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')

        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=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()

   

def main():
    answer = 'y'

    while answer == 'y' or answer == 'yes':
        print 'This program draw a bullseye in a graphical window'

        w,h = input('Plese input the size of the graphical window (width,height):')

        if w < 0 or h < 0:
            raise ValueError('Width and Height should be positive')
        elif not isinstance(w,int) or not isinstance(h,int):
            raise TypeError('Width and Height should be integers')

        numBands=input('please enter the desired number of bands in the bullseye:')

        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')

        r=input('please enter the radius of the bullseye:')

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

        print 'Width is %d, and height is %d of graphics window'%(w,h)
        print 'Beginning to draw'

        paper=Canvas(w,h,'white','Bullseye')
        b=Bullseye(numBands,r)

        print 'Moving to the center'
        
        b.move(w/2.0,h/2.0)

        print 'drawing'
        
        paper.add(b)

        answer=raw_input('Whould you like to do it again (Inpuit Y or Yes)?')
        answer.lower()

    print 'Good buy!'

main()