#!/usr/bin/env ruby

=begin rdoc

= rbot main executable

Usage:

  % rbot [options] [config directory]

== Options

[-h, --help]
    display a help message and exit
[-v, --version]
    display version information and exit
[-d, --debug]
    enable debug messages
[-l, --loglevel _level_]
    sets the minimum log level verbosity
[-b, --background]
    background (daemonize) the bot
[-p, --pidfile _filename_]
    write the bot pid to _filename_

The default config directory is <tt>~/.rbot</tt>.

The default pidfile is <tt><i>botdir</i>/rbot.pid</tt>.

The logfile is located at <tt><i>botdir</i>/<i>botname</i>.log</tt>, and
the default loglevel is 1 (INFO messages). Possible values for the loglevel
are 0 (DEBUG), 1 (INFO), 2 (WARN), 3 (ERROR), 4 (FATAL).

Please note that the logfile doesn't contain IRC logs (which are located at
<tt><i>botdir</i>/logs/*</tt>, but only rbot diagnostic messages.

=end

# Copyright (C) 2002-2006 Tom Gilbert.
# Copyright (C) 2007-2008 Giuseppe Bilotta and the rbot development team
#
# This is free software, see COPYING for licensing details

require 'etc'
require 'getoptlong'
require 'fileutils'

$version ||= '0.9.15'
$version_timestamp ||= 0
$opts = Hash.new

orig_opts = ARGV.dup

opts = GetoptLong.new(
  ['--background', '-b', GetoptLong::NO_ARGUMENT],
  ['--debug', '-d', GetoptLong::NO_ARGUMENT],
  ['--help', '-h', GetoptLong::NO_ARGUMENT],
  ['--loglevel', '-l', GetoptLong::REQUIRED_ARGUMENT],
  ['--trace', '-t', GetoptLong::REQUIRED_ARGUMENT],
  ['--pidfile', '-p', GetoptLong::REQUIRED_ARGUMENT],
  ['--version', '-v', GetoptLong::NO_ARGUMENT]
)

$daemonize = false

opts.each do |opt, arg|
  $daemonize = true if opt == '--background'
  $opts[opt.sub(/^-+/, '')] = arg
end

if $opts['trace']
  set_trace_func proc { |event, file, line, id, binding, classname|
    if classname.to_s == $opts['trace']
      printf "TRACE: %8s %s:%-2d %10s %8s\n", event, File.basename(file), line, id, classname
    end
  }
end

defaultlib = File.expand_path("#{File.dirname($PROGRAM_NAME)}/../lib")

if File.directory? "#{defaultlib}/rbot"
  unless $LOAD_PATH.include? defaultlib
    $LOAD_PATH.unshift defaultlib
  end
end

begin
  Encoding.default_internal = Encoding::UTF_8
  Encoding.default_external = Encoding::UTF_8
  require 'rbot/ircbot'
rescue LoadError => e
  puts "Error: couldn't find the rbot/ircbot module (or one of its dependencies)\n"
  puts e
  exit 2
end

if $opts['version']
  puts "rbot #{$version}"
  exit 0
end

if $opts['help']
  puts 'usage: rbot [options] [config directory]'
  puts '  -h, --help         this message'
  puts '  -v, --version      version information'
  puts '  -d, --debug        enable debug messages'
  puts '  -l, --loglevel     sets the log level verbosity'
  puts '  -b, --background   background (daemonize) the bot'
  puts '  -p, --pidfile      write the bot pid to file'
  puts 'config directory defaults to ~/.rbot'
  exit 0
end

# setup logger based on command line arguments
loglevel = $opts['loglevel'] ? $opts['loglevel'].to_i : nil
loglevel = $opts['debug'] ? 0 : loglevel
if loglevel
  Irc::Bot::LoggerManager.instance.set_level(loglevel)
end

if (bot = Irc::Bot.new(ARGV.shift, argv: orig_opts))
  # just run the bot
  bot.mainloop
end

Irc::Bot::LoggerManager.instance.flush
Irc::Bot::LoggerManager.instance.halt_logger
