from __future__ import annotations

from dataclasses import dataclass
from enum import Enum
from typing import Tuple


class Position(Enum):
    """
    Enum representing the position of an anchor point.
    """

    CENTER = "CENTER"
    CENTER_LEFT = "CENTER_LEFT"
    CENTER_RIGHT = "CENTER_RIGHT"
    TOP_CENTER = "TOP_CENTER"
    TOP_LEFT = "TOP_LEFT"
    TOP_RIGHT = "TOP_RIGHT"
    BOTTOM_LEFT = "BOTTOM_LEFT"
    BOTTOM_CENTER = "BOTTOM_CENTER"
    BOTTOM_RIGHT = "BOTTOM_RIGHT"
    CENTER_OF_MASS = "CENTER_OF_MASS"

    @classmethod
    def list(cls):
        return list(map(lambda c: c.value, cls))


@dataclass
class Point:
    x: float
    y: float

    def as_xy_int_tuple(self) -> Tuple[int, int]:
        return int(self.x), int(self.y)

    def as_xy_float_tuple(self) -> Tuple[float, float]:
        return self.x, self.y


@dataclass
class Vector:
    start: Point
    end: Point

    def is_in(self, point: Point) -> bool:
        v1 = Vector(self.start, self.end)
        v2 = Vector(self.start, point)
        cross_product = (v1.end.x - v1.start.x) * (v2.end.y - v2.start.y) - (
            v1.end.y - v1.start.y
        ) * (v2.end.x - v2.start.x)
        return cross_product < 0


@dataclass
class Rect:
    x: float
    y: float
    width: float
    height: float

    @property
    def top_left(self) -> Point:
        return Point(x=self.x, y=self.y)

    @property
    def bottom_right(self) -> Point:
        return Point(x=self.x + self.width, y=self.y + self.height)

    def pad(self, padding) -> Rect:
        return Rect(
            x=self.x - padding,
            y=self.y - padding,
            width=self.width + 2 * padding,
            height=self.height + 2 * padding,
        )