require 'tmpdir'

module Luruju

  class JudeApiLoader
    
    def self.wrap_load_default_option jude_file, options={}
      default = {:copy => :if_locked}
      yield jude_file, default.merge(options)
    end
    
    def self.wrap_load_for_tmpdir jude_file, options={}
      do_jude_file = options[:copy] == :first ? copy_jude_file(jude_file, options) : jude_file
      yield do_jude_file, options
    rescue ProjectLockedException
      raise $! if do_jude_file != jude_file or options[:copy] != :if_locked or options[:retried]
      do_jude_file = copy_jude_file jude_file, options
      load do_jude_file, options.update(:retried => true)
    ensure
      FileUtils.remove_entry(File.dirname(do_jude_file), :force => true) if do_jude_file != jude_file
    end

    @@tmpdir_no = 0
    protected
    def self.copy_jude_file jude_file, options
      @@tmpdir_no += 1
      tmpdir = options[:tmpdir] || Dir.tmpdir
      FileUtils.makedirs(tmpdir) unless FileTest.exist? tmpdir
      current_tmpdir = FileUtils.makedirs File.join(tmpdir,"luruju.#{$$}.#{@@tmpdir_no}")
      copy_jude_file = File.join current_tmpdir, File.basename(jude_file)
      FileUtils.cp jude_file, copy_jude_file
      copy_jude_file
    end
    
  end

end