'use strict';

var fs = require('fs');

function assert(name, condition) {
    if (!condition) {
        throw new Error('FAILED: ' + name);
    }
    console.log('OK:', name);
}

function read(path) {
    return fs.readFileSync(path, 'utf8');
}

function validatePreview(path) {
    var html = read(path);
    var start = html.indexOf('<script>');
    var end = html.indexOf('</script>', start);
    assert(path + ' contains script', start >= 0 && end > start);
    new Function(html.substring(start + 8, end));
    assert(path + ' script syntax', true);
    assert(path + ' uses production CSS', html.indexOf('../classic/megamenu-classic.css') >= 0);
    assert(path + ' has mobile toggle', html.indexOf('mega-menu-mobile-toggle') >= 0);
    assert(path + ' has accessible submenu toggle', html.indexOf('menu-item-toggle') >= 0 && html.indexOf('aria-controls') >= 0);
}

function validateStyle(path) {
    var css = read(path);
    var opening = (css.match(/\{/g) || []).length;
    var closing = (css.match(/\}/g) || []).length;
    assert(path + ' balanced blocks', opening === closing);
    ['mega-menu-mobile-toggle', 'menu-item-toggle', 'flyout-toggle', 'mega-menu-description'].forEach(function (className) {
        assert(path + ' contains ' + className, css.indexOf(className) >= 0);
    });
}

validatePreview('preview/mega-menu-preview.html');
validatePreview('preview/flyout-menu-preview.html');
validateStyle('classic/megamenu-classic.css');
validateStyle('src/extensions/megaMenu/MegaMenu.module.scss');

var modernStyles = read('src/extensions/megaMenu/MegaMenu.module.scss');
[
    'white',
    'neutralLighter',
    'neutralLight',
    'neutralTertiary',
    'neutralSecondary',
    'neutralPrimary',
    'themePrimary',
    'themeDark',
    'themeLighterAlt'
].forEach(function (themeSlot) {
    assert('modern styles use SharePoint theme slot ' + themeSlot,
        modernStyles.indexOf('[theme: ' + themeSlot + ', default:') >= 0);
});

console.log('Static MegaMenu asset tests passed.');