// 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.

#include <stddef.h>

#include <boost/iterator/iterator_facade.hpp>

// IWYU pragma: no_include <bits/chrono.h>

#include <algorithm>

#include <chrono> // IWYU pragma: keep

#include <memory>

#include <string>

#include <thread>

#include <utility>

#include "common/status.h"

#include "core/assert_cast.h"

#include "core/block/block.h"

#include "core/block/column_numbers.h"

#include "core/block/column_with_type_and_name.h"

#include "core/block/columns_with_type_and_name.h"

#include "core/column/column.h"

#include "core/column/column_const.h"

#include "core/column/column_nullable.h"

#include "core/column/column_string.h"

#include "core/column/column_vector.h"

#include "core/data_type/data_type.h"

#include "core/data_type/data_type_nullable.h"

#include "core/data_type/data_type_number.h"

#include "core/data_type/data_type_string.h"

#include "core/types.h"

#include "exprs/aggregate/aggregate_function.h"

#include "exprs/function/function.h"

#include "exprs/function/simple_function_factory.h"

namespace doris {

class FunctionContext;

} // namespace doris

namespace doris {

class FunctionSleep : public IFunction {

public:

    static constexpr auto name = "sleep";

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

    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 {

        if (arguments[0]->is_nullable()) {

            return make_nullable(std::make_shared<DataTypeUInt8>());

        }

        return std::make_shared<DataTypeUInt8>();

    }

    bool use_default_implementation_for_nulls() const override { return false; }

    // Sleep function should not be executed during open stage, this will makes fragment prepare

    // waiting too long, so we do not use default impl.

    bool use_default_implementation_for_constants() const override { return false; }

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

                        uint32_t result, size_t input_rows_count) const override {

        const auto& argument_column =

                block.get_by_position(arguments[0]).column->convert_to_full_column_if_const();

        auto res_column = ColumnUInt8::create(input_rows_count, 0);

        if (auto* nullable_column = check_and_get_column<ColumnNullable>(*argument_column)) {

            auto null_map_column = ColumnUInt8::create();

            auto nested_column = nullable_column->get_nested_column_ptr();

            auto data_column = assert_cast<const ColumnInt32*>(nested_column.get());

            for (int i = 0; i < input_rows_count; i++) {

                if (nullable_column->is_null_at(i)) {

                    null_map_column->insert(Field::create_field<TYPE_BOOLEAN>(1));

                } else {

                    int seconds = data_column->get_data()[i];

                    std::this_thread::sleep_for(std::chrono::seconds(seconds));

                    null_map_column->insert(Field::create_field<TYPE_BOOLEAN>(0));

                }

            }

            block.replace_by_position(result, ColumnNullable::create(std::move(res_column),

                                                                     std::move(null_map_column)));

        } else {

            auto data_column = assert_cast<const ColumnInt32*>(argument_column.get());

            for (int i = 0; i < input_rows_count; i++) {

                int seconds = data_column->get_element(i);

                std::this_thread::sleep_for(std::chrono::seconds(seconds));

            }

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

        }

        return Status::OK();

    }

};

class FunctionVersion : public IFunction {

public:

    static constexpr auto name = "version";

    static const std::string version;

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

    String get_name() const override { return name; }

    size_t get_number_of_arguments() const override { return 0; }

    DataTypePtr get_return_type_impl(const ColumnsWithTypeAndName& arguments) const override {

        return std::make_shared<DataTypeString>();

    }

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

                        uint32_t result, size_t input_rows_count) const override {

        auto res_column = ColumnString::create();

        res_column->insert_data(version.c_str(), version.length());

        auto col_const = ColumnConst::create(std::move(res_column), input_rows_count);

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

        return Status::OK();

    }

};

const std::string FunctionVersion::version = "5.7.99";

void register_function_utility(SimpleFunctionFactory& factory) {

    factory.register_function<FunctionSleep>();

    factory.register_function<FunctionVersion>();

}

} // namespace doris