namespace :nuby do

  typo_graph_dir = File.expand_path("public/images/typo_graphs", RAILS_ROOT)

  desc "Removes files and directories made by these tasks"
  task :clean do
    rm_rf typo_graph_dir
  end

  namespace :graph do 
        
    task :setup => :environment do
      mkdir_p typo_graph_dir
      %w(sparklines gruff).each do |library|
        require File.expand_path("../support/lib/#{library}", File.dirname(__FILE__))
      end
    end
        
    desc "Make a green sparkline graph showing number of comments per article"
    task :comments => :setup do
      articles = Article.find :all, :order => "created_at ASC"
      Sparklines.plot_to_file File.join(typo_graph_dir, "comments_count.png"), 
                              articles.map { |article| article.comments_count}, 
                              :type => 'smooth', 
                              :line_color => 'green',
                              :above_color => "green",
                              :below_color => "green"
    end

    desc "Make a countdown graph for RailsConf 2006"
    task :countdown_railsconf do
      require 'rubygems'
      require 'gruff'
      require 'date'

      g = Gruff::Scene.new('400x60', 'themes/nubyish/images/banner/2006/railsconf/countdown')
      g.layers = %w[background railsconf days]
      g.days = (Date.parse('2006-06-22') - Date.today).to_i
      g.write File.join(typo_graph_dir, "countdown_railsconf.png")
    end
  
  end
end