#!/usr/bin/env python
#
# Copyright 2013 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING.  If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#


from gnuradio import gr, gr_unittest, blocks
import random
import pmt
import time

class qa_socket_pdu (gr_unittest.TestCase):

    def setUp (self):
        random.seed(0)
        self.tb = gr.top_block ()

    def tearDown (self):
        self.tb = None

    def test_001 (self):
        # Test that blocks can be created and destroyed without hanging
        port = str(random.Random().randint(0, 30000) + 10000)
        self.pdu_send = blocks.socket_pdu("UDP_CLIENT", "localhost", port)
        self.pdu_recv = blocks.socket_pdu("UDP_SERVER", "localhost", port)
        self.pdu_send = None
        self.pdu_recv = None

    def test_002 (self):
        # Send a PDU through a pair of UDP sockets
        port = str(random.Random().randint(0, 30000) + 10000)
        srcdata = (0x64, 0x6f, 0x67, 0x65)
        data = pmt.init_u8vector(srcdata.__len__(), srcdata)
        pdu_msg = pmt.cons(pmt.PMT_NIL, data)

        self.pdu_source = blocks.message_strobe(pdu_msg, 500)
        self.pdu_recv = blocks.socket_pdu("UDP_SERVER", "localhost", port)
        self.pdu_send = blocks.socket_pdu("UDP_CLIENT", "localhost", port)

        self.dbg = blocks.message_debug()

        self.tb.msg_connect(self.pdu_source, "strobe", self.pdu_send, "pdus")
        self.tb.msg_connect(self.pdu_recv, "pdus", self.dbg, "store")

        self.tb.start ()
        time.sleep(1)
        self.tb.stop()
        self.tb.wait()
        self.pdu_send = None
        self.pdu_recv = None

        received = self.dbg.get_message(0)
        received_data = pmt.cdr(received)
        msg_data = []
        for i in range(4):
            msg_data.append(pmt.u8vector_ref(received_data, i))
        self.assertEqual(srcdata, tuple(msg_data))

    def test_003 (self):
        # Test that block stops when interacting with streaming interface
        port = str(random.Random().randint(0, 30000) + 10000)
        srcdata = (0x73, 0x75, 0x63, 0x68, 0x74, 0x65, 0x73, 0x74, 0x76, 0x65, 0x72, 0x79, 0x70, 0x61, 0x73, 0x73)
        tag_dict = {"offset": 0}
        tag_dict["key"] = pmt.intern("len")
        tag_dict["value"] = pmt.from_long(8)
        tag1 = gr.python_to_tag(tag_dict)
        tag_dict["offset"] = 8
        tag2 = gr.python_to_tag(tag_dict)
        tags = [tag1, tag2]

        src = blocks.vector_source_b(srcdata, False, 1, tags)
        ts_to_pdu = blocks.tagged_stream_to_pdu(blocks.byte_t, "len")
        pdu_send = blocks.socket_pdu("UDP_CLIENT", "localhost", "4141")
        #pdu_recv = blocks.socket_pdu("UDP_SERVER", "localhost", port)
        pdu_to_ts = blocks.pdu_to_tagged_stream(blocks.byte_t, "len")
        head = blocks.head(gr.sizeof_char, 10)
        sink = blocks.vector_sink_b(1)

        self.tb.connect(src, ts_to_pdu)
        self.tb.msg_connect(ts_to_pdu, "pdus", pdu_send, "pdus")
        # a UDP socket connects pdu_send to pdu_recv
        # TODO: test that the recv socket can be destroyed from downstream
        # that signals DONE. Also that we get the PDUs we sent
        #self.tb.msg_connect(pdu_recv, "pdus", pdu_to_ts, "pdus")
        #self.tb.connect(pdu_to_ts, head, sink)
        self.tb.run()

    def test_004 (self):
        # Test that the TCP server can stream PDUs <= the MTU size.
        port = str(random.Random().randint(0, 30000) + 10000)
        mtu = 10000
        srcdata = tuple(x % 256 for x in range(mtu))
        data = pmt.init_u8vector(srcdata.__len__(), srcdata)
        pdu_msg = pmt.cons(pmt.PMT_NIL, data)

        self.pdu_source = blocks.message_strobe(pdu_msg, 500)
        self.pdu_send = blocks.socket_pdu("TCP_SERVER", "localhost", port, mtu)
        self.pdu_recv = blocks.socket_pdu("TCP_CLIENT", "localhost", port, mtu)
        self.pdu_sink = blocks.message_debug()

        self.tb.msg_connect(self.pdu_source, "strobe", self.pdu_send, "pdus")
        self.tb.msg_connect(self.pdu_recv, "pdus", self.pdu_sink, "store")

        self.tb.start()
        time.sleep(1)
        self.tb.stop()
        self.tb.wait()

        received = self.pdu_sink.get_message(0)
        received_data = pmt.cdr(received)
        msg_data = []
        for i in range(mtu):
            msg_data.append(pmt.u8vector_ref(received_data, i))
        self.assertEqual(srcdata, tuple(msg_data))

if __name__ == '__main__':
    gr_unittest.run(qa_socket_pdu, "qa_socket_pdu.xml")

