from Screen import Screen
from Components.Button import Button
from Components.ServiceList import ServiceList
from Components.ActionMap import ActionMap
from EpgSelection import EPGSelection
from enigma import eServiceReference, eEPGCache, eEPGCachePtr, eServiceCenter, eServiceCenterPtr, iMutableServiceListPtr, iStaticServiceInformationPtr, eTimer
from Components.config import config, configElement, ConfigSubsection, configText
from Screens.FixedMenu import FixedMenu

import xml.dom.minidom

class BouquetSelector(FixedMenu):
	def __init__(self, session, bouquets, parent):
		self.parent=parent
		entrys = [ ]
		for x in bouquets:
			entrys.append((x[0], self.bouquetSelected, x[1]))
		FixedMenu.__init__(self, session, "Bouquetlist", entrys)
		self.skinName = "Menu"

	def bouquetSelected(self):
		self.parent.addCurrentServiceToBouquet(self["menu"].getCurrent()[2])
		self.close()

class ChannelContextMenu(FixedMenu):
	def __init__(self, session, csel):
		self.csel = csel

		menu = [ ]

		inBouquetRootList = csel.servicelist.getRoot().toString().find('FROM BOUQUET "bouquets.') != -1 #FIXME HACK
		inBouquet = csel.getMutableList() is not None

		if not csel.bouquet_mark_edit and not csel.movemode and not inBouquetRootList:
			menu.append(("add service to bouquet", self.addServiceToBouquetSelected))
			if inBouquet:
				menu.append(("remove service", self.removeCurrentService))

		if inBouquet: # current list is editable?
			if not csel.bouquet_mark_edit:
				if not csel.movemode:
					menu.append(("enable move mode", self.toggleMoveMode))
					if not inBouquetRootList: 
						menu.append(("enable bouquet edit", self.bouquetMarkStart))
				else:
					menu.append(("disable move mode", self.toggleMoveMode))
			elif not inBouquetRootList: 
				menu.append(("end bouquet edit", self.bouquetMarkEnd))
				menu.append(("abort bouquet edit", self.bouquetMarkAbort))

		menu.append(("back", self.close))

		FixedMenu.__init__(self, session, "Channel Selection", menu)
		self.skinName = "Menu"

	def addServiceToBouquetSelected(self):
		bouquets = [ ]
		serviceHandler = eServiceCenter.getInstance()
		list = serviceHandler.list(self.csel.bouquet_root)
		if not list is None:
			while True:
				s = list.getNext()
				if not s.valid():
					break
				if ((s.flags & eServiceReference.flagDirectory) == eServiceReference.flagDirectory):
					info = serviceHandler.info(s)
					if not info is None:
						bouquets.append((info.getName(s), s))
		cnt = len(bouquets)
		if cnt > 1: # show bouquet list
			self.session.open(BouquetSelector, bouquets, self)
		elif cnt == 1: # add to only one existing bouquet
			self.addCurrentServiceToBouquet(bouquet[0][1])
		else: #no bouquets in root.. so assume only one favourite list is used
			self.addCurrentServiceToBouquet(self.csel.bouquet_root)

	def addCurrentServiceToBouquet(self, dest):
		self.csel.addCurrentServiceToBouquet(dest)
		self.close()

	def removeCurrentService(self):
		self.csel.removeCurrentService()
		self.close()

	def toggleMoveMode(self):
		self.csel.toggleMoveMode()
		self.close()

	def bouquetMarkStart(self):
		self.csel.startMarkedEdit()
		self.close()

	def bouquetMarkEnd(self):
		self.csel.endMarkedEdit(abort=False)
		self.close()

	def bouquetMarkAbort(self):
		self.csel.endMarkedEdit(abort=True)
		self.close()

class ChannelSelection(Screen):
	def lastService(self):
		self.lastServiceTimer.stop()
		#zap to last running tv service
		self.setRoot(eServiceReference(config.tv.lastroot.value))
		self.session.nav.playService(eServiceReference(config.tv.lastservice.value))

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

		#config for lastservice
		config.tv = ConfigSubsection();
		config.tv.lastservice = configElement("config.tv.lastservice", configText, "", 0);
		config.tv.lastroot = configElement("config.tv.lastroot", configText, "", 0);

		self.entry_marked = False
		self.movemode = False
		self.bouquet_mark_edit = False
		#self.bouquet_root = eServiceReference('1:7:1:0:0:0:0:0:0:0:(type == 1) FROM BOUQUET "bouquets.tv" ORDER BY bouquet')
		self.bouquet_root = eServiceReference('1:7:1:0:0:0:0:0:0:0:(type == 1) FROM BOUQUET "userbouquet.favourites.tv" ORDER BY bouquet')
		self.mutableList = None

		self.__marked = [ ]

		self["key_red"] = Button("All")
		self["key_green"] = Button("Provider")
		self["key_yellow"] = Button("Satellite")
		self["key_blue"] = Button("Favourites")

		self["list"] = ServiceList()
		self.servicelist = self["list"]

		if config.tv.lastroot.value == "":
			self.servicelist.setRoot(eServiceReference("""1:0:1:0:0:0:0:0:0:0:(type == 1)"""))
		#self["okbutton"] = Button("ok", [self.channelSelected])

		self.lastServiceTimer = eTimer()
		self.lastServiceTimer.timeout.get().append(self.lastService)
		self.lastServiceTimer.start(100)

		class ChannelActionMap(ActionMap):
			def action(self, contexts, action):
				if action[:7] == "bouquet":
					l = self.csel
					if action.find("FROM BOUQUET") != -1:
						l.setRoot(eServiceReference("1:7:1:0:0:0:0:0:0:0:" + action[8:]))
					else:
						l.setRoot(eServiceReference("1:0:1:0:0:0:0:0:0:0:" + action[8:]))
				else:
					if action == "cancel":
						l = self.csel
						if l.movemode: #movemode active?
							l.channelSelected() # unmark
							l.toggleMoveMode() # disable move mode
						elif l.bouquet_mark_edit:
							l.endMarkedEdit(True) # abort edit mode
					ActionMap.action(self, contexts, action)

		self["actions"] = ChannelActionMap(["ChannelSelectActions", "OkCancelActions", "ContextMenuActions"],
			{
				"cancel": self.close,
				"ok": self.channelSelected,
				"mark": self.doMark,
				"contextMenu": self.doContext,
				"showFavourites": self.showFavourites,
				"showEPGList": self.showEPGList
			})
		self["actions"].csel = self

	def showEPGList(self):
		ref=self.servicelist.getCurrent()
		ptr=eEPGCache.getInstance()
		if ptr.startTimeQuery(ref) != -1:
			self.session.open(EPGSelection, ref)
		else:
			print 'no epg for service', ref.toString()

	def getMutableList(self, root=eServiceReference()):
		if not self.mutableList is None:
			return self.mutableList
		serviceHandler = eServiceCenter.getInstance()
		if not root.valid():
			root=self.servicelist.getRoot()
		list = serviceHandler.list(root)
		if list is not None:
			return list.startEdit()
		return None

#  multiple marked entry stuff ( edit mode, later multiepg selection )
	def startMarkedEdit(self):
		self.mutableList = self.getMutableList()
		# add all services from the current list to internal marked set in listboxservicecontent
		self.bouquetRoot = self.servicelist.getRoot()
		self.clearMarks() # this clears the internal marked set in the listboxservicecontent
		self.bouquet_mark_edit = True
		self.__marked = self.servicelist.getRootServices()
		for x in self.__marked:
			self.servicelist.addMarked(eServiceReference(x))

	def endMarkedEdit(self, abort):
		if not abort and self.mutableList is not None:
			new_marked = set(self.servicelist.getMarked())
			old_marked = set(self.__marked)
			removed = old_marked - new_marked
			added = new_marked - old_marked
			changed = False
			for x in removed:
				changed = True
				self.mutableList.removeService(eServiceReference(x))
			for x in added:
				changed = True
				self.mutableList.addService(eServiceReference(x))
			if changed:
				self.mutableList.flushChanges()
				self.setRoot(self.bouquetRoot)
				#self.showFavourites()
		self.__marked = []
		self.clearMarks()
		self.bouquet_mark_edit = False
		self.bouquetRoot = None
		self.mutableList = None

	def clearMarks(self):
		self.servicelist.clearMarks()

	def doMark(self):
		ref = self.servicelist.getCurrent()
		if self.servicelist.isMarked(ref):
			self.servicelist.removeMarked(ref)
		else:
			self.servicelist.addMarked(ref)

	def removeCurrentService(self):
		ref = self.servicelist.getCurrent()
		mutableList = self.getMutableList()
		if ref.valid() and mutableList is not None:
			if not mutableList.removeService(ref):
				mutableList.flushChanges() #FIXME dont flush on each single removed service
				self.setRoot(self.servicelist.getRoot())

	def addCurrentServiceToBouquet(self, dest):
		mutableList = self.getMutableList(dest)
		if not mutableList is None:
			if not mutableList.addService(self.servicelist.getCurrent()):
				mutableList.flushChanges()
		self.close()

	def searchNumberHelper(self, serviceHandler, num, bouquet):
		servicelist = serviceHandler.list(bouquet)
		if not servicelist is None:
			while num:
				serviceIterator = servicelist.getNext()
				if not serviceIterator.valid(): #check end of list
					break
				if serviceIterator.flags: #assume normal dvb service have no flags set
					continue
				num -= 1;
			if not num: #found service with searched number ?
				return serviceIterator, 0
		return None, num

	def zapToNumber(self, number):
		bouquet = self.bouquet_root
		service = None
		serviceHandler = eServiceCenter.getInstance()
		if bouquet.toString().find('FROM BOUQUET "bouquets.') == -1: #FIXME HACK
			service, number = self.searchNumberHelper(serviceHandler, number, bouquet)
		else:
			bouquetlist = serviceHandler.list(bouquet)
			if not bouquetlist is None:
				while number:
					bouquet = bouquetlist.getNext()
					if not bouquet.valid(): #check end of list
						break
					if ((bouquet.flags & eServiceReference.flagDirectory) != eServiceReference.flagDirectory):
						continue
					service, number = self.searchNumberHelper(serviceHandler, number, bouquet)
		if not service is None:
			self.session.nav.playService(service) #play service
			if self.servicelist.getRoot() != bouquet: #already in correct bouquet?
				self.setRoot(bouquet)
			self.servicelist.setCurrent(service) #select the service in servicelist

	def getBouquetNumOffset(self, bouquet):
		if self.bouquet_root.toString().find('FROM BOUQUET "bouquets.') == -1: #FIXME HACK
			return 0
		offsetCount = 0
		serviceHandler = eServiceCenter.getInstance()
		bouquetlist = serviceHandler.list(self.bouquet_root)
		if not bouquetlist is None:
			while True:
				bouquetIterator = bouquetlist.getNext()
				if not bouquetIterator.valid() or bouquetIterator == bouquet: #end of list or bouquet found
					break
				if ((bouquetIterator.flags & eServiceReference.flagDirectory) != eServiceReference.flagDirectory):
					continue
				servicelist = serviceHandler.list(bouquetIterator)
				if not servicelist is None:
					while True:
						serviceIterator = servicelist.getNext()
						if not serviceIterator.valid(): #check if end of list
							break
						if serviceIterator.flags: #playable services have no flags
							continue
						offsetCount += 1
		return offsetCount

	def setRoot(self, root):
		if not self.movemode: # dont change root when movemode is enabled
			inBouquetRootList = root.toString().find('FROM BOUQUET "bouquets.') != -1 #FIXME HACK
			if not inBouquetRootList and ((root.flags & eServiceReference.flagDirectory) == eServiceReference.flagDirectory):
				self.servicelist.setMode(ServiceList.MODE_FAVOURITES)
				self.servicelist.setNumberOffset(self.getBouquetNumOffset(root))
			else:
				self.servicelist.setMode(ServiceList.MODE_NORMAL)
			self.servicelist.setRoot(root)

	def channelSelected(self):
		ref = self.servicelist.getCurrent()
		if self.movemode:
			if self.entry_marked:
				self.servicelist.setCurrentMarked(False)
				self.entry_marked = False
			else:
				self.servicelist.setCurrentMarked(True)
				self.entry_marked = True
		elif (ref.flags & 7) == 7:
			self.setRoot(ref)
		elif self.bouquet_mark_edit:
			self.doMark()
		else:
			self.session.nav.playService(ref)
			self.saveChannel()
			self.close()

	#called from infoBar
	def zap(self):
		self.session.nav.playService(self.servicelist.getCurrent())
		self.saveChannel()

	def moveUp(self):
		self.servicelist.moveUp()

	def moveDown(self):
		self.servicelist.moveDown()

	def doContext(self):
		self.session.open(ChannelContextMenu, self)

	def toggleMoveMode(self):
		if self.movemode:
			if self.entry_marked:
				self.channelSelected() # unmark current entry
			self.movemode = False
			self.mutableList.flushChanges() # FIXME add check if changes was made
			self.mutableList = None
		else:
			self.mutableList = self.getMutableList()
			self.movemode = True

	def showFavourites(self):
		self.setRoot(self.bouquet_root)

	def saveRoot(self, root):
		if root is not None:
			config.tv.lastroot.value = root.toString()
			config.tv.lastroot.save()

	def saveChannel(self):
		ref = self.session.nav.getCurrentlyPlayingServiceReference()
		if ref is not None:
			refstr = ref.toString()
		else:
			refstr = ""
		config.tv.lastservice.value = refstr
		config.tv.lastservice.save()