"use strict";

const HTML5_ELEMENTS = [
  'a',        'abbr',     'address',  'area',     'article',    'aside',
  'audio',    'b',        'base',     'bdi',      'bdo',        'blockquote',
  'body',     'br',       'button',   'canvas',   'caption',    'cite',
  'code',     'col',      'colgroup', 'data',     'datalist',   'dd',
  'del',      'details',  'dfn',      'dialog',   'div',        'dl',
  'dt',       'em',       'embed',    'fieldset', 'figcaption', 'figure',
  'footer',   'form',     'h1',       'h2',       'h3',         'h4',
  'h5',       'h6',       'head',     'header',   'hr',         'html',
  'i',        'iframe',   'img',      'input',    'ins',        'kbd',
  'label',    'legend',   'li',       'link',     'main',       'map',
  'mark',     'menu',     'meta',     'meter',    'nav',        'noscript',
  'object',   'ol',       'optgroup', 'option',   'output',     'p',
  'param',    'pre',      'progress', 'q',        'rp',         'rt',
  'ruby',     's',        'samp',     'script',   'section',    'select',
  'slot',     'small',    'source',   'span',     'strong',     'style',
  'sub',      'sup',      'summary',  'table',    'tbody',      'td',
  'template', 'textarea', 'tfoot',    'th',       'thead',      'time',
  'title',    'tr',       'track',    'u',        'ul',         'var',
  'video',    'wbr'
];

// only void (without end tag) HTML5 elements
var HTML5_VOID_ELEMENTS = [
  'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'link', 'meta',
  'param', 'source', 'track', 'wbr'
];

// https://html.spec.whatwg.org/multipage/multipage/forms.html#form-associated-element
var HTML5_FORM_ASSOCIATED_ELEMENTS = [ 'button', 'fieldset', 'input',
        'object', 'output', 'select', 'textarea' ];

const HTML5_SHADOW_ALLOWED_ELEMENTS = [
  'article', 'aside', 'blockquote', 'body', 'div', 'footer', 'h1', 'h2', 'h3',
  'h4', 'h5', 'h6', 'header', 'main', 'nav', 'p', 'section', 'span'
];

const HTML5_SHADOW_DISALLOWED_ELEMENTS =
    HTML5_ELEMENTS.filter(el => !HTML5_SHADOW_ALLOWED_ELEMENTS.includes(el));

// These are *deprecated/removed* HTML5 element names.
const HTML5_DEPRECATED_ELEMENTS = [
  'acronym',  'applet',  'basefont', 'bgsound',  'big',       'blink',
  'center',   'command', 'content',  'dir',      'font',      'frame',
  'frameset', 'hgroup',  'image',    'isindex',  'keygen',    'marquee',
  'menuitem', 'nobr',    'noembed',  'noframes', 'plaintext', 'rb',
  'rtc',      'shadow',  'spacer',   'strike',   'tt',        'xmp'
];

function newDocument() {
    var d = document.implementation.createDocument();
    return d;
}

function newHTMLDocument() {
    var d = document.implementation.createHTMLDocument('Test Document');
    return d;
}

function newXHTMLDocument() {
    var doctype = document.implementation.createDocumentType('html',
            '-//W3C//DTD XHTML 1.0 Transitional//EN',
            'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd');

    var d = document.implementation.createDocument(
            'http://www.w3.org/1999/xhtml', 'html', doctype);
    return d;
}

function newIFrame(context, src) {
    if (typeof (context) === 'undefined'
            || typeof (context.iframes) !== 'object') {
        assert_unreached('Illegal context object in newIFrame');
    }

    var iframe = document.createElement('iframe');

    if (typeof (src) != 'undefined') {
        iframe.src = src;
    }
    document.body.appendChild(iframe);
    context.iframes.push(iframe);

    assert_true(typeof (iframe.contentWindow) != 'undefined'
            && typeof (iframe.contentWindow.document) != 'undefined'
            && iframe.contentWindow.document != document,
            'Failed to create new rendered document');
    return iframe;
}

function newRenderedHTMLDocument(context) {
    var frame = newIFrame(context);
    var d = frame.contentWindow.document;
    return d;
}

function newContext() {
    return {
        iframes : []
    };
}

function cleanContext(context) {
    context.iframes.forEach(function(e) {
        e.parentNode.removeChild(e);
    });
}

// run given test function in context
// the context is cleaned up after test completes.
function inContext(f) {
    return function() {
        var context = newContext();
        try {
            f(context);
        } finally {
            cleanContext(context);
        }
    };
}

// new context and iframe are created and url (if supplied) is asigned to
// iframe.src
// function f is bound to the iframe onload event or executed directly after
// iframe creation
// the context is passed to function as argument
function testInIFrame(url, f, testName, testProps) {
    if (url) {
        var t = async_test(testName);
        t.step(function() {
            var context = newContext();
            var iframe = newIFrame(context, url);
            iframe.onload = t.step_func(function() {
                try {
                    f(context);
                    t.done();
                } finally {
                    cleanContext(context);
                }
            });
        });
    } else {
        test(inContext(function(context) {
            newRenderedHTMLDocument(context);
            f(context);
        }), testName);
    }
}

function assert_nodelist_contents_equal_noorder(actual, expected, message) {
    assert_equals(actual.length, expected.length, message);
    var used = [];
    for ( var i = 0; i < expected.length; i++) {
        used.push(false);
    }
    for (i = 0; i < expected.length; i++) {
        var found = false;
        for ( var j = 0; j < actual.length; j++) {
            if (used[j] == false && expected[i] == actual[j]) {
                used[j] = true;
                found = true;
                break;
            }
        }
        if (!found) {
            assert_unreached(message + ". Fail reason:  element not found: "
                    + expected[i]);
        }
    }
}

function isVoidElement(elementName) {
    return HTML5_VOID_ELEMENTS.indexOf(elementName) >= 0;
}

function checkTemplateContent(d, obj, html, id, nodeName) {

    obj.innerHTML = '<template id="tmpl">' + html + '</template>';

    var t = d.querySelector('#tmpl');

    if (id != null) {
        assert_equals(t.content.childNodes.length, 1, 'Element ' + nodeName
                + ' should present among template nodes');
        assert_equals(t.content.firstChild.id, id, 'Wrong element ID');
    }
    if (nodeName != null) {
        assert_equals(t.content.firstChild.nodeName, nodeName.toUpperCase(),
                'Wrong node name');
    }
}

function checkBodyTemplateContent(d, html, id, nodeName) {
    checkTemplateContent(d, d.body, html, id, nodeName);
}

function checkHeadTemplateContent(d, html, id, nodeName) {
    checkTemplateContent(d, d.head, html, id, nodeName);
}