module GitBumper
  # This class receives a Hash of options parsed by CLIParser and executes the
  # requested action.
  class CLI
    # @param [Hash]
    def initialize(options)
      @options = options
    end

    def run
      Git.fetch_tags

      old_tag = greatest_tag
      abort 'No tags found.' unless old_tag

      new_tag = old_tag.clone
      new_tag.increment(@options.fetch(:increment))

      puts "The old tag is      #{old_tag}"
      puts "The new tag will be #{new_tag}"
      puts 'Push to origin? (y/N)'

      abort 'Aborted.' unless prompt_yes

      Git.create_tag(new_tag)
      Git.push_tag(new_tag)
    end

    private

    def prompt_yes
      STDIN.gets.chomp.to_s =~ /y(es)?/i
    end

    def greatest_tag
      Git.greatest_tag(klass: @options.fetch(:klass),
                       prefix: @options.fetch(:prefix))
    end
  end
end