configure

#!/usr/bin/env ruby

module Pod
  class TemplateConfigurator
    attr_reader :plugin_file
    attr_reader :dangerfile_name

    def initialize(dangerfile_name)
      unless dangerfile_name
        puts 'Please specify a plugin name on the command line.'
        exit
      end

      @plugin_file = dangerfile_name.split('-').last
      @dangerfile_name = dangerfile_name
    end

    def run
      puts "Configuring #{dangerfile_name}"
      print_info
      clean_template_files
      replace_variables_in_files
      rename_template_files
      reinitialize_git_repo
      bundle_install
      run_tests
      build_gem
      puts "Done."
    end

    #----------------------------------------#

    def print_info
      puts "user name:#{user_name}"
      puts "user email:#{user_email}"
      puts "year:#{year}"
    end

    def clean_template_files
      `rm -rf configure`
      `rm -rf README.md`
      `rm -rf LICENSE`
    end

    def replace_variables_in_files
      file_names = [
        'GEM_CHANGELOG.md',
        'GEM_CONTRIBUTING.md',
        'GEM_RELEASING.md',
        'GEM_LICENSE.txt',
        'GEM_README.md',
        'Gemfile',
        'GEM.gemspec.template',
        'lib/GEM.rb',
        'lib/GEM/gem_version.rb',
        'spec/GEM_spec.rb'
      ]

      file_names.each do |file_name|
        text = File.read(file_name)
        # dangerfile-no_eggs_please -> DangerNoEggsPlease
        text.gsub!('${GEM_CLASS}', dangerfile_name.split(/\-|_/).map(&:capitalize).join)
        # dangerfile-no_eggs_please -> NoEggsPlease
        text.gsub!('${GEM_MODULE}', "Dangerfile#{dangerfile_name.gsub('dangerfile-', '').split('_').map(&:capitalize).join}")
        # dangerfile-no_eggs_please -> no_eggs_please
        text.gsub!('${GEM_FILE}', plugin_file)
        text.gsub!('${GEM_NAME}', dangerfile_name)
        text.gsub!('${USER_NAME}', user_name)
        text.gsub!('${USER_EMAIL}', user_email)
        text.gsub!('${YEAR}', year)
        File.open(file_name, 'w') { |file| file.puts text }
      end
    end

    def rename_template_files
      `mv GEM_Dangerfile Dangerfile`
      `mv GEM_CHANGELOG.md CHANGELOG.md`
      `mv GEM_CONTRIBUTING.md CONTRIBUTING.md`
      `mv GEM_RELEASING.md RELEASING.md`
      `mv GEM_LICENSE.txt LICENSE.txt`
      `mv GEM_README.md README.md`
      `mv GEM.gemspec.template #{dangerfile_name}.gemspec`
      `mv lib/GEM.rb lib/danger_#{plugin_file}.rb`
      `mv lib/GEM lib/#{plugin_file}`
      `mv spec/GEM_spec.rb spec/#{plugin_file}_spec.rb`
    end

    def reinitialize_git_repo
      `rm -rf .git`
      `git init`
      `git add -A`
      `git commit -m "Initial commit."`
    end

    def bundle_install
      puts 'Running bundle install'
      `bundle install`
    end

    def run_tests
      puts 'Running rake'
      `rake`
    end

    def build_gem
      puts 'Running rake build'
      `rake build`
    end

    #----------------------------------------#

    def user_name
      (ENV['GIT_COMMITTER_NAME'] || `git config user.name`).strip
    end

    def user_email
      (ENV['GIT_COMMITTER_EMAIL'] || `git config user.email`).strip
    end

    def year
      Time.now.year.to_s
    end

    #----------------------------------------#
  end
end

#-----------------------------------------------------------------------------#

# TODO: Handle description
# TODO: Handle usage
# TODO: Handle GitHub URL

dangerfile_name = ARGV.shift
Pod::TemplateConfigurator.new(dangerfile_name).run