class Template
  DEFAULT_TIMEOUT = 10

  def initialize(input, io: StringIO.new, timeout: DEFAULT_TIMEOUT)
    @input = input
    @parsed =
      Timeout.timeout(timeout) do
        ::Template::Parser::Template.new.parse(@input)
      end
    @io = io
    @timeout = timeout || DEFAULT_TIMEOUT
  end

  def self.render(input, context = "", io: StringIO.new, timeout: DEFAULT_TIMEOUT)
    new(input, io: io, timeout: timeout).render(context)
  end

  def render(context = "")
    Timeout.timeout(timeout) do
      if context.present?
        context = ::Code.evaluate(context, timeout: timeout)
      else
        context = ::Code::Object::Dictionnary.new
      end

      ::Template::Node::Template.new(parsed).evaluate(
        context: context,
        io: io,
      )

      io.is_a?(StringIO) ? io.string : nil
    end
  end

  private

  attr_reader :parsed, :io, :timeout
end

require_relative "template/version"