from migen.fhdl.std import *


class Complex:
    def __init__(self, real, imag):
        self.real = real
        self.imag = imag

    def __neg__(self):
        return Complex(-self.real, -self.imag)

    def __add__(self, other):
        if isinstance(other, Complex):
            return Complex(self.real + other.real, self.imag + other.imag)
        else:
            return Complex(self.real + other, self.imag)
    __radd__ = __add__
    def __sub__(self, other):
        if isinstance(other, Complex):
            return Complex(self.real - other.real, self.imag - other.imag)
        else:
            return Complex(self.real - other, self.imag)
    def __rsub__(self, other):
        if isinstance(other, Complex):
            return Complex(other.real - self.real, other.imag - self.imag)
        else:
            return Complex(other - self.real, -self.imag)
    def __mul__(self, other):
        if isinstance(other, Complex):
            return Complex(self.real*other.real - self.imag*other.imag,
                self.real*other.imag + self.imag*other.real)
        else:
            return Complex(self.real*other, self.imag*other)
    __rmul__ = __mul__

    def __lshift__(self, other):
        return Complex(self.real << other, self.imag << other)
    def __rshift__(self, other):
        return Complex(self.real >> other, self.imag >> other)

    def __repr__(self):
        return repr(self.real) + " + " + repr(self.imag) + "j"

    def eq(self, r):
        if isinstance(r, Complex):
            return self.real.eq(r.real), self.imag.eq(r.imag)
        else:
            return self.real.eq(r), self.imag.eq(0)


def SignalC(*args, **kwargs):
    real = Signal(*args, **kwargs)
    imag = Signal(*args, **kwargs)
    return Complex(real, imag)