// ==UserScript==
// @name         B站自动跳过视频内广告
// @namespace    http://tampermonkey.net/
// @version      1.3.0
// @description  基于 BilibiliSponsorBlock，实现 B 站自动跳过片段、进度条染色渲染、以及可视化片段上报功能。
// @author       GEMINI
// @match        *://*.bilibili.com/video/*
// @match        *://www.bilibili.com/list/watchlater*
// @grant        GM_xmlhttpRequest
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_registerMenuCommand
// @connect      bsbsb.top
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    // ================== 配置与常量 ==================
    const API_BASE = "https://bsbsb.top/api";
    const HEADERS = {
        "origin": "tampermonkey-bilibili-skip",
        "x-ext-version": "1.3.0"
    };

    const CATEGORIES = {
        "sponsor": "赞助广告",
        "intro": "片头 / 动画",
        "outro": "片尾 / 鸣谢",
        "interaction": "互动提醒 (求三连)",
        "selfpromo": "自我推广",
        "music_offtopic": "音乐 / 非主题",
        "preview": "下集预告",
        "filler": "无意义填充",
        "poi_highlight": "高光时刻 (不跳过)"
    };

    const CATEGORY_COLORS = {
        "sponsor": "#00d400", "intro": "#00ffff", "outro": "#0202ed",
        "interaction": "#cc00ff", "selfpromo": "#ffff00", "music_offtopic": "#ff9900",
        "preview": "#008fd6", "filler": "#7300FF", "poi_highlight": "#ff1684"
    };

    const DEFAULT_SETTINGS = {
        "sponsor": true, "intro": true, "outro": true,
        "interaction": false, "selfpromo": false, "music_offtopic": false,
        "preview": false, "filler": false
    };

    // ================== 全局变量 ==================
    let userSettings = GM_getValue("skipSettings", DEFAULT_SETTINGS);
    let currentSegments = [];  // 所有片段 (用于渲染进度条)
    let activeSkipZones = [];  // 预过滤后的执行片段 (用于秒级比对跳过)
    
    // [新增] 状态追踪，用于防止重复发包和误跳过
    let recordedViews = new Set();  // 记录已经发过 recordView 请求的 UUID
    let ignoredZones = new Set();   // 记录用户手动拖进去的片段，临时忽略
    let lastTimeUpdate = 0;         // 记录上一帧的时间，用于判断是否为手动拖拽(Seek)

    let videoElement = null;
    let lastVideoKey = "";
    let skipLockTimer = null; 

    // ================== 核心功能 ==================

    function getOrGenerateUserID() {
        let id = GM_getValue("sponsorUserID");
        if (!id || id.length < 30) {
            id = Array.from({length: 32}, () => Math.random().toString(36).charAt(2)).join('');
            GM_setValue("sponsorUserID", id);
        }
        return id;
    }

    function getVideoInfo() {
        let bvid = location.pathname.match(/BV[a-zA-Z0-9]+/) ? location.pathname.match(/BV[a-zA-Z0-9]+/)[0] : "";
        let cid = "";
        try {
            // 兼容脚本猫与篡改猴的变量读取方式
            const targetWindow = typeof unsafeWindow !== 'undefined' ? unsafeWindow : window;
            if (targetWindow.__INITIAL_STATE__) {
                cid = targetWindow.__INITIAL_STATE__.videoData?.cid || targetWindow.__INITIAL_STATE__.epInfo?.cid || "";
            }
        } catch (e) {}
        return { bvid, cid };
    }

    function compileActiveZones() {
        activeSkipZones = [];
        currentSegments.forEach(seg => {
            if (userSettings[seg.category] && (!seg.actionType || seg.actionType === "skip")) {
                activeSkipZones.push({
                    start: seg.segment[0],
                    end: seg.segment[1],
                    uuid: seg.UUID,
                    catName: CATEGORIES[seg.category] || seg.category
                });
            }
        });
    }

    function fetchSegments(bvid, cid) {
        if (!bvid) return;
        let url = `${API_BASE}/skipSegments?videoID=${bvid}${cid ? `&cid=${cid}` : ''}`;

        // 切换视频时，清空之前记录的防重复和忽略名单
        recordedViews.clear();
        ignoredZones.clear();

        GM_xmlhttpRequest({
            method: "GET",
            url: url,
            headers: HEADERS,
            onload: function(response) {
                if (response.status === 200) {
                    try {
                        currentSegments = JSON.parse(response.responseText);
                        compileActiveZones(); 
                        renderProgressMarkers(); 
                    } catch (e) {}
                } else {
                    currentSegments = [];
                    activeSkipZones = [];
                }
            }
        });
    }

    function submitSegment(start, end, category) {
        const { bvid, cid } = getVideoInfo();
        if (!bvid || !videoElement) return showToast("未能获取视频状态，请稍后再试。");
        if (start >= end) return showToast("结束时间必须大于起始时间！");

        const data = {
            videoID: bvid, cid: cid, userID: getOrGenerateUserID(),
            userAgent: "Tampermonkey-Bilibili-Skip/1.3.0",
            videoDuration: videoElement.duration,
            segments: [{
                segment: [parseFloat(start), parseFloat(end)],
                category: category,
                actionType: category === 'poi_highlight' ? "poi" : "skip"
            }]
        };

        GM_xmlhttpRequest({
            method: "POST",
            url: `${API_BASE}/skipSegments`,
            headers: Object.assign({"Content-Type": "application/json"}, HEADERS),
            data: JSON.stringify(data),
            onload: res => {
                if ([200, 201].includes(res.status)) {
                    showToast("上报成功！感谢你的贡献。");
                    document.getElementById("skip-report-modal")?.remove();
                    fetchSegments(bvid, cid);
                } else if (res.status === 403) showToast("被自动审核拒绝。");
                else if (res.status === 409) showToast("片段已存在。");
                else showToast("上报失败：" + res.status);
            }
        });
    }

    function recordView(uuid) {
        GM_xmlhttpRequest({
            method: "POST",
            url: `${API_BASE}/viewedVideoSponsorTime`,
            headers: Object.assign({"Content-Type": "application/json"}, HEADERS),
            data: JSON.stringify({ UUID: uuid })
        });
    }

    // ================== DOM 交互与事件 ==================

    function renderProgressMarkers() {
        if (!videoElement || isNaN(videoElement.duration) || videoElement.duration <= 0) return;
        
        const progressBars = document.querySelectorAll('.bpx-player-progress-schedule, .bpx-player-shadow-progress-schedule');
        if (progressBars.length === 0) return;

        document.querySelectorAll('.sponsor-segment-marker').forEach(e => e.remove());

        const duration = videoElement.duration;
        const fragment = document.createDocumentFragment();

        currentSegments.forEach(seg => {
            const start = seg.segment[0];
            const end = seg.segment[1];
            const marker = document.createElement('div');
            marker.className = 'sponsor-segment-marker';
            marker.style.cssText = `
                position: absolute; top: 0; height: 100%;
                left: ${(start / duration) * 100}%;
                width: ${((end - start) / duration) * 100}%;
                background-color: ${CATEGORY_COLORS[seg.category] || "#fff"};
                z-index: 5; opacity: 0.6; pointer-events: none;
            `;
            fragment.appendChild(marker);
        });

        progressBars.forEach(bar => bar.appendChild(fragment.cloneNode(true)));
    }

    function onTimeUpdate() {
        if (activeSkipZones.length === 0 || skipLockTimer) return;
        let currentTime = videoElement.currentTime;

        // 判断用户是否正在进行大跨度的拖拽 (前后相差超过 1 秒)
        let isSeeking = Math.abs(currentTime - lastTimeUpdate) > 1.0;
        lastTimeUpdate = currentTime;

        for (let i = 0; i < activeSkipZones.length; i++) {
            let zone = activeSkipZones[i];

            // 如果用户是手动拖拽，并且正好拖拽到了广告区间内
            if (isSeeking && currentTime >= zone.start && currentTime < zone.end) {
                ignoredZones.add(zone.uuid); // 暂时忽略这个片段，允许用户观看
                continue;
            }

            // 如果当前进度完全离开了这个片段，解除忽略状态
            if (currentTime < zone.start || currentTime > zone.end) {
                ignoredZones.delete(zone.uuid);
            }

            // 核心逻辑：正常播放进入了跳过区间，并且该区间目前没有被用户手动操作忽略
            if (!isSeeking && currentTime >= zone.start && currentTime < (zone.end - 0.5) && !ignoredZones.has(zone.uuid)) {
                
                skipLockTimer = setTimeout(() => { skipLockTimer = null; }, 1500);
                
                videoElement.currentTime = zone.end;
                lastTimeUpdate = zone.end; // 同步 lastTimeUpdate，防止触发下一帧的 Seeking 判断
                showToast(`已为您跳过: ${zone.catName}`);

                // 防重复请求机制：如果当前视频此片段未发送过统计，才发送
                if (!recordedViews.has(zone.uuid)) {
                    recordView(zone.uuid);
                    recordedViews.add(zone.uuid);
                }
                break;
            }
        }
    }

    function monitorVideoChange() {
        setInterval(() => {
            const { bvid, cid } = getVideoInfo();
            const currentKey = `${bvid}_${cid}`;

            if (bvid && currentKey !== lastVideoKey) {
                lastVideoKey = currentKey;
                currentSegments = [];
                activeSkipZones = [];
                fetchSegments(bvid, cid);
            }

            let videoNodes = document.querySelectorAll("video, bwp-video");
            let activeVideo = Array.from(videoNodes).find(v => v.offsetWidth > 0) || videoNodes[0];
            
            if (activeVideo && activeVideo !== videoElement) {
                if (videoElement) {
                    videoElement.removeEventListener("timeupdate", onTimeUpdate);
                    videoElement.removeEventListener("loadeddata", renderProgressMarkers);
                }
                videoElement = activeVideo;
                lastTimeUpdate = videoElement.currentTime; // 初始化进度追踪
                videoElement.addEventListener("timeupdate", onTimeUpdate);
                videoElement.addEventListener("loadeddata", renderProgressMarkers);
            }

            if (currentSegments.length > 0 && document.querySelectorAll('.sponsor-segment-marker').length === 0) {
                renderProgressMarkers();
            }
        }, 1500);
    }

    // ================== UI 与弹窗界面 ==================

    function injectStyles() {
        if(document.getElementById("skip-styles")) return;
        const style = document.createElement("style");
        style.id = "skip-styles";
        style.innerHTML = `
            .skip-modal-mask { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 999999; display: flex; align-items: center; justify-content: center; font-family: sans-serif; }
            .skip-modal-content { background: #fff; width: 380px; border-radius: 8px; padding: 20px; box-shadow: 0 4px 12px rgba(0,0,0,0.15); color: #333;}
            .skip-modal-content h3 { margin: 0 0 15px 0; font-size: 18px; border-bottom: 1px solid #eee; padding-bottom: 10px; }
            .skip-setting-item { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; font-size: 14px; }
            .skip-input-group { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
            .skip-input-group label { width: 70px; font-size: 14px;}
            .skip-input-group input, .skip-input-group select { flex: 1; padding: 6px; border: 1px solid #ccc; border-radius: 4px; }
            .skip-btn-small { padding: 5px 8px; font-size: 12px; border: 1px solid #00aeec; background: #fff; color: #00aeec; border-radius: 4px; cursor: pointer; }
            .skip-modal-actions { margin-top: 20px; display: flex; justify-content: flex-end; gap: 10px; }
            .skip-btn { padding: 6px 15px; border: none; border-radius: 4px; cursor: pointer; }
            .skip-btn-save { background: #00aeec; color: #fff; }
            .skip-btn-cancel { background: #e5e9ef; color: #555; }
            #skip-toast { position: fixed; bottom: 100px; left: 20px; background: rgba(0,0,0,0.8); color: #fff; padding: 10px 18px; border-radius: 4px; z-index: 999999; font-size: 14px; pointer-events: none; transition: opacity 0.3s; opacity: 0; }
            .skip-stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; text-align: center; }
            .skip-stat-box { background: #f4f5f7; padding: 10px; border-radius: 6px;}
            .skip-stat-num { font-size: 20px; font-weight: bold; color: #00aeec; margin-top: 5px;}
        `;
        document.head.appendChild(style);

        const toast = document.createElement("div");
        toast.id = "skip-toast";
        document.body.appendChild(toast);
    }

    let toastTimeout;
    function showToast(text) {
        const toast = document.getElementById("skip-toast");
        if (!toast) return;
        toast.innerText = text;
        toast.style.opacity = "1";
        clearTimeout(toastTimeout);
        toastTimeout = setTimeout(() => toast.style.opacity = "0", 3500);
    }

    function createModal(id, innerHTML, onMount) {
        if (document.getElementById(id)) return;
        const modal = document.createElement("div");
        modal.id = id; modal.className = "skip-modal-mask";
        modal.innerHTML = innerHTML;
        document.body.appendChild(modal);
        if(onMount) onMount(modal);
    }

    function openSettingsUI() {
        let checkboxesHtml = Object.keys(CATEGORIES).filter(k => k !== 'poi_highlight').map(key => `
            <label class="skip-setting-item">
                <span><span style="display:inline-block;width:12px;height:12px;border-radius:2px;background:${CATEGORY_COLORS[key]};margin-right:5px;"></span>${CATEGORIES[key]}</span>
                <input type="checkbox" id="chk-${key}" ${userSettings[key] ? "checked" : ""}>
            </label>
        `).join("");

        createModal("skip-settings-modal", `
            <div class="skip-modal-content">
                <h3>自动跳过设置</h3>
                <div style="margin-bottom: 15px; font-size: 12px; color: #999;">勾选想要跳过的片段，进度条会渲染对应颜色</div>
                ${checkboxesHtml}
                <div class="skip-modal-actions">
                    <button class="skip-btn skip-btn-cancel" id="set-cancel">取消</button>
                    <button class="skip-btn skip-btn-save" id="set-save">保存</button>
                </div>
            </div>
        `, (modal) => {
            document.getElementById("set-cancel").onclick = () => modal.remove();
            document.getElementById("set-save").onclick = () => {
                Object.keys(CATEGORIES).filter(k => k !== 'poi_highlight').forEach(k => {
                    let chk = document.getElementById(`chk-${k}`);
                    userSettings[k] = chk ? chk.checked : false;
                });
                GM_setValue("skipSettings", userSettings);
                compileActiveZones(); 
                modal.remove();
                showToast("设置已保存！");
            };
        });
    }

    function openReportUI() {
        let optionsHtml = Object.keys(CATEGORIES).map(key => `<option value="${key}">${CATEGORIES[key]}</option>`).join("");
        createModal("skip-report-modal", `
            <div class="skip-modal-content">
                <h3>标记并上报片段</h3>
                <div class="skip-input-group"><label>类型</label><select id="rep-cat">${optionsHtml}</select></div>
                <div class="skip-input-group"><label>开始</label><input type="number" id="rep-start"><button class="skip-btn-small" id="btn-start">当前时间</button></div>
                <div class="skip-input-group"><label>结束</label><input type="number" id="rep-end"><button class="skip-btn-small" id="btn-end">当前时间</button></div>
                <div class="skip-modal-actions">
                    <button class="skip-btn skip-btn-cancel" id="rep-cancel">取消</button>
                    <button class="skip-btn skip-btn-save" id="rep-save">提交</button>
                </div>
            </div>
        `, (modal) => {
            document.getElementById("btn-start").onclick = () => videoElement && (document.getElementById("rep-start").value = videoElement.currentTime.toFixed(3));
            document.getElementById("btn-end").onclick = () => videoElement && (document.getElementById("rep-end").value = videoElement.currentTime.toFixed(3));
            document.getElementById("rep-cancel").onclick = () => modal.remove();
            document.getElementById("rep-save").onclick = () => {
                const start = document.getElementById("rep-start").value;
                const end = document.getElementById("rep-end").value;
                if (!start || !end) return showToast("请完整填写起止时间");
                submitSegment(start, end, document.getElementById("rep-cat").value);
            };
        });
    }

    function openStatsUI() {
        showToast("正在查询你的贡献数据...");
        const uid = getOrGenerateUserID();
        
        GM_xmlhttpRequest({
            method: "GET",
            url: `${API_BASE}/userInfo?userID=${uid}`,
            headers: HEADERS,
            onload: res => {
                let data = { minutesSaved: 0, segmentCount: 0, viewCount: 0 };
                if (res.status === 200) data = JSON.parse(res.responseText);
                
                createModal("skip-stats-modal", `
                    <div class="skip-modal-content">
                        <h3>我的数据与贡献</h3>
                        <div style="font-size:12px; color:#999; margin-bottom:10px;">ID: ${uid.substring(0,8)}***</div>
                        <div class="skip-stats-grid">
                            <div class="skip-stat-box"><div>节约时间</div><div class="skip-stat-num">${data.minutesSaved.toFixed(1)} <span style="font-size:12px">分钟</span></div></div>
                            <div class="skip-stat-box"><div>上报片段数</div><div class="skip-stat-num">${data.segmentCount}</div></div>
                            <div class="skip-stat-box" style="grid-column: span 2;"><div>你的提交被他人跳过次数</div><div class="skip-stat-num">${data.viewCount} <span style="font-size:12px">次</span></div></div>
                        </div>
                        <div class="skip-modal-actions"><button class="skip-btn skip-btn-cancel" id="stat-close">关闭</button></div>
                    </div>
                `, (modal) => {
                    document.getElementById("stat-close").onclick = () => modal.remove();
                });
            }
        });
    }

    function init() {
        injectStyles();
        GM_registerMenuCommand("设置跳过类型", openSettingsUI);
        GM_registerMenuCommand("上报跳过片段", openReportUI);
        GM_registerMenuCommand("查看我的贡献", openStatsUI);
        monitorVideoChange();
        console.log("启动");
    }

    if (document.readyState === "loading") document.addEventListener("DOMContentLoaded", init);
    else init();

})();