var VNode = require('./vnode');
var is = require('./is');

function addNS(data, children) {
  data.ns = 'http://www.w3.org/2000/svg';
  if (children !== undefined) {
    for (var i = 0; i < children.length; ++i) {
      addNS(children[i].data, children[i].children);
    }
  }
}

module.exports = function h(sel, b, c) {
  var data = {}, children, text, i;
  if (arguments.length === 3) {
    data = b;
    if (is.array(c)) { children = c; }
    else if (is.primitive(c)) { text = c; }
  } else if (arguments.length === 2) {
    if (is.array(b)) { children = b; }
    else if (is.primitive(b)) { text = b; }
    else { data = b; }
  }
  if (is.array(children)) {
    for (i = 0; i < children.length; ++i) {
      if (is.primitive(children[i])) children[i] = VNode(undefined, undefined, undefined, children[i]);
    }
  }
  if (sel[0] === 's' && sel[1] === 'v' && sel[2] === 'g') {
    addNS(data, children);
  }
  return VNode(sel, data, children, text, undefined);
};