from Screen import Screen

import string

from Screens.HelpMenu import HelpableScreen
from Components.Label import Label
from Components.Slider import Slider
from Components.ActionMap import HelpableActionMap, NumberActionMap
from Components.config import config, configElementBoolean
from Components.Pixmap import *
from Components.MenuList import MenuList
from Components.ConfigList import ConfigList

from xml.sax import make_parser
from xml.sax.handler import ContentHandler

config.misc.firstrun = configElementBoolean("config.misc.firstrun", 1);

class Wizard(Screen, HelpableScreen):

	class parseWizard(ContentHandler):
		def __init__(self, wizard):
			self.isPointsElement, self.isReboundsElement = 0, 0
			self.wizard = wizard
			self.currContent = ""
		
		def startElement(self, name, attrs):
			print name
			self.currContent = name
			if (name == "step"):
				self.lastStep = int(attrs.get('number'))
				self.wizard[self.lastStep] = {"text": "", "list": [], "config": {"screen": None, "args": None, "type": "" }, "code": ""}
			elif (name == "text"):
				self.wizard[self.lastStep]["text"] = string.replace(str(attrs.get('value')), "\\n", "\n")
			elif (name == "listentry"):
				self.wizard[self.lastStep]["list"].append((str(attrs.get('caption')), str(attrs.get('step'))))
			elif (name == "config"):
				exec "from Screens." + str(attrs.get('module')) + " import *"
				self.wizard[self.lastStep]["config"]["screen"] = eval(str(attrs.get('screen')))
				if (attrs.has_key('args')):
					print "has args"
					self.wizard[self.lastStep]["config"]["args"] = str(attrs.get('args'))
				self.wizard[self.lastStep]["config"]["type"] = str(attrs.get('type'))
		def endElement(self, name):
			self.currContent = ""
			if name == 'code':
				self.wizard[self.lastStep]["code"] = self.wizard[self.lastStep]["code"].strip()
				
		def characters(self, ch):
			if self.currContent == "code":
				 self.wizard[self.lastStep]["code"] = self.wizard[self.lastStep]["code"] + ch
				
	def __init__(self, session):
		Screen.__init__(self, session)
		HelpableScreen.__init__(self)

		self.wizard = {}
		parser = make_parser()
		print "Reading " + self.xmlfile
		wizardHandler = self.parseWizard(self.wizard)
		parser.setContentHandler(wizardHandler)
		parser.parse('/usr/share/enigma2/' + self.xmlfile)
		
		self.numSteps = len(self.wizard)
		self.currStep = 1

		self["text"] = Label()

		self["config"] = ConfigList([])

		self["step"] = Label()
				
		self["stepslider"] = Slider(1, self.numSteps)
		
		self.list = []
		self["list"] = MenuList(self.list)

		self.onShown.append(self.updateValues)
		self.onClose.append(self.delReferences)
		
		self["actions"] = NumberActionMap(["WizardActions", "NumberActions"],
		{
			"ok": self.ok,
			"back": self.back,
			"left": self.left,
			"right": self.right,
			"up": self.up,
			"down": self.down,
			"1": self.keyNumberGlobal,
			"2": self.keyNumberGlobal,
			"3": self.keyNumberGlobal,
			"4": self.keyNumberGlobal,
			"5": self.keyNumberGlobal,
			"6": self.keyNumberGlobal,
			"7": self.keyNumberGlobal,
			"8": self.keyNumberGlobal,
			"9": self.keyNumberGlobal,
			"0": self.keyNumberGlobal
		}, -1)
		
		#self["actions"] = HelpableActionMap(self, "OkCancelActions",
			#{
				#"ok": (self.ok, _("Close this Screen...")),
			#})

	def back(self):
		self.currStep -= 1
		if self.currStep < 1:
			self.currStep = 1
		self.updateValues()
		
	def ok(self):
		print "OK"
		if (self.wizard[self.currStep]["config"]["screen"] != None):
			try: # don't die, if no run() is available
				self.configInstance.run()
			except:
				print "Failed to run configInstance"
		
		if (len(self.wizard[self.currStep]["list"]) > 0):
			nextStep = self.wizard[self.currStep]["list"][self["list"].l.getCurrentSelectionIndex()][1]
			if nextStep == "end":
				self.currStep = self.numSteps
			elif nextStep == "next":
				pass
			else:
				self.currStep = int(nextStep) - 1

		if (self.currStep == self.numSteps): # wizard finished
			config.misc.firstrun.value = 0;
			config.misc.firstrun.save()
			self.session.close()
		else:
			self.currStep += 1
			self.updateValues()
			
		print "Now: " + str(self.currStep)

	def keyNumberGlobal(self, number):
		if (self.wizard[self.currStep]["config"]["screen"] != None):
			self.configInstance.keyNumberGlobal(number)
		
	def left(self):
		if (self.wizard[self.currStep]["config"]["screen"] != None):
			self.configInstance.keyLeft()
		print "left"
	
	def right(self):
		if (self.wizard[self.currStep]["config"]["screen"] != None):
			self.configInstance.keyRight()
		print "right"

	def up(self):
		if (self.wizard[self.currStep]["config"]["screen"] != None):
			self["config"].instance.moveSelection(self["config"].instance.moveUp)
		elif (len(self.wizard[self.currStep]["list"]) > 0):
			self["list"].instance.moveSelection(self["list"].instance.moveUp)
		print "up"
		
	def down(self):
		if (self.wizard[self.currStep]["config"]["screen"] != None):
			self["config"].instance.moveSelection(self["config"].instance.moveDown)
		elif (len(self.wizard[self.currStep]["list"]) > 0):
			self["list"].instance.moveSelection(self["list"].instance.moveDown)
		print "down"
		
	def updateValues(self):
		print "Updating values in step " + str(self.currStep)
		self["step"].setText(_("Step ") + str(self.currStep) + "/" + str(self.numSteps))
		self["stepslider"].setValue(self.currStep)

		print _(self.wizard[self.currStep]["text"])
		self["text"].setText(_(self.wizard[self.currStep]["text"]))

		if self.wizard[self.currStep]["code"] != "":
			print self.wizard[self.currStep]["code"]
			exec(self.wizard[self.currStep]["code"])
		
		self["list"].instance.setZPosition(1)
		self.list = []
		if (len(self.wizard[self.currStep]["list"]) > 0):
			self["list"].instance.setZPosition(2)
			for x in self.wizard[self.currStep]["list"]:
				self.list.append((_(x[0]), None))
		self["list"].l.setList(self.list)

		self["config"].instance.setZPosition(1)
		if (self.wizard[self.currStep]["config"]["screen"] != None):
			if self.wizard[self.currStep]["config"]["type"] == "standalone":
				print "Type is standalone"
				self.session.openWithCallback(self.ok, self.wizard[self.currStep]["config"]["screen"])
			else:
				self["config"].instance.setZPosition(2)
				print self.wizard[self.currStep]["config"]["screen"]
				if self.wizard[self.currStep]["config"]["args"] == None:
					self.configInstance = self.session.instantiateDialog(self.wizard[self.currStep]["config"]["screen"])
				else:
					self.configInstance = self.session.instantiateDialog(self.wizard[self.currStep]["config"]["screen"], eval(self.wizard[self.currStep]["config"]["args"]))
				self["config"].l.setList(self.configInstance["config"].list)
				self.configInstance["config"] = self["config"]
		else:
			self["config"].l.setList([])

	def delReferences(self):
		del self.configInstance

class WizardManager:
	def __init__(self):
		self.wizards = []
	
	def registerWizard(self, wizard):
		self.wizards.append(wizard)
	
	def getWizards(self):
		if config.misc.firstrun.value:
			return self.wizards
		else:
			return []

wizardManager = WizardManager()