from Screen import Screen
from Components.ActionMap import NumberActionMap
from Components.config import config, ConfigNothing
from Components.ConfigList import ConfigListScreen
from Components.Label import Label
from Components.Pixmap import Pixmap

import xml.dom.minidom
from skin import elementsWithTag

from Tools import XMLTools

# FIXME: use resolveFile!
# read the setupmenu
try:
	# first we search in the current path
	setupfile = file('data/setup.xml', 'r')
except:
	# if not found in the current path, we use the global datadir-path
	setupfile = file('/usr/share/enigma2/setup.xml', 'r')
setupdom = xml.dom.minidom.parseString(setupfile.read())
setupfile.close()

class SetupSummary(Screen):
	skin = """
	<screen position="6,0" size="120,64">
		<widget name="SetupTitle" position="6,0" size="120,16" font="Regular;12" />
		<widget name="SetupEntry" position="6,16" size="120,32" font="Regular;12" />
		<widget name="SetupValue" position="6,48" size="120,16" font="Regular;12" />
	</screen>"""

	def __init__(self, session, parent):
		Screen.__init__(self, session)
		self["SetupTitle"] = Label(_(parent.setup_title))
		self["SetupEntry"] = Label("")
		self["SetupValue"] = Label("")
		self.parent = parent
		self.onShow.append(self.addWatcher)
		self.onHide.append(self.removeWatcher)
		
	def addWatcher(self):
		self.parent.onChangedEntry.append(self.selectionChanged)
		self.parent["config"].onSelectionChanged.append(self.selectionChanged)
		self.selectionChanged()
	
	def removeWatcher(self):
		self.parent.onChangedEntry.remove(self.selectionChanged)
		self.parent["config"].onSelectionChanged.remove(self.selectionChanged)

	def selectionChanged(self):
		self["SetupEntry"].text = self.parent.getCurrentEntry()
		self["SetupValue"].text = self.parent.getCurrentValue()

class Setup(ConfigListScreen, Screen):

	ALLOW_SUSPEND = True

	def removeNotifier(self):
		config.usage.setup_level.notifiers.remove(self.levelChanged)

	def levelChanged(self, configElement):
		list = []
		self.refill(list)
		self["config"].setList(list)

	def refill(self, list):
		xmldata = setupdom.childNodes[0]
		entries = xmldata.childNodes
		for x in entries:             #walk through the actual nodelist
			if x.nodeType != xml.dom.minidom.Element.nodeType:
				continue
			elif x.tagName == 'setup':
				if x.getAttribute("key") != self.setup:
					continue
				self.addItems(list, x.childNodes);
				self.setup_title = x.getAttribute("title").encode("UTF-8")

	def __init__(self, session, setup):
		Screen.__init__(self, session)

		self.onChangedEntry = [ ]

		self.setup = setup
		list = []
		self.refill(list)

		#check for list.entries > 0 else self.close
		self["title"] = Label(_(self.setup_title))

		self["oktext"] = Label(_("OK"))
		self["canceltext"] = Label(_("Cancel"))
		self["ok"] = Pixmap()
		self["cancel"] = Pixmap()
		
		self["actions"] = NumberActionMap(["SetupActions"], 
			{
				"cancel": self.keyCancel,
				"save": self.keySave,
			}, -2)

		ConfigListScreen.__init__(self, list, session = session, on_change = self.changedEntry)

		self.changedEntry()

	# for summary:
	def changedEntry(self):
		for x in self.onChangedEntry:
			x()

	def getCurrentEntry(self):
		return self["config"].getCurrent()[0]

	def getCurrentValue(self):
		return str(self["config"].getCurrent()[1].getText())

	def createSummary(self):
		return SetupSummary

	def addItems(self, list, childNode):
		for x in childNode:
			if x.nodeType != xml.dom.minidom.Element.nodeType:
				continue
			elif x.tagName == 'item':
				item_level = int(x.getAttribute("level") or "0")

				if not self.levelChanged in config.usage.setup_level.notifiers:
					config.usage.setup_level.notifiers.append(self.levelChanged)
					self.onClose.append(self.removeNotifier)

				if item_level > config.usage.setup_level.index:
					continue

				item_text = _(x.getAttribute("text").encode("UTF-8") or "??")
				b = eval(XMLTools.mergeText(x.childNodes));
				if b == "":
					continue
				#add to configlist
				item = b
				# the first b is the item itself, ignored by the configList.
				# the second one is converted to string.
				if not isinstance(item, ConfigNothing):
					list.append( (item_text, item) )

def getSetupTitle(id):
	xmldata = setupdom.childNodes[0].childNodes
	for x in elementsWithTag(xmldata, "setup"):
		if x.getAttribute("key") == id:
			return x.getAttribute("title").encode("UTF-8")
	raise "unknown setup id '%s'!" % repr(id)