#!/usr/bin/python
# Copyright 2007 Dan Smith <dsmith@danplanet.com>

import ConfigParser
import devices

class Location:
    def __init__(self, config, name):
        self.name = name

        # Required keys
        self.caption = ""
        self.subnet = None
        self.devices = []

        # Extra properties
        self.auxprops = {}

        for k,v in config.items(name):
            if k == "caption":
                self.caption = v
            elif k == "subnet":
                self.subnet = v
            elif k == "devices":
                self.devices = v.split()
            else:
                self.auxprops[k] = v

    def amIHere(self, dev):
        if self.devices:
            if dev.getName() not in self.devices:
                return False

        if self.subnet:
            if self.subnet not in dev.getIP4Address():
                return False

        return True

    def auxStrings(self):
        s = []
        for k,v in self.auxprops.items():
            s.append("%s=%s" % (k, v))

        return s

    def __str__(self):
        base = "%s: %s\n  %s\n  %s\n" % (self.name,
                                         self.caption,
                                         self.subnet,
                                         self.devices)
        aux = ""
        for k,v in self.auxprops.items():
            aux += "  %s = %s" % (k,v)

        return base + aux

class LocationFactory:
    def __init__(self, config_file):
        self.config = ConfigParser.ConfigParser()
        self.config.read(config_file)

    def locations(self):
        locations = []

        for loc in self.config.sections():
            if loc != "default":
                locations.append(Location(self.config, loc))

        return locations

class LocationService:
    def __init__(self, config_file):
        self.config_file = config_file

    def current_location(self):
        locs = LocationFactory(self.config_file).locations()
        dev = devices.NetworkDeviceFactory().getDefaultDevice()

        for loc in locs:
            if loc.amIHere(dev):
                return loc

if __name__ == "__main__":
    import sys
    lf = LocationFactory(sys.argv[1])
    for loc in lf.locations():
        print loc

    print ""

    ls = LocationService(sys.argv[1])
    print ls.current_location()