require 'rbconfig'
require 'fileutils'

require 'facets'      # Next two may be moved in the future to:
require 'command'     #  'console/command'
require 'ansicode'    #  'console/ansicode'
require 'string/tabto'
require 'gem/self/gempath'

require 'reap/reap'

# ReapCommand is the CLI interface to Reap.

class ReapCommand < Console::Command

  INFO_FILES = [ 'ProjectInfo', 'projectinfo' ]

  # Options

  # verbose mode
  def __verbose ; $VERBOSE = true ; end
  alias_method :_V, :__verbose

  # force mode
  def __force ; $FORCE = true ; end
  alias_method :_f, :__force

  # pretend mode (under construction)
  #--
  # A few tasks have some support for pretending
  # but this has to be developed much more
  # before it can be commonly avaialble.
  # Notice it is not mentioned in the Help.
  #++
  def __pretend; $PRETEND = true ; end
  alias_method :_P, :__pretend

  # debug mode (under construction)
  def __debug; $DEBUG = true ; end
  alias_method :_D, :__debug

  def __password( pass ); $PASSWORD =  pass ; end
  alias_method :_p, :__password

  # display reap version
  def __version ; version ; end
  alias_method :_v, :__version

  # option to display help
  def __help ; help ; end
  alias_method :_h, :__help

  # option to display tasks
  def __tasks; tasks ; end
  alias_method :_t, :__tasks
  alias_method :_T, :__tasks

  #option for build version (only for package task)
  def _b ; $BUILD_VERSION = true ; end

  #def _f( pif ) ; $PROJECT_FILE = pif ; end
  #alias_method :_f, :__file

  # Default subcommand is to display tasks.

  def default
    tasks
  end

  # Display version.

  def version
    puts "Reap v#{Reap::Version}"
    exit 0  # shortcuts execution when called via the --version option.
  end

  # Display help.

  def help
    puts HELP
    exit 0 # shortcuts execution when called via the --help option.
  end

  # list available tasks

  def tasks
    # TODO How to deal with windows or other ansi not support?
    hi = Console::ANSICode.bold #+ Console::ANSICode.yellow
    lo = Console::ANSICode.reset #+ Console::ANSICode.blue
    re = Console::ANSICode.reset

    tasklist = TaskSpace.visible_tasks
    if tasklist.empty?
      puts "No tasks available."
    else
      sorted = tasklist.collect{ |e| e.to_s }.sort
      outlist = []
      margin = sorted.collect{ |t| t.size }.max + 2
      sorted.each do |name|
        outlist << hi + " #{name}".ljust(margin) + lo + " #{TaskSpace.instance_task(name).description}" + re
      end
      puts "[from #{Dir.pwd}]"
      #puts
      puts outlist.join("\n")
      #puts
    end
  end

  # Command shows task dependencies.

  def prerequisite
    Reap.tasks.each { |name, t|
      print name
      print " => "
      puts TaskSpace.instance_task(name.to_sym).prerequisite.inspect
    }
  end

  # Define a CLI callable method for each described tasks.
  #
  # NOTE The use of the launcher class seems a touch hackish,
  # and indicates to me that there might be a better
  # way to organize the tasks, but as long as it works!

  launcher = Class.new{ include TaskSpace }.new()

  TaskSpace.visible_tasks.each do |t|
    define_method(t) do |*args|
      launcher.send(t, *args)
    end
  end

  # Help text

  HELP = <<-HERE.tabto(2)

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

    COMMANDS:

      tasks
        List all the current tasks with descriptions.
        (This is the default if no command is given.)

      help [type]
        Displays this help information. If a task type is given, it
        will provide help information specific to that kind of task.

    OPTIONS:

      -h --help      Display this help information.
      -v --version   Display the current version.
      -V --verbose   Provides extra verbose processing information.
      -f --force     Forces certain operations to be performed.
      -D --debug     Provides extra verbose processing information.
      -f --file      Specify alternate project file.

  HERE

#--
#
#   HELP = <<-HERE.tabto(2)
#
#     reap [options...] <command> [arguments...]
#
#     COMMANDS:
#
#       tasks
#         List all the current tasks with descriptions.
#         (This is the default if no command is given.)
#
#       scaffold [type]
#         Generates a project directory layout within the current
#         directory. For more details type 'reap help scaffold'.
#
#       template | projectinfo
#         Create a ProjectInfo template file in the current directory
#         Unlike 'scaffold', this is especially useful for pre-existing
#         projects.
#
#       help [type]
#         Displays this help information. If a task type is given, it
#         will provide help information specific to that kind of task.
#
#     OPTIONS:
#
#       -h --help      Display this help information.
#       -v --version   Display the current version.
#       -V --verbose   Provides extra verbose processing information.
#       -f --force     Forces certain operations to be performed.
#       -D --debug     Provides extra verbose processing information.
#       -f --file      Specify alternate project file.
#
#   HERE
#
#   HELP_SCAFFOLD = <<-HERE.tabto(2)
#
#     reap scaffold [type]
#
#     Generates a project directory layout within the current
#     directory. The scaffolding includes all the standard
#     features such as directories lib/ bin/ doc/ and files
#     like README.
#
#     To use this task you should first create an empty
#     directory and than change into it. This command will
#     not create a new project directory. As a safegaurd, this
#     command will not generate scaffolding in a directory with
#     files already present, unless you use the -f (force) option.
#
#     There are currently two types of supported scaffoldings:
#     'standard', which is the default if no type is given,
#     and 'subversion' which creates a "trunk" hierarchy.
#
#   HERE
#
#   HELP_TEMPLATE = <<-HERE.tabto(2)
#
#     reap template | reap projectinfo
#
#     Create a ProjectInfo template file in the current directory
#     Unlike 'scaffold', this is especially useful for pre-existing
#     projects.
#
#   HERE
#
#++

end