"""
Ex 7.3 from "A primer on..."
Extend the parabola class with a term involving a sine 
function and two additional parameters. 
"""


import numpy as np

class Line:
    def __init__(self, c0, c1):
        self.c0, self.c1 = c0, c1

    def __call__(self, x):
        return self.c0 + self.c1*x

    def table(self, L, R, n):
        """Return a table with n points for L <= x <= R."""
        s = ''
        for x in np.linspace(L, R, n):
            y = self(x)
            s += f'{x:12g} {y:12g}\n'
        return s


class Parabola(Line):
    def __init__(self, c0, c1, c2):
        super().__init__(c0, c1)  # Line stores c0, c1
        self.c2 = c2

    def __call__(self, x):
        return super().__call__(x) + self.c2*x**2


class SinPlusQuadratic(Parabola):
    def __init__(self,A,w,a,b,c):
        super().__init__(c,b,a)  #order is opposite of Parabola class, as specified in the question text
        self.A = A
        self.w = w

    def __call__(self, x):
        return super().__call__(x) + self.A*np.sin(self.w*x)
    

s1 = SinPlusQuadratic(1,1,1,1,1)
x = np.pi

print(s1(x))
print(s1.table(-np.pi,np.pi,11))


"""
Terminal> python sin_plus_quadratic.py 
14.011197054679151
    -3.14159      7.72801
    -2.51327      4.21549
    -1.88496      1.71705
    -1.25664     0.371443
   -0.628319      0.17868
           0            1
    0.628319      2.61089
     1.25664      4.78683
     1.88496      7.38907
     2.51327      10.4176
     3.14159      14.0112
"""