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

from appscript import app, k
from AppKit import NSApplication, NSBeep, NSSystemDefined, NSURL, NSWorkspace
from Foundation import NSDistributedNotificationCenter
from PyObjCTools import AppHelper
from Carbon.CarbonEvt import RegisterEventHotKey, GetApplicationEventTarget
from Carbon.Events import cmdKey
import struct
import scrape
import _StreamVision

GROWL_APP_NAME = 'StreamVision'
NOTIFICATION_TRACK_INFO = 'iTunes Track Info'
NOTIFICATIONS_ALL = [NOTIFICATION_TRACK_INFO]

kEventHotKeyPressedSubtype = 6
kEventHotKeyReleasedSubtype = 9

growl = app('GrowlHelperApp')

growl.register(
    as_application=GROWL_APP_NAME,
    all_notifications=NOTIFICATIONS_ALL,
    default_notifications=NOTIFICATIONS_ALL,
    icon_of_application='iTunes.app')
    # if we leave off the .app, we can get Classic iTunes's icon

def growlNotify(title, description, **kw):
    growl.notify(
        with_name=NOTIFICATION_TRACK_INFO,
        title=title,
        description=description,
        application_name=GROWL_APP_NAME,
        **kw)

def radioParadiseURL():
    session = scrape.Session()
    session.go('http://www2.radioparadise.com/nowplay_b.php')
    return session.region.firsttag('a')['href']

def cleanStreamTitle(title):
    if title == k.MissingValue:
        return ''
    title = title.split(' [')[0] # XXX move to description
    title = title.replace('`', u'’')
    return title

def cleanStreamTrackName(name):
    name = name.split('. ')[0]
    name = name.split(': ')[0]
    name = name.split(' - ')
    if len(name) > 1:
        name = ' - '.join(name[:-1])
    else:
        name = name[0]
    return name

def iTunesApp():
    return app(id='com.apple.iTunes')

class StreamVision(NSApplication):

    hotKeyActions = {}
    hotKeys = []

    def displayTrackInfo(self):
        iTunes = iTunesApp()
        if iTunes.player_state.get() == k.playing:
            if iTunes.current_track.class_.get() == k.URL_track:
                growlNotify(cleanStreamTitle(iTunes.current_stream_title.get()),
                            cleanStreamTrackName(iTunes.current_track.name.get()))
            else:
                kw = {}
                artwork = iTunes.current_track.artworks.get()
                if artwork:
                    kw['pictImage'] = artwork[0].data.get()
                growlNotify(iTunes.current_track.name.get(),
                            iTunes.current_track.album.get() + "\n" +
                            iTunes.current_track.artist.get(),
                            **kw)
        else:
            trackName = ''
            if iTunes.current_track.class_.get() != k.Property:
                trackName = iTunes.current_track.name.get()
            growlNotify("iTunes is not playing.", trackName)

    def goToSite(self):
        iTunes = iTunesApp()
        if iTunes.player_state.get() == k.playing:
            url = iTunes.current_stream_URL.get()
            if url:
                if 'radioparadise.com' in url:
                    url = radioParadiseURL()
                NSWorkspace.sharedWorkspace().openURL_(NSURL.URLWithString_(url))
                return
        NSBeep()

    def registerHotKey(self, func, keyCode, mods=0):
        hotKeyRef = RegisterEventHotKey(keyCode, mods, (0, 0),
                                        GetApplicationEventTarget(), 0)
        self.hotKeys.append(hotKeyRef)
        self.hotKeyActions[_StreamVision.HotKeyAddress(hotKeyRef)] = func

    def finishLaunching(self):
        super(StreamVision, self).finishLaunching()
        self.registerHotKey(self.displayTrackInfo, 100) # F8
        self.registerHotKey(self.goToSite, 100, cmdKey) # cmd-F8
        self.registerHotKey(lambda: iTunesApp().playpause(), 101) # F9
        self.registerHotKey(lambda: iTunesApp().previous_track(), 109) # F10
        self.registerHotKey(lambda: iTunesApp().next_track(), 103) # F11
        NSDistributedNotificationCenter.defaultCenter().addObserver_selector_name_object_(self, self.displayTrackInfo, 'com.apple.iTunes.playerInfo', None)

    def sendEvent_(self, theEvent):
        if theEvent.type() == NSSystemDefined and \
               theEvent.subtype() == kEventHotKeyPressedSubtype:
            self.hotKeyActions[theEvent.data1()]()
        super(StreamVision, self).sendEvent_(theEvent)

if __name__ == "__main__":
    AppHelper.runEventLoop()