since NULL cmp VALUE will produce NULL

    //  and be treated as false in WHERE

    // keep it after query, since query will try to read null_bitmap and put it to cache

    if (iterator->has_null()) {

        InvertedIndexQueryCacheHandle null_bitmap_cache_handle;

        RETURN_IF_ERROR(iterator->read_null_bitmap(&null_bitmap_cache_handle));

        std::shared_ptr<roaring::Roaring> null_bitmap = null_bitmap_cache_handle.get_bitmap();

        if (null_bitmap) {

            *bitmap -= *null_bitmap;

        }

    }

    *bitmap &= *roaring;

    return Status::OK();

}

InvertedIndexQueryType MatchPredicate::_to_inverted_index_query_type(MatchType match_type) const {

    auto ret = InvertedIndexQueryType::UNKNOWN_QUERY;

    switch (match_type) {

    case MatchType::MATCH_ANY:

        ret = InvertedIndexQueryType::MATCH_ANY_QUERY;

        break;

    case MatchType::MATCH_ALL:

        ret = InvertedIndexQueryType::MATCH_ALL_QUERY;

        break;

    case MatchType::MATCH_PHRASE:

        ret = InvertedIndexQueryType::MATCH_PHRASE_QUERY;

        break;

    case MatchType::MATCH_PHRASE_PREFIX:

        ret = InvertedIndexQueryType::MATCH_PHRASE_PREFIX_QUERY;

        break;

    case MatchType::MATCH_REGEXP:

        ret = InvertedIndexQueryType::MATCH_REGEXP_QUERY;

        break;

    case MatchType::MATCH_PHRASE_EDGE:

        ret = InvertedIndexQueryType::MATCH_PHRASE_EDGE_QUERY;

        break;

    default:

        DCHECK(false);

    }

    return ret;

}

bool MatchPredicate::_check_evaluate(InvertedIndexIterator* iterator) const {

    if (_match_type == MatchType::MATCH_PHRASE || _match_type == MatchType::MATCH_PHRASE_PREFIX ||

        _match_type == MatchType::MATCH_PHRASE_EDGE) {

        auto reader = iterator->get_reader(InvertedIndexReaderType::FULLTEXT);

        if (reader &&

            get_parser_phrase_support_string_from_properties(reader->get_index_properties()) ==

                    INVERTED_INDEX_PARSER_PHRASE_SUPPORT_NO) {

            return true;

        }

    }

    return false;

}

} // namespace doris

#include "common/compile_check_end.h"