import { DEFAULT_CLASS } from './default-class.js';
import { crossHair } from './cross-hair.js';
import { bezier } from './bezier.js';
import { evaluateBezier } from './evaluate-bezier.js';
import { bezierFromBezierPiece } from './bezier-from-bezier-piece.js';


/**
 * Draws a bezier piece, i.e. a bezier within a specified t range.
 * @param snap 
 * @param bezierPiece 
 * @param class 
 * @param delay 
 */
function bezierPiece(
        g      : SVGGElement,
        ps_    : number[][],
        tRange : number[],
        class_ : string = DEFAULT_CLASS,
        delay? : number) {

    const $elems: SVGElement[] = (tRange[0] === tRange[1])
          // Draw crosshair if t range bounds are equal.
        ? crossHair(g, evaluateBezier(ps_, tRange[0]), class_, 1.5)
        : bezier(g, bezierFromBezierPiece(ps_, tRange), class_)

    if (delay) { 
        setTimeout(() => $elems.forEach(e => e.remove()), delay);
    }

    return $elems;
}


export { bezierPiece }