require 'rake'
require 'rake/tasklib'

require 'rbconfig'
require 'fileutils'

#require 'mega/filelist'
require 'reap/projectinfo'

module Reap ; VERSION = 3.01 ; end

module ReapTask
  extend self
end

# Base class for reap tasks.
#
# Here's an oh so simple example:
#
#   class MyTask < Reap::Task
#
#     register 'mytask'
#
#     default_desc 'this is a custom reap task'
#
#     attr_accessor :message
#
#     def init
#       @message ||= master['default'] || 'None Found!'
#     end
#
#     def run
#       puts @message
#     end
#   end
#
# The corresponding settings in the ProjectInfo file will then be:
#
#   default: Default text, if any.
#
#   myname:
#     TASK: mytask
#     message: Message text, if any.
#
module Reap

  #def self.register( name, klass )
  #  @registry ||= {}
  #  @registry[name.to_s.downcase] = klass
  #end

  #def self.registry ; @registry ; end

  class Task < ::Rake::TaskLib

    RUBY = Config::CONFIG['ruby_install_name']

    def self.register( name )
      klass = self.class
      ReapTask.class_eval {
        define_method( "#{name}_task" ) { |*args| klass.new(*args) }
      }
    end

    def master
      ::ProjectInfo.info
    end

    #attr_reader :name, :description, :subtask

    def initialize( task_name=nil, subtask=nil, &yld ) #:yield:
      o = nil
      o = yld.call(self) if yld
      if String === o
        begin
          section( o ).each { |k,v| send("#{k}=", v ) }
        end
      end

      init

      task_name ||= default_name
      task_desc = @desc || default_desc

      if subtask
        desc task_desc
        task task_name => subtask do
          run
        end
      else
        desc task_desc
        task task_name do
          run
        end
      end
    end

    def default_desc ; '(no desciption given)' ; end
    #def default_name ; self.class.basename.downcase ; end

    def init
      raise "not implemented"
    end

    def section( ymlstr )
      iy = YAML::load(ProjectInfo.info_stream + "\ntask:\n" + ymlstr.tabto(2))
      iy['task'] || {}
    end

  end #class Task

end #module Reap


##
# Convenience methods for built-in rake tasks
##
module RakeTask
  extend self

  def gem_package_task(*args,&blk)
    ::Rake::GemPackageTask.new(*args,&blk)
  end

  def package_task(*args,&blk)
    ::Rake::PackageTask.new(*args,&blk)
  end

  def test_task(*args,&blk)
    ::Rake::TestTask.new(*args,&blk)
  end

  def rdoc_task(*args,&blk)
    ::Rake::RDocTask.new(*args,&blk)
  end

end