# frozen_string_literal: true

require "rack/session/cookie"
require_relative "utils"

class Tynn
  module Session
    SECRET_MIN_LENGTH = 30

    def self.setup(app, options = {})
      secret = options[:secret]

      if secret.nil?
        Tynn::Utils.raise_error("Secret key is required", ArgumentError)
      end

      if secret.length < SECRET_MIN_LENGTH
        Tynn::Utils.raise_error(
          "Secret key is shorter than #{ SECRET_MIN_LENGTH } characters",
          ArgumentError
        )
      end

      app.use(Rack::Session::Cookie, {
        coder: Rack::Session::Cookie::Base64::JSON.new,
        hmac: OpenSSL::Digest::SHA256,
        same_site: :Lax
      }.merge(options))
    end

    module InstanceMethods
      def session
        req.session
      end
    end
  end
end