/* global HTMLHint */

/* eslint no-magic-numbers: ["error", { "ignore": [0, 1] }] */

HTMLHint.addRule({

	id: 'kses',

	description: 'Element or attribute cannot be used.',

	init: function( parser, reporter, options ) {

		'use strict';

		var self = this;

		parser.addListener( 'tagstart', function( event ) {

			var attr, col, attrName, allowedAttributes, i, len, tagName;

			tagName = event.tagName.toLowerCase();

			if ( ! options[ tagName ] ) {

				reporter.error( 'Tag <' + event.tagName + '> is not allowed.', event.line, event.col, self, event.raw );

				return;

			}

			allowedAttributes = options[ tagName ];

			col = event.col + event.tagName.length + 1;

			for ( i = 0, len = event.attrs.length; i < len; i++ ) {

				attr = event.attrs[ i ];

				attrName = attr.name.toLowerCase();

				if ( ! allowedAttributes[ attrName ] ) {

					reporter.error( 'Tag attribute [' + attr.raw + ' ] is not allowed.', event.line, col + attr.index, self, attr.raw );

				}

			}

		});

	}

});