import * as d3 from 'd3';
import { Point } from '../types/Point';

abstract class Path {

    abstract angleAlong (t: number, x: d3.ScaleLinear<number, number>, y: d3.ScaleLinear<number, number>): number;
    abstract apply (context: CanvasRenderingContext2D, x: d3.ScaleLinear<number, number>, y: d3.ScaleLinear<number, number>): void;
    abstract pointAlong (t: number, x: d3.ScaleLinear<number, number>, y: d3.ScaleLinear<number, number>): Point;
    abstract points(): Point[];

}

function transformed (p: Point, x: d3.ScaleLinear<number, number>, y: d3.ScaleLinear<number, number>): Point {
    return {
        x: x(p.x) + (p.dx ? p.dx : 0),
        y: y(p.y) + (p.dy ? p.dy : 0)
    };
}

export {
    Path,
    transformed
}