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use crate::Address;
use crate::ColorAddress;

use StepType::*;

#[derive(Debug, Copy, Clone, PartialEq)]
pub struct Stroker {
	pub pattern: Address,
	/// stroke width = stack[w].x + stack[w].y
	pub width: Address,
	pub color: ColorAddress,
}

#[derive(Debug, Copy, Clone, PartialEq)]
pub struct Triangle {
	pub points: [Address; 3],
	pub colors: [ColorAddress; 3],
}

#[derive(Debug, Copy, Clone, PartialEq)]
pub enum StepType {
	Arc,
	CubicCurve,
	QuadraticCurve,
	Line,
}

pub type TriangleIndex = usize;
pub type StepIndex = usize;
pub type Path = Vec<(StepType, StepIndex)>;
pub type PathIndex = usize;
pub type Background = Vec<TriangleIndex>;
pub type BackgroundIndex = usize;
pub type StrokerIndex = usize;

#[derive(Debug, Copy, Clone, PartialEq)]
pub enum RenderingStep {
	Clip(PathIndex, BackgroundIndex),
	Stroke(PathIndex, StrokerIndex),
}

pub const STEP_TYPES: [StepType; 4] = [
	Arc,
	CubicCurve,
	QuadraticCurve,
	Line,
];

impl StepType {
	pub fn as_u32(self) -> u32 {
		match self {
			Arc => 0,
			CubicCurve => 1,
			QuadraticCurve => 2,
			Line => 3,
		}
	}
}