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// 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 "exprs/aggregate/aggregate_function_collect.h"

#include "exprs/aggregate/aggregate_function_simple_factory.h"

#include "exprs/aggregate/factory_helpers.h"

#include "exprs/aggregate/helpers.h"

namespace doris {

// Forward declarations — template instantiations live in separate TUs

AggregateFunctionPtr create_aggregate_function_collect_no_limit(const std::string& name,

                                                                const DataTypes& argument_types,

                                                                const bool result_is_nullable,

                                                                const AggregateFunctionAttr& attr);

AggregateFunctionPtr create_aggregate_function_collect_with_limit(

        const std::string& name, const DataTypes& argument_types, const bool result_is_nullable,

        const AggregateFunctionAttr& attr);

AggregateFunctionPtr create_aggregate_function_collect(const std::string& name,

                                                       const DataTypes& argument_types,

                                                       const DataTypePtr& result_type,

                                                       const bool result_is_nullable,

                                                       const AggregateFunctionAttr& attr) {

    assert_arity_range(name, argument_types, 1, 2);

    if (argument_types.size() == 1) {

        return create_aggregate_function_collect_no_limit(name, argument_types, result_is_nullable,

                                                          attr);

    }

    if (argument_types.size() == 2) {

        return create_aggregate_function_collect_with_limit(name, argument_types,

                                                            result_is_nullable, attr);

    }

    return nullptr;

}

void register_aggregate_function_collect_list(AggregateFunctionSimpleFactory& factory) {

    // notice: array_agg only differs from collect_list in that array_agg will show null elements in array

    factory.register_function_both("collect_list", create_aggregate_function_collect);

    factory.register_function_both("collect_set", create_aggregate_function_collect);

    factory.register_alias("collect_list", "group_array");

    factory.register_alias("collect_set", "group_uniq_array");

}

} // namespace doris