"""
mbed SDK
Copyright (c) 2011-2013 ARM Limited

Licensed 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.
"""

import sys
import socket
from sys import stdout
from host_test import HostTestResults, Test
from SocketServer import BaseRequestHandler, UDPServer


SERVER_IP = str(socket.gethostbyname(socket.getfqdn()))
SERVER_PORT = 7


class UDPEchoClientTest(Test):
    def __init__(self):
        HostTestResults.__init__(self)
        Test.__init__(self)

    def send_server_ip_port(self, ip_address, port_no):
        c = self.mbed.serial_readline() # 'UDPCllient waiting for server IP and port...'
        if c is None:
            self.print_result(self.RESULT_IO_SERIAL)
            return
        self.notify(c.strip())

        self.notify("HOST: Sending server IP Address to target...")
        connection_str = ip_address + ":" + str(port_no) + "\n"
        self.mbed.serial_write(connection_str)

        c = self.mbed.serial_readline() # 'UDPCllient waiting for server IP and port...'
        if c is None:
            self.print_result(self.RESULT_IO_SERIAL)
            return
        self.notify(c.strip())
        return self.RESULT_PASSIVE

    def test(self):
        # Returning none will suppress host test from printing success code
        return None


class UDPEchoClient_Handler(BaseRequestHandler):
    def handle(self):
        """ One handle per connection
        """
        data, socket = self.request
        socket.sendto(data, self.client_address)
        if '{{end}}' in data:
            print
            print data
        else:
            sys.stdout.write('.')
        stdout.flush()


server = UDPServer((SERVER_IP, SERVER_PORT), UDPEchoClient_Handler)
print "HOST: Listening for UDP connections..."

mbed_test = UDPEchoClientTest();
mbed_test.run()
mbed_test.send_server_ip_port(SERVER_IP, SERVER_PORT)

server.serve_forever()