// ==UserScript==
// @name         avecrypto
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       anonymousse
// @match        https://avenoel.org/*
// @exclude      https://avenoel.org/chat*
// @exclude      https://avenoel.org/admin*
// @grant        none
// ==/UserScript==

const START_DELIMITER = '#secret#start#';
const END_DELIMITER = '#secret#end#';
const EQUAL_SUBSTITUTOR = '#equal#';
const SUBSTITUTORS = [
    ['=', '#EQUAL#'],
    ['+', '#PLUS#'],
    ['/', '#SLASH#'],
];

const CRYPTO_REGEXP = new RegExp(`${START_DELIMITER}([a-zA-Z0-9#]+)${END_DELIMITER}`);

function getSelection (field) {
    return field.value.substring(field.selectionStart, field.selectionEnd);
}

function replaceSelection (field, new_value) {
    field.value = [field.value.slice(0, field.selectionStart), new_value, field.value.slice(field.selectionEnd)].join('');
}

(function() {
    'use strict';

    let bbcodes = $('.bbcodes');

    let button = $('<button type="button" class="btn" tabindex="-1" href="#">');
    let img = $('<img src="https://avenoel.org/images/smilies/724771109.gif">');

    img.appendTo(button);

    button.click(function () {
        let field = $(this).closest('form').find('textarea')[0];

        console.log(field);
        if (field.selectionStart === field.selectionEnd) {
            return ;
        }
        let msg = getSelection(field);
        let encoded = SUBSTITUTORS.reduce((acc, v) => acc.replace(new RegExp(v[0], 'g'), v[1]), btoa(msg));
        replaceSelection(field, `<color=${START_DELIMITER}${encoded}${END_DELIMITER}> </color>`);
    });

    button.appendTo(bbcodes);

    if (document.location.pathname.split('/')[1] === 'topic') {
        $('.text-color').filter(function () {
            return CRYPTO_REGEXP.test($(this).attr('style'));
        }).each(function () {
            let encoded = $(this).attr('style').match(CRYPTO_REGEXP)[1].replace(new RegExp(EQUAL_SUBSTITUTOR, 'g'), '=');
            console.log(encoded);
            let msg = atob(SUBSTITUTORS.reduce((acc, v) => acc.replace(new RegExp(v[1], 'g'), v[0]), encoded));
            $.post('https://avenoel.org/previsualisation', {content: `Message Avepremium: <spoiler>${msg}</spoiler>`}).done(res => {
                    $(this).html(res.content);
            });
        });
    }
})();