// ==UserScript==
// @name         轻小说文库+
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  目前功能只有章节批量下载
// @author       PY-DNG
// @match        http*://www.wenku8.net/*
// @grant        GM_download
// @grant        GM_xmlhttpRequest
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // Get tab url api part
    const API = window.location.href.replace(/https?:\/\/www\.wenku8\.net\//, '').replace(/\?.*/, '').replace(/^book\/\d+\.html?/, 'book');
    switch (API) {
        // Dwonload page
        case 'modules/article/packshow.php':
            pageDownload();
            break;
        // Index page
        case 'index.php':
            pageIndex();
            break;
        // Book page
        case 'book':
            pageBook();
            break;
        // Other pages
        default:
            console.log(API);
    }

    // Book page add-on
    function pageBook() {
    }

    // Index page add-on
    function pageIndex() {
    }

    // Download page add-on
    function pageDownload() {
        let i;
        /* ******************* GUI ******************* */
        // Create left operation GUI
        let downloadGUI = document.querySelectorAll('#left div.block')[1].cloneNode(true);
        // Rename title
        downloadGUI.querySelector('.blocktitle .txt').innerHTML = '下载全部章节';
        // Remove content
        downloadGUI.removeChild(downloadGUI.querySelector('.blockcontent'));
        // Create operation ul list
        let optionButtonsForm = document.querySelector('#left div.block div.blockcontent div ul[style]').cloneNode(true);
        // Reset lis
        const NAMES = ['本地简体(G)', '本地简体(U)', '本地繁体(U)', '地址二简体(G)', '地址二简体(U)', '地址二繁体(U)'];
        let lis = optionButtonsForm.querySelectorAll('li');
        let li = lis[0].cloneNode(true);
        let newli;
        li.querySelector('a').href = 'javascript:void(0);';
        li.querySelector('a').className = '';
        li.querySelector('a').innerHTML = '默认按钮文本';
        for (i = 0; i < 6; i++) {
            // If li exist, remove it
            if (lis[i]) {
                optionButtonsForm.removeChild(lis[i]);
            };
            // Create a new one
            newli = li.cloneNode(true);
            // Modify name
            newli.querySelector('a').innerHTML = NAMES[i];
            // Mark i
            newli.i = i;
            // Append it
            optionButtonsForm.appendChild(newli);
            // Add event listener
            newli.addEventListener('click',
            function() { // i refers to its current value in loop by marking on the li element
                downloadAll(this.i);
            })
        }
        // Create a container
        let blockcontent = document.createElement('div');
        blockcontent.classList.add('blockcontent');
        blockcontent.style.paddingLeft = '10px';
        // Append ul
        blockcontent.appendChild(optionButtonsForm);
        // Append container
        downloadGUI.appendChild(blockcontent);
        // Append GUI
        document.querySelector('#left').appendChild(downloadGUI);

        /* ******************* Code ******************* */
        // Get novel name
        const novelName = document.querySelector('html body div.main div#centerm div#content table.grid caption a').innerText;
        let downloadAll = function(type) {
            // GUI display
            downloadGUI.querySelector('.blocktitle .txt').innerHTML = '下载中...';
            // Name customize
            let NAME = novelName + ' {j}.';
            if (window.location.href.indexOf('txt') != -1) {
                NAME += 'txt';
            } else {
                NAME += document.querySelector('html body div.main div#centerm div#content table.grid tbody tr td.even a').innerText.replace(/[^\w]+/, '').toLowerCase();
            }
            let i,j = 0;
            const allA = document.querySelectorAll('.even a');
            for (i = type; i < allA.length; i = i + 6) {
                j += 1;
                GM_download({
                    url: allA[i].href,
                    name: NAME.replace('{j}', (window.location.href.indexOf('txtfull') === -1 ? String(j) : ''))
                });
            }
            downloadGUI.querySelector('.blocktitle .txt').innerHTML = '下载全部章节';
        }

        // File download function
        function download(details) {
            // Check
            if (!details.url || !details.name) {
                return false;
            }

            // xmlHTTPRequest
            GM_xmlhttpRequest({
                method:       'GET',
                url:          details.url,
                responseType: 'blob',
                onload:       function(request) {}
            })

            // Create <a>
            const a = document.createElement('a');
            //a.style.display = 'none';
            a.href = details.url;
            a.download = details.name;
            document.body.appendChild(a);
            a.click();
            console.log(a);
            //document.body.removeChild(a);
        }
    }
})();