#!/usr/bin/env python

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#

from __future__ import division
import time
import socket
import subprocess
import sys
import os
import signal
import json
from optparse import OptionParser

parser = OptionParser()
parser.add_option("--port", type="int", dest="port", default=9090,
    help="port number for server to listen on")
parser.add_option('-v', '--verbose', action="store_const",
    dest="verbose", const=2,
    help="verbose output")
parser.add_option('-q', '--quiet', action="store_const",
    dest="verbose", const=0,
    help="minimal output")
parser.set_defaults(verbose=1)
options, args = parser.parse_args()

def relfile(fname):
    return os.path.join(os.path.dirname(__file__), fname)

def runServiceTest(server_executable, server_extra_args, client_executable, client_extra_args, protocol, transport, port, use_zlib, use_ssl):
  # Build command line arguments
  server_args = [relfile(server_executable)]
  cli_args = [relfile(client_executable)]
  for which in (server_args, cli_args):
    which.append('--protocol=%s' % protocol) # accel, binary or compact
    which.append('--transport=%s' % transport)
    which.append('--port=%d' % port) # default to 9090
    if use_zlib:
      which.append('--zlib')
    if use_ssl:
      which.append('--ssl')
#    if options.verbose == 0:
#      which.append('-q')
#    if options.verbose == 2:
#      which.append('-v')

  server_args.extend(server_extra_args)
  cli_args.extend(client_extra_args)

  if options.verbose > 0:
    print 'Testing server: %s' % (' '.join(server_args))
    serverproc = subprocess.Popen(server_args)  
  else:
    serverproc = subprocess.Popen(server_args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
  def ensureServerAlive():
    if serverproc.poll() is not None:
      print ('FAIL: Server process (%s) failed with retcode %d'
             % (' '.join(server_args), serverproc.returncode))
      raise Exception('Server subprocess died, args: %s'
                      % (' '.join(server_args)))

  # Wait for the server to start accepting connections on the given port.
  sock = socket.socket()
  sleep_time = 0.1  # Seconds
  max_attempts = 100
  try:
    attempt = 0
    while sock.connect_ex(('127.0.0.1', port)) != 0:
      attempt += 1
      if attempt >= max_attempts:
        raise Exception("TestServer not ready on port %d after %.2f seconds"
                        % (port, sleep_time * attempt))
      ensureServerAlive()
      time.sleep(sleep_time)
  finally:
    sock.close()

  try:
    if options.verbose > 0:
      print 'Testing client: %s' % (' '.join(cli_args))
      ret = subprocess.call(cli_args)
    else:
      ret = subprocess.call(cli_args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    if ret != 0:
      return "Client subprocess failed, retcode=%d, args: %s" % (ret, ' '.join(cli_args))
      #raise Exception("Client subprocess failed, retcode=%d, args: %s" % (ret, ' '.join(cli_args)))
  finally:
    # check that server didn't die
    ensureServerAlive()
    extra_sleep = 0
    if extra_sleep > 0 and options.verbose > 0:
      print ('Giving (protocol=%s,zlib=%s,ssl=%s) an extra %d seconds for child'
             'processes to terminate via alarm'
             % (protocol, use_zlib, use_ssl, extra_sleep))
      time.sleep(extra_sleep)
    os.kill(serverproc.pid, signal.SIGKILL)
    serverproc.wait()

test_count = 0
failed = 0

with open('tests.json') as data_file:    
    data = json.load(data_file)

for server in data["server"]:
  server_executable = server["executable"]
  server_extra_args = ""
  if "extra_args" in server:
    server_extra_args = server["extra_args"]
  for protocol in server["protocols"]:
    for transport in server["transports"]:
      for client in data["client"]:
        client_executable = client["executable"]
        client_extra_args = ""
        if "extra_args" in client:
          client_extra_args = client["extra_args"]
        if protocol in client["protocols"]:
          if transport in client["transports"]:
            ret = runServiceTest(server_executable, server_extra_args, client_executable, client_extra_args, protocol, transport, 9090, 0, 0)
            if ret != None:
              failed += 1
              print "Error: %s" % ret
              print "Using"   
              print (' Server: %s --protocol=%s --transport=%s %s'
                % (server_executable, protocol, transport, ' '.join(server_extra_args)))
              print (' Client: %s --protocol=%s --transport=%s %s'
                % (client_executable, protocol, transport, ''.join(client_extra_args)))


            test_count += 1

print '%s failed of %s tests in total' % (failed, test_count)