// ==UserScript==
// @name         桂林理工大学助学系统|笔果题库|免费版(仅供体验)|使用说明:http://doc.zhanyc.cn/pages/bgtk/
// @version      1.0
// @description  当前是免费版本。如需视频全自动秒过+作业答题等高级全自动功能可升级付费版本|接各类脚本开发、代挂任务，微信：zhanyc_cn 个人网站：http://doc.zhanyc.cn
// @author       zfk
// @include      *://*biguotk.com/*
// @grant        GM_addStyle
// @run-at       document-end
// @require      http://libs.baidu.com/jquery/2.0.0/jquery.min.js
// @license      Creative Commons
// ==/UserScript==
(function () {
  let $jq = $;
  unsafeWindow.$jq = $jq;
  let docUrl = "http://doc.zhanyc.cn/pages/bgtk/";

  let FREEJS = {
    pageData: {
      isListPage: false,
    },
    init() {
      console.log("%c FREEJS init", "background:rgb(0,0,0);color:#fff");
      this.injectStyles();
      this.addFloatingPanel();
      this.detectPage();
    },
    injectStyles() {
      GM_addStyle(`
        .freejs-float-panel{position:fixed;top:10px;left:10px;z-index:2147483647;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:8px;box-shadow:0 4px 20px rgba(102,126,234,0.5);padding:14px 18px;min-width:220px;max-width:320px;color:#fff;font-size:13px;line-height:1.6;font-family:'Microsoft YaHei',sans-serif;}
        .freejs-float-panel .freejs-title{font-size:15px;font-weight:bold;margin-bottom:8px;padding-right:20px;}
        .freejs-float-panel .freejs-close{position:absolute;top:4px;right:8px;background:none;border:none;cursor:pointer;font-size:22px;color:#fff;padding:0;line-height:1;opacity:0.8;}
        .freejs-float-panel .freejs-close:hover{opacity:1;}
        .freejs-float-panel .freejs-body{margin-bottom:8px;}
        .freejs-float-panel .freejs-body p{margin:4px 0;}
        .freejs-float-panel .freejs-btn{display:inline-block;background:#fff;color:#667eea;padding:4px 12px;border-radius:4px;text-decoration:none;font-weight:bold;font-size:12px;cursor:pointer;margin-top:4px;border:none;}
        .freejs-float-panel .freejs-btn:hover{background:#f0f0f0;}
        .freejs-modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:2147483646;display:flex;align-items:center;justify-content:center;}
        .freejs-modal-box{background:#fff;border-radius:8px;padding:0;max-width:420px;width:90%;box-shadow:0 8px 32px rgba(0,0,0,0.3);overflow:hidden;}
        .freejs-modal-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:14px 20px;font-size:16px;font-weight:bold;text-align:center;}
        .freejs-modal-body{padding:20px;font-size:14px;color:#333;line-height:1.8;}
        .freejs-modal-body .freejs-features{margin:10px 0;padding:10px;background:#f8f9fa;border-radius:6px;border-left:3px solid #667eea;}
        .freejs-modal-body .freejs-features li{margin:4px 0;list-style:none;padding-left:4px;}
        .freejs-modal-footer{display:flex;border-top:1px solid #eee;}
        .freejs-modal-footer button{flex:1;padding:12px;font-size:14px;border:none;cursor:pointer;font-weight:bold;transition:background 0.2s;}
        .freejs-modal-footer .freejs-btn-primary{background:#667eea;color:#fff;}
        .freejs-modal-footer .freejs-btn-primary:hover{background:#5a6fd6;}
        .freejs-modal-footer .freejs-btn-cancel{background:#f5f5f5;color:#666;}
        .freejs-modal-footer .freejs-btn-cancel:hover{background:#e8e8e8;}
      `);
    },
    addFloatingPanel() {
      if ($(".freejs-float-panel").length > 0) return;
      let panelHtml = `
        <div class="freejs-float-panel">
          <button class="freejs-close">&times;</button>
          <div class="freejs-title">笔果学习平台</div>
          <div class="freejs-body">
            <p>脚本匹配成功，付费后即可使用全功能</p>
            <p>如需全功能使用，请安装付费版本</p>
            <p style="margin-top:6px;font-size:12px;opacity:0.9;">接各类脚本开发、代挂、网站小程序开发，微信：zhanyc_cn</p>
          </div>
          <a class="freejs-btn" href="${docUrl}" target="_blank">查看付费版详情</a>
        </div>
      `;
      $("body").append(panelHtml);
      $(".freejs-float-panel .freejs-close").on("click", function () {
        $(".freejs-float-panel").remove();
      });
    },
    detectPage() {
      setTimeout(() => {
        // 检测是否为课程列表页面（有view-item或video-list等课程元素）
        let hasCourseList = $(".view-item").length > 0 || $(".video-list").length > 0;
        if (hasCourseList) {
          this.pageData.isListPage = true;
          this.handleListPage();
        } else {
          this.pageData.isListPage = false;
          this.handleNonListPage();
        }
      }, 3000);
    },
    handleListPage() {
      console.log("%c FREEJS list page", "background:rgb(0,0,0);color:#fff");
      // 延迟等待课程列表完全加载
      let checkTimer = setInterval(() => {
        if ($(".view-item").length > 0) {
          clearInterval(checkTimer);
          this.interceptCourseClicks();
        }
      }, 500);
    },
    interceptCourseClicks() {
      // 使用事件捕获阶段拦截课程项的点击
      document.addEventListener("click", (e) => {
        let target = e.target;
        // 检查点击的目标或其父级是否是view-item（课程项）
        let $courseItem = $(target).closest(".view-item");
        if ($courseItem.length > 0) {
          e.preventDefault();
          e.stopPropagation();
          e.stopImmediatePropagation();
          this.showPurchaseDialog();
          return false;
        }
      }, true);
    },
    showPurchaseDialog() {
      this.showModal({
        title: "需要购买后使用",
        content: `
          <p>该功能需要购买付费版本后才能使用</p>
          <div class="freejs-features">
            <p style="font-weight:bold;margin-bottom:6px;">付费版功能：</p>
            <li>✅ 视频全自动秒过</li>
            <li>✅ 作业自动答题</li>
            <li>✅ 全自动换课程</li>
            <li>✅ 无人值守运行</li>
          </div>
          <p style="margin-top:10px;">点击下方"去购买"按钮查看购买方式</p>
        `,
        btnText: "去购买",
        btnAction: () => {
          window.open(docUrl);
          this.closeModal();
        },
        showCancel: true,
      });
    },
    handleNonListPage() {
      // 检测是否在需要脚本功能的页面（有video播放、作业等元素）
      let $body = $("body");
      let hasVideo = $("video").length > 0;
      let hasHomework = $body.text().indexOf("作业") != -1 || $(".work-item").length > 0;
      let isRelevantPage = hasVideo || hasHomework || location.href.indexOf("/myLearning") != -1;
      if (isRelevantPage) {
        console.log("%c FREEJS non-list page", "background:rgb(255,0,0);color:#fff");
        this.showUnauthorizedDialog();
      }
    },
    showUnauthorizedDialog() {
      this.showModal({
        title: "脚本未授权",
        content: `
          <p>当前页面需要付费授权后才能使用</p>
          <div class="freejs-features">
            <p style="font-weight:bold;margin-bottom:6px;">付费版功能：</p>
            <li>✅ 视频全自动秒过</li>
            <li>✅ 作业自动答题</li>
            <li>✅ 全自动换课程</li>
            <li>✅ 无人值守运行</li>
          </div>
          <p style="margin-top:10px;">请购买授权后刷新页面使用</p>
        `,
        btnText: "去购买授权",
        btnAction: () => {
          window.open(docUrl);
          this.closeModal();
        },
        showCancel: true,
      });
    },
    showModal(opts) {
      this.closeModal();
      let modalOverlay = document.createElement("div");
      modalOverlay.className = "freejs-modal-overlay";
      modalOverlay.id = "freejs-modal";
      modalOverlay.innerHTML = `
        <div class="freejs-modal-box">
          <div class="freejs-modal-header">${opts.title}</div>
          <div class="freejs-modal-body">${opts.content}</div>
          <div class="freejs-modal-footer">
            ${opts.showCancel ? '<button class="freejs-btn-cancel" id="freejs-modal-cancel">关闭</button>' : ''}
            <button class="freejs-btn-primary" id="freejs-modal-confirm" style="${opts.showCancel ? '' : 'width:100%;'}">${opts.btnText}</button>
          </div>
        </div>
      `;
      document.body.appendChild(modalOverlay);
      document.getElementById("freejs-modal-confirm").onclick = opts.btnAction;
      if (opts.showCancel) {
        document.getElementById("freejs-modal-cancel").onclick = () => this.closeModal();
      }
      modalOverlay.onclick = (e) => {
        if (e.target === modalOverlay) this.closeModal();
      };
    },
    closeModal() {
      let el = document.getElementById("freejs-modal");
      if (el) el.remove();
    },
  };

  setTimeout(() => {
    if (typeof (zfk) == 'undefined') {
      FREEJS.init();
    } else {
      console.log('skip init');
    }
  }, 3000);
})();