require 'logger'
require 'fileutils'

begin
require 'thin'
rescue LoadError
end

module Rack

  class TryStatic

    def initialize(app, options)
      @app = app
      @try = ['', *options.delete(:try)]
      @static = ::Rack::Static.new(lambda { [404, {}, []] }, options)
    end

    def call(env)
      orig_path = Rack::Utils.unescape env['PATH_INFO']
      found = nil
      @try.each do |path|
        resp = @static.call(env.merge!({'PATH_INFO' => orig_path + path}))
        break if 404 != resp[0] && found = resp
      end
      found or @app.call(env.merge!('PATH_INFO' => orig_path))
    end
  end
end

def start_rack(root, not_found)
  env = nil
  #env = :development

  use Rack::TryStatic, environment: env, :root => root, :urls => %w[/], :try => ['.html', '.shtml', 'index.html', '/index.html']

  Thin::Logging.silent = true
  #Thin::Logging.debug = true

  #use Rack::ContentLength
  #use Rack::Chunked
  #use Rack::ShowExceptions
  #use Rack::Lint
  #file = File.new('log/rack.log', 'a+')
  #file.sync = true
  #use Rack::CommonLogger, file
  #use Rack::CommonLogger

  # Run your own Rack app here or use this one to serve 404 messages:
  run lambda{ |env|
    not_found_page = File.exist?(not_found) ? [File.read(not_found)] : ['404 - page not found']
    [ 404, { 'Content-Type'  => 'text/html' }, not_found_page ]
  }
end

root = ENV['RACK_ROOT'] || 'public'

start_rack root, "#{root}/404.html"