import colors
from vector import *


class drawable(list):
    """
    Abstract superclass for all objects drawable on canvas.
    A drawable is a list of points ('Vector') with a 'color' attribute.
    """


    def __init__(self, *points, color=colors.BLACK):
        """
        Overrides '__init__' method of 'list' class.
        Will only accept point-like objects and adds 'color' attribute.
        """

        list.__init__(self)
        for point in points:
            drawable.append(self, point)
        self.color = color


    def append(self, item):
        """
        Overrides 'append' method of 'list' class.
        Will only accept point-like objects.
        """

        try:
            list.append(self, Vector(*item))
        except:
            raise TypeError(f"Expected vector/point, but got {item.__class__.__name__}")


    def __str__(self):
        """
        Override '__str__' method of 'list' class.
        Return string with classname, points in 'self' and additional attributes.
        """

        return f"{self.__class__.__name__}({list.__repr__(self)[1:-1]}) with {self.__dict__.__repr__()[1:-1].replace(':', ' =').replace(' ', '')}"


    def __repr__(self):
        """
        Override '__repr__' method of 'list' class.
        Return string with classname, points in 'self' and additional attributes.
        """

        return f"{self.__class__.__name__}({list.__repr__(self)[1:-1]}, {self.__dict__.__repr__()[1:-1].replace(':', ' =').replace(' ', '')})"


    def draw(self, screen, offset):
        """Abstract method to draw 'self' on 'screen'."""
        raise NotImplementedError


    def draw_shadow(self, screen, offset, source, color=(31,31,31)):
        """Abstract method to draw a shadow of 'self' on 'screen'."""
        raise NotImplementedError


    def dist_to(self, source):
        """Abstract method to calculate the distance to the player ('source')."""
        raise NotImplementedError


    def cut(self, source, portal):
        """Abstract method to cut 'self' to fit in the portal view."""
        raise NotImplementedError