// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed 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 <gtest/gtest.h>
#include <fiu-local.h>
#include <fiu-control.h>

#include "src/scheduler/SchedInst.h"
#include "cache/DataObj.h"
#include "cache/GpuCacheMgr.h"
#include "scheduler/ResourceFactory.h"
#include "scheduler/Scheduler.h"
#include "scheduler/resource/Resource.h"
#include "scheduler/task/TestTask.h"
#include "scheduler/tasklabel/SpecResLabel.h"
#include "utils/Error.h"
#include "wrapper/VecIndex.h"

namespace milvus {
namespace scheduler {

class MockVecIndex : public engine::VecIndex {
 public:
    virtual Status
    BuildAll(const int64_t& nb, const float* xb, const int64_t* ids, const engine::Config& cfg, const int64_t& nt = 0,
             const float* xt = nullptr) {
    }

    //    engine::VecIndexPtr
    //    Clone() override {
    //        return milvus::engine::VecIndexPtr();
    //    }

    int64_t
    GetDeviceId() override {
        return 0;
    }

    engine::IndexType
    GetType() const override {
        return engine::IndexType::INVALID;
    }

    virtual Status
    Add(const int64_t& nb, const float* xb, const int64_t* ids, const engine::Config& cfg = engine::Config()) {
    }

    virtual Status
    Search(const int64_t& nq, const float* xq, float* dist, int64_t* ids,
           const engine::Config& cfg = engine::Config()) {
    }

    engine::VecIndexPtr
    CopyToGpu(const int64_t& device_id, const engine::Config& cfg) override {
    }

    engine::VecIndexPtr
    CopyToCpu(const engine::Config& cfg) override {
    }

    virtual int64_t
    Dimension() {
        return dimension_;
    }

    virtual int64_t
    Count() {
        return ntotal_;
    }

    virtual knowhere::BinarySet
    Serialize() {
        knowhere::BinarySet binset;
        return binset;
    }

    virtual Status
    Load(const knowhere::BinarySet& index_binary) {
    }

 public:
    int64_t dimension_ = 512;
    int64_t ntotal_ = 0;
};

class SchedulerTest : public testing::Test {
 protected:
    void
    SetUp() override {
        res_mgr_ = std::make_shared<ResourceMgr>();
        ResourcePtr disk = ResourceFactory::Create("disk", "DISK", 0, false);
        ResourcePtr cpu = ResourceFactory::Create("cpu", "CPU", 0, true);
        disk_resource_ = res_mgr_->Add(std::move(disk));
        cpu_resource_ = res_mgr_->Add(std::move(cpu));

#ifdef MILVUS_GPU_VERSION
        constexpr int64_t cache_cap = 1024 * 1024 * 1024;
        cache::GpuCacheMgr::GetInstance(0)->SetCapacity(cache_cap);
        cache::GpuCacheMgr::GetInstance(1)->SetCapacity(cache_cap);
        ResourcePtr gpu_0 = ResourceFactory::Create("gpu0", "GPU", 0);
        ResourcePtr gpu_1 = ResourceFactory::Create("gpu1", "GPU", 1);
        gpu_resource_0_ = res_mgr_->Add(std::move(gpu_0));
        gpu_resource_1_ = res_mgr_->Add(std::move(gpu_1));

        auto PCIE = Connection("IO", 11000.0);
        res_mgr_->Connect("cpu", "gpu0", PCIE);
        res_mgr_->Connect("cpu", "gpu1", PCIE);
#endif

        scheduler_ = std::make_shared<Scheduler>(res_mgr_);

        res_mgr_->Start();
        scheduler_->Start();
    }

    void
    TearDown() override {
        scheduler_->Stop();
        res_mgr_->Stop();
    }

    ResourceWPtr disk_resource_;
    ResourceWPtr cpu_resource_;
    ResourceWPtr gpu_resource_0_;
    ResourceWPtr gpu_resource_1_;

    ResourceMgrPtr res_mgr_;
    std::shared_ptr<Scheduler> scheduler_;
};

class SchedulerTest2 : public testing::Test {
 protected:
    void
    SetUp() override {
        ResourcePtr disk = ResourceFactory::Create("disk", "DISK", 0, false);
        ResourcePtr cpu0 = ResourceFactory::Create("cpu0", "CPU", 0, false);
        ResourcePtr cpu1 = ResourceFactory::Create("cpu1", "CPU", 1, false);
        ResourcePtr cpu2 = ResourceFactory::Create("cpu2", "CPU", 2, false);

        res_mgr_ = std::make_shared<ResourceMgr>();
        disk_ = res_mgr_->Add(std::move(disk));
        cpu_0_ = res_mgr_->Add(std::move(cpu0));
        cpu_1_ = res_mgr_->Add(std::move(cpu1));
        cpu_2_ = res_mgr_->Add(std::move(cpu2));

        auto IO = Connection("IO", 5.0);
        auto PCIE1 = Connection("PCIE", 11.0);
        auto PCIE2 = Connection("PCIE", 20.0);
        res_mgr_->Connect("disk", "cpu0", IO);
        res_mgr_->Connect("cpu0", "cpu1", IO);
        res_mgr_->Connect("cpu1", "cpu2", IO);
        res_mgr_->Connect("cpu0", "cpu2", IO);

#ifdef MILVUS_GPU_VERSION
        ResourcePtr gpu0 = ResourceFactory::Create("gpu0", "GPU", 0);
        ResourcePtr gpu1 = ResourceFactory::Create("gpu1", "GPU", 1);
        gpu_0_ = res_mgr_->Add(std::move(gpu0));
        gpu_1_ = res_mgr_->Add(std::move(gpu1));
        res_mgr_->Connect("cpu1", "gpu0", PCIE1);
        res_mgr_->Connect("cpu2", "gpu1", PCIE2);
#endif

        scheduler_ = std::make_shared<Scheduler>(res_mgr_);

        res_mgr_->Start();
        scheduler_->Start();
    }

    void
    TearDown() override {
        scheduler_->Stop();
        res_mgr_->Stop();
        res_mgr_->Clear();
    }

    ResourceWPtr disk_;
    ResourceWPtr cpu_0_;
    ResourceWPtr cpu_1_;
    ResourceWPtr cpu_2_;
    ResourceWPtr gpu_0_;
    ResourceWPtr gpu_1_;
    ResourceMgrPtr res_mgr_;

    std::shared_ptr<Scheduler> scheduler_;
};

// TEST_F(SchedulerTest2, SPECIFIED_RESOURCE_TEST) {
//    const uint64_t NUM = 2;
//    std::vector<std::shared_ptr<TestTask>> tasks;
//    TableFileSchemaPtr dummy = std::make_shared<TableFileSchema>();
//    dummy->location_ = "location";
//
//    for (uint64_t i = 0; i < NUM; ++i) {
//        auto label = std::make_shared<DefaultLabel>();
//        std::shared_ptr<TestTask> task = std::make_shared<TestTask>(dummy, label);
//        task->label() = std::make_shared<SpecResLabel>(disk_);
//        tasks.push_back(task);
//        disk_.lock()->task_table().Put(task);
//    }

//    ASSERT_EQ(res_mgr_->GetResource(ResourceType::GPU, 1)->task_table().Size(), NUM);
//}

TEST(SchedulerTestResource, SPECIFIED_RESOURCE_TEST) {
    auto mock_index_ptr = std::make_shared<MockVecIndex>();
    milvus::engine::Config config;
    auto quantizer_ptr = mock_index_ptr->LoadQuantizer(config);
    ASSERT_EQ(quantizer_ptr, nullptr);

    auto vec_index_ptr = mock_index_ptr->LoadData(quantizer_ptr, config);
    ASSERT_EQ(vec_index_ptr, nullptr);

    auto s = mock_index_ptr->SetQuantizer(quantizer_ptr);
    ASSERT_TRUE(s.ok());

    s = mock_index_ptr->UnsetQuantizer();
    ASSERT_TRUE(s.ok());

    auto res = mock_index_ptr->CopyToGpuWithQuantizer(0, config);
    ASSERT_EQ(res.first, nullptr);
    ASSERT_EQ(res.second, nullptr);

    using IndexType = milvus::engine::IndexType;
    auto index = GetVecIndexFactory(IndexType::SPTAG_KDT_RNT_CPU, config);
    ASSERT_EQ(index->GetType(), IndexType::SPTAG_KDT_RNT_CPU);

    index = GetVecIndexFactory(IndexType::SPTAG_BKT_RNT_CPU, config);
    ASSERT_EQ(index->GetType(), IndexType::SPTAG_BKT_RNT_CPU);

#ifdef MILVUS_GPU_VERSION
    index = GetVecIndexFactory(IndexType::FAISS_IVFPQ_GPU, config);
    ASSERT_EQ(index->GetType(), IndexType::FAISS_IVFPQ_GPU);
#endif

    index = GetVecIndexFactory(IndexType::NSG_MIX, config);
    ASSERT_EQ(index->GetType(), IndexType::NSG_MIX);

    index = GetVecIndexFactory(IndexType::INVALID, config);
    ASSERT_EQ(index, nullptr);

    knowhere::BinarySet empty_set;
    auto res_ptr = LoadVecIndex(IndexType::INVALID, empty_set, 0);
    ASSERT_EQ(res_ptr, nullptr);
}

TEST_F(SchedulerTest, schedule) {
    scheduler_->Dump();
}

TEST(SchedulerService, service) {
    fiu_enable("load_simple_config_mock", 1, nullptr, 0);
    StartSchedulerService();
    StopSchedulerService();
    fiu_disable("load_simple_config_mock");
}

}  // namespace scheduler
}  // namespace milvus