import { isPoint } from './is-point.mjs';
import { isPoint3D } from './is-point-3d.mjs';
import { isNum } from './inc.mjs';

const distance1D = (a, b) => Math.abs(a - b);
function distance(a, b) {
    if (isNum(a) && isNum(b)) {
        return distance1D(a, b);
    }
    else if (isPoint(a) && isPoint(b)) {
        const xDelta = distance1D(a.x, b.x);
        const yDelta = distance1D(a.y, b.y);
        const zDelta = isPoint3D(a) && isPoint3D(b) ? distance1D(a.z, b.z) : 0;
        return Math.sqrt(Math.pow(xDelta, 2) + Math.pow(yDelta, 2) + Math.pow(zDelta, 2));
    }
}

export { distance };