# -*- Mode:python; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
#
# Copyright (C) 2014-2015 Regents of the University of California.
# Author: Jeff Thompson <jefft0@remap.ucla.edu>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
# A copy of the GNU Lesser General Public License is in the file COPYING.

try:
    # Use builtin asyncio on Python 3.4+, or Tulip on Python 3.3
    import asyncio
except ImportError:
    # Use Trollius on Python <= 3.2
    import trollius as asyncio
from pyndn import Name
from pyndn import ThreadsafeFace

def dump(*list):
    result = ""
    for element in list:
        result += (element if type(element) is str else repr(element)) + " "
    print(result)

class Counter(object):
    def __init__(self):
        self._callbackCount = 0

    def onData(self, interest, data):
        self._callbackCount += 1
        dump("Got data packet with name", data.getName().toUri())
        # Use join to convert each byte to chr.
        dump(data.getContent().toRawStr())

    def onTimeout(self, interest):
        self._callbackCount += 1
        dump("Time out for interest", interest.getName().toUri())
    
    def onInterest(self,prefix,interest,face,interestFilterId,filter):
        self._callbackCount+=1
	dump("Receive interest", interest.toUri())

    def onRegisterFailed(self,prefix):
        dump("Register failed for prefix")

def main():
    loop = asyncio.get_event_loop()
    face = ThreadsafeFace(loop, "aleph.ndn.ucla.edu")

    counter = Counter()
    face.stopWhen(lambda: counter._callbackCount >= 10)
	
    face.registerPrefix("/home",counter.onInterest,counter.onRegisterFailed)
    #name1 = Name("/")
    #dump("Express name ", name1.toUri())
    # This call to exressIinterest is thread safe because face is a ThreadsafeFace.
    #face.expressInterest(name1, counter.onData, counter.onTimeout)

    # Run until stopWhen stops the loop.
    loop.run_forever()
    face.shutdown()

main()