from Screen import Screen
from Components.ActionMap import NumberActionMap
from Components.config import config, ConfigNothing
from Components.SystemInfo import SystemInfo
from Components.ConfigList import ConfigListScreen
from Components.Sources.StaticText import StaticText

import xml.etree.cElementTree

# 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.etree.cElementTree.parse(setupfile)
setupfile.close()

class SetupError(Exception):
    def __init__(self, message):
        self.msg = message

    def __str__(self):
        return self.msg

class SetupSummary(Screen):

	def __init__(self, session, parent):

		Screen.__init__(self, session, parent = parent)
		self["SetupTitle"] = StaticText(_(parent.setup_title))
		self["SetupEntry"] = StaticText("")
		self["SetupValue"] = StaticText("")
		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.getroot()
		for x in xmldata.findall("setup"):
			if x.get("key") != self.setup:
				continue
			self.addItems(list, x);
			self.setup_title = x.get("title", "").encode("UTF-8")

	def __init__(self, session, setup):
		Screen.__init__(self, session)
		# for the skin: first try a setup_<setupID>, then Setup
		self.skinName = ["setup_" + setup, "Setup" ]

		self.onChangedEntry = [ ]

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

		#check for list.entries > 0 else self.close
		self["key_red"] = StaticText(_("Cancel"))
		self["key_green"] = StaticText(_("OK"))

		self["actions"] = NumberActionMap(["SetupActions"], 
			{
				"cancel": self.keyCancel,
				"save": self.keySave,
			}, -2)

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

		self.changedEntry()
		self.onLayoutFinish.append(self.layoutFinished)

	def layoutFinished(self):
		self.setTitle(_(self.setup_title))

	# 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, parentNode):
		for x in parentNode:
			if x.tag == 'item':
				item_level = int(x.get("level", 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

				requires = x.get("requires")
				if requires and not SystemInfo.get(requires, False):
					continue;

				item_text = _(x.get("text", "??").encode("UTF-8"))
				b = eval(x.text or "");
				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.getroot()
	for x in xmldata.findall("setup"):
		if x.get("key") == id:
			return x.get("title", "").encode("UTF-8")
	raise SetupError("unknown setup id '%s'!" % repr(id))