#  Copyright (c) 2021-2023, Manfred Moitzi
#  License: MIT License
from __future__ import annotations
from typing import Iterable
from ezdxf.math import Vec2
from .properties import BackendProperties
from .backend import Backend, BkPath2d, BkPoints2d
from .config import Configuration


class BasicBackend(Backend):
    """The basic backend has no draw_path() support and approximates all curves
    by lines.
    """

    def __init__(self):
        super().__init__()
        self.collector = []
        self.configure(Configuration())

    def draw_point(self, pos: Vec2, properties: BackendProperties) -> None:
        self.collector.append(("point", pos, properties))

    def draw_line(self, start: Vec2, end: Vec2, properties: BackendProperties) -> None:
        self.collector.append(("line", start, end, properties))

    def draw_filled_polygon(
        self, points: BkPoints2d, properties: BackendProperties
    ) -> None:
        self.collector.append(("filled_polygon", points, properties))

    def set_background(self, color: str) -> None:
        self.collector.append(("bgcolor", color))

    def clear(self) -> None:
        self.collector = []


class PathBackend(BasicBackend):
    def draw_path(self, path: BkPath2d, properties: BackendProperties) -> None:
        self.collector.append(("path", path, properties))

    def draw_filled_paths(
        self, paths: Iterable[BkPath2d], properties: BackendProperties
    ) -> None:
        self.collector.append(("filled_path", tuple(paths), properties))
