// ==UserScript==
// @name         zasrywacz 2.0
// @match        https://karachan.org/*
// @grant        GM_xmlhttpRequest
// @connect      www.hovno.sk
// @run-at       document-end
// ==/UserScript==


function getRandomPictureUrl() {
    const page = Math.floor(Math.random() * 920) + 1;

    return new Promise(resolve => {
        GM_xmlhttpRequest({
            method: 'GET',
            url: `https://www.hovno.sk/galeria?strana=${page}`,

            onload: function (response) {
                const doc = new DOMParser().parseFromString(
                    response.responseText,
                    'text/html'
                );

                const images = doc.querySelectorAll('a.list-group-item.shit img');

                const randomImage =
                    images[Math.floor(Math.random() * images.length)];

                const picture = randomImage.closest('a.list-group-item.shit');
                const title = picture.querySelector('span:not(.badge)').textContent.trim();
                console.log(title);

                const fullUrl = randomImage.src.replace(
                    '/img/thumb/',
                    '/img/full/'
                );

                resolve({
                    url: fullUrl,
                    title: title
                });
            }
        });
    });
}


function downloadAndSetFile(url, title) {
    GM_xmlhttpRequest({
        method: 'GET',
        url: url,
        responseType: 'blob',

        onload: function (response) {
            const file = new File(
                [response.response],
                title + '.jpg',
                { type: response.response.type }
            );

            const input = document.querySelector(
                'input.upload[name="upfile"]'
            );

            const dataTransfer = new DataTransfer();
            dataTransfer.items.add(file);

            input.files = dataTransfer.files;

            input.dispatchEvent(
                new Event('change', { bubbles: true })
            );
        }
    });
}



function createButton() {
    const replyCell = document.querySelector('td.ladda-td');

    if (!replyCell) return;

    const button = document.createElement('button');


    button.textContent = 'zapostuj gówno';
    button.type = 'button';
    button.classList.add('ladda-button');
    button.dataset.style = 'expand-right';
    button.dataset.size = 'xs';
    button.dataset.color = 'mint';
    button.style.marginLeft = '6px';
    button.style.verticalAlign = 'top';
    button.addEventListener('click', async function () {
        const picture = await getRandomPictureUrl();
        downloadAndSetFile(picture.url, picture.title);
        document.querySelector('input.board-input[name="email"]').value = 'sage';

        document.querySelector('button.ladda-button .ladda-label').closest('button').click();
    });

    replyCell.appendChild(button);
}

createButton();