// 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 "scheduler/optimizer/OnlyGPUPass.h"
#include "scheduler/SchedInst.h"
#include "scheduler/Utils.h"
#include "scheduler/task/SearchTask.h"
#include "scheduler/tasklabel/SpecResLabel.h"
#include "server/Config.h"

namespace milvus {
namespace scheduler {

bool
OnlyGPUPass::Run(const TaskPtr& task) {
    if (task->Type() != TaskType::SearchTask)
        return false;

    auto search_task = std::static_pointer_cast<XSearchTask>(task);
    if (search_task->file_->engine_type_ != (int)engine::EngineType::FAISS_IVFSQ8 &&
        search_task->file_->engine_type_ != (int)engine::EngineType::FAISS_IVFFLAT) {
        return false;
    }

    server::Config& config = server::Config::GetInstance();
    std::vector<std::string> search_resources;
    config.GetResourceConfigSearchResources(search_resources);
    for (auto& resource : search_resources) {
        if (resource == "cpu") {
            return false;
        }
    }

    auto gpu_id = get_gpu_pool();
    if (!gpu_id.empty()) {
        ResourcePtr res_ptr = ResMgrInst::GetInstance()->GetResource(ResourceType::GPU, gpu_id[specified_gpu_id_]);
        auto label = std::make_shared<SpecResLabel>(std::weak_ptr<Resource>(res_ptr));
        task->label() = label;
    } else {
        return false;
    }

    if (specified_gpu_id_ < gpu_id.size() - 1) {
        ++specified_gpu_id_;
    } else {
        specified_gpu_id_ = 0;
    }
    return true;
}

}  // namespace scheduler
}  // namespace milvus