module Cucumber

  # Generates generic file structure for a cucumber project
  class ProjectInitializer
    def run
      # normal cucumber init, replacing /features for /goals
      create_directory('goals')
      create_directory('goals/step_definitions')
      create_directory('goals/support')
      create_file('goals/support/env.rb')

      # extra mobiusloop initiialization
      copy_step_defs('mobius_steps.rb', 'goals/step_definitions') # install mobius_steps.rb step definition
      copy_gherkin_languages('gherkin-languages.json')    # copy modified gherkin-languages.json file to gherkin gem(s)
      copy_example_file('total_articles_scale.rb', 'goals/step_definitions')
      copy_example_file('total_readers_scale.rb', 'goals/step_definitions')
      copy_example_file('increase_readers.goal', 'goals')
    end

    private

    def copy_step_defs(spec_file, target)
      gem_dir = `gem environment gemdir`
      steps_file = gem_dir.gsub("\n","") + "/gems/mobiusloop-?.?.?/lib/mobiusloop/" + spec_file
      report_copying(spec_file, target)
      copy_file(steps_file, target)
    end

    def copy_gherkin_languages(gherkin_file)
      gem_dir = `gem environment gemdir`
      source_gherkin = gem_dir.gsub("\n","") + "/gems/mobiusloop-?.?.?/" + gherkin_file
      target_gherkin = gem_dir.gsub("\n","") + "/gems/gherkin-?.?.?/lib/gherkin/"
      report_copying(gherkin_file, target_gherkin)
      copy_file(source_gherkin, target_gherkin)
    end

    def copy_example_file(file, target)
      gem_dir = `gem environment gemdir`
      steps_file = gem_dir.gsub("\n","") + "/gems/mobiusloop-?.?.?/examples/mobiusloop/" + file
      report_copying(file, target)
      copy_file(steps_file, target)
    end

    # TODO: Fix this to work with Windows. FileUtils does not parse ? in file path like Unix
    def copy_file(source, target)
      `cp -rf #{source} #{target}`
    end

    def create_directory(dir_name)
      create_directory_or_file dir_name, true
    end

    def create_file(file_name)
      create_directory_or_file file_name, false
    end

    def create_directory_or_file(file_name, directory)
      file_type = if directory
                    :mkdir_p
                  else
                    :touch
                  end

      report_exists(file_name) || return if File.exists?(file_name)

      report_creating(file_name)
      FileUtils.send file_type, file_name
    end

    def report_exists(file)
      puts "   exist   #{file}"
    end

    def report_creating(file)
      puts "  create   #{file}"
    end

    def report_copying(source, target)
      puts "  copy     #{source} => #{target}"
    end
  end
end