class Opal::CliRunners::Server

def build_app(source)
  app = App.new(source)
  if static_folder
    not_found = [404, {}, []]
    app = Rack::Cascade.new(
      [
        Rack::Static.new(->(_) { not_found }, urls: [''], root: static_folder),
        app
      ],
    )
  end
  app
end

def exit_status
  nil
end

def initialize(options)
  @output = options.fetch(:output, $stdout)
  @port = options.fetch(:port, ENV['OPAL_CLI_RUNNERS_SERVER_PORT'] || 3000).to_i
  @static_folder = options[:static_folder] || ENV['OPAL_CLI_RUNNERS_SERVER_STATIC_FOLDER']
  @static_folder = @static_folder == true ? 'public' : @static_folder
  @static_folder = File.expand_path(@static_folder) if @static_folder
end

def run(source, argv)
  unless argv.empty?
    raise ArgumentError, 'Program arguments are not supported on the Server runner'
  end
  require 'rack'
  require 'webrick'
  require 'logger'
  app = build_app(source)
  @server = Rack::Server.start(
    app:       app,
    Port:      port,
    AccessLog: [],
    Logger:    Logger.new(output),
  )
end