export class DOMEditor
{
  static nodeListToArray( list:NodeList )
  { 
    return Array.prototype.slice.call( list );
  }

  static prefixData( source:string ) 
  {
    let singleReplaceRegex = /\[\s*-/g;
    source = source.replace(singleReplaceRegex, "[data-");
    let autoDataExtensionRegex = /\[(?!data-|([a-zA-Z0-9]+s*(\=|\~|\||\^|\$|\*|\])))/g;
    return source.replace( autoDataExtensionRegex, "[data-" );
  }

  static copyAttribute( destination:Element, source:Element, sourceAttribute:string) 
  {
    sourceAttribute = DOMEditor.prefixData( sourceAttribute );
    let value = source.getAttribute (sourceAttribute );
    destination.setAttribute( sourceAttribute, value );
  }

  static copyAllAttributesThroughRawHTML( source:Element, destination:Element )
  {
    let attributes:[string,string][] = [];

    for ( let i = 0; i < destination.attributes.length; i++ )
    {
      let attribute = destination.attributes[ i ];
      let attributeName = attribute.nodeName;
      let attributeValue = attribute.nodeValue;

      attributes.push( [ attributeName, attributeValue ] );
    }

    for ( let i = 0; i < source.attributes.length; i++ )
    {
      let attribute = source.attributes[ i ];
      let attributeName = attribute.nodeName;
      let attributeValue = attribute.nodeValue;

      let index = attributes.findIndex( a => a[ 0 ] === attributeName );
      
      if ( index === -1 )
      {
        attributes.push( [ attributeName, attributeValue ] );
      }
      else
      {
        attributes[ index ][ 1 ] = attributeValue;
      }
    } 

    let innerHTML = destination.innerHTML;
    let attributesString = "";

    for ( let i = 0; i < attributes.length; i++ )
    {
      if ( i !== 0 ){ attributesString += " "; }

      let attribute = attributes[ i ];
      attributesString += `${attribute[ 0 ]}="${attribute[ 1 ]}"`;
    }

    let tag = destination.nodeName.toLowerCase();

    let html = `<${tag} ${attributesString}>${innerHTML}</${tag}>`;

    console.log( "Copied html:", html );

    destination.outerHTML = html;

    return destination;

  }

  static copyAllAttributes( source:Element, destination:Element )
  {
    for ( let i = 0; i < source.attributes.length; i++ )
    {
      let attribute = source.attributes[ i ];
      let attributeName = attribute.nodeName;
      let attributeValue = attribute.nodeValue;      
      destination.setAttribute( attributeName, attributeValue );
    }
  }

  static cloneChildren( element:Element ):Node[]
  {
    let clones:Node[] = [];

    for ( let i = 0; i < element.childNodes.length; i++ )
    {
      
      clones.push( element.childNodes[ i ].cloneNode( true ) );
    }

    
    return clones;
  }

  static _cssCreationRegex:RegExp;

  static get cssCreationRegex() 
  {
    if ( DOMEditor._cssCreationRegex) 
    {
      return DOMEditor._cssCreationRegex;
    }

    let cssCreationRules = [
      //"Attribute",
      /\[\s*(?:\w|-)+\s*(?:(?:\~|\||\^|\$|\*)?=)\s*(?:(?:"(?:\\"|.)*?")|(?:'(?:\\'|.)*?')|(?:(?:\w|-)+))\s*\]/,
      //"ID",
      /#(?:\w|-)+/,
      //"Class",
      /\.(?:\w|-)+/,
      //"Empty Attribute",
      /\[\s*(?:\w|-)+\s*]/,
      //"Element",
      /(?:\w|-)+/
    ];

    let regexString = "";

    for (let i = 0; i < cssCreationRules.length; i++) 
    {
      if (i !== 0) 
      {
        regexString += "|";
      }

      regexString += "(" + cssCreationRules[i].source + ")";
    }

    DOMEditor._cssCreationRegex = new RegExp(regexString, "g");

    return DOMEditor._cssCreationRegex;
  }

  static stringToDocument( html:string ):Document
  {    
    let parser = new DOMParser();
    let doc = parser.parseFromString( html, "text/html" );
    return doc;    
  }

  static remove( node:Node )
  {
    if ( ! node )
    {
      return;
    }

    if ( ! node.parentNode )
    {
      return;
    }

    node.parentNode.removeChild( node );
  }
}