#!/bin/env python
# vim:fileencoding=utf-8:ft=python
#
import gtk, cairo, urllib, re, gobject, sys, os

# Hier das Wetter entsprechend der URL auf wetteronline.de eintragen
CITY="Niedersachsen/Lueneburg"

# Load images ########################################################
class AppURLopener(urllib.FancyURLopener):
    version = "Mozilla/5.0"
urllib._urlopener = AppURLopener()
def loadImage(url):
	data = urllib.urlopen(url).read()
	loader = gtk.gdk.PixbufLoader()
	loader.write(data)
	loader.close()
	image = gtk.Image()
	image.set_from_pixbuf(loader.get_pixbuf())
	return image

# Load day ###########################################################
def load():
	try:
		url = "http://www.wetteronline.de/%s.htm" % CITY
		data = urllib.urlopen(url).read()
		url = "http://www.wetteronline.de" + re.search("\/cgi-bin[^\"]+", data).group(0)
		url = url.replace("region", "citybild")
		data = urllib.urlopen(url).read()
		data = re.search("<table[^>]+BGCOLOR.+?>(?s).+?<\/table>", data).group(0)
	except:
		print "Failed to load data from wetteronline"
		print " - Are you online?"
		print " - Maybe wetteronline changed their page design :/"
		sys.exit(1)

	table = gtk.Table()
	c = 0
	for day in re.findall("(?i)<b>([a-z]{2}, [0-9]+\.[0-9]+\.)<\/b>", data):
		table.attach(gtk.Label(day), c, c + 1, 0, 1)
		c += 1
	c = 0
	temps = re.findall("([0-9]+)&deg;C", data)
	for temp in (0, 1, 2):
		table.attach(gtk.Label(temps[temp] + "-" + temps[temp + 3] + u"°C"), c, c + 1, 1, 2)
		c += 1
	c = 0
	for image in re.findall("\/daten\/symbole\/vorhersagen\/standard\/[^\"]+", data)[:9]:
		url = "http://www.wetteronline.de" + image
		table.attach(loadImage(url), c % 3, (c % 3) + 1, c / 3 + 2, c / 3 + 3)
		c += 1
	return table

def reload():
	global wnd
	data = windowCreate()
	apply(data.move, wnd.get_position())
	wnd.destroy()
	data.show_all()
	wnd = data
	return True

# Create window #####################################################
def windowCreate():
	wnd = gtk.Window()
	wnd.set_decorated(False)
	wnd.set_type_hint(gtk.gdk.WINDOW_TYPE_HINT_SPLASHSCREEN)
	wnd.set_keep_below(True)
	wnd.move(wnd.get_screen().get_width() - 180, 10)
	wnd.stick()
	wnd.connect('delete-event', gtk.main_quit)
	try:
		wnd.set_app_paintable(True)
		wnd.set_colormap(wnd.get_screen().get_rgba_colormap())
		def expose(widget, event):
			context = widget.window.cairo_create()
			context.set_source_rgba(1.0, 1.0, 1.0, 0.0)
			context.set_operator(cairo.OPERATOR_SOURCE)
			context.paint()
			return False
		wnd.connect("expose-event", expose)
	except:
		print "Can't make window transparent"
	wnd.add(load())
	return wnd

if __name__ == "__main__":
	if os.fork() != 0:
		sys.exit(0)
	wnd = windowCreate()
	wnd.show_all()
	gobject.timeout_add(3600000, reload)
	gtk.main()