#!/usr/bin/env python3
import math
import matplotlib.pyplot as plt
import numpy as np


#  def graphic(x: int, y: int) -> None:
class graphic():
    def __init__(self, x = 0, y = 0):
        self.px: float = x
        self.py: float = y

    def run(self):
        # calculate dot
        x,y = self.px, self.py
        self.in_graph = ((y - 4/x <= 0) and ( y + 4/x >= 0 )) - ( x**1 + y**2 - 25 <= 0 )

        self.fig = plt.figure()
        ax = self.fig.add_subplot(111,aspect='equal')

        # draw curle
        def xy(r,phi):
          return r*np.cos(phi), r*np.sin(phi)

        phis=np.arange(0,6.28,0.01)
        r = 5.
        ax.plot( *xy(r,phis), c='k',ls='-' )
        # TODO: add scaler to menu
        ax.set(xlim=(-5,10), ylim=(-10,10))


        Nx = 1000
        x = np.linspace(0,50,Nx)
        y = np.sqrt(x)

        max_x = 10

        plt.plot(np.linspace(0, max_x, Nx),
            np.divide(4, np.linspace(0, -1*max_x, Nx)),
            color='k'
            )

        plt.plot(np.linspace(0, max_x, Nx),
            np.divide(4, np.linspace(0, max_x, Nx)),
            color= 'k'
            )

        plt.plot( np.linspace(0, 0, Nx),
            np.linspace(5,max_x, Nx),
            color= 'k'
            )

        plt.plot( np.linspace(0, 0, Nx),
            np.linspace(-5,-max_x, Nx),
            color= 'k'
            )



        #  plt.plot(
            #  np.linspace(max_x, max_x, Nx),
            #  np.linspace(0, math.sqrt(max_x), Nx),
            #  color= 'k'
            #  )

        # fill color

        x = np.arange(0,max_x, max_x / Nx )

        c1 = 5 * np.cos ( np.arcsin( x / 5 ) )
        c2 =-5 * np.cos ( np.arcsin( x / 5 ) )
        s1 = 4 / x
        s2 =-4 / x

        #nx = np.arange(-4.93383413607785, -0.810728510460184, max_x / Nx )

        #nc1 = 5 * np.cos ( np.arcsin( nx / 5 ) )
        #nc2 =-5 * np.cos ( np.arcsin( nx / 5 ) )
        #ns1 = 4 / nx
        #ns2 =-4 / nx

        #  c2 = -1 * np.cos ( np.arcsin( x / 2 - 1 ) )
        #  l = x * 0

        color = "gray"

        ax.fill_between(x, c1, s1 , color=color)
        ax.fill_between(x, s2, c2 , color=color)


        x = np.arange(5,max_x, max_x / Nx )
        s1 = 4 / x
        s2 =-4 / x

        ax.fill_between(x, s1, s2 , color=color)


        #ax.fill_between(x, c1, s1 , color=color)
        #ax.fill_between(x, s2, c2 , color=color)

        #  ax.fill_between( x, c2, l , color=color)

        #  x = np.arange(4,max_x, max_x / Nx )
        #  s = np.sqrt( x )
        #  l = x * 0

        #  ax.fill_between( x, l, s , color=color)

        # draw dot
        point_color = 'b' if self.in_graph else 'r'
        plt.plot( self.px ,self.py, color=point_color, marker = 'o', markersize = 10 )

        plt.show()

    def close(self):
        plt.close()


    def status(self) -> bool:
        if self.in_graph:
            return True
        return False