"use strict";
  const xnv = require("xml-name-validator");
  const DOMException = require("domexception/webidl2js-wrapper");
  const { XML_NS, XMLNS_NS } = require("./namespaces");
  
  // https://dom.spec.whatwg.org/#validate
  
  exports.name = function (globalObject, name) {
    const result = xnv.name(name);
    if (!result.success) {
      throw DOMException.create(globalObject, [
        "\"" + name + "\" did not match the Name production: " + result.error,
        "InvalidCharacterError"
      ]);
    }
  };
  
  exports.qname = function (globalObject, qname) {
    exports.name(globalObject, qname);
  
    const result = xnv.qname(qname);
    if (!result.success) {
      throw DOMException.create(globalObject, [
        "\"" + qname + "\" did not match the QName production: " + result.error,
        "InvalidCharacterError"
      ]);
    }
  };
  
  exports.validateAndExtract = function (globalObject, namespace, qualifiedName) {
    if (namespace === "") {
      namespace = null;
    }
  
    exports.qname(globalObject, qualifiedName);
  
    let prefix = null;
    let localName = qualifiedName;
  
    const colonIndex = qualifiedName.indexOf(":");
    if (colonIndex !== -1) {
      prefix = qualifiedName.substring(0, colonIndex);
      localName = qualifiedName.substring(colonIndex + 1);
    }
  
    if (prefix !== null && namespace === null) {
      throw DOMException.create(globalObject, [
        "A namespace was given but a prefix was also extracted from the qualifiedName",
        "NamespaceError"
      ]);
    }
  
    if (prefix === "xml" && namespace !== XML_NS) {
      throw DOMException.create(globalObject, [
        "A prefix of \"xml\" was given but the namespace was not the XML namespace",
        "NamespaceError"
      ]);
    }
  
    if ((qualifiedName === "xmlns" || prefix === "xmlns") && namespace !== XMLNS_NS) {
      throw DOMException.create(globalObject, [
        "A prefix or qualifiedName of \"xmlns\" was given but the namespace was not the XMLNS namespace",
        "NamespaceError"
      ]);
    }
  
    if (namespace === XMLNS_NS && qualifiedName !== "xmlns" && prefix !== "xmlns") {
      throw DOMException.create(globalObject, [
        "The XMLNS namespace was given but neither the prefix nor qualifiedName was \"xmlns\"",
        "NamespaceError"
      ]);
    }
  
    return { namespace, prefix, localName };
  };