#!/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 {|opt, arg|
  $daemonize = true if(opt == "--background")
  $opts[opt.sub(/^-+/, "")] = arg
}

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($0) + '/../lib')

if File.directory? "#{defaultlib}/rbot"
  unless $:.include? defaultlib
    $:.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