// ==UserScript==
// @name         DGUT优学院自动阅读器
// @namespace    http://tampermonkey.net/
// @version      0.7.1
// @description  自动启读+本地保存秒数设置，刷新不用重开
// @author       豆包、uhys
// @match        *://*/*
// @grant        none
// @run-at       document-idle
// @license MIT
// @downloadURL https://update.greasyfork.icu/scripts/572461/DGUT%E4%BC%98%E5%AD%A6%E9%99%A2%E8%87%AA%E5%8A%A8%E9%98%85%E8%AF%BB%E5%99%A8.user.js
// @updateURL https://update.greasyfork.icu/scripts/572461/DGUT%E4%BC%98%E5%AD%A6%E9%99%A2%E8%87%AA%E5%8A%A8%E9%98%85%E8%AF%BB%E5%99%A8.meta.js
// ==/UserScript==

(function() {
    'use strict';

    // 仅阅读器iframe生效
    const isTargetIframe = !!document.querySelector('#nextBtn');
    if (!isTargetIframe) return;
    if (window.__AUTO_READER_INITED__) return;
    window.__AUTO_READER_INITED__ = true;

    // 读取本地储存 / 默认30秒
    let saveSec = localStorage.getItem("autoReaderSaveSec");
    let CLICK_INTERVAL = saveSec ? Number(saveSec) * 1000 : 30000;
    const DEFAULT_SEC = saveSec || 30;

    const NEXT_BTN_SELECTOR = '#nextBtn';
    let timer = null;
    let dragOffsetX = 0, dragOffsetY = 0;
    let startBtnEl = null;
    let inputEle = null;

    // 自动翻页
    function clickNextBtn() {
        const btn = document.querySelector(NEXT_BTN_SELECTOR);
        if (btn) btn.click();
    }

    // 开始阅读
    function startAuto() {
        if (timer) return;
        timer = setInterval(clickNextBtn, CLICK_INTERVAL);
        if(startBtnEl){
            startBtnEl.innerText = "正在翻动书本";
            startBtnEl.style.background = "#28a745";
        }
    }

    // 停止阅读
    function stopAuto() {
        if (!timer) return;
        clearInterval(timer);
        timer = null;
        if(startBtnEl){
            startBtnEl.innerText = "开始阅读";
            startBtnEl.style.background = "#007bff";
        }
    }

    // 修改+保存秒数
    function updateSec(sec) {
        if (!sec || isNaN(sec) || sec <= 0) {
            alert('请输入大于0的有效数字');
            return;
        }
        // 保存到本地
        localStorage.setItem("autoReaderSaveSec", sec);
        CLICK_INTERVAL = sec * 1000;

        // 重启计时
        if (timer) { stopAuto(); startAuto(); }
        alert(`已保存：每 ${sec} 秒翻动书本，下次刷新保留设置`);
    }

    // 创建可拖动面板
    function addDragPanel() {
        if (document.getElementById('autoReaderPanel')) return;

        const panel = document.createElement('div');
        panel.id = 'autoReaderPanel';
        panel.style.cssText = `
            position: absolute; top: 60px; right: 10px;
            z-index: 999999; background: #fff;
            border: 1px solid #ccc; border-radius: 8px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
            font-size: 14px; padding: 10px;
            user-select: none; width: 220px;
        `;

        // 拖动标题栏
        const dragHead = document.createElement('div');
        dragHead.innerText = '📖 自动阅读器（按住拖动）';
        dragHead.style.cssText = `
            background: #007bff; color: #fff;
            padding: 6px; border-radius: 6px;
            text-align: center; cursor: move;
            margin: -10px -10px 10px -10px;
        `;

        // 秒数输入行
        const descLine = document.createElement('div');
        descLine.style.cssText = `display:flex;align-items:center;gap:6px;margin-bottom:8px;`;
        descLine.innerHTML = `<span>每</span>
            <input type="number" id="secInput" value="${DEFAULT_SEC}" style="width:60px;padding:4px;border:1px solid #ccc;border-radius:4px;">
            <span>秒翻动书本</span>`;

        // 按钮区
        const btnLine = document.createElement('div');
        btnLine.style.cssText = `display:flex;gap:6px;flex-wrap:wrap;`;

        const changeBtn = document.createElement('button');
        changeBtn.innerText = '更改秒数';
        changeBtn.style.cssText = `padding:4px 8px;background:#28a745;color:#fff;border:none;border-radius:4px;cursor:pointer;`;
        changeBtn.onclick = ()=>{
            const val = document.getElementById('secInput').value.trim();
            updateSec(Number(val));
        };

        startBtnEl = document.createElement('button');
        startBtnEl.innerText = "开始阅读";
        startBtnEl.style.cssText = `padding:4px 8px;background:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer;`;
        startBtnEl.onclick = startAuto;

        const stopBtn = document.createElement('button');
        stopBtn.innerText = "停止";
        stopBtn.style.cssText = `padding:4px 8px;background:#6c757d;color:#fff;border:none;border-radius:4px;cursor:pointer;`;
        stopBtn.onclick = stopAuto;

        btnLine.append(changeBtn, startBtnEl, stopBtn);
        panel.append(dragHead, descLine, btnLine);

        // 挂载页面
        const container = document.querySelector('#recordDiv')?.parentElement || document.body;
        container.appendChild(panel);

        // 拖拽逻辑
        dragHead.addEventListener('mousedown', e=>{
            dragOffsetX = e.clientX - panel.offsetLeft;
            dragOffsetY = e.clientY - panel.offsetTop;
            document.addEventListener('mousemove', move);
            document.addEventListener('mouseup', endDrag);
        });
        function move(e){
            panel.style.left = (e.clientX - dragOffsetX) + 'px';
            panel.style.top = (e.clientY - dragOffsetY) + 'px';
            panel.style.right = 'auto';
        }
        function endDrag(){
            document.removeEventListener('mousemove', move);
            document.removeEventListener('mouseup', endDrag);
        }
    }

    // 页面加载：自动加载面板 + 自动启动阅读
    window.addEventListener('load', ()=>{
        setTimeout(()=>{
            addDragPanel();
            startAuto(); // 刷新/进课本 直接自动读
        }, 1200);
    });
})();