module Speedo
  module Generators
    class InstallGenerator < Rails::Generators::Base
      source_root File.expand_path("../../../../", __FILE__)

      desc "Installs Speedo files to get you going fast."
      
      # app/views/layouts/application.html.haml
      def layout
        if yes? "Do you want to replace the application layout? [yN]"
          template 'app/views/layouts/speedo/application.html.haml', 
                   'app/views/layouts/application.html.haml'
          remove_file 'app/views/layouts/application.html.erb'
        end
      end

      # app/assets/stylesheets/speedo.css.scss
      def copy_stylesheet
        template 'app/assets/stylesheets/speedo.css.scss', 
                 'app/assets/stylesheets/speedo.css.scss'
      end

      def alter_application_css
        if_file 'app/assets/stylesheets/application.css' do |path|
          unless File.read(path).match /require speedo/
            inject_into_file path, after: '*= require_self' do
              "\n *= require speedo"
            end
          end
        end
      end

      # app/assets/javascripts/swim.js.coffee
      def javascript
        template 'app/assets/javascripts/swim.js.coffee', 
                 'app/assets/javascripts/swim.js.coffee'
      end

      def alter_application_js
        if_file 'app/assets/javascripts/application.js' do |path|
          unless File.read(path).match /require speedo/
            inject_into_file path, before: '//= require_tree .' do
              "//= require speedo\n"
            end
          end
        end
      end
      
      # config/locales/speedo.en.yml
      def locales
        template 'config/locales/speedo.en.yml', 
                 'config/locales/speedo.en.yml'
      end

      def routes
        route 'mount Speedo::Engine => "/speedo"'
      end

      private

      def if_file path
        if File.exist? path
          yield path
        else
          say "#{path} not found. Please manually require speedo."
        end
      end

    end
  end
end