import type { PrePointOnShape } from '../point-on-shape/point-on-shape.js';
import type { Loop } from 'flo-boolean';
import { controlPointLinesLength } from 'flo-bezier3';
import { getCorner } from '../corner/get-corner.js';


/** @internal */
function getDullCornersOnLoop(
        minBezLength: number) {

    return (loop: Loop): PrePointOnShape[] => {
        const dullCorners: PrePointOnShape[] = [];

        for (let i=0; i<loop.curves.length; i++) {
            const curve = loop.curves[i];

            if (controlPointLinesLength(curve.ps) < minBezLength) {
                continue;
            }

            const { next, ps } = curve;

            if (getCorner(ps, next.ps).isQuiteDull) {
                const p = ps[ps.length - 1];
                const pDd = [[0,p[0]], [0,p[1]]];

                dullCorners.push({ curve, t: 1, isSource: true, p, pDd });
                dullCorners.push({ curve: next, t: 0, isSource: true, p, pDd });
            }
        }

        return dullCorners;
    }
}


export { getDullCornersOnLoop }