#!/usr/bin/env ruby

require 'getoptlong'
require 'rbconfig'
require 'reap/tasks'

HELP1 = <<-HERE

  reap v#{::Reap::VERSION}

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

  COMMANDS:

    help
        Displays this help information.

    template
        Copies the ProjectInfo template into the current
        directory, if it doesn't already exist.

HERE

HELP2 = <<-HERE
  OPTIONS:

    -v  --verbose
        Provides extra verbose processing information.

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

    -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


module Commands
  extend self

  DATA_DIR = 'site_ruby/reap'
  FILE_NAME = 'ProjectInfo'

  def version
    puts "%.2f" % [ Reap::Version ]
  end

  def help
    puts HELP1

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

    puts HELP2
  end

  def tasks
    puts
    #Reap::Task.registry.each do |t|
    #  puts "  #{t.task_name}".ljust(20) + "#{t.task_desc}"
    #end
    puts
  end

  def template( file_name = ProjectInfo )
    #dir = File.dirname(File.dirname(__FILE__))
    dir = File.join( ::Config::CONFIG['datadir'], DATA_DIR )

    tmpf = File.join( dir, 'template.yaml' )
    unless File.file?( tmpf )
      puts tmpf
      raise "Tempfile is missing."
    end

    if File.directory?(filename)
      puts "#{filename} a directory. Cannot comply."
      return
    elsif File.file?(filename)
      puts "#{filename} already exists."
      return
    end
    # copy tmpf to Reapfile
    FileUtils.cp( tmpf, filename )
    puts "#{filename} created. You'll need to fill it out."
  end

end


# main

cmd = nil

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 ]
)

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

cmd = cmd.downcase if cmd

case cmd
when nil,'help'
  Commands.help
  exit 0
when 'tasks'
  Commands.tasks
  exit 0
when 'version'
  Commands.version
  exit 0
when 'template'
  Commands.template
end

# Quick-build and run a task.

c = cmd.downcase.to_s
if ReapTask.respond_to?( "#{c}_task" )
  rt = ReapTask.send("#{c}_task") { ARGV.slice(1..-1).join(' ') }
  rt.run
else
 puts "Unknown command. Try 'reap help' for assitance."
 exit 0
end