// Licensed to the LF AI & Data foundation 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 "PlanNode.h"

#include <cstddef>

namespace milvus {
namespace plan {

RowTypePtr
getAggregationOutputType(
    const std::vector<expr::FieldAccessTypeExprPtr>& groupingKeys,
    const std::vector<std::string>& aggregateNames,
    const std::vector<AggregationNode::Aggregate>& aggregates) {
    std::vector<std::string> names;
    std::vector<milvus::DataType> types;
    for (auto& key : groupingKeys) {
        names.emplace_back(key->name());
        types.emplace_back(key->type());
    }

    AssertInfo(aggregateNames.size() == aggregates.size(),
               "aggregateNames and aggregates size mismatch: "
               "aggregateNames.size()={}, "
               "aggregates.size()={}",
               aggregateNames.size(),
               aggregates.size());

    for (size_t i = 0; i < aggregateNames.size(); i++) {
        names.emplace_back(aggregateNames[i]);
        types.emplace_back(aggregates[i].resultType_);
    }

    return std::make_shared<RowType>(std::move(names), std::move(types));
}

AggregationNode::AggregationNode(
    const milvus::plan::PlanNodeId& id,
    std::vector<expr::FieldAccessTypeExprPtr>&& groupingKeys,
    std::vector<std::string>&& aggNames,
    std::vector<Aggregate>&& aggregates,
    std::vector<PlanNodePtr> sources)
    : PlanNode(id),
      groupingKeys_(std::move(groupingKeys)),
      aggregateNames_(std::move(aggNames)),
      aggregates_(std::move(aggregates)),
      sources_(std::move(sources)),
      output_type_(getAggregationOutputType(
          groupingKeys_, aggregateNames_, aggregates_)) {
}

}  // namespace plan
}  // namespace milvus