#!/usr/bin/python
# -*- coding: utf-8 -*-

from appscript import *
from aem import AEEnum
import sys
import time

def iTunes_main_pane():
    return app(u'System Events').application_processes[u'iTunes'].windows[u'iTunes'].scroll_areas[1]

def wait_for_podcast_update(iTunes):
    # show 'Podcasts'
    iTunes.playlists[its.special_kind == AEEnum('kSpP')].reveal()
    podcast_status = iTunes_main_pane().outlines[1].rows.static_texts[1].value
    # XXX this can fail if iTunes is hidden; fix it
    while any(status in (u'downloading', u'queued for download')
              for status in podcast_status.get()):
        time.sleep(0.5)

def sync_devices(iTunes):
    try:
        iTunes.update()
    except CommandError:
        print >> sys.stderr, 'No iOS devices detected.  Waiting for an iOS device...'
        while True:
            time.sleep(0.5)
            try:
                iTunes.update()
                return
            except CommandError:
                pass

    # show first iOS device
    iTunes.sources[its.kind == AEEnum('kPod')].sources[1].library_playlists[1].reveal()

    # wait for update to complete
    def sync_enabled():
        try:
            iTunes_main_pane().buttons[u'Apply'].click()
        except CommandError:
            pass
        try:
            return iTunes_main_pane().buttons[u'Sync'].enabled.get()
        except CommandError:
            pass

    while not sync_enabled():
        time.sleep(0.5)

if __name__ == '__main__':
    iTunes = app('iTunes')
    print >> sys.stderr, 'Starting podcast update...'
    iTunes.updateAllPodcasts()
    print >> sys.stderr, 'Synchronizing iOS devices...'
    sync_devices(iTunes)
    print >> sys.stderr, 'Updating podcasts...'
    iTunes.updateAllPodcasts()
    wait_for_podcast_update(iTunes)
    print >> sys.stderr, 'Synchronizing iOS devices...'
    sync_devices(iTunes)
    app(id='net.sabi.UpdatePodcasts').quit()