// ==UserScript==
// @name         云展网下载PDF
// @namespace    http://tampermonkey.net/yunzhanpDF
// @version      1.1
// @description  云展网下载高清PDF！
// @author       ZouYS
// @match        https://*.yunzhan365.com/*
// @icon         https://book.yunzhan365.com/web/images/nav_logo_big.jpg
// @require      https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js
// @require      https://cdn.jsdelivr.net/npm/sweetalert2@11
// @require      https://fastly.jsdelivr.net/npm/sweetalert2@11
// @grant        GM_addStyle
// @grant        GM_addElement
// @grant        unsafeWindow
// @run-at       document-end
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    window.onload = function() {
        /*if(!window.htmlConfig){
            console.error('error!')
            return 1;
        }*/

        let css = `.mydiv1{
            position: absolute;
            z-index: 9999999999;
            left: 100px;
            top: 300px;
            display: none;
        }
        .mybtn1 {
            z-index: 9999999999;
            position: absolute;
            top: 300px;
            font-size: inherit;
            font-family: inherit;
            color: white;
            padding: 0.5em 1em;
            outline: none;
            border: none;
            background-color: hsl(236, 32%, 26%);
            overflow: hidden;
            transition: color 0.4s ease-in-out;
        }
        .mybtn2 {
            z-index: 9999999999;
            position: absolute;
            top: 350px;
            font-size: inherit;
            font-family: inherit;
            color: white;
            padding: 0.5em 1em;
            outline: none;
            border: none;
            background-color: hsl(236, 32%, 26%);
            overflow: hidden;
            transition: color 0.4s ease-in-out;
        }

        .mybtn2::before,.mybtn1::before {
            content: '';
            z-index: -1;
            position: absolute;
            top: 100%;
            right: 100%;
            width: 1em;
            height: 1em;
            border-radius: 50%;
            background-color: #3cefff;
            transform-origin: center;
            transform: translate3d(50%, -50%, 0) scale3d(0, 0, 0);
            transition: transform 0.45s ease-in-out;
        }

        .mybtn2:hover,.mybtn1:hover {
            cursor: pointer;
            color: #161616;
        }

        .mybtn2:hover::before,.mybtn1:hover::before {
            transform: translate3d(50%, -50%, 0) scale3d(15, 15, 15);
        }`;
        GM_addStyle(css);
        const button = document.createElement('button')
        button.classList.add('mybtn1')
        button.innerText = '高清下载PDF'
        document.body.append(button)
        button.onclick = ()=>{
            // console.log(unsafeWindow)
            let newUrl=document.getElementsByTagName('iframe')[0] && document.getElementsByTagName('iframe')[0].src
            if(newUrl){
                unsafeWindow.location.href=newUrl
            }
            if (Swal) {
                Swal.fire({
                    position: 'top-end', //定位 左上角
                    type: 'success',
                    title: '↑↑↑下载中，请留意浏览器右上角↑↑↑弹窗~',
                    showConfirmButton: false,
                    timer: 1500
                })
            }
            /*if(!unsafeWindow.htmlConfig.fliphtml5_pages){
                GM_addElement('script', {
                    src: douc,
                    type: 'text/javascript'
                });
            }*/

            let meta=unsafeWindow.htmlConfig || console.error('no meta data!')
            let imgUrls= meta.fliphtml5_pages
            let basicUrl=meta.meta.url
            basicUrl=basicUrl.slice(0,basicUrl.lastIndexOf('/')+1)

            addImageToPDF(meta,imgUrls,basicUrl).then(pdf => {
                pdf.save(`${meta.meta.title}.pdf`);
            });
        }

        async function addImageToPDF(meta,imageUrls,basicUrl) {
            let pdf;
            for (let i = 0; i < imageUrls.length; i++) {
                try {
                    let url=imageUrls[i].n[0].split('?')[0]
                    url+=`?x-oss-process=image/sharpen,100`
                    if(url.includes('files/large/')){
                        url=url.replace('../','')
                    }else {
                        url='files/large/'+url
                    }
                    url=basicUrl+url;
                    console.log(`第${i+1}页  url:`,url)
                    const img = await loadImage(url);
                    const imgWidth = img.width;
                    const imgHeight = img.height;
                    if(!pdf){
                        pdf=new jspdf.jsPDF({
                            orientation: imgWidth/imgHeight>1?'l':'p',
                            unit: 'px',
                            format: [imgWidth, imgHeight],
                            compress: true
                        });
                    }
                    if(i!==0){
                        pdf.addPage({
                            format: [imgWidth, imgHeight],
                        });
                    }
                    /*const pageWidth = pdf.internal.pageSize.width;
                    const pageHeight = pdf.internal.pageSize.height;

                    // 计算缩放比例
                    const ratio = Math.min(pageWidth / imgWidth, pageHeight / imgHeight);
                    const newWidth = imgWidth * ratio;
                    const newHeight = imgHeight * ratio;*/

                    // 计算居中位置
                    const x = 0;
                    const y = 0;
                    // 确保坐标和尺寸有效
                    pdf.addImage(img, 'WEBP', x, y, imgWidth, imgHeight);
                    /*if (newWidth > 0 && newHeight > 0 && x >= 0 && y >= 0) {
                        pdf.addImage(img, 'WEBP', x, y, newWidth, newHeight);
                    } else {
                        console.error('Invalid dimensions or coordinates:', { newWidth, newHeight, x, y });
                    }*/
                    /*if(i!==imageUrls.length-1){
                        pdf.addPage()
                    }*/
                    if (Swal &&  i>10) {
                        Swal.fire({
                            position: 'top-end', //定位 左上角
                            icon: 'success',
                            title: `加载中，第${i+1}页`,
                            showConfirmButton: false,
                        })
                    }
                }catch (e) {
                    if (Swal) {
                        Swal.fire({
                            icon: 'error',
                            title: `下载失败，${e.message}`,
                            showConfirmButton: true,
                        })
                    }
                }

            }
            return pdf;
        }
        function loadImage(url) {
            return new Promise((resolve, reject) => {
                const img = new Image();
                img.crossOrigin = 'anonymous'; // 处理跨域问题
                img.src = url;
                img.onload = () => {
                    /*const canvas = document.createElement('canvas');
                    canvas.width = img.width;
                    canvas.height = img.height;
                    const ctx = canvas.getContext('2d');
                    ctx.drawImage(img, 0, 0);*/
                    // resolve(canvas.toDataURL('image/webp'));
                    resolve(img);
                };
                img.onerror = reject;
            });
        }
    }
    // Your code here...
})();