import threading
import queue
import json


class NetworkReader(threading.Thread):
	def __init__(self,stream):
		threading.Thread.__init__(self,daemon=True)
		self.parent=threading.current_thread()
		
		self.stream=stream
		self.output=queue.Queue()
		
	def run(self):
		if not self.parent.is_alive(): return
		self.output.put(self.readMsg(),timeout=5)
			
	def readMsg(self):
		data=self.stream.readline()
		if not data: pass # !! raise something
		jsonLength=int(data.split(b":")[1].strip()) # "json-length: length" -> length
		data=self.stream.readline()
		if not data: pass # !! raise something
		binLength=int(data.split(b":")[1].strip()) # "bin-length: length" -> length
		jsonData=self.stream.read(jsonLength)
		jsonData=json.loads(str(jsonData,encoding="utf-8"))
		binData=self.stream.read(binLength)
		
		return (jsonData,binData)
		

class NetworkWriter(threading.Thread):
	def __init__(self,stream):
		threading.Thread.__init__(self,daemon=True)
		self.parent=threading.current_thread()
		
		self.stream=stream
		self.input=queue.Queue()
		
	def run(self):
		if not self.parent.is_alive(): return
		msg=self.input.get(timeout=5)
		if msg is None: return
		self.stream.write(self.prepMsg(msg))
		self.stream.flush()
			
	def prepMsg(self, msg):
		jsonData,binData=msg
		jsonData=bytes(json.dumps(jsonData)+"\n",encoding="utf-8")
		jsonLength=bytes("json-length: "+str(len(jsonData))+"\n",encoding="utf-8")
		binLength=bytes("bin-length: "+str(len(binData))+"\n",encoding="utf-8")
		return b"".join((jsonLength,binLength,jsonData,binData))