from abstract_instrument import abstract_instrument
  import socket
  
  #==============================================================================
  
  ALL_VAL_TYPE = ['TEMP', 'RES']
  ALL_CHANNELS = ['a', 'b', 'c', 'd']

  ADDRESS = "192.168.0.12"

  CONF_VAL_TYPE = ['krdg?', 'srdg?']
  
  #==============================================================================
  
  class LS350(abstract_instrument):

      def __init__(self, channels, vtypes, address):
          self.address = address

          self.port = 7777

          self.channels = channels

          self.vtypes = vtypes
  
      def model(self):
          #self.send("*IDN?")
          #return self.read()

          return "LS350"

  
      def connect(self):

          print('Connecting to device @%s:%s...' %(self.address, self.port))

          self.sock = socket.socket(socket.AF_INET,
                               socket.SOCK_STREAM,
                               socket.IPPROTO_TCP)
          self.sock.settimeout(10.0)    # Don't hang around forever

          self.sock.connect((self.address, self.port))

          print('  --> Ok')
          print(self.model())

          self.configure()

  
      def configure(self):

          self.strCh = ''
          for ch in self.channels:
              self.strCh = self.strCh + '%s %s;'%(CONF_VAL_TYPE[ALL_VAL_TYPE.index(self.vtypes[self.channels.index(ch)])], ch)
          self.strCh = self.strCh[0:-1]
          print(self.strCh)

  
      def getValue(self):
          self.send(self.strCh)
          return self.read()
  
      def read(self):
          self.send("++read eoi")
          ans = ''
          nb_data_list = []
          nb_data = ''
          try:
              while ans != '
  ':
                  ans = self.sock.recv(1)
                  nb_data_list.append(ans) # Return the number of data
              list_size = len(nb_data_list)
              for j in range (0, list_size):
                  nb_data = nb_data+nb_data_list[j]
              return nb_data
          except socket.timeout:
              print "Socket timeout error when reading."
              raise
  
      def disconnect(self):
          self.send('MODE0')
          self.sock.close()
  
      def send(self, command):
          self.sock.send("%s
  "%command)