// 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 "exprs/function/array/function_array_reverse.h"

#include "exprs/function/function_string.h"

namespace doris {

class FunctionReverseCommon : public IFunction {

public:

    static constexpr auto name = "reverse";

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

    String get_name() const override { return name; }

    size_t get_number_of_arguments() const override { return 1; }

    DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {

        DCHECK(is_string_type(arguments[0]->get_primitive_type()) ||

               arguments[0]->get_primitive_type() == TYPE_ARRAY)

                << fmt::format("Illegal type {} used for argument of function {}",

                               arguments[0]->get_name(), get_name());

        return arguments[0];

    }

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

                        uint32_t result, size_t input_rows_count) const override {

        ColumnPtr& src_column = block.get_by_position(arguments[0]).column;

        if (const ColumnString* col_string = check_and_get_column<ColumnString>(src_column.get())) {

            auto col_res = ColumnString::create();

            RETURN_IF_ERROR(ReverseImpl::vector(col_string->get_chars(), col_string->get_offsets(),

                                                col_res->get_chars(), col_res->get_offsets()));

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

        } else if (is_column<ColumnArray>(src_column.get())) {

            return ArrayReverseImpl::_execute(block, arguments, result, input_rows_count);

        } else {

            return Status::RuntimeError("Illegal column {} used for argument of function {}",

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

                                        get_name());

        }

        return Status::OK();

    }

};

} // namespace doris