# -*- coding: utf-8 -*-

"""
scenegraph.element.rectangle
"""


# imports ####################################################################

from .path import Path


# rectangle ##################################################################

class Rectangle(Path):
    tag = "rect"
    
    width, height = 0, 0
    rx, ry = None, None
    
    @property
    def d(self):
        w, h = self.width, self.height
        if w <= 0. or h <= 0.:
            return []
        
        rx, ry = self.rx, self.ry
        if rx is None and ry is None:
            return ['M', (0, 0), 'l', (0,  h),
                    'l', (w, 0), 'l', (0, -h), 'z']
        
        if rx is None:
            rx = ry
        if ry is None:
            ry = rx
        
        rx, ry = min(rx, w / 2.), min(ry, h / 2.)
        
        return ['M', (0, ry),
                'L', (0, h - ry), 'A', (rx, ry), 0, (0, 0), (rx, h),
                'L', (w - rx, h), 'A', (rx, ry), 0, (0, 0), (w, h - ry),
                'L', (w, ry),     'A', (rx, ry), 0, (0, 0), (w - rx, 0),
                'L', (rx, 0),     'A', (rx, ry), 0, (0, 0), (0, ry),
                'Z']