use bevy_prototype_lyon::prelude::PathBuilder;

use crate::{
    datatypes::{
        angle::{Angle, AngleUnit},
        length::Length,
        Coordinate,
    },
    turtle::Precision,
};

/**
 * All the possibilities to draw something with turtle. All the commands can get the position, heading,
 * color and fill_color from the turtles state.
 */
pub enum MoveCommand {
    Forward(Length),
    Backward(Length),
    Circle { radius: Length, angle: Angle<f32> },
    Goto(Coordinate),
    Home,
}

/// Different ways to drop breadcrumbs on the way like a dot or a stamp of the turtles shape.

pub enum Breadcrumb {
    Dot,
    Stamp,
}

/// Different ways that change the orientation of the turtle.
pub enum OrientationCommand {
    Left(Angle<Precision>),
    Right(Angle<Precision>),
    SetHeading,
    LookAt(Coordinate),
}

/// A combination of all commands that can be used while drawing.
pub enum DrawElement {
    Draw(MoveCommand),
    Move(MoveCommand),
    Orient(OrientationCommand),
    Drip(Breadcrumb),
}

pub enum DrawingSegment {
    Single(DrawElement),
    Outline(Vec<DrawElement>),
    Filled(Vec<DrawElement>),
}

impl DrawingSegment {
    pub fn draw(&self) {
        match self {
            DrawingSegment::Single(elem) => {
                let mut path_builder = PathBuilder::new();
            }
            DrawingSegment::Outline(_) => todo!(),
            DrawingSegment::Filled(_) => todo!(),
        }
    }
}

#[derive(PartialEq, Eq)]
pub enum DrawState {
    PenDown,
    PenUp,
}