import tkinter as tk
from tkinter import ttk

from .base import View

class CircleView(View):

    def _init_canvas(self):
        self.target_r = self.center[0] - 10
        self.draw_circle(self.center[0], self.center[1],
                         self.target_r,
                         outline="#000000")
        
        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 draw_circle(self, x, y, r, **kwargs):
        self.canvas.create_oval(x-r, y-r, x+r, y+r, **kwargs)
    
    def update_weight(self, weight):
        self.canvas.delete("all")

        weight_r = 0.0
        try:
            target = float(self.target.get())
            weight_r = weight / target * self.target_r

            self.draw_circle(self.center[0], self.center[1],
                            weight_r,
                            fill="#000000")
        except:
            pass
        finally:
            target_outline = "#000000"
            if weight_r > self.target_r:
                target_outline = "#FFFFFF"
            self.draw_circle(self.center[0], self.center[1],
                            self.target_r,
                            outline=target_outline)