// 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 "core/column/column_array.h"

#include "core/data_type/data_type_array.h"

#include "core/data_type/data_type_number.h"

#include "exprs/function/array/function_array_utils.h"

#include "exprs/function/function.h"

#include "exprs/function/function_helpers.h"

namespace doris {

// Functions with arguments is two arrays of the same element type.

template <typename Impl, typename Name>

class FunctionArrayBinary : public IFunction {

public:

    static constexpr auto name = Name::name;

    static FunctionPtr create() { return std::make_shared<FunctionArrayBinary>(); }

    String get_name() const override { return name; }

    bool is_variadic() const override { return false; }

    size_t get_number_of_arguments() const override { return 2; }

    DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {

        DCHECK(arguments[0]->get_primitive_type() == TYPE_ARRAY) << arguments[0]->get_name();

        DCHECK(arguments[1]->get_primitive_type() == TYPE_ARRAY) << arguments[1]->get_name();

        auto left_nested_type = remove_nullable(

                assert_cast<const DataTypeArray&>(*(arguments[0])).get_nested_type());

        auto right_nested_type = remove_nullable(

                assert_cast<const DataTypeArray&>(*(arguments[1])).get_nested_type());

        DCHECK(left_nested_type->equals_ignore_precision(*right_nested_type))

                << "data type " << arguments[0]->get_name() << " not equal with "

                << arguments[1]->get_name();

        return Impl::get_return_type(arguments);

    }

    Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments,

                        uint32_t result, size_t input_rows_count) const override {

        const auto& [left_column, left_const] =

                unpack_if_const(block.get_by_position(arguments[0]).column);

        const auto& [right_column, right_const] =

                unpack_if_const(block.get_by_position(arguments[1]).column);

        // extract array column

        ColumnArrayExecutionData left_data;

        ColumnArrayExecutionData right_data;

        ColumnPtr res_ptr = nullptr;

        if (extract_column_array_info(*left_column, left_data) &&

            extract_column_array_info(*right_column, right_data) &&

            Impl::execute(res_ptr, left_data, right_data, left_const, right_const) ==

                    Status::OK()) {

            block.replace_by_position(result, std::move(res_ptr));

            return Status::OK();

        }

        return Status::RuntimeError(

                fmt::format("execute failed, unsupported types for function {}({}, {})", get_name(),

                            block.get_by_position(arguments[0]).type->get_name(),

                            block.get_by_position(arguments[1]).type->get_name()));

    }

};

} // namespace doris