from Authorization import Authorization, kAuthorizationFlagDestroyRights
from Foundation import NSBundle, NSNotificationCenter, NSObject, NSURL
from AppKit import NSWorkspace
from appscript import app, k, its
import os, osax, subprocess, tempfile, SCNetworkReachability

appBundle = NSBundle.mainBundle()

def ensureKerberosPrincipalsValid(principals):
    kerberosApp = app(id='edu.mit.Kerberos.KerberosApp')
    validPrincipals = kerberosApp.caches.filter(its.time_remaining != 'Expired').principal.get()
    for principal in principals:
        if principal not in validPrincipals:
            # XXX make these async
            kerberosApp.renew_tickets(for_principal=principal)
            # kerberosApp.get_tickets(for_principal=principal)

def setVolumePercent(percent):
    # XXX should use CoreAudio: see Pester/Source/NJRSoundManager.m
    osax.setvolume(int(7 * percent))

def _openURL(url):
    ws = NSWorkspace.sharedWorkspace()
    url = NSURL.URLWithString_(url)
    return ws.openURL_(url)

class _LDURLWatcher(NSObject):
    def URLIsReachable_(self, notification):
        _openURL(notification.object())

_urlWatcher = _LDURLWatcher.alloc().init()
NSNotificationCenter.defaultCenter().addObserver_selector_name_object_(
    _urlWatcher, 'URLIsReachable:', SCNetworkReachability.SCNetworkIsReachable,
    None)

def openURL(url):
    hostname = NSURL.URLWithString_(url).host()
    if not SCNetworkReachability.notify_when_reachable(hostname, url):
        _openURL(url)

def openInBackground(path):
    ws = NSWorkspace.sharedWorkspace()
    path = os.path.expanduser(path)
    return ws.openFile_withApplication_andDeactivate_(path, None, False)

def setDisplayBrightnessPercent(percent):
    # XXX create brightness module
    pathToBrightness = appBundle.pathForResource_ofType_('brightness', None)
    subprocess.call([pathToBrightness, str(percent)], stderr=subprocess.STDOUT,
                    stdout=subprocess.PIPE)

def setAdiumStatus(status):
    # XXX doesn't match preset status if available
    adiumApp = app(id='com.adiumX.adiumX')
    if adiumApp.my_status_type() == k.offline:
        adiumApp.my_status.status_message_string.set(status)
    else:
        adiumApp.my_status_message.set(status)
    adiumApp.my_status_type.set(k.available)

def terminalDo(command):
    terminalApp = app(id='com.apple.Terminal')
    terminalApp.do_script(command + '; exit')

_auth = None

def authorizationDo(command, *args):
    global _auth
    if not _auth:
        _auth = Authorization(destroyflags=(kAuthorizationFlagDestroyRights,))
    return _auth.executeWithPrivileges(command, *args)

def stopVPNC():
    authorizationDo('/usr/bin/killall', 'vpnc')

def startVPNC(vpncProfile=None):
    stopVPNC()
    args = ['--kernel-ipsec']
    if vpncProfile:
        args.append('/etc/vpnc/%s.conf' % vpncProfile)
    # XXX get password from keychain, then use:
    # authorizationDo('/usr/local/sbin/vpnc', *args)
    terminalDo('sudo /usr/local/sbin/vpnc %s' % ' '.join(args))