import gzip

from collections.abc import MutableMapping

import tkinter as tk

from tkinter import LEFT,N,S,E,W

from colorsys import rgb_to_hsv

from PIL import Image,ImageTk

from analyzer.epoint import EPoint

from analyzer.corners import Corners

class Sampler:

	def __init__(self):

		self.k=0

		self.img=None

		self.photo=None

		self.letter="_"

		self.hsv=(0,0,0)

		self.pos=(0,0)

		self.corners=Corners()

		self._dirty=False

		self._createGUI()

		for c in self.corners:

			(x,y)=(c.x,c.y)

			self.canvas.create_oval(x-2,y-2,x+2,y+2,fill="#00ff00",tags="mark")

		if self.corners.canonizeOrder():

			(a,b,c,d)=self.corners

			self.canvas.create_line(a.x,a.y,b.x,b.y,fill="#00ff00",tags="mark")

			self.canvas.create_line(b.x,b.y,c.x,c.y,fill="#00ff00",tags="mark")

			self.canvas.create_line(c.x,c.y,d.x,d.y,fill="#00ff00",tags="mark")

			self.canvas.create_line(d.x,d.y,a.x,a.y,fill="#00ff00",tags="mark")

class DataFile(MutableMapping):

	def __init__(self,filename):

		self.filename=filename

		try:

			with gzip.open(filename,mode="rt",encoding="utf8") as f:

				self._data=json.load(f,object_hook=self.deserialize)

		except OSError:

			self._data=dict()

	def save(self):

		with gzip.open(self.filename,mode="wt",encoding="utf8") as f:

			json.dump(self._data,f,default=self.serialize,indent="\t")

	def deserialize(self,obj):

		if obj.get("type")!="EPoint": return obj

		return EPoint(*obj["val"])

	def __getitem__(self, key): return self._data[key]

	def __setitem__(self, key, val): self._data[key]=val

	def __delitem__(self, key): del self._data[key]

	def __iter__(self): return iter(self._data)

	def __len__(self): return len(self._data)

s=Sampler()