// 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 "exec/pipeline/dependency.h"

namespace doris {

struct DistinctDataVariants;

struct RecCTESharedState : public BasicSharedState {

    // Defined in rec_cte_shared_state.cpp: DistinctDataVariants carries the

    // full hash-table variant machinery.

    RecCTESharedState();

    ~RecCTESharedState() override;

    std::vector<TRecCTETarget> targets;

    std::vector<Block> blocks;

    IColumn::Selector distinct_row;

    Dependency* source_dep = nullptr;

    Dependency* anchor_dep = nullptr;

    Arena arena;

    RuntimeProfile::Counter* hash_table_compute_timer = nullptr;

    RuntimeProfile::Counter* hash_table_emplace_timer = nullptr;

    RuntimeProfile::Counter* hash_table_input_counter = nullptr;

    // No `= nullptr` initializer: a default member initializer makes GCC

    // instantiate ~unique_ptr<DistinctDataVariants> in every TU that merely sees

    // this class, which needs the complete type. The defaulted constructor in

    // rec_cte_shared_state.cpp already leaves this null.

    std::unique_ptr<DistinctDataVariants> agg_data;

    int current_round = 0;

    int last_round_offset = 0;

    int max_recursion_depth = 0;

    bool ready_to_return = false;

    void update_ready_to_return() {

        if (last_round_offset == blocks.size()) {

            ready_to_return = true;

        }

    }

    // Bodies live in rec_cte_shared_state.cpp: they touch the distinct hash

    // table variant machinery and the brpc client stack.

    Status emplace_block(RuntimeState* state, Block&& block);

    PTransmitRecCTEBlockParams build_basic_param(RuntimeState* state,

                                                 const TRecCTETarget& target) const;

    Status send_data_to_targets(RuntimeState* state, size_t round_offset) const;

};

} // namespace doris