module Sapos
  module Print
    class Printer
      
      
      def initialize(config)
        @config = config
      end
      
      def print(args = {})
        raw_message = args[:document]
      
        log_text = "id=#{args[:id]},doc=#{args[:document_number]},control=#{args[:print_control] ? "SI" : "NO"},cache=0\t"
        filename = "#{args[:document_number]}.print" if args[:document_number]
        filename = SecureRandom.hex if filename.nil?
        result = false
        raw = raw_message.force_encoding("UTF-8")
        msgid = args[:id]
        if @config.duplicate_control? && @config.cache.include?(msgid)
          log_text += " => DUPLICADO (DC)"
          log_text.gsub!("cache=0", "cache=#{@config.cache.size}")
          puts log_text
          return true
        end
        begin
          if args[:print_control] && args[:document_number]
            print_dir = File.join(Sapos::Print.app_directory, 'print')
            FileUtils.mkdir_p print_dir unless File.exists?(print_dir)
            
            filename = File.join(print_dir, filename)
            if !File.exists?(filename)
              printable = data(raw_message)
              File.open(filename, 'w'){|f| f.write(printable)}
              result  = send_to_printer({file: filename})
              #puts "Result: #{result}"
              log_text += " => OK"
            else
              result = true
              log_text += " => DUPLICADO"
            end
          else
            printable = data(raw_message)
            File.open(filename, 'w'){|f| f.write(printable)}
            result  = send_to_printer({file: filename})
            File.delete(filename) if File.exists?(filename)
            #puts "Result: #{result}"
            log_text += " => OK"
          end
          if @config.duplicate_control?
            @config.cache << msgid
            @config.cache.shift if @config.cache.size > 30
            log_text.gsub!("cache=0", "cache=#{@config.cache.size}")
          end
          puts log_text
        rescue => e
          puts "#{e.message}"
          self.errors = e.message
          result = false
        ensure
          #File.delete(filename) if File.exists?(filename)
          return result
        end
      end
      
      def data(raw_message)
        case @config.interface
        when 'text'
          return raw_message
        when 'escp'
          esc = "\x1B" #ESC byte in hex notation
          newLine = "\x0A" #LF byte in hex notation
          cmds  = esc + "@"
          cmds += esc + "!"+"\00"
          cmds += raw_message
          cmds += newLine + newLine
          cmds += "\x1D\x56\x42\x03" # Cut Paper
          cmds += "\x1B\x70\x00\x19\xFA" # Open drawer
          return cmds
        else
          raise "Unknown interface: #{@config.interface}"
        end
      end
      
      def send_to_printer(opts = {})
        case @config.adapter
        when 'console'
          puts "=> CONSOLE: file: #{opts[:file]}<=\n\n"
          puts File.read(opts[:file])
          puts "\n=> END CONSOLE =<"
          return true
        when 'cups'
          file = opts.delete(:file)
          command_options = []
          command_options << "-d #{@printer_name}"
          command_options << "-o raw" if opts[:raw].present?
          command = "lp #{command_options.join(" ")} #{file}"
          puts "CMD => #{command}" if @config.verbose
          if !system(command)
            puts "Not executed"
            return false
          end
          return true
          
        when 'windows'
          #command = "copy" + ' "' + filename + '" ' + '"\\\\%COMPUTERNAME%\\'+"TM"
          filename = opts[:file].to_s.gsub("/","\\")
          command = "COPY " + '"' + filename + '" ' + '"\\\\%COMPUTERNAME%\\' + @config.printer
          #command = "copy #{opts[:file]} "+'"\\\\%COMPUTERNAME%\\'+@config.printer
          if !system(command)
            puts "Not executed"
            return false
          end
          return true
          
        end
      end
      
    end
  end
end