module ActiveAdmin
  module Generators
    class Boilerplate
      def initialize(class_name)
        @class_name = class_name
      end

      def attributes
        @class_name.constantize.new.attributes.keys
      end

      def rows
        attributes.map { |a| row(a) }.join("\n")
      end

      def row(name)
        "#   row :#{name.gsub(/_id$/, '')}"
      end

      def columns
        attributes.map { |a| column(a) }.join("\n")
      end

      def column(name)
        "#   column :#{name.gsub(/_id$/, '')}"
      end

      def filters
        attributes.map { |a| filter(a) }.join("\n")
      end

      def filter(name)
        "# filter :#{name.gsub(/_id$/, '')}"
      end

      def form_inputs
        attributes.reject { |a| %w(id created_at updated_at).include? a }.map { |a| form_input(a) }.join("\n")
      end

      def form_input(name)
        "#     f.input :#{name.gsub(/_id$/, '')}"
      end
    end
  end
end