from enigma import eServiceCenter, eServiceReference, pNavigation, getBestPlayableServiceReference, iPlayableService
from Components.ParentalControl import parentalControl
from Tools.BoundFunction import boundFunction
import RecordTimer
import SleepTimer

import NavigationInstance
import ServiceReference

# TODO: remove pNavgation, eNavigation and rewrite this stuff in python.
class Navigation:
	def __init__(self):
		if NavigationInstance.instance is not None:
			raise NavigationInstance.instance
		
		NavigationInstance.instance = self
		self.ServiceHandler = eServiceCenter.getInstance()
		
		import Navigation as Nav
		Nav.navcore = self
		
		self.pnav = pNavigation()
		self.pnav.m_event.get().append(self.dispatchEvent)
		self.pnav.m_record_event.get().append(self.dispatchRecordEvent)
		self.event = [ ]
		self.record_event = [ ]
		self.currentlyPlayingServiceReference = None
		self.currentlyPlayingService = None
		self.RecordTimer = RecordTimer.RecordTimer()
		self.SleepTimer = SleepTimer.SleepTimer()

	def dispatchEvent(self, i):
		for x in self.event:
			x(i)
		if i == iPlayableService.evEnd:
			self.currentlyPlayingServiceReference = None
			self.currentlyPlayingService = None

	def dispatchRecordEvent(self, rec_service, event):
#		print "record_event", rec_service, event
		for x in self.record_event:
			x(rec_service, event)

	def playService(self, ref, checkParentalControl = True):
		oldref = self.currentlyPlayingServiceReference
		if ref and oldref and ref == oldref:
			print "ignore request to play already running service"
			return 0
		print "playing", ref and ref.toString()
		if ref is None:
			self.stopService()
			return 0
		if not checkParentalControl or parentalControl.isServicePlayable(ref, boundFunction(self.playService, checkParentalControl = False)):
			if ref.flags & eServiceReference.isGroup:
				if not oldref:
					oldref = eServiceReference()
				playref = getBestPlayableServiceReference(ref, oldref)
				if not playref or (checkParentalControl and not parentalControl.isServicePlayable(playref, boundFunction(self.playService, checkParentalControl = False))):
					self.stopService()
					return 0
			else:
				playref = ref
			if self.pnav and not self.pnav.playService(playref):
				self.currentlyPlayingServiceReference = playref
				return 0
		else:
			self.stopService()
		return 1
	
	def getCurrentlyPlayingServiceReference(self):
		return self.currentlyPlayingServiceReference
	
	def recordService(self, ref):
		service = None
		print "recording service: %s" % (str(ref))
		if isinstance(ref, ServiceReference.ServiceReference):
			ref = ref.ref
		if ref:
			if ref.flags & eServiceReference.isGroup:
				ref = getBestPlayableServiceReference(ref, eServiceReference())
			service = ref and self.pnav and self.pnav.recordService(ref)
			if service is None:
				print "record returned non-zero"
		return service

	def stopRecordService(self, service):
		ret = self.pnav and self.pnav.stopRecordService(service)
		return ret

	def getRecordings(self):
		return self.pnav and self.pnav.getRecordings()

	def getCurrentService(self):
		if not self.currentlyPlayingService:
			self.currentlyPlayingService = self.pnav and self.pnav.getCurrentService()
		return self.currentlyPlayingService

	def stopService(self):
		print "stopService"
		if self.pnav:
			self.pnav.stopService()

	def pause(self, p):
		return self.pnav and self.pnav.pause(p)

	def recordWithTimer(self, ref, begin, end, name, description, eit):
		if isinstance(ref, eServiceReference):
			ref = ServiceReference.ServiceReference(ref)
		entry = RecordTimer.RecordTimerEntry(ref, begin, end, name, description, eit)
		self.RecordTimer.record(entry)
		return entry
	
	def shutdown(self):
		self.RecordTimer.shutdown()
		self.ServiceHandler = None
		self.pnav = None

	def stopUserServices(self):
		self.stopService()