import tkinter as tk
from tkinter import ttk
from PIL import Image, ImageDraw, ImageChops

from .base import View

class NumberCircleView(View):

    def _init_ui(self):
        self.target_frame = tk.Frame(self.actions)
        self.target_frame.pack()
        self.target_label = ttk.Label(self.target_frame, text="Target (g)")
        self.target_label.pack(side=tk.LEFT)
        self.target = ttk.Entry(self.target_frame)
        self.target.insert(0, 100.0)
        self.target.pack(side=tk.LEFT)
    
    def _init_im(self):
        im = Image.new('1', self.size, 'white')
        draw = ImageDraw.Draw(im)
        self.target_r = min(self.center)-10
        draw.circle(self.center, self.target_r,
                     outline="#000000")
        return im

    def update_weight(self, weight):
        weight_radius = 0.0
        bkg_im = self.bkg_im.copy()
        draw = ImageDraw.Draw(bkg_im)
        draw.text((50, 68), f"{weight:.1f} g",
                     fill='black', font_size=24)

        try:
            target = float(self.target.get())
            weight_radius = weight / target * self.target_r

            circle_im = Image.new('1', self.size, 'black')
            circle_draw = ImageDraw.Draw(circle_im)

            if weight_radius > 0.1:
                circle_draw.circle(self.center, weight_radius, fill="#FFFFFF")
            
                return ImageChops.logical_xor(bkg_im, circle_im)

        except Exception as e:
            print('Invalid target value:', e)
            pass
        return bkg_im