// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// 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

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

#pragma once

#include <glog/logging.h>

#include <stdint.h>

#include <ostream>

#include <string>

#include <utility>

#include "common/status.h"

#include "olap/column_predicate.h"

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

#include "olap/schema.h"

#include "olap/wrapper_field.h"

#include "vec/exec/format/parquet/parquet_predicate.h"

namespace roaring {

class Roaring;

} // namespace roaring

namespace doris {

namespace segment_v2 {

class InvertedIndexIterator;

} // namespace segment_v2

namespace vectorized {

class IColumn;

} // namespace vectorized

class NullPredicate final : public ColumnPredicate {

public:

    ENABLE_FACTORY_CREATOR(NullPredicate);

    NullPredicate(uint32_t column_id, std::string col_name, bool is_null, PrimitiveType type,

                  bool opposite = false);

    NullPredicate(const NullPredicate& other) = delete;

    NullPredicate(const NullPredicate& other, uint32_t column_id)

            : ColumnPredicate(other, column_id), _is_null(other._is_null) {}

    ~NullPredicate() override = default;

    std::shared_ptr<ColumnPredicate> clone(uint32_t column_id) const override {

        return NullPredicate::create_shared(*this, column_id);

    }

    std::string debug_string() const override {

        fmt::memory_buffer debug_string_buffer;

        fmt::format_to(debug_string_buffer, "NullPredicate({}, is_null={})",

                       ColumnPredicate::debug_string(), _is_null);

        return fmt::to_string(debug_string_buffer);

    }

    bool could_be_erased() const override { return true; }

    PredicateType type() const override;

    Status evaluate(const vectorized::IndexFieldNameAndTypePair& name_with_type,

                    IndexIterator* iterator, uint32_t num_rows,

                    roaring::Roaring* bitmap) const override;

    void evaluate_or(const vectorized::IColumn& column, const uint16_t* sel, uint16_t size,

                     bool* flags) const override;

    void evaluate_and(const vectorized::IColumn& column, const uint16_t* sel, uint16_t size,

                      bool* flags) const override;

    bool evaluate_and(const ZoneMapInfo& zone_map_info) const override {

        if (_is_null) {

            return zone_map_info.has_null;

        } else {

            return !zone_map_info.is_all_null;

        }

    }

    bool evaluate_and(vectorized::ParquetPredicate::ColumnStat* statistic) const override {

        if (!(*statistic->get_stat_func)(statistic, column_id())) {

            return true;

        }

        if (_is_null) {

            return true;

        } else {

            return !statistic->is_all_null;

        }

    }

    bool evaluate_and(vectorized::ParquetPredicate::CachedPageIndexStat* statistic,

                      RowRanges* row_ranges) const override {

        vectorized::ParquetPredicate::PageIndexStat* stat = nullptr;

        if (!(statistic->get_stat_func)(&stat, column_id())) {

            row_ranges->add(statistic->row_group_range);

            return true;

        }

        for (int page_id = 0; page_id < stat->num_of_pages; page_id++) {

            if (_is_null || !stat->is_all_null[page_id]) {

                row_ranges->add(stat->ranges[page_id]);

            }

        };

        return row_ranges->count() > 0;

    }

    bool evaluate_del(const ZoneMapInfo& zone_map_info) const override {

        // evaluate_del only use for delete condition to filter page, need use delete condition origin value,

        // when opposite==true, origin value 'is null'->'is not null' and 'is not null'->'is null',

        // so when _is_null==true, need check 'is not null' and _is_null==false, need check 'is null'

        if (_is_null) {

            return !zone_map_info.has_null;

        } else {

            return zone_map_info.is_all_null;

        }

    }

    bool evaluate_and(const segment_v2::BloomFilter* bf) const override {

        // null predicate can not use ngram bf, just return true to accept

        if (bf->is_ngram_bf()) return true;

        if (_is_null) {

            return bf->test_bytes(nullptr, 0);

        } else {

            throw Exception(Status::FatalError(

                    "Bloom filter is not supported by predicate type: is_null="));

        }

    }

    bool can_do_bloom_filter(bool ngram) const override { return _is_null && !ngram; }

    void evaluate_vec(const vectorized::IColumn& column, uint16_t size, bool* flags) const override;

private:

    uint16_t _evaluate_inner(const vectorized::IColumn& column, uint16_t* sel,

                             uint16_t size) const override;

    bool _is_null; //true for null, false for not null

};

} //namespace doris