import tkinter as tk
from PIL import ImageTk
import PIL
import math
from epoint import *
from corners import *
from grid import *
from image_analyzer import *
from go import *


class Application(tk.Frame):
  def __init__(self, master=None):
    self.corners=Corners()
    self.boardGrid=None
    
    tk.Frame.__init__(self, master)
    self.grid(column=0,row=0)
    self.createWidgets()

  def createWidgets(self):
    # a captured frame with overlay graphics
    self.imgView=tk.Canvas(self)
    self.imgView.configure(width=480,height=360)
    self.imgOrig=PIL.Image.open("../images/7.jpg")
    
    self.img=ImageTk.PhotoImage(self.imgOrig.resize((int(self.imgView['width']),int(self.imgView['height'])),resample=PIL.Image.BILINEAR))
    
    self.imgView.bind('<1>',lambda e: self.addCorner(e.x,e.y))
    
    self.imgView.grid(column=0,row=0)
    
    # board with detected stones
    self.boardView=BoardView(self)
    self.boardView.grid(column=1,row=0)

    # more controls below the board
    self.scaleTresB=tk.Scale(self, orient=tk.HORIZONTAL, length=200, from_=0.0, to=100.0, command=lambda x: self.redrawImgView())
    self.scaleTresW=tk.Scale(self, orient=tk.HORIZONTAL, length=200, from_=0.0, to=100.0, command=lambda x: self.redrawImgView())
    self.scaleTresB.set(30.0)
    self.scaleTresW.set(60.0)
    self.scaleTresB.grid(column=0,row=1,columnspan=2)
    self.scaleTresW.grid(column=0,row=2,columnspan=2)

    # render everything
    self.redrawImgView()
  
  ## Stores a grid corner located at x,y coordinates.
  def addCorner(self,x,y):
    self.corners.add(x,y)
    if self.corners.canonizeOrder():
      self.boardGrid=Grid(self.corners)
      self.boardView.setBoardGrid(self.boardGrid)
    
    self.redrawImgView()
    
  ## Redraws the current image and its overlay.
  def redrawImgView(self):
    self.imgView.create_image(2,2,anchor="nw",image=self.img)
    for corner in self.corners.corners:
      self.markPoint(corner.x,corner.y)
    
    if self.boardGrid!=None:
      for r in range(19):
        a=self.boardGrid.intersections[r][0]
        b=self.boardGrid.intersections[r][-1]
        self.imgView.create_line(a.x,a.y,b.x,b.y,fill='#00ff00')
      for c in range(19):
        a=self.boardGrid.intersections[0][c]
        b=self.boardGrid.intersections[-1][c]
        self.imgView.create_line(a.x,a.y,b.x,b.y,fill='#00ff00')
    
    self.imgView.grid()
    
    origWidth,origHeight=self.imgOrig.size
    widthRatio=origWidth/self.img.width()
    heightRatio=origHeight/self.img.height()
    sizeCoef=max(widthRatio,heightRatio)
    tresB=self.scaleTresB.get()
    tresW=self.scaleTresW.get()
    
    shift=EPoint(origWidth-self.img.width()*sizeCoef,origHeight-self.img.height()*sizeCoef)/2
    
    self.boardView.redrawState(self.imgOrig,sizeCoef,shift,tresB,tresW)
    
  ## Marks a point at the image with a green cross. Used for corners.
  def markPoint(self,x,y):
    self.imgView.create_line(x-3,y-3,x+4,y+4,fill="#00ff00")
    self.imgView.create_line(x-3,y+3,x+4,y-4,fill="#00ff00")
    
    self.imgView.grid()


## Handles and presents the game state as detected by the program.   
class BoardView(tk.Canvas):
  def __init__(self, master=None):
    self.detector=ImageAnalyzer()
    self.boardGrid=None
    
    tk.Canvas.__init__(self, master)
    self.configure(width=360,height=360,background="#ffcc00")
    
    self.drawGrid()
    
    self.grid()

  ## Redraws and reananalyzes the board view.
  #
  # @param tresB upper intensity treshold for a pixel to be considered black, [0-100]
  # @param tresW lower intensity treshold for a pixel to be considered white, [0-100]
  def redrawState(self,img,sizeCoef,shift,tresB,tresW):
    self.detector.analyze(img,tresB,tresW,sizeCoef,shift)
    
    for r,row in enumerate(self.detector.board):
      for c,point in enumerate(row):
        self.drawStone(r,c,point)
        
    self.grid()
    
  def drawGrid(self):
    for i in range(19):
      self.create_line(18,18*(i+1),360-18,18*(i+1),fill="#000000") # rows
      self.create_line(18*(i+1),18,18*(i+1),360-18,fill="#000000") # cols
      
    self.drawStars()
      
  def drawStars(self):
    for r in range(4,19,6):
      for c in range(4,19,6):
        self.create_oval(r*18-2,c*18-2,r*18+2,c*18+2,fill='#000000')
      
  ## Draws a stone at provided coordinates.
  #  
  #  For an unknown color draws nothing and returns False.
  #  
  #  @param r row coordinate, [0-18], counted from top
  #  @param c column coordinate, [0-18], counted from left
  #  @param color color indicator, Go.BLACK or Go.WHITE
  def drawStone(self,r,c,color):
    if color==Go.BLACK: hexCode='#000000'
    elif color==Go.WHITE: hexCode='#ffffff'
    else: return False
    r+=1
    c+=1
    self.create_oval(c*18-9,r*18-9,c*18+9,r*18+9,fill=hexCode)
    
  def setBoardGrid(self,boardGrid):
    self.boardGrid=boardGrid
    self.detector.setGrid(boardGrid)


root = tk.Tk()
app = Application(master=root)
app.mainloop()