// 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 <condition_variable>

#include <memory>

#include <mutex>

#include <unordered_map>

#include <utility>

#include "common/compiler_util.h" // IWYU pragma: keep

#include "common/status.h"

#include "load/channel/load_stream.h"

#include "util/threadpool.h"

namespace doris {

class POpenStreamSinkRequest;

class LoadStreamMgr {

public:

    LoadStreamMgr(uint32_t segment_file_writer_thread_num);

    ~LoadStreamMgr();

    Status open_load_stream(const POpenLoadStreamRequest* request, LoadStream*& load_stream);

    void clear_load(UniqueId loadid);

    void create_token(std::unique_ptr<ThreadPoolToken>& token) {

        token = _file_writer_thread_pool->new_token(ThreadPool::ExecutionMode::SERIAL);

    }

    std::vector<std::string> get_all_load_stream_ids() {

        std::vector<std::string> result;

        std::lock_guard<std::mutex> lock(_lock);

        for (auto& [id, _] : _load_streams_map) {

            result.push_back(id.to_string());

        }

        return result;

    }

    // only used by ut

    size_t get_load_stream_num() { return _load_streams_map.size(); }

    FifoThreadPool* heavy_work_pool() { return _heavy_work_pool; }

    void set_heavy_work_pool(FifoThreadPool* pool) { _heavy_work_pool = pool; }

private:

    std::mutex _lock;

    std::unordered_map<UniqueId, LoadStreamPtr> _load_streams_map;

    std::unique_ptr<ThreadPool> _file_writer_thread_pool;

    FifoThreadPool* _heavy_work_pool = nullptr;

};

} // namespace doris