// 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 <fiu-local.h>
#include <fiu-control.h>
#include <gtest/gtest.h>
#include <opentracing/mocktracer/tracer.h>
#include <src/scheduler/SchedInst.h>
#include <src/scheduler/resource/CpuResource.h>

#include "db/meta/SqliteMetaImpl.h"
#include "db/DBFactory.h"
#include "scheduler/tasklabel/BroadcastLabel.h"
#include "scheduler/task/BuildIndexTask.h"
#include "scheduler/task/SearchTask.h"
#include "scheduler/task/TestTask.h"

namespace milvus {
namespace scheduler {

TEST(TaskTest, INVALID_INDEX) {
    auto dummy_context = std::make_shared<milvus::server::Context>("dummy_request_id");
    opentracing::mocktracer::MockTracerOptions tracer_options;
    auto mock_tracer =
        std::shared_ptr<opentracing::Tracer>{new opentracing::mocktracer::MockTracer{std::move(tracer_options)}};
    auto mock_span = mock_tracer->StartSpan("mock_span");
    auto trace_context = std::make_shared<milvus::tracing::TraceContext>(mock_span);
    dummy_context->SetTraceContext(trace_context);

    SegmentSchemaPtr dummy_file = std::make_shared<engine::meta::SegmentSchema>();
    dummy_file->index_params_ = "{ \"nlist\": 16384 }";
    dummy_file->dimension_ = 64;
    auto search_task =
        std::make_shared<XSearchTask>(dummy_context, dummy_file, nullptr);
    search_task->Load(LoadType::TEST, 10);

    auto build_task = std::make_shared<XBuildIndexTask>(nullptr, nullptr);
    build_task->Load(LoadType::TEST, 10);

    build_task->Execute();
}

TEST(TaskTest, TEST_TASK) {
    auto dummy_context = std::make_shared<milvus::server::Context>("dummy_request_id");

    auto file = std::make_shared<SegmentSchema>();
    file->index_params_ = "{ \"nlist\": 16384 }";
    file->dimension_ = 64;
    auto label = std::make_shared<BroadcastLabel>();

    TestTask task(dummy_context, file, label);
    task.Load(LoadType::CPU2GPU, 0);
    auto th = std::thread([&]() {
        task.Execute();
    });
    task.Wait();

    if (th.joinable()) {
        th.join();
    }

    static const char* CONFIG_PATH = "/tmp/milvus_test";
    auto options = milvus::engine::DBFactory::BuildOption();
    options.meta_.path_ = CONFIG_PATH;
    options.meta_.backend_uri_ = "sqlite://:@:/";
    options.insert_cache_immediately_ = true;
    auto meta_ptr = std::make_shared<milvus::engine::meta::SqliteMetaImpl>(options.meta_);

    file->collection_id_ = "111";
    file->location_ = "/tmp/milvus_test/index_file1.txt";
    auto build_index_job = std::make_shared<BuildIndexJob>(meta_ptr, options);
    XBuildIndexTask build_index_task(file, label);
    build_index_task.job_ = build_index_job;

    build_index_task.Load(LoadType::TEST, 0);

    fiu_init(0);
    fiu_enable("XBuildIndexTask.Load.throw_std_exception", 1, NULL, 0);
    build_index_task.Load(LoadType::TEST, 0);
    fiu_disable("XBuildIndexTask.Load.throw_std_exception");

    fiu_enable("XBuildIndexTask.Load.out_of_memory", 1, NULL, 0);
    build_index_task.Load(LoadType::TEST, 0);
    fiu_disable("XBuildIndexTask.Load.out_of_memory");

    build_index_task.Execute();
    // always enable 'create_table_success'
    fiu_enable("XBuildIndexTask.Execute.create_table_success", 1, NULL, 0);

    milvus::json json = {{"nlist", 16384}};
    build_index_task.to_index_engine_ =
        EngineFactory::Build(file->dimension_, file->location_, (EngineType)file->engine_type_,
                             (MetricType)file->metric_type_, json);

    build_index_task.Execute();

    fiu_enable("XBuildIndexTask.Execute.build_index_fail", 1, NULL, 0);
    build_index_task.to_index_engine_ =
        EngineFactory::Build(file->dimension_, file->location_, (EngineType)file->engine_type_,
                             (MetricType)file->metric_type_, json);
    build_index_task.Execute();
    fiu_disable("XBuildIndexTask.Execute.build_index_fail");

    // always enable 'has_collection'
    fiu_enable("XBuildIndexTask.Execute.has_collection", 1, NULL, 0);
    build_index_task.to_index_engine_ =
        EngineFactory::Build(file->dimension_, file->location_, (EngineType)file->engine_type_,
                             (MetricType)file->metric_type_, json);
    build_index_task.Execute();

    fiu_enable("XBuildIndexTask.Execute.throw_std_exception", 1, NULL, 0);
    build_index_task.to_index_engine_ =
        EngineFactory::Build(file->dimension_, file->location_, (EngineType)file->engine_type_,
                             (MetricType)file->metric_type_, json);
    build_index_task.Execute();
    fiu_disable("XBuildIndexTask.Execute.throw_std_exception");

    fiu_enable("XBuildIndexTask.Execute.update_table_file_fail", 1, NULL, 0);
    build_index_task.to_index_engine_ =
        EngineFactory::Build(file->dimension_, file->location_, (EngineType)file->engine_type_,
                             (MetricType)file->metric_type_, json);
    build_index_task.Execute();
    fiu_disable("XBuildIndexTask.Execute.update_table_file_fail");

    fiu_disable("XBuildIndexTask.Execute.throw_std_exception");
    fiu_disable("XBuildIndexTask.Execute.has_collection");
    fiu_disable("XBuildIndexTask.Execute.create_table_success");
    build_index_task.Execute();

    // search task
    engine::VectorsData vector;
    auto search_job = std::make_shared<SearchJob>(dummy_context, 1, 1, vector);
    file->metric_type_ = static_cast<int>(MetricType::IP);
    file->engine_type_ = static_cast<int>(engine::EngineType::FAISS_IVFSQ8H);
    opentracing::mocktracer::MockTracerOptions tracer_options;
    auto mock_tracer =
        std::shared_ptr<opentracing::Tracer>{new opentracing::mocktracer::MockTracer{std::move(tracer_options)}};
    auto mock_span = mock_tracer->StartSpan("mock_span");
    auto trace_context = std::make_shared<milvus::tracing::TraceContext>(mock_span);
    dummy_context->SetTraceContext(trace_context);
    XSearchTask search_task(dummy_context, file, label);
    search_task.job_ = search_job;
    std::string cpu_resouce_name = "cpu_name1";
    std::vector<std::string> path = {cpu_resouce_name};
    search_task.task_path_ = Path(path, 0);
    ResMgrInst::GetInstance()->Add(std::make_shared<CpuResource>(cpu_resouce_name, 1, true));

    search_task.Load(LoadType::CPU2GPU, 0);
    search_task.Load(LoadType::GPU2CPU, 0);

    fiu_enable("XSearchTask.Load.throw_std_exception", 1, NULL, 0);
    search_task.Load(LoadType::GPU2CPU, 0);
    fiu_disable("XSearchTask.Load.throw_std_exception");

    fiu_enable("XSearchTask.Load.out_of_memory", 1, NULL, 0);
    search_task.Load(LoadType::GPU2CPU, 0);
    fiu_disable("XSearchTask.Load.out_of_memory");

    fiu_enable("XSearchTask.Execute.search_fail", 1, NULL, 0);
    search_task.Execute();
    fiu_disable("XSearchTask.Execute.search_fail");

    fiu_enable("XSearchTask.Execute.throw_std_exception", 1, NULL, 0);
    search_task.Execute();
    fiu_disable("XSearchTask.Execute.throw_std_exception");

    search_task.Execute();

    scheduler::ResultIds ids, tar_ids;
    scheduler::ResultDistances distances, tar_distances;
    XSearchTask::MergeTopkToResultSet(ids, distances, 1, 1, 1, true, tar_ids, tar_distances);
}

TEST(TaskTest, TEST_PATH) {
    Path path;
    auto empty_path = path.Current();
    ASSERT_TRUE(empty_path.empty());
    empty_path = path.Next();
    ASSERT_TRUE(empty_path.empty());
    empty_path = path.Last();
    ASSERT_TRUE(empty_path.empty());
}

}  // namespace scheduler
}  // namespace milvus