// 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"

namespace milvus {
namespace scheduler {

OnlyGPUPass::OnlyGPUPass(bool has_cpu) : has_cpu_(has_cpu) {
}

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

    auto gpu_id = get_gpu_pool();
    if (gpu_id.empty())
        return false;

    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;

    specified_gpu_id_ = specified_gpu_id_++ % gpu_id.size();
    return true;
}

}  // namespace scheduler
}  // namespace milvus