import os
import multiprocessing
import threading
import logging as log
import PIL
from util import MsgQueue
from gui import gui
from imageanalyzer import ImageAnalyzer
from go import Go


class Core:
	def __init__(self):
		self.grid=None
		self.go=Go()
		self.detector=ImageAnalyzer()
		self.tresW=60.0
		self.tresB=30.0

		self._ownMessages=MsgQueue(self._handleEvent)
		self._guiMessages=MsgQueue()

		imgPath=os.path.join(os.path.dirname(__file__), "..","images","5.jpg")
		self._frame=PIL.Image.open(imgPath)

		self._guiProc=multiprocessing.Process(name="gui", target=gui, args=(self._guiMessages,self._ownMessages))
		self._guiProc.start()
		self._guiMessages.send("setCurrentFrame",(self._frame.copy(),))

	def setCorners(self,corners):
		self.detector.setGridCorners(corners)
		self.detector.analyze(self._frame)
		self._guiMessages.send("setGameState",(self.detector.board,))

	def setTresholds(self,tresB=None,tresW=None):
		if tresB is not None: self.tresB=tresB
		if tresW is not None: self.tresW=tresW
		if self.detector.analyze(self._frame):
			self._guiMessages.send("setGameState",(self.detector.board,))

	def listen(self):
		listenerThread=threading.Thread(target=lambda: self._ownMessages.listen())
		listenerThread.start()

	def joinGui(self):
		self._guiProc.join()
		self._ownMessages.send("!kill")

	def _handleEvent(self,e):
		actions={"setCorners":self.setCorners, "setTresholds":self.setTresholds}
		(actionName,args,kwargs)=e

		return actions[actionName](*args,**kwargs)

core=Core()
core.listen()
core.joinGui()

"""
core
====
grid
go
imageAnalyzer


gui
===
corners

a) keeps references to important objects and uses them
b) gets and sets all relevant data through method calls with core

GUI
<- addCorner(corner)
-> redrawImgView(img,grid)
<- refreshTresholds(tresB,tresW)

BoardView
-> redrawState(go)


core-gui: just pass messages with relevant data (!! always pass object copies, don't share instances)
"""