text: /*
   * Copyright (c) 2015-2017 Cryptonomex, Inc., and contributors.
   *
   * The MIT License
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  #include <graphene/app/application.hpp>
  
  #include <graphene/witness/witness.hpp>
  #include <graphene/debug_witness/debug_witness.hpp>
  #include <graphene/account_history/account_history_plugin.hpp>
  #include <graphene/elasticsearch/elasticsearch_plugin.hpp>
  #include <graphene/market_history/market_history_plugin.hpp>
  #include <graphene/delayed_node/delayed_node_plugin.hpp>
  #include <graphene/snapshot/snapshot.hpp>
  #include <graphene/es_objects/es_objects.hpp>
  #include <graphene/grouped_orders/grouped_orders_plugin.hpp>
  
  #include <fc/exception/exception.hpp>
  #include <fc/thread/thread.hpp>
  #include <fc/interprocess/signals.hpp>
  #include <fc/log/console_appender.hpp>
  #include <fc/log/file_appender.hpp>
  #include <fc/log/logger.hpp>
  #include <fc/log/logger_config.hpp>
  
  #include <boost/filesystem.hpp>
  
  #include <boost/property_tree/ptree.hpp>
  #include <boost/property_tree/ini_parser.hpp>
  #include <boost/algorithm/string/predicate.hpp>
  #include <boost/algorithm/string/classification.hpp>
  #include <boost/algorithm/string/split.hpp>
  #include <boost/container/flat_set.hpp>
  
  #include <graphene/utilities/git_revision.hpp>
  #include <boost/version.hpp>
  #include <boost/algorithm/string/replace.hpp>
  #include <websocketpp/version.hpp>
  
  #include <iostream>
  #include <fstream>
  
  #ifdef WIN32
  # include <signal.h> 
  #else
  # include <csignal>
  #endif
  
  using namespace graphene;
  namespace bpo = boost::program_options;
           
  void write_default_logging_config_to_stream(std::ostream& out);
  fc::optional<fc::logging_config> load_logging_config_from_ini_file(const fc::path& config_ini_filename);
  
  class deduplicator 
  {
     public:
        deduplicator() : modifier(nullptr) {}
  
        deduplicator(const boost::shared_ptr<bpo::option_description> (*mod_fn)(const boost::shared_ptr<bpo::option_description>&))
                : modifier(mod_fn) {}
  
        const boost::shared_ptr<bpo::option_description> next(const boost::shared_ptr<bpo::option_description>& o)
        {
           const std::string name = o->long_name();
           if( seen.find( name ) != seen.end() )
              return nullptr;
           seen.insert(name);
           return modifier ? modifier(o) : o;
        }
  
     private:
        boost::container::flat_set<std::string> seen;
        const boost::shared_ptr<bpo::option_description> (*modifier)(const boost::shared_ptr<bpo::option_description>&);
  };
  
  static void load_config_file( const fc::path& config_ini_path, const bpo::options_description& cfg_options,
                                bpo::variables_map& options )
  {
     deduplicator dedup;
     bpo::options_description unique_options("Graphene Witness Node");
     for( const boost::shared_ptr<bpo::option_description> opt : cfg_options.options() )
     {
        const boost::shared_ptr<bpo::option_description> od = dedup.next(opt);
        if( !od ) continue;
        unique_options.add( od );
     }
  
     // get the basic options
     bpo::store(bpo::parse_config_file<char>(config_ini_path.preferred_string().c_str(),
                unique_options, true), options);
  
     // try to get logging options from the config file.
     try
     {
  	  fc::optional<fc::logging_config> logging_config = load_logging_config_from_ini_file(config_ini_path);
        if (logging_config)
           fc::configure_logging(*logging_config);
     }
     catch (const fc::exception&)
     {
        wlog("Error parsing logging config from config file ${config}, using default config", ("config", config_ini_path.preferred_string()));
     }
  }
  
  const boost::shared_ptr<bpo::option_description> new_option_description( const std::string& name, const bpo::value_semantic* value, const std::string& description )
  {
      bpo::options_description helper("");
      helper.add_options()( name.c_str(), value, description.c_str() );
      return helper.options()[0];
  }
  
  static void create_new_config_file( const fc::path& config_ini_path, const fc::path& data_dir,
                                      const bpo::options_description& cfg_options )
  {
     ilog("Writing new config file at ${path}", ("path", config_ini_path));
     if( !fc::exists(data_dir) )
        fc::create_directories(data_dir);
  
     auto modify_option_defaults = [](const boost::shared_ptr<bpo::option_description>& o) -> const boost::shared_ptr<bpo::option_description> {
         const std::string& name = o->long_name();
         if( name == "partial-operations" )
            return new_option_description( name, bpo::value<bool>()->default_value(true), o->description() );
         if( name == "max-ops-per-account" )
            return new_option_description( name, bpo::value<int>()->default_value(1000), o->description() );
         return o;
     };
     deduplicator dedup(modify_option_defaults);
     std::ofstream out_cfg(config_ini_path.preferred_string());
     for( const boost::shared_ptr<bpo::option_description> opt : cfg_options.options() )
     {
        const boost::shared_ptr<bpo::option_description> od = dedup.next(opt);
        if( !od ) continue;
  
        if( !od->description().empty() )
           out_cfg << "# " << od->description() << "\n";
        boost::any store;
        if( !od->semantic()->apply_default(store) )
           out_cfg << "# " << od->long_name() << " = \n";
        else {
           auto example = od->format_parameter();
           if( example.empty() )
              // This is a boolean switch
              out_cfg << od->long_name() << " = " << "false\n";
           else {
              // The string is formatted "arg (=<interesting part>)"
              example.erase(0, 6);
              example.erase(example.length()-1);
              out_cfg << od->long_name() << " = " << example << "\n";
           }
        }
        out_cfg << "\n";
     }
     write_default_logging_config_to_stream(out_cfg);
     out_cfg.close();
     // read the default logging config we just wrote out to the file and start using it
     fc::optional<fc::logging_config> logging_config = load_logging_config_from_ini_file(config_ini_path);
     if (logging_config)
        fc::configure_logging(*logging_config);
  }
  
  int main(int argc, char** argv) {
     app::application* node = new app::application();
     fc::oexception unhandled_exception;
     try {
        bpo::options_description app_options("Graphene Witness Node");
        bpo::options_description cfg_options("Graphene Witness Node");
        app_options.add_options()
              ("help,h", "Print this help message and exit.")
              ("data-dir,d", bpo::value<boost::filesystem::path>()->default_value("witness_node_data_dir"), "Directory containing databases, configuration file, etc.")
              ("version,v", "Display version information")
              ;
  
        bpo::variables_map options;
        auto witness_plug = node->register_plugin<witness_plugin::witness_plugin>();
        auto debug_witness_plug = node->register_plugin<debug_witness_plugin::debug_witness_plugin>();
        auto history_plug = node->register_plugin<account_history::account_history_plugin>();
        auto elasticsearch_plug = node->register_plugin<elasticsearch::elasticsearch_plugin>();
        auto market_history_plug = node->register_plugin<market_history::market_history_plugin>();
        auto delayed_plug = node->register_plugin<delayed_node::delayed_node_plugin>();
        auto snapshot_plug = node->register_plugin<snapshot_plugin::snapshot_plugin>();
        auto es_objects_plug = node->register_plugin<es_objects::es_objects_plugin>();
        auto grouped_orders_plug = node->register_plugin<grouped_orders::grouped_orders_plugin>();
  
        try
        {
           bpo::options_description cli, cfg;
           node->set_program_options(cli, cfg);
           app_options.add(cli);
           cfg_options.add(cfg);
           bpo::store(bpo::parse_command_line(argc, argv, app_options), options);
        }
        catch (const boost::program_options::error& e)
        {
          std::cerr << "Error parsing command line: " << e.what() << "\n";
          return 1;
        }
  
  	  if( options.count("help") )
        {
           std::cout << app_options << "\n";
           return 0;
        }
        if( options.count("version") )
        {
           std::cout << "Version: " << graphene::utilities::git_revision_description << "\n";
           std::cout << "SHA: " << graphene::utilities::git_revision_sha << "\n";
           std::cout << "Timestamp: " << fc::get_approximate_relative_time_string(fc::time_point_sec(graphene::utilities::git_revision_unix_timestamp)) << "\n";
           std::cout << "SSL: " << OPENSSL_VERSION_TEXT << "\n";
           std::cout << "Boost: " << boost::replace_all_copy(std::string(BOOST_LIB_VERSION), "_", ".") << "\n";
           std::cout << "Websocket++: " << websocketpp::major_version << "." << websocketpp::minor_version << "." << websocketpp::patch_version << "\n";
           return 0;
        }
  
  	  fc::path data_dir;
        if( options.count("data-dir") )
        {
           data_dir = options["data-dir"].as<boost::filesystem::path>();
           if( data_dir.is_relative() )
              data_dir = fc::current_path() / data_dir;
        }
  
  	  fc::path config_ini_path = data_dir / "config.ini";
  	  if( !fc::exists(config_ini_path) )
  		 create_new_config_file( config_ini_path, data_dir, cfg_options );
  	  load_config_file( config_ini_path, cfg_options, options );
  
  	  bpo::notify(options);
        node->initialize(data_dir, options);
        node->initialize_plugins( options );
  
  	  node->startup();
        node->startup_plugins();
  
        fc::promise<int>::ptr exit_promise = new fc::promise<int>("UNIX Signal Handler");
  
        fc::set_signal_handler([&exit_promise](int signal) {
           elog( "Caught SIGINT attempting to exit cleanly" );
           exit_promise->set_value(signal);
        }, SIGINT);
  
        fc::set_signal_handler([&exit_promise](int signal) {
           elog( "Caught SIGTERM attempting to exit cleanly" );
           exit_promise->set_value(signal);
        }, SIGTERM);
  
        ilog("Started BitShares node on a chain with ${h} blocks.", ("h", node->chain_database()->head_block_num()));
        ilog("Chain ID is ${id}", ("id", node->chain_database()->get_chain_id()) );
  
        int signal = exit_promise->wait();
        ilog("Exiting from signal ${n}", ("n", signal));
        node->shutdown_plugins();
        node->shutdown();
        delete node;
        return 0;
     } catch( const fc::exception& e ) {
        // deleting the node can yield, so do this outside the exception handler
        unhandled_exception = e;
     }
  
     if (unhandled_exception)
     {
        elog("Exiting with error:\n${e}", ("e", unhandled_exception->to_detail_string()));
        node->shutdown();
        delete node;
        return 1;
     }
  }
  
  // logging config is too complicated to be parsed by boost::program_options, 
  // so we do it by hand
  //
  // Currently, you can only specify the filenames and logging levels, which
  // are all most users would want to change.  At a later time, options can
  // be added to control rotation intervals, compression, and other seldom-
  // used features
  void write_default_logging_config_to_stream(std::ostream& out)
  {
     out << "# declare an appender named \"stderr\" that writes messages to the console\n"
            "[log.console_appender.stderr]\n"
            "stream=std_error\n\n"
            "# declare an appender named \"default\" that writes messages to default.log\n"
            "[log.file_appender.default]\n"
            "# filename can be absolute or relative to this config file\n"
            "filename=logs/default/default.log\n"
            "# Rotate log every ? minutes, if leave out default to 60\n"
            "rotation_interval=60\n"
            "# how long will logs be kept (in days), if leave out default to 1\n"
            "rotation_limit=7\n\n"
            "# declare an appender named \"p2p\" that writes messages to p2p.log\n"
            "[log.file_appender.p2p]\n"
            "# filename can be absolute or relative to this config file\n"
            "filename=logs/p2p/p2p.log\n"
            "# Rotate log every ? minutes, if leave out default to 60\n"
            "rotation_interval=60\n"
            "# how long will logs be kept (in days), if leave out default to 1\n"
            "rotation_limit=7\n\n"
            "# declare an appender named \"rpc\" that writes messages to rpc.log\n"
            "[log.file_appender.rpc]\n"
            "# filename can be absolute or relative to this config file\n"
            "filename=logs/rpc/rpc.log\n"
            "# Rotate log every ? minutes, if leave out default to 60\n"
            "rotation_interval=60\n"
            "# how long will logs be kept (in days), if leave out default to 1\n"
            "rotation_limit=7\n\n"
            "# route any messages logged to the default logger to the \"stderr\" appender and\n"
            "# \"default\" appender we declared above, if they are info level or higher\n"
            "[logger.default]\n"
            "level=info\n"
            "appenders=stderr,default\n\n"
            "# route messages sent to the \"p2p\" logger to the \"p2p\" appender declared above\n"
            "[logger.p2p]\n"
            "level=warn\n"
            "appenders=p2p\n\n"
            "# route messages sent to the \"rpc\" logger to the \"rpc\" appender declared above\n"
            "[logger.rpc]\n"
            "level=error\n"
            "appenders=rpc\n\n";
  }
  
  fc::optional<fc::logging_config> load_logging_config_from_ini_file(const fc::path& config_ini_filename)
  {
     try
     {
        fc::logging_config logging_config;
        bool found_logging_config = false;
  
        boost::property_tree::ptree config_ini_tree;
        boost::property_tree::ini_parser::read_ini(config_ini_filename.preferred_string().c_str(), config_ini_tree);
        for (const auto& section : config_ini_tree)
        {
           const std::string& section_name = section.first;
           const boost::property_tree::ptree& section_tree = section.second;
  
           const std::string console_appender_section_prefix = "log.console_appender.";
           const std::string file_appender_section_prefix = "log.file_appender.";
           const std::string logger_section_prefix = "logger.";
  
           if (boost::starts_with(section_name, console_appender_section_prefix))
           {
              std::string console_appender_name = section_name.substr(console_appender_section_prefix.length());
              std::string stream_name = section_tree.get<std::string>("stream");
  
              // construct a default console appender config here
              // stdout/stderr will be taken from ini file, everything else hard-coded here
              fc::console_appender::config console_appender_config;
              console_appender_config.level_colors.emplace_back(
                 fc::console_appender::level_color(fc::log_level::debug, 
                                                   fc::console_appender::color::green));
              console_appender_config.level_colors.emplace_back(
                 fc::console_appender::level_color(fc::log_level::warn, 
                                                   fc::console_appender::color::brown));
              console_appender_config.level_colors.emplace_back(
                 fc::console_appender::level_color(fc::log_level::error, 
                                                   fc::console_appender::color::cyan));
              console_appender_config.stream = fc::variant(stream_name).as<fc::console_appender::stream::type>(GRAPHENE_MAX_NESTED_OBJECTS);
              logging_config.appenders.push_back(fc::appender_config(console_appender_name, "console", fc::variant(console_appender_config, GRAPHENE_MAX_NESTED_OBJECTS)));
              found_logging_config = true;
           }
           else if (boost::starts_with(section_name, file_appender_section_prefix))
           {
              std::string file_appender_name = section_name.substr(file_appender_section_prefix.length());
              fc::path file_name = section_tree.get<std::string>("filename");
              if (file_name.is_relative())
                 file_name = fc::absolute(config_ini_filename).parent_path() / file_name;
  
              int interval = section_tree.get_optional<int>("rotation_interval").get_value_or(60);
              int limit = section_tree.get_optional<int>("rotation_limit").get_value_or(1);
  
              // construct a default file appender config here
              // filename will be taken from ini file, everything else hard-coded here
              fc::file_appender::config file_appender_config;
              file_appender_config.filename = file_name;
              file_appender_config.flush = true;
              file_appender_config.rotate = true;
              file_appender_config.rotation_interval = fc::minutes(interval);
              file_appender_config.rotation_limit = fc::days(limit);
              logging_config.appenders.push_back(fc::appender_config(file_appender_name, "file", fc::variant(file_appender_config, GRAPHENE_MAX_NESTED_OBJECTS)));
              found_logging_config = true;
           }
           else if (boost::starts_with(section_name, logger_section_prefix))
           {
              std::string logger_name = section_name.substr(logger_section_prefix.length());
              std::string level_string = section_tree.get<std::string>("level");
              std::string appenders_string = section_tree.get<std::string>("appenders");
              fc::logger_config logger_config(logger_name);
              logger_config.level = fc::variant(level_string).as<fc::log_level>(5);
              boost::split(logger_config.appenders, appenders_string, 
                           boost::is_any_of(" ,"), 
                           boost::token_compress_on);
              logging_config.loggers.push_back(logger_config);
              found_logging_config = true;
           }
        }
        if (found_logging_config)
           return logging_config;
        else
           return fc::optional<fc::logging_config>();
     }
     FC_RETHROW_EXCEPTIONS(warn, "")
  }
  