import { euclidean } from "../metrics/index";

import { Matrix } from "../matrix/index";

//import { neumair_sum } from "../numerical/index";

export default function(v, metric = euclidean) {

//export default function(vector, p=2, metric = euclidean) {

let vector = null;

if (v instanceof Matrix) {

let [rows, cols] = v.shape;

if (rows === 1) vector = v.row(0);

else if (cols === 1) vector = v.col(0);

else throw "matrix must be 1d!"

} else {

vector = v;

}

let n = vector.length;

let z = new Array(n)

z.fill(0);

return metric(vector, z);

/*let v;

if (vector instanceof Matrix) {

let [ rows, cols ] = v.shape;

if (rows === 1) {

v = vector.row(0);

} else if (cols === 1) {

v = vector.col(0);

} else {

throw "matrix must be 1d"

}

} else {

v = vector;

}

return Math.pow(neumair_sum(v.map(e => Math.pow(e, p))), 1 / p)*/

}