#include "test_boost_log.hpp"

#include <cassert>

#include <iostream>

#include <fstream>

#include <boost/shared_ptr.hpp>

#include <boost/log/common.hpp>

#include <boost/log/filters.hpp>

#include <boost/log/formatters.hpp>

#include <boost/log/attributes.hpp>

#include <boost/log/sinks.hpp>

#include <boost/log/utility/empty_deleter.hpp>

#include <boost/log/utility/scoped_attribute.hpp>

namespace logging = boost::log;

namespace fmt = boost::log::formatters;

namespace flt = boost::log::filters;

namespace sinks = boost::log::sinks;

namespace attrs = boost::log::attributes;

namespace src = boost::log::sources;

namespace keywords = boost::log::keywords;

using boost::shared_ptr;

// Here we define our application severity levels.

enum severity_level

    normal,

    notification,

    warning,

    error,

    critical

};

// The formatting logic for the severity level

template< typename CharT, typename TraitsT >

inline std::basic_ostream< CharT, TraitsT >& operator<< (

    std::basic_ostream< CharT, TraitsT >& strm, severity_level lvl)

    static const char* const str[] =

        "normal",

        "notification",

        "warning",

        "error",

        "critical"

};

    if (static_cast< std::size_t >(lvl) < (sizeof(str) / sizeof(*str)))

        strm << str[lvl];

    else

        strm << static_cast< int >(lvl);

    return strm;

int foo(src::logger& lg)

    BOOST_LOG_FUNCTION();

    BOOST_LOG(lg) << "foo is being called";

    return 10;

test_boost_log::test_boost_log()

    // For now we only create a text output sink:

    typedef sinks::synchronous_sink< sinks::text_ostream_backend > text_sink;

    shared_ptr< text_sink > pSink(new text_sink);

        text_sink::locked_backend_ptr pBackend = pSink->locked_backend();

        shared_ptr< std::ostream > pStream(&std::clog, logging::empty_deleter());

        pBackend->add_stream(pStream);

        shared_ptr< std::ofstream > pStream2(new std::ofstream("sample.log"));

        assert(pStream2->is_open());

        pBackend->add_stream(pStream2);

    logging::core::get()->add_sink(pSink);

    src::logger lg;

    BOOST_LOG(lg) << "Hello, World!";

    pSink->locked_backend()->set_formatter(fmt::stream

        << fmt::attr("LineID") // First an attribute "LineID" is written to the log

        << " [" << fmt::date_time< boost::posix_time::ptime >("TimeStamp", "%d.%m.%Y %H:%M:%S.%f")

        << "] [" << fmt::attr< severity_level >("Severity", std::nothrow)

        << "] [" << fmt::time_duration< boost::posix_time::time_duration >("Uptime")

        << "] [" // then this delimiter separates it from the rest of the line

        << fmt::if_(flt::has_attr("Tag"))

               fmt::stream << fmt::attr< std::string >("Tag")

                << "] [" // yet another delimiter

        << fmt::named_scope("Scope", keywords::iteration = fmt::reverse) << "] "

        << fmt::message()); // here goes the log record text

    shared_ptr< logging::attribute > pCounter(new attrs::counter< unsigned int >(1));

    // Since we intend to count all logging records ever made by the application,

    // this attribute should clearly be global.

    logging::core::get()->add_global_attribute("LineID", pCounter);

    // And similarly add a time stamp

    shared_ptr< logging::attribute > pTimeStamp(new attrs::local_clock());

    logging::core::get()->add_global_attribute("TimeStamp", pTimeStamp);

    // And an up time stopwatch

    BOOST_LOG_SCOPED_THREAD_ATTR("Uptime", attrs::timer);

    // Let's also track the execution scope from which the records are made

    boost::shared_ptr< logging::attribute > pNamedScope(new attrs::named_scope());

    logging::core::get()->add_thread_attribute("Scope", pNamedScope);

    // We can mark the current execution scope now - it's the 'main' function

    BOOST_LOG_FUNCTION();

    // Let's try out the counter attribute and formatting

    BOOST_LOG(lg) << "Some log line with a counter";

    BOOST_LOG(lg) << "Another log line with the counter";

        BOOST_LOG_NAMED_SCOPE("Tagging scope");

        // Now these lines will be highlighted with the tag

        BOOST_LOG(lg) << "Some tagged log line";

        BOOST_LOG(lg) << "Another tagged log line";

    // And this line is not highlighted anymore

    BOOST_LOG(lg) << "Now the tag is removed";

    pSink->set_filter(

        flt::attr< severity_level >("Severity", std::nothrow) >= warning // Write all records with "warning" severity or higher

        || flt::attr< std::string >("Tag", std::nothrow).begins_with("IMPORTANT")); // ...or specifically tagged

    src::severity_logger< severity_level > slg;

    // These two lines test filtering based on severity

    BOOST_LOG_SEV(slg, normal) << "A normal severity message, will not pass to the output";

    BOOST_LOG_SEV(slg, error) << "An error severity message, will pass to the output";

        // Next we try if the second condition of the filter works

        // We mark following lines with a tag

        BOOST_LOG_SCOPED_THREAD_TAG("Tag", std::string, "IMPORTANT MESSAGES");

        BOOST_LOG(slg) << "Some really urgent line";

    pSink->reset_filter();

    // And moreover, it is possible to nest logging records. For example, this will

    // be processed in the order of evaluation:

    BOOST_LOG(lg) << "The result of foo is " << foo(lg);