// 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 "utils/SignalUtil.h"
#include "utils/CommonUtil.h"
#include "utils/Error.h"
#include "utils/StringHelpFunctions.h"
#include "utils/TimeRecorder.h"
#include "utils/BlockingQueue.h"
#include "utils/LogUtil.h"
#include "utils/ValidationUtil.h"
#include "db/engine/ExecutionEngine.h"

#include <thread>
#include <sys/types.h>
#include <sys/stat.h>
#include <boost/filesystem.hpp>
#include <gtest/gtest.h>

using namespace zilliz::milvus;

namespace {

static const char* LOG_FILE_PATH = "./milvus/conf/log_config.conf";

void CopyStatus(Status& st1, Status& st2) {
    st1 = st2;
}

}

TEST(UtilTest, EXCEPTION_TEST) {
    std::string err_msg = "failed";
    server::ServerException ex(SERVER_UNEXPECTED_ERROR, err_msg);
    ASSERT_EQ(ex.error_code(), SERVER_UNEXPECTED_ERROR);
    std::string msg = ex.what();
    ASSERT_EQ(msg, err_msg);
}

TEST(UtilTest, SIGNAL_TEST) {
    server::SignalUtil::PrintStacktrace();
}

TEST(UtilTest, COMMON_TEST) {
    unsigned long total_mem = 0, free_mem = 0;
    server::CommonUtil::GetSystemMemInfo(total_mem, free_mem);
    ASSERT_GT(total_mem, 0);
    ASSERT_GT(free_mem, 0);

    unsigned int thread_cnt = 0;
    server::CommonUtil::GetSystemAvailableThreads(thread_cnt);
    ASSERT_GT(thread_cnt, 0);

    std::string path1 = "/tmp/milvus_test/";
    std::string path2 = path1 + "common_test_12345/";
    std::string path3 = path2 + "abcdef";
    Status status = server::CommonUtil::CreateDirectory(path3);
    ASSERT_TRUE(status.ok());
    //test again
    status = server::CommonUtil::CreateDirectory(path3);
    ASSERT_TRUE(status.ok());

    ASSERT_TRUE(server::CommonUtil::IsDirectoryExist(path3));

    status = server::CommonUtil::DeleteDirectory(path1);
    ASSERT_TRUE(status.ok());
    //test again
    status = server::CommonUtil::DeleteDirectory(path1);
    ASSERT_TRUE(status.ok());

    ASSERT_FALSE(server::CommonUtil::IsDirectoryExist(path1));
    ASSERT_FALSE(server::CommonUtil::IsFileExist(path1));

    std::string exe_path = server::CommonUtil::GetExePath();
    ASSERT_FALSE(exe_path.empty());

    time_t tt;
    time( &tt );
    tm time_struct;
    memset(&time_struct, 0, sizeof(tm));
    server::CommonUtil::ConvertTime(tt, time_struct);
    ASSERT_GT(time_struct.tm_year, 0);
    ASSERT_GT(time_struct.tm_mon, 0);
    ASSERT_GT(time_struct.tm_mday, 0);
    server::CommonUtil::ConvertTime(time_struct, tt);
    ASSERT_GT(tt, 0);

    bool res = server::CommonUtil::TimeStrToTime("2019-03-23", tt, time_struct);
    ASSERT_EQ(time_struct.tm_year, 119);
    ASSERT_EQ(time_struct.tm_mon, 2);
    ASSERT_EQ(time_struct.tm_mday, 23);
    ASSERT_GT(tt, 0);
    ASSERT_TRUE(res);
}

TEST(UtilTest, STRINGFUNCTIONS_TEST) {
    std::string str = " test zilliz";
    server::StringHelpFunctions::TrimStringBlank(str);
    ASSERT_EQ(str, "test zilliz");

    str = "\"test zilliz\"";
    server::StringHelpFunctions::TrimStringQuote(str, "\"");
    ASSERT_EQ(str, "test zilliz");

    str = "a,b,c";
    std::vector<std::string> result;
    auto status = server::StringHelpFunctions::SplitStringByDelimeter(str , ",", result);
    ASSERT_TRUE(status.ok());
    ASSERT_EQ(result.size(), 3UL);

    result.clear();
    status = server::StringHelpFunctions::SplitStringByQuote(str , ",", "\"", result);
    ASSERT_TRUE(status.ok());
    ASSERT_EQ(result.size(), 3UL);

    result.clear();
    status = server::StringHelpFunctions::SplitStringByQuote(str , ",", "", result);
    ASSERT_TRUE(status.ok());
    ASSERT_EQ(result.size(), 3UL);

    str = "55,\"aa,gg,yy\",b";
    result.clear();
    status = server::StringHelpFunctions::SplitStringByQuote(str , ",", "\"", result);
    ASSERT_TRUE(status.ok());
    ASSERT_EQ(result.size(), 3UL);


}

TEST(UtilTest, BLOCKINGQUEUE_TEST) {
    server::BlockingQueue<std::string> bq;

    static const size_t count = 10;
    bq.SetCapacity(count);

    for(size_t i = 1; i <= count; i++) {
        std::string id = "No." + std::to_string(i);
        bq.Put(id);
    }

    ASSERT_EQ(bq.Size(), count);
    ASSERT_FALSE(bq.Empty());

    std::string str = bq.Front();
    ASSERT_EQ(str, "No.1");

    str = bq.Back();
    ASSERT_EQ(str, "No." + std::to_string(count));

    for(size_t i = 1; i <= count; i++) {
        std::string id = "No." + std::to_string(i);
        str = bq.Take();
        ASSERT_EQ(id, str);
    }

    ASSERT_EQ(bq.Size(), 0);
}

TEST(UtilTest, LOG_TEST) {
    auto status = server::InitLog(LOG_FILE_PATH);
    ASSERT_TRUE(status.ok());

    EXPECT_FALSE(el::Loggers::hasFlag(el::LoggingFlag::NewLineForContainer));
    EXPECT_FALSE(el::Loggers::hasFlag(el::LoggingFlag::LogDetailedCrashReason));

    std::string fname = server::CommonUtil::GetFileName(LOG_FILE_PATH);
    ASSERT_EQ(fname, "log_config.conf");
}

TEST(UtilTest, TIMERECORDER_TEST) {
    for(int64_t log_level = 0; log_level <= 6; log_level++) {
        if(log_level == 5) {
            continue; //skip fatal
        }
        TimeRecorder rc("time", log_level);
        rc.RecordSection("end");
    }
}

TEST(UtilTest, STATUS_TEST) {
    auto status = Status::OK();
    std::string str = status.ToString();
    ASSERT_FALSE(str.empty());

    status = Status(DB_ERROR, "mistake");
    ASSERT_EQ(status.code(), DB_ERROR);
    str = status.ToString();
    ASSERT_FALSE(str.empty());

    status = Status(DB_NOT_FOUND, "mistake");
    ASSERT_EQ(status.code(), DB_NOT_FOUND);
    str = status.ToString();
    ASSERT_FALSE(str.empty());

    status = Status(DB_ALREADY_EXIST, "mistake");
    ASSERT_EQ(status.code(), DB_ALREADY_EXIST);
    str = status.ToString();
    ASSERT_FALSE(str.empty());

    status = Status(DB_META_TRANSACTION_FAILED, "mistake");
    ASSERT_EQ(status.code(), DB_META_TRANSACTION_FAILED);
    str = status.ToString();
    ASSERT_FALSE(str.empty());

    auto status_copy = Status::OK();
    CopyStatus(status_copy, status);
    ASSERT_EQ(status.code(), DB_META_TRANSACTION_FAILED);

    auto status_ref(status);
    ASSERT_EQ(status_ref.code(), status.code());
    ASSERT_EQ(status_ref.ToString(), status.ToString());

    auto status_move = std::move(status);
    ASSERT_EQ(status_move.code(), status_ref.code());
    ASSERT_EQ(status_move.ToString(), status_ref.ToString());
}

TEST(ValidationUtilTest, VALIDATE_TABLENAME_TEST) {
    std::string table_name = "Normal123_";
    auto status = server::ValidationUtil::ValidateTableName(table_name);
    ASSERT_TRUE(status.ok());

    table_name = "12sds";
    status = server::ValidationUtil::ValidateTableName(table_name);
    ASSERT_EQ(status.code(), SERVER_INVALID_TABLE_NAME);

    table_name = "";
    status = server::ValidationUtil::ValidateTableName(table_name);
    ASSERT_EQ(status.code(), SERVER_INVALID_TABLE_NAME);

    table_name = "_asdasd";
    status = server::ValidationUtil::ValidateTableName(table_name);
    ASSERT_EQ(status.code(), SERVER_SUCCESS);

    table_name = "!@#!@";
    status = server::ValidationUtil::ValidateTableName(table_name);
    ASSERT_EQ(status.code(), SERVER_INVALID_TABLE_NAME);

    table_name = "_!@#!@";
    status = server::ValidationUtil::ValidateTableName(table_name);
    ASSERT_EQ(status.code(), SERVER_INVALID_TABLE_NAME);

    table_name = "中文";
    status = server::ValidationUtil::ValidateTableName(table_name);
    ASSERT_EQ(status.code(), SERVER_INVALID_TABLE_NAME);

    table_name = std::string(10000, 'a');
    status = server::ValidationUtil::ValidateTableName(table_name);
    ASSERT_EQ(status.code(), SERVER_INVALID_TABLE_NAME);
}

TEST(ValidationUtilTest, VALIDATE_DIMENSION_TEST) {
    ASSERT_EQ(server::ValidationUtil::ValidateTableDimension(-1).code(), SERVER_INVALID_VECTOR_DIMENSION);
    ASSERT_EQ(server::ValidationUtil::ValidateTableDimension(0).code(), SERVER_INVALID_VECTOR_DIMENSION);
    ASSERT_EQ(server::ValidationUtil::ValidateTableDimension(16385).code(), SERVER_INVALID_VECTOR_DIMENSION);
    ASSERT_EQ(server::ValidationUtil::ValidateTableDimension(16384).code(), SERVER_SUCCESS);
    ASSERT_EQ(server::ValidationUtil::ValidateTableDimension(1).code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_INDEX_TEST) {
    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexType((int)engine::EngineType::INVALID).code(), SERVER_INVALID_INDEX_TYPE);
    for(int i = 1; i <= (int)engine::EngineType::MAX_VALUE; i++) {
        ASSERT_EQ(server::ValidationUtil::ValidateTableIndexType(i).code(), SERVER_SUCCESS);
    }
    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexType((int)engine::EngineType::MAX_VALUE + 1).code(), SERVER_INVALID_INDEX_TYPE);

    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexNlist(0).code(), SERVER_INVALID_INDEX_NLIST);
    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexNlist(100).code(), SERVER_SUCCESS);

    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexFileSize(0).code(), SERVER_INVALID_INDEX_FILE_SIZE);
    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexFileSize(100).code(), SERVER_SUCCESS);

    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexMetricType(0).code(), SERVER_INVALID_INDEX_METRIC_TYPE);
    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexMetricType(1).code(), SERVER_SUCCESS);
    ASSERT_EQ(server::ValidationUtil::ValidateTableIndexMetricType(2).code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_TOPK_TEST) {
    engine::meta::TableSchema schema;
    ASSERT_EQ(server::ValidationUtil::ValidateSearchTopk(10, schema).code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateSearchTopk(65536, schema).code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateSearchTopk(0, schema).code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_NPROBE_TEST) {
    engine::meta::TableSchema schema;
    schema.nlist_ = 100;
    ASSERT_EQ(server::ValidationUtil::ValidateSearchNprobe(10, schema).code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateSearchNprobe(0, schema).code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateSearchNprobe(101, schema).code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_GPU_TEST) {
    ASSERT_EQ(server::ValidationUtil::ValidateGpuIndex(0).code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateGpuIndex(100).code(), SERVER_SUCCESS);

    size_t memory = 0;
    ASSERT_EQ(server::ValidationUtil::GetGpuMemory(0, memory).code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::GetGpuMemory(100, memory).code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_IPADDRESS_TEST) {
    ASSERT_EQ(server::ValidationUtil::ValidateIpAddress("127.0.0.1").code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateIpAddress("not ip").code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_NUMBER_TEST) {
    ASSERT_EQ(server::ValidationUtil::ValidateStringIsNumber("1234").code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateStringIsNumber("not number").code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_BOOL_TEST) {
    std::string str = "true";
    ASSERT_EQ(server::ValidationUtil::ValidateStringIsBool(str).code(), SERVER_SUCCESS);
    str = "not bool";
    ASSERT_NE(server::ValidationUtil::ValidateStringIsBool(str).code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_DOUBLE_TEST) {
    double ret = 0.0;
    ASSERT_EQ(server::ValidationUtil::ValidateStringIsDouble("2.5", ret).code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateStringIsDouble("not double", ret).code(), SERVER_SUCCESS);
}

TEST(ValidationUtilTest, VALIDATE_DBURI_TEST) {
    ASSERT_EQ(server::ValidationUtil::ValidateDbURI("sqlite://:@:/").code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateDbURI("xxx://:@:/").code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateDbURI("not uri").code(), SERVER_SUCCESS);
    ASSERT_EQ(server::ValidationUtil::ValidateDbURI("mysql://root:123456@127.0.0.1:3303/milvus").code(), SERVER_SUCCESS);
    ASSERT_NE(server::ValidationUtil::ValidateDbURI("mysql://root:123456@127.0.0.1:port/milvus").code(), SERVER_SUCCESS);
}

TEST(UtilTest, ROLLOUTHANDLER_TEST){
    std::string dir1 = "/tmp/milvus_test";
    std::string dir2 = "/tmp/milvus_test/log_test";
    std::string filename[6] = {"log_global.log", "log_debug.log", "log_warning.log", "log_trace.log", "log_error.log", "log_fatal.log"};
    el::Level list[6] = {el::Level::Global, el::Level::Debug, el::Level::Warning, el::Level::Trace, el::Level::Error, el::Level::Fatal};

    mkdir(dir1.c_str(), S_IRWXU);
    mkdir(dir2.c_str(), S_IRWXU);
    for (int i = 0; i < 6; ++i) {
        std::string tmp = dir2 + "/" + filename[i];

        std::ofstream file;
        file.open(tmp.c_str());
        file << "zilliz" << std::endl;

        server::RolloutHandler(tmp.c_str(), 0, list[i]);

        tmp.append(".1");
        std::ifstream file2;
        file2.open(tmp);

        std::string tmp2;
        file2 >> tmp2;
        ASSERT_EQ(tmp2, "zilliz");
    }
    boost::filesystem::remove_all(dir2);
}