#!/usr/bin/python
# Copyright (c) 2010 Timo Juhani Lindfors <timo.lindfors@iki.fi>
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

import gobject
import gps
                    
class UI:
    def __init__(self, loop):
        self.loop = loop
        self.daemon = gps.gps(host = "localhost",
                              port = "2947",
                              mode = gps.WATCH_ENABLE | gps.WATCH_JSON | gps.WATCH_SCALED,
                              verbose = 0)
        gobject.io_add_watch(self.daemon.sock, gobject.IO_IN, self.handle_response)
        gobject.io_add_watch(self.daemon.sock, gobject.IO_ERR, self.handle_hangup)
        gobject.io_add_watch(self.daemon.sock, gobject.IO_HUP, self.handle_hangup)

    def handle_response(self, source, condition):
        if self.daemon.poll() == -1:
            self.handle_hangup(source, condition)
        report = self.daemon.data
        fields = report.keys()
        if "class" in fields:
            if report["class"] == "TPV":
                if "time" in fields:
                    print("%s" % report["time"])
                if "mode" in fields and "lat" in fields and "lon" in fields:
                    if report["mode"] == 2 or report["mode"] == 3:
                        print("%s %s" % (report["lat"], report["lon"]))
        return True

    def handle_hangup(self, source, condition):
        print("hangup")
        self.loop.quit()
        return True

if __name__ == "__main__":
    loop = gobject.MainLoop()
    UI(loop)
    loop.run()