module Munge
  class Bootstrap
    class << self
      def new_from_dir(root_path:)
        new_from_fs(
          root_path: root_path,
          config_path: config_path(root_path),
          setup_path: setup_path(root_path),
          rules_path: rules_path(root_path)
        )
      end

      def new_from_fs(root_path:,
                      config_path:,
                      setup_path:,
                      rules_path:)
        new(
          root_path: root_path,
          config: read_config(config_path),
          setup_string: File.read(setup_path),
          setup_path: setup_path,
          rules_string: File.read(rules_path),
          rules_path: rules_path
        )
      end

      private

      def read_config(config_path)
        Munge::Util::Config.read(config_path)
      end

      def config_path(root_path)
        File.join(root_path, "config.yml")
      end

      def setup_path(root_path)
        File.join(root_path, "setup.rb")
      end

      def rules_path(root_path)
        File.join(root_path, "rules.rb")
      end
    end

    def initialize(root_path:,
                   config:,
                   setup_string:,
                   rules_string:,
                   setup_path:,
                   rules_path:)
      system = Munge::System.new(root_path, config)

      binding.eval(setup_string, setup_path)

      @app = Munge::Application.new(system)

      binding.eval(rules_string, rules_path)
    end

    attr_reader :app
  end
end