# Bulls eye class
# reference point is the center of the circle, and
# initially it is located at the origin

from cs1graphics import*

class Bullseye(FillableShape):
    def __init__(self,numBands,radius,primary='black',secondary='white'):
        if numBands <= 0:
            raise ValueError('Number of bands must be positive')
        if not isinstance(numBands,int):
            raise TypeError('Wrong type of the number of bands, it must be a positive integer')

        if numBands < 0:
            raise ValueError('The number of bands should be positive')
        elif not isinstance(numBands,int):
            raise TypeError('The number of bands should be integer')

        if radius < 0:
            raise ValueError('The radius should be positive')
        elif not isinstance(radius,int):
            raise TypeError('The radius should be integer')        

        FillableShape.__init__(self) # call constructor of the FillableShape class
        self._outer = Circle(radius) # create the outer circle
        self._outer.setFillColor(primary) # change the fill color to the primary

        if numBands == 1: # if only one band
            self._rest = None # no other parts
        else: #if more than one band, create smaller bullseye
            innerR=int(float(radius)*(numBands-1)/ numBands)
            self._rest = Bullseye(numBands-1,innerR,secondary,primary)

    def getNumBands(self):
        bandcount = 1 # outer band is always present
        if self._rest != 0: # if there are more bands
            bandcount += self._rest.getNumBands()

        return bandcount

    def getRadius(self):
        return radius

    def setColors(self,primary,secondary):
        self._outer.setFillColor(primary)
        if self._rest:
            self._rest.setColors(secondary,primary)

    def _draw(self):
        self._beginDraw()
        self._outer._draw() # draw the outer circle
        if self._rest:
            self._rest._draw() # recursively draw the rest
        self._completeDraw()