class SurveyorGenerator < Rails::Generator::Base
  def manifest
    record do |m|
      
      m.directory "surveys"
      
      # Copy README to your app
      m.file "../../../README.md", "surveys/README.md"
          
      # Gem plugin rake tasks
      m.file "tasks/surveyor.rb", "lib/tasks/surveyor.rb"
      if file_has_line(destination_path('Rakefile'), /^require 'tasks\/surveyor'$/ )
        logger.skipped 'Rakefile'
      else
        File.open(destination_path('Rakefile'), 'ab') {|file| file.write("\nrequire 'tasks/surveyor'\n") }
        # http://ggr.com/how-to-include-a-gems-rake-tasks-in-your-rails-app.html
        logger.appended 'Rakefile'
      end
                  
      # HAML
      m.file "initializers/surveyor.rb", "config/initializers/surveyor.rb"
      m.file "initializers/haml.rb", "config/initializers/haml.rb"
      
      # Migrate 
      # not using m.migration_template because all migration timestamps end up the same, causing a collision when running rake db:migrate
      # coped functionality from RAILS_GEM_PATH/lib/rails_generator/commands.rb
      m.directory "db/migrate"
      ["surveys", "survey_sections", "questions", "answers", "response_sets", "responses", "dependencies", "question_groups", "dependency_conditions"].each_with_index do |model, i|
        unless (prev_migrations = Dir.glob("db/migrate/[0-9]*_*.rb").grep(/[0-9]+_create_#{model}.rb$/)).empty?
          prev_migration_timestamp = prev_migrations[0].match(/([0-9]+)_create_#{model}.rb$/)[1]
        end
        # raise "Another migration is already named create_#{model}" if not Dir.glob("db/migrate/[0-9]*_*.rb").grep(/[0-9]+_create_#{model}.rb$/).empty?
        m.template("migrate/create_#{model}.rb", "db/migrate/#{(prev_migration_timestamp || Time.now.utc.strftime("%Y%m%d%H%M%S").to_i + i).to_s}_create_#{model}.rb")
      end
      
      # Generate CSS
      css_root = File.join(File.dirname(__FILE__), "templates", "assets", "stylesheets")
      `sass #{css_root}/sass/surveyor.sass #{css_root}/surveyor.css`

      # Assets
      ["images", "javascripts", "stylesheets"].each do |asset_type|
        m.directory "public/#{asset_type}/surveyor"
        Dir.glob(File.join(File.dirname(__FILE__), "templates", "assets", asset_type, "*.*")).map{|path| File.basename(path)}.each do |filename|
          m.file "assets/#{asset_type}/#{filename}", "public/#{asset_type}/surveyor/#{filename}"
        end
      end
      
      # Surveys
      m.directory "surveys/fixtures"
      m.file "surveys/kitchen_sink_survey.rb", "surveys/kitchen_sink_survey.rb"
      
      m.readme "README"
      
    end
  end
  def file_has_line(filename, rxp)
    File.readlines(filename).each{ |line| return true if line =~ rxp }
    false
  end
end