import StringIO
import re
from Sensor import FanSensor, TemperatureSensor
from ClusterNodeSensorsReadings import ClusterNodeSensorsReadings

class IpmiTool202Parser:
	def parseSensorOutput( self, strOutput, clusterNodeName ):
		sensorReadings=ClusterNodeSensorsReadings(clusterNodeName)
		f = StringIO.StringIO(strOutput)
		line = f.readline()
		while( len(line) > 0 ):
			#print line,
			matchObj = re.match( '^Sensor ID[ ]*\: \'(?P<sensorName>[a-zA-Z 0-9]+)\'', line )
			if matchObj:
				sensorName = matchObj.group('sensorName')
				# print sensorName
				# read the entity id
				line = f.readline()
				matchObj = re.match( '^ Entity ID[ ]*\: (?P<entityId>[0-9\.]+)', line )
				assert(matchObj)
				entityId = matchObj.group('entityId')
				# print entityId
				# read the sensor type
				line = f.readline()
				matchObj = re.match( '^ Sensor Type[\(\)a-zA-Z ]*\: (?P<sensorType>[a-zA-Z \(\)]+)', line )
				assert(matchObj)
				sensorType = matchObj.group('sensorType')
				#print sensorType
				if sensorType == 'Fan':
					rpms = self.parseFanSensorOutput(f)
					if temperature != None:
						sensor = FanSensor(sensorName)
						sensor.m_rpms = rpms
				elif sensorType == 'Temperature':
					temperature = self.parseTemperatureSensorOutput(f)
					if temperature != None:
						sensor = TemperatureSensor(sensorName)
						sensor.m_temperature = temperature
				else:
					#ignoring other sensors
					sensor = None
				if sensor:
					sensorReadings.addSensor( sensor )
			else:
				None
				#assert(False)
			line = f.readline()
		f.close()
	def parseFanSensorOutput(self, file):
		"""
			reads the fan specific ipdmitool output
		"""
		line = file.readline()
		#print line
		matchObj = re.match( '^ Sensor Reading[ ]*\: (?P<numRpms>[0-9]+) \(\+/\- (?P<rpmsPrecision>[0-9]+)\) RPM', line )
		if(matchObj):
			numRpms = matchObj.group('numRpms')
			#print numRpms
			rpms = float( numRpms )
			return rpms
		else:
			matchObj = re.match( '^ Sensor Reading[ ]*\: Not Present', line )
			assert(matchObj)
			return None
		
	def parseTemperatureSensorOutput(self, file):
		"""
			reads the temperature specific ipdmitool output
		"""
 		# Sensor Reading        : 36 (+/- 0) degrees C
		line = file.readline()
		#print line
		matchObj = re.match( '^ Sensor Reading[ ]*\: (?P<temperature>[0-9]+) \(\+/\- (?P<precision>[0-9]+)\) degrees C', line )
		if(matchObj):
			temperature = matchObj.group('temperature')
			temperature = float( temperature )
			return temperature
		else:
			matchObj = re.match( '^ Sensor Reading[ ]*\: Not Present', line )
			assert(matchObj)
			return None