// 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.
// This file is copied from
// https://github.com/ClickHouse/ClickHouse/blob/master/src/AggregateFunctions/AggregateFunctionBitwise.h
// and modified by Doris

#pragma once

#include <vector>

#include "vec/aggregate_functions/aggregate_function.h"
#include "vec/columns/column_vector.h"
#include "vec/data_types/data_type_number.h"
#include "vec/io/io_helper.h"

namespace doris::vectorized {

template <typename T>
struct AggregateFunctionBaseData {
public:
    AggregateFunctionBaseData(T init_value) : res_bit(init_value) {}
    void write(BufferWritable& buf) const { write_binary(res_bit, buf); }
    void read(BufferReadable& buf) { read_binary(res_bit, buf); }
    T get() const { return res_bit; }

protected:
    T res_bit = {};
};

template <typename T>
struct AggregateFunctionGroupBitOrData : public AggregateFunctionBaseData<T> {
public:
    static constexpr auto name = "group_bit_or";
    AggregateFunctionGroupBitOrData() : AggregateFunctionBaseData<T>(0) {}

    void add(T value) { AggregateFunctionBaseData<T>::res_bit |= value; }

    void merge(const AggregateFunctionGroupBitOrData<T>& rhs) {
        AggregateFunctionBaseData<T>::res_bit |= rhs.res_bit;
    }

    void reset() { AggregateFunctionBaseData<T>::res_bit = 0; }
};

template <typename T>
struct AggregateFunctionGroupBitAndData : public AggregateFunctionBaseData<T> {
public:
    static constexpr auto name = "group_bit_and";
    AggregateFunctionGroupBitAndData() : AggregateFunctionBaseData<T>(-1) {}

    void add(T value) { AggregateFunctionBaseData<T>::res_bit &= value; }

    void merge(const AggregateFunctionGroupBitAndData<T>& rhs) {
        AggregateFunctionBaseData<T>::res_bit &= rhs.res_bit;
    }

    void reset() { AggregateFunctionBaseData<T>::res_bit = -1; }
};

template <typename T>
struct AggregateFunctionGroupBitXorData : public AggregateFunctionBaseData<T> {
    static constexpr auto name = "group_bit_xor";
    AggregateFunctionGroupBitXorData() : AggregateFunctionBaseData<T>(0) {}

    void add(T value) { AggregateFunctionBaseData<T>::res_bit ^= value; }

    void merge(const AggregateFunctionGroupBitXorData& rhs) {
        AggregateFunctionBaseData<T>::res_bit ^= rhs.res_bit;
    }

    void reset() { AggregateFunctionBaseData<T>::res_bit = 0; }
};

/// Counts bitwise operation on numbers.
template <typename T, typename Data>
class AggregateFunctionBitwise final
        : public IAggregateFunctionDataHelper<Data, AggregateFunctionBitwise<T, Data>> {
public:
    AggregateFunctionBitwise(const DataTypes& argument_types_)
            : IAggregateFunctionDataHelper<Data, AggregateFunctionBitwise<T, Data>>(
                      argument_types_) {}

    String get_name() const override { return Data::name; }

    DataTypePtr get_return_type() const override { return std::make_shared<DataTypeNumber<T>>(); }

    void add(AggregateDataPtr __restrict place, const IColumn** columns, size_t row_num,
             Arena*) const override {
        const auto& column = static_cast<const ColumnVector<T>&>(*columns[0]);
        this->data(place).add(column.get_data()[row_num]);
    }

    void reset(AggregateDataPtr place) const override { this->data(place).reset(); }

    void merge(AggregateDataPtr __restrict place, ConstAggregateDataPtr rhs,
               Arena*) const override {
        this->data(place).merge(this->data(rhs));
    }

    void serialize(ConstAggregateDataPtr __restrict place, BufferWritable& buf) const override {
        this->data(place).write(buf);
    }

    void deserialize(AggregateDataPtr __restrict place, BufferReadable& buf,
                     Arena*) const override {
        this->data(place).read(buf);
    }

    void insert_result_into(ConstAggregateDataPtr __restrict place, IColumn& to) const override {
        auto& column = static_cast<ColumnVector<T>&>(to);
        column.get_data().push_back(this->data(place).get());
    }
};

} // namespace doris::vectorized