#!/usr/bin/env python

import sys
import os
import time

from   multiprocessing.managers import BaseManager

from optparse import OptionParser
import datetime

import numpy as np

import interp.bootstrap
from   interp.grid.gmsh import ggrid
from   interp.tools import baker_exact_3D as exact

from interp.cluster import QueueManager, get_qs

def keep_working(controls):
  pass

def work(inq, outq, g, myname):
  pass


if __name__ == '__main__':
  parser = OptionParser(usage = "usage: %s [options] <server> <gmsh file>")

  parser.add_option("-v", "--verbose",
    action="store_true", dest="verbose", default=False,
    help="verbose flag (display progress bar: %default)")

  parser.add_option('-p', '--port',
    type="int", dest="port", default=6666,
    help="specify the port to use on the server (default: %default)")

  (options, args) = parser.parse_args()

  if len(args) != 2:
    parser.print_usage()
    sys.exit(1)

  server, input_file = args

  m = QueueManager(address=(server, options.port), authkey='asdf')
  m.connect()

  tasksq, resultsq, masterq, slavesq = get_qs(m)

  g = ggrid(input_file)
  g.q = np.array([exact(x) for x in g.verts])

  myname = "%s-%d" % (os.uname()[1], os.getpid())
  if options.verbose:
    print myname


  while True:
    # indicate that I am loaded up, and ready for workload
    masterq.put(myname)
    # wait for master's start signal
    action = slavesq.get()
    if action == "teardown":
      # I take it back; I'm not ready!
      masterq.get()
      break
    elif action == "slay":
      break

    while not tasksq.empty():
      i, o, e, X = tasksq.get()
      try:
        a = g.run_baker(X, order = o, extra_points = e)
        resultsq.put((i, myname, a['qlin'], a['error'], a['final'], exact(X)))
      except Exception as e:
        print X, e
        resultsq.put((i, myname, 0.0, 0.0, 0.0, 0.0))

  if options.verbose:
    print "exiting"