// 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 <ctype.h>

#include <stdint.h>

#include <cerrno>

#include <cstdlib>

#include <cstring>

#include <iomanip>

#include <iostream>

#include <mutex>

#include <string>

#include <vector>

#include "common/config.h"

#include "common/logging.h"

namespace doris {

static bool logging_initialized = false;

static std::mutex logging_mutex;

static bool iequals(const std::string& a, const std::string& b) {

    unsigned int sz = a.size();

    if (b.size() != sz) {

        return false;

    }

    for (unsigned int i = 0; i < sz; ++i) {

        if (tolower(a[i]) != tolower(b[i])) {

            return false;

        }

    }

    return true;

}

// if custom_date_time_format = false, same format as in be.log

// The following is same as default log format. eg:

// I20240605 15:25:15.677153 1763151 wal_manager.cpp:481] msg...

template <bool add_runtime_logger_prefix = false, bool custom_date_time_format = false>

void custom_prefix(std::ostream& s, const google::LogMessageInfo& l, void* arg) {

    if constexpr (add_runtime_logger_prefix) {

        // Add prefix "RuntimeLogger ".

        s << "RuntimeLogger ";

    }

    s << l.severity[0];

    // Add a space if custom_date_time_format.

    if constexpr (custom_date_time_format) {

        s << ' ';

    }

    std::tm tm_time = {};

    tm_time.tm_year = l.time.year();

    tm_time.tm_mon = l.time.month();

    tm_time.tm_mday = l.time.day();

    tm_time.tm_hour = l.time.hour();

    tm_time.tm_min = l.time.min();

    tm_time.tm_sec = l.time.sec();

    if constexpr (custom_date_time_format) {

        s << std::put_time(&tm_time, config::sys_log_custom_date_time_format.c_str());

        if (!config::sys_log_custom_date_time_ms_format.empty()) {

            s << fmt::format(config::sys_log_custom_date_time_ms_format, l.time.usec() / 1000);

        }

    } else {

        s << std::put_time(&tm_time, "%Y%m%d %H:%M:%S");

        s << "." << std::setw(6) << l.time.usec();

    }

    s << ' ';

    s << std::setfill(' ') << std::setw(5);

    s << l.thread_id << std::setfill('0');

    s << ' ';

    s << l.filename << ':' << l.line_number << "]";

}

Unexecuted instantiation: _ZN5doris13custom_prefixILb1ELb1EEEvRSoRKN6google14LogMessageInfoEPv

Unexecuted instantiation: _ZN5doris13custom_prefixILb1ELb0EEEvRSoRKN6google14LogMessageInfoEPv

Unexecuted instantiation: _ZN5doris13custom_prefixILb0ELb1EEEvRSoRKN6google14LogMessageInfoEPv

bool init_glog(const char* basename) {

    std::lock_guard<std::mutex> logging_lock(logging_mutex);

    if (logging_initialized) {

        return true;

    }

    bool log_to_console = (getenv("DORIS_LOG_TO_STDERR") != nullptr);

    if (log_to_console) {

        if (config::enable_file_logger) {

            FLAGS_alsologtostderr = true;

        } else {

            FLAGS_logtostderr = true;

        }

    }

    // don't log to stderr except fatal level

    // so fatal log can output to be.out .

    FLAGS_stderrthreshold = google::FATAL;

    // set glog log dir

    // ATTN: sys_log_dir is deprecated, this is just for compatibility

    std::string log_dir = config::sys_log_dir;

    if (log_dir == "") {

        log_dir = getenv("LOG_DIR");

    }

    FLAGS_log_dir = log_dir;

    // 0 means buffer INFO only

    FLAGS_logbuflevel = 0;

    // buffer log messages for at most this many seconds

    FLAGS_logbufsecs = 30;

    // set roll num

    FLAGS_log_filenum_quota = config::sys_log_roll_num;

    // set log level

    std::string& loglevel = config::sys_log_level;

    if (iequals(loglevel, "INFO")) {

        FLAGS_minloglevel = 0;

    } else if (iequals(loglevel, "WARNING")) {

        FLAGS_minloglevel = 1;

    } else if (iequals(loglevel, "ERROR")) {

        FLAGS_minloglevel = 2;

    } else if (iequals(loglevel, "FATAL")) {

        FLAGS_minloglevel = 3;

    } else {

        std::cerr << "sys_log_level needs to be INFO, WARNING, ERROR, FATAL" << std::endl;

        return false;

    }

    // set log buffer level

    // default is 0

    std::string& logbuflevel = config::log_buffer_level;

    if (iequals(logbuflevel, "-1")) {

        FLAGS_logbuflevel = -1;

    } else if (iequals(logbuflevel, "0")) {

        FLAGS_logbuflevel = 0;

    }

    // set log roll mode

    std::string& rollmode = config::sys_log_roll_mode;

    std::string sizeflag = "SIZE-MB-";

    bool ok = false;

    if (rollmode.compare("TIME-DAY") == 0) {

        FLAGS_log_split_method = "day";

        ok = true;

    } else if (rollmode.compare("TIME-HOUR") == 0) {

        FLAGS_log_split_method = "hour";

        ok = true;

    } else if (rollmode.substr(0, sizeflag.length()).compare(sizeflag) == 0) {

        FLAGS_log_split_method = "size";

        std::string sizestr = rollmode.substr(sizeflag.size(), rollmode.size() - sizeflag.size());

        if (sizestr.size() != 0) {

            char* end = nullptr;

            errno = 0;

            const char* sizecstr = sizestr.c_str();

            int64_t ret64 = strtoll(sizecstr, &end, 10);

            if ((errno == 0) && (end == sizecstr + strlen(sizecstr))) {

                int32_t retval = static_cast<int32_t>(ret64);

                if (retval == ret64) {

                    FLAGS_max_log_size = retval;

                    ok = true;

                }

            }

        }

    } else {

        ok = false;

    }

    if (!ok) {

        std::cerr << "sys_log_roll_mode needs to be TIME-DAY, TIME-HOUR, SIZE-MB-nnn" << std::endl;

        return false;

    }

    // set verbose modules.

    FLAGS_v = config::sys_log_verbose_flags_v;

    std::vector<std::string>& verbose_modules = config::sys_log_verbose_modules;

    int32_t vlog_level = config::sys_log_verbose_level;

    for (size_t i = 0; i < verbose_modules.size(); i++) {

        if (verbose_modules[i].size() != 0) {

            google::SetVLOGLevel(verbose_modules[i].c_str(), vlog_level);

        }

    }

    if (log_to_console) {

        // Add prefix if log output to stderr

        if (config::sys_log_enable_custom_date_time_format) {

            google::InitGoogleLogging(basename, &custom_prefix<true, true>);

        } else {

            google::InitGoogleLogging(basename, &custom_prefix<true, false>);

        }

    } else {

        if (config::sys_log_enable_custom_date_time_format) {

            google::InitGoogleLogging(basename, &custom_prefix<false, true>);

        } else {

            google::InitGoogleLogging(basename);

        }

    }

    logging_initialized = true;

    return true;

}

void shutdown_logging() {

    std::lock_guard<std::mutex> logging_lock(logging_mutex);

    google::ShutdownGoogleLogging();

}

void update_logging(const std::string& name, const std::string& value) {

    if ("sys_log_level" == name) {

        if (iequals(value, "INFO")) {

            FLAGS_minloglevel = 0;

        } else if (iequals(value, "WARNING")) {

            FLAGS_minloglevel = 1;

        } else if (iequals(value, "ERROR")) {

            FLAGS_minloglevel = 2;

        } else if (iequals(value, "FATAL")) {

            FLAGS_minloglevel = 3;

        } else {

            LOG(WARNING) << "update sys_log_level failed, need to be INFO, WARNING, ERROR, FATAL";

        }

    }

}

} // namespace doris