#!/usr/bin/env ruby

require 'getoptlong'
require 'reap/reap'

# dislpay the help information
def show_help
  
  puts <<-HERE

reap v#{Reap::VERSION}

  USAGE: reap [options...] <command> [arguments...]

  COMMANDS:
    
    help
        Displays this help information.

HERE

  Reap::Task.registry.each do |t|
    puts "    #{t.task}"
    puts "        #{t.desc}\n\n"
  end

  puts <<-HERE

  OPTIONS:

    -v  --verbose
        Provides extra verbose processing information.

    -u  --use <file>
        Use the specified configuration file rather than
        the default 'Reapfile'.

    -p  --pretend  (NOT YET IMPLEMENTED)
        Pretend, just to see what would happen, but don't
        actually do anything.

    --version
       Display the current version.

    --help
        Display this help information.            

HERE
  
end

# START OF EXECUTION

opts = GetoptLong.new(    
  [ "-v", "--verbose", GetoptLong::NO_ARGUMENT ],
  [ "-p", "--pretend", GetoptLong::NO_ARGUMENT ],
  [ "-d", "--debug", GetoptLong::NO_ARGUMENT ],
  [ "-u", "--use", GetoptLong::REQUIRED_ARGUMENT ],
  [ "--version", GetoptLong::NO_ARGUMENT ],
  [ "--help", GetoptLong::NO_ARGUMENT ]
)

cmd = ARGV[0]
args = ARGV[1..-1]
config = nil

opts.each do |o, a|
  case o
    when '-v'
      $VERBOSE = true
    when '-p'
      $PRETEND = true
    when '-u'
      config = a
    when '-d'
      $DEBUG = true
    when '--help'
      cmd = 'help'
    when '--version'
      cmd = 'version'
  end
end

cmd = cmd.downcase if cmd
if cmd == nil or cmd == 'help'
  show_help
  exit 0
end
if cmd == 'version'
  puts Reap::VERSION
  exit 0
end

runner = Reap::Runner.new( config )
if runner.task?( cmd.downcase.to_sym )
  cmd = cmd.to_s.downcase.to_sym
  runner.call( cmd, *args )
else
  puts "Unknown command. Try 'reap help' for assitance."
  exit 0
end