module Padrino
  module Generators
    ##
    # Responsible for generating migration files for the appropriate ORM component.
    #
    class Migration < Thor::Group
      Padrino::Generators.add_generator(:migration, self)

      def self.source_root; __dir__; end
      def self.banner; 'padrino-gen migration [name] [fields]'; end

      include Thor::Actions
      include Padrino::Generators::Actions
      include Padrino::Generators::Components::Actions

      desc "Description:\n\n\tpadrino-gen migration generates a new migration file"

      argument :name, desc: 'The name of your padrino migration'
      argument :columns, desc: 'The columns for the migration', type: :array, default: []
      class_option :root, desc: 'The root destination', aliases: '-r', default: '.', type: :string
      class_option :destroy, aliases: '-d', default: false, type: :boolean

      # Show help if no ARGV given.
      require_arguments!

      # Creates the migration file within a Padrino project.
      def create_migration
        validate_namespace name
        self.destination_root = options[:root]
        if in_app_root?
          self.behavior = :revoke if options[:destroy]
          if include_component_module_for(:orm)
            create_migration_file(name, name, columns)
          else
            say '<= You need an ORM adapter for run this generator. Sorry!'
            raise SystemExit
          end
        else
          say 'You are not at the root of a Padrino application! (config/boot.rb not found)'
        end
      end
    end
  end
end
