// ==UserScript==
// @name         Switch520下载优化
// @namespace    Switch520_Download_Optimize
// @version      1.8
// @description  Switch520点击下载按钮后，直接弹出下载地址，无需反复跳转、输入密码
// @author       一身惆怅
// @match        https://www.gamer520.com/*
// @match        https://gamer520.com/*
// @match        https://*.gamers520.com/*
// @connect      gamer520.com
// @connect      www.gamer520.com
// @connect      gamers520.com
// @connect      520.gamers520.com
// @connect      *
// @grant        GM_xmlhttpRequest
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_deleteValue
// @grant        GM_addValueChangeListener
// @grant        GM_removeValueChangeListener
// @grant        GM_openInTab
// @grant        GM_setClipboard
// @grant        GM_addStyle
// @run-at       document-end
// @noframes
// ==/UserScript==

(() => {
    'use strict';

    const IS_SOURCE = /(^|\.)gamer520\.com$/.test(location.hostname);
    const IS_TARGET = /(^|\.)gamers520\.com$/.test(location.hostname);
    const PENDING_KEY = 'g520_pending';
    const CACHE_TTL = 6 * 3600e3;
    const HOP_TIMEOUT = 8000;
    const PREFETCH = true;
    const BLOCK_SEL = 'div.bdp-container';
    const GO_SEL = 'a[href*="/go?post_id="], a[href*="/go/?post_id="]';
    const PLATFORMS = [['baidu', /pan\.baidu\.com/i], ['quark', /pan\.quark\.cn/i], ['xunlei', /pan\.xunlei\.com/i]];

    const toUrl = (u, base = location.href) => {
        try { return new URL(u, base); } catch { return null; }
    };
    const platformOf = (url) => PLATFORMS.find(([, re]) => re.test(url))?.[0];
    const hasAny = (r) => Boolean(r?.baidu || r?.quark || r?.xunlei);

    const extractLinks = (doc) => {
        const scope = doc.querySelector('.bdp-container, .bdp-grid') ?? doc;
        const out = { baidu: null, quark: null, xunlei: null, unzip: '' };

        for (const img of scope.querySelectorAll('img')) {
            const qr = img.getAttribute('src') || img.getAttribute('data-src') || '';
            const url = toUrl(qr)?.searchParams.get('data')?.trim();
            const key = url && platformOf(url);
            if (key) out[key] ??= { url, qr };
        }
        for (const a of scope.querySelectorAll('a[href]')) {
            const url = a.getAttribute('href');
            const key = url.includes('/s/') && platformOf(url);
            if (key) out[key] ??= { url };
        }
        for (const [key] of PLATFORMS) {
            if (out[key]) out[key].pwd = toUrl(out[key].url)?.searchParams.get('pwd') ?? '';
        }
        if (out.baidu && !out.baidu.pwd) {
            out.baidu.pwd = scope.querySelector('.bdp-baidu .bdp-pwd-box strong')?.textContent.trim() ?? '';
        }
        const head = scope.querySelector('.bdp-header') ?? doc.querySelector('.bdp-header');
        out.unzip = head?.textContent.match(/解压密码\s*[:：]\s*([^\s|｜]+)/)?.[1] ?? '';
        return out;
    };

    if (IS_TARGET) {
        const pending = GM_getValue(PENDING_KEY, null);
        if (pending && Date.now() - pending.ts < 90e3) {
            const attempt = (left) => {
                const data = extractLinks(document);
                if (!hasAny(data) && left > 0) return setTimeout(attempt, 500, left - 1);
                GM_setValue(`g520_result_${pending.id}`, { ts: Date.now(), data, page: location.href });
                GM_deleteValue(PENDING_KEY);
                setTimeout(() => window.close(), 300);
            };
            attempt(10);
        }
        return;
    }
    if (!IS_SOURCE) return;

    const gmGet = (url) => new Promise((resolve, reject) => GM_xmlhttpRequest({
        method: 'GET',
        url,
        timeout: HOP_TIMEOUT,
        headers: { Referer: location.href },
        onload: (r) => resolve({ text: r.responseText ?? '', finalUrl: r.finalUrl || url }),
        onerror: () => reject(new Error('网络错误')),
        ontimeout: () => reject(new Error('请求超时')),
    }));

    const JS_JUMPS = [
        /location\.(?:replace|assign)\(\s*['"]([^'"]+)['"]/i,
        /(?:window\.|document\.|top\.|self\.)?location(?:\.href)?\s*=\s*['"]([^'"]+)['"]/i,
        /window\.open\(\s*['"]([^'"]+)['"]/i,
    ];

    const findNext = (text, doc, base) => {
        const abs = (u) => toUrl(u.replaceAll('&amp;', '&'), base)?.href ?? null;
        const refresh = doc.querySelector('meta[http-equiv="refresh" i]')?.getAttribute('content')?.match(/url\s*=\s*['"]?([^'"]+)/i);
        if (refresh) return abs(refresh[1]);
        for (const re of JS_JUMPS) {
            const m = text.match(re);
            if (m && !/^javascript:/i.test(m[1])) return abs(m[1]);
        }
        const a = doc.querySelector('a[href*="gamers520.com/"], a[href*="/go?"], a#go, a.go-link');
        return a ? abs(a.getAttribute('href')) : null;
    };

    const parser = new DOMParser();

    const resolveByRequest = async (url) => {
        for (let hop = 0, cur = url; hop < 6; hop++) {
            const { text, finalUrl } = await gmGet(cur);
            if (text.length < 12000 && /Just a moment|cf-mitigated|challenge-platform/i.test(text)) {
                throw new Error('Cloudflare 验证拦截');
            }
            const doc = parser.parseFromString(text, 'text/html');
            const data = extractLinks(doc);
            if (hasAny(data)) return { data, page: finalUrl };
            const next = findNext(text, doc, finalUrl);
            if (!next || next === cur) break;
            cur = next;
        }
        throw new Error('未在跳转链中找到网盘链接');
    };

    const resolveByTab = (url, id) => {
        const key = `g520_result_${id}`;
        const { promise, resolve, reject } = Promise.withResolvers();
        GM_deleteValue(key);
        GM_setValue(PENDING_KEY, { id, ts: Date.now() });
        const tab = GM_openInTab(url, { active: false, insert: true, setParent: true });
        const finish = () => {
            clearTimeout(timer);
            GM_removeValueChangeListener(listener);
            try { tab?.close?.(); } catch { }
        };
        const listener = GM_addValueChangeListener(key, (_k, _o, val) => {
            if (!val) return;
            finish();
            hasAny(val.data) ? resolve(val) : reject(new Error('目标页未找到网盘链接'));
        });
        const timer = setTimeout(() => {
            finish();
            GM_deleteValue(PENDING_KEY);
            reject(new Error('后台标签页超时'));
        }, 45e3);
        return promise;
    };

    const resolveLinks = async ({ goUrl, id }, allowTab) => {
        try {
            return await resolveByRequest(goUrl);
        } catch (e) {
            if (!allowTab) throw e;
            console.warn('[G520] 直连失败，切换后台标签页：', e.message);
            setStatus('直连受限，正在通过后台标签页解析');
            return resolveByTab(goUrl, id);
        }
    };

    const cacheKey = (id) => `g520_cache_${id}`;
    const readCache = (id) => {
        const c = GM_getValue(cacheKey(id), null);
        return hasAny(c?.data) && Date.now() - c.ts < CACHE_TTL ? c : null;
    };

    const inflight = new Map();

    const fetchLinks = (ctx, allowTab) => {
        const running = inflight.get(ctx.id);
        if (running) {
            return !allowTab || running.allowTab ? running.promise : running.promise.catch(() => fetchLinks(ctx, true));
        }
        const promise = resolveLinks(ctx, allowTab)
            .then(({ data, page }) => {
                const entry = { ts: Date.now(), data, page };
                GM_setValue(cacheKey(ctx.id), entry);
                return entry;
            })
            .finally(() => inflight.delete(ctx.id));
        inflight.set(ctx.id, { promise, allowTab });
        return promise;
    };

    const qrCache = new Map();

    const qrSource = ({ qr, url }) => qr?.replace(/size=\d+x\d+/, 'size=320x320')
        ?? `https://api.qrserver.com/v1/create-qr-code/?size=320x320&margin=0&data=${encodeURIComponent(url)}`;

    const loadQr = (item) => {
        const url = qrSource(item);
        if (!qrCache.has(url)) {
            const { promise, resolve } = Promise.withResolvers();
            const fallback = () => resolve(url);
            GM_xmlhttpRequest({
                method: 'GET',
                url,
                responseType: 'blob',
                timeout: 15e3,
                anonymous: true,
                onload: ({ status, response }) => {
                    if (status !== 200 || !response) return fallback();
                    const reader = new FileReader();
                    reader.onload = () => resolve(reader.result);
                    reader.onerror = fallback;
                    reader.readAsDataURL(response);
                },
                onerror: fallback,
                ontimeout: fallback,
            });
            qrCache.set(url, promise);
        }
        return qrCache.get(url);
    };

    const ICON = {
        close: '<svg viewBox="0 0 24 24" width="16" height="16" aria-hidden="true"><path d="M6 6l12 12M18 6L6 18" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/></svg>',
        qr: '<svg viewBox="0 0 24 24" width="14" height="14" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="1.6"><rect x="4" y="4" width="6" height="6" rx="1"/><rect x="14" y="4" width="6" height="6" rx="1"/><rect x="4" y="14" width="6" height="6" rx="1"/><path d="M14 14h2v2h-2zM18 18h2v2h-2zM14 18h2M18 14h2" stroke-linecap="round"/></svg>',
        link: '<svg viewBox="0 0 24 24" width="13" height="13" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"><path d="M10 14a4 4 0 0 0 5.66 0l3-3a4 4 0 0 0-5.66-5.66l-1 1"/><path d="M14 10a4 4 0 0 0-5.66 0l-3 3a4 4 0 0 0 5.66 5.66l1-1"/></svg>',
        copy: '<svg viewBox="0 0 24 24" width="14" height="14" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linejoin="round"><rect x="9" y="9" width="11" height="11" rx="2"/><path d="M5 15V6a2 2 0 0 1 2-2h8"/></svg>',
        open: '<svg viewBox="0 0 24 24" width="14" height="14" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M14 4h6v6M20 4l-9 9M18 14v5a1 1 0 0 1-1 1H5a1 1 0 0 1-1-1V7a1 1 0 0 1 1-1h5"/></svg>',
        refresh: '<svg viewBox="0 0 24 24" width="14" height="14" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M20 11a8 8 0 1 0-2.3 5.7M20 5v6h-6"/></svg>',
        stack: '<svg viewBox="0 0 24 24" width="14" height="14" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linejoin="round"><path d="M12 4l8 4-8 4-8-4z"/><path d="M4 12l8 4 8-4M4 16l8 4 8-4"/></svg>',
        check: '<svg viewBox="0 0 24 24" width="14" height="14" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M5 12l5 5L20 7"/></svg>',
        alert: '<svg viewBox="0 0 24 24" width="20" height="20" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"><circle cx="12" cy="12" r="9"/><path d="M12 7.5v5.5M12 16.5v.01"/></svg>',
    };

    const CSS = `
  :host{all:initial}
  *,*::before,*::after{box-sizing:border-box}
  .ld{
    --bg:#0B0D12;--surface:#11151D;--card:#10141C;--sunken:#0A0D12;
    --text:#E8EDF5;--text-2:#929BAA;--text-3:#687386;
    --line:rgba(255,255,255,.08);--line-2:rgba(255,255,255,.12);
    --accent:#4B8DFF;--r-lg:14px;--r-md:10px;--r-sm:8px;
    --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
    --mono:ui-monospace,SFMono-Regular,"Cascadia Mono",Consolas,Menlo,monospace;
    font-family:var(--sans);font-size:14px;line-height:1.5;color:var(--text);
    -webkit-font-smoothing:antialiased;
  }
  button{font:inherit;color:inherit;background:none;border:0;margin:0;padding:0;cursor:pointer}
  a{color:inherit;text-decoration:none}
  svg{display:block;flex:none}
  :focus-visible{outline:2px solid rgba(75,141,255,.7);outline-offset:2px}

  .ld-mask{position:fixed;inset:0;z-index:2147483000;display:flex;align-items:center;justify-content:center;padding:16px;
    background:rgba(4,5,8,.72);backdrop-filter:blur(2px);opacity:0;transition:opacity .18s ease}
  .ld-mask.show{opacity:1}
  .ld-panel{position:relative;display:flex;flex-direction:column;width:min(920px,100%);max-height:calc(100vh - 32px);
    background:var(--bg);border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:0 1px 0 rgba(255,255,255,.04) inset,0 24px 64px -12px rgba(0,0,0,.7),0 8px 24px rgba(0,0,0,.35);
    transform:translateY(8px);transition:transform .18s ease}
  .ld-mask.show .ld-panel{transform:none}

  .ld-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 24px 0}
  .ld-title{font-size:16px;font-weight:600;letter-spacing:.02em;color:var(--text)}
  .ld-close{display:grid;place-items:center;width:32px;height:32px;border-radius:var(--r-sm);color:var(--text-2);
    border:1px solid transparent;transition:background .15s,color .15s,border-color .15s}
  .ld-close:hover{background:var(--surface);border-color:var(--line);color:var(--text)}
  .ld-close:active{background:var(--sunken)}
  .ld-game{margin:14px 24px 0;padding-bottom:18px;border-bottom:1px solid var(--line);font-size:16px;font-weight:600;line-height:1.45;color:var(--text);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;word-break:break-word}

  .ld-body{flex:1 1 auto;min-height:0;overflow:auto;padding:20px 24px}
  .ld-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-bottom:20px}
  .ld-secret{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;padding:12px 14px;text-align:left;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);transition:border-color .15s,background .15s}
  .ld-secret:hover{border-color:var(--line-2);background:#141922}
  .ld-secret:active{background:var(--sunken)}
  .ld-secret-k{display:block;font-size:12px;color:var(--text-3)}
  .ld-secret-v{display:block;margin-top:2px;font-family:var(--mono);font-size:15px;letter-spacing:.04em;color:var(--text);word-break:break-all}
  .ld-secret-i{color:var(--text-3);transition:color .15s}
  .ld-secret:hover .ld-secret-i{color:var(--text-2)}

  .ld-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
  @media (max-width:880px){.ld-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (max-width:600px){.ld-grid{grid-template-columns:minmax(0,1fr)}.ld-head,.ld-body{padding-left:16px;padding-right:16px}.ld-game{margin-left:16px;margin-right:16px}.ld-foot{padding-left:16px;padding-right:16px}}

  .ld-card{--brand:#4B8DFF;display:flex;flex-direction:column;gap:12px;min-width:0;padding:16px;
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);transition:border-color .15s}
  .ld-card:hover{border-color:var(--line-2)}
  .ld-card.baidu{--brand:#4B8DFF}.ld-card.quark{--brand:#9067F9}.ld-card.xunlei{--brand:#28B8E8}
  .ld-card-top{display:flex;align-items:center;gap:10px;min-width:0}
  .ld-ico{display:grid;place-items:center;width:36px;height:36px;flex:none;border-radius:var(--r-sm);background:var(--sunken);border:1px solid var(--line)}
  .ld-ico svg{width:24px;height:24px}
  .ld-name{min-width:0;flex:1}
  .ld-name b{display:block;font-size:14px;font-weight:600;color:var(--text)}
  .ld-name small{display:block;font-size:11px;letter-spacing:.08em;color:var(--text-3)}
  .ld-qrbtn{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 10px;border-radius:var(--r-sm);font-size:12px;color:var(--text-2);
    border:1px solid var(--line);background:var(--sunken);transition:color .15s,border-color .15s}
  .ld-qrbtn:hover,.ld-qrbtn[aria-expanded="true"]{color:var(--text);border-color:var(--line-2)}

  .ld-url{display:flex;gap:8px;align-items:flex-start;padding:10px 12px;min-height:62px;background:var(--sunken);border:1px solid var(--line);border-radius:var(--r-sm);
    font-family:var(--mono);font-size:12px;line-height:1.55;color:#C7CEDA;overflow-wrap:anywhere;word-break:break-all}
  .ld-url svg{margin-top:3px;color:var(--text-3)}
  .ld-url span{min-width:0}
  .ld-code{display:flex;align-items:center;gap:8px;height:24px;font-size:12px;color:var(--text-3)}
  .ld-code b{display:inline-flex;align-items:center;height:24px;padding:0 8px;border-radius:6px;font-family:var(--mono);font-size:13px;font-weight:600;letter-spacing:.08em;
    color:var(--text);background:color-mix(in srgb,var(--brand) 12%,transparent);border:1px solid color-mix(in srgb,var(--brand) 26%,transparent)}
  .ld-code i{font-style:normal;color:var(--text-3)}

  .ld-btns{display:grid;grid-template-columns:1.4fr 1fr;gap:8px;margin-top:auto}
  .ld-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;border-radius:var(--r-sm);font-size:13px;font-weight:600;
    transition:filter .15s,background .15s,border-color .15s,transform .12s}
  .ld-btn:active{transform:translateY(1px)}
  .ld-btn.primary{color:#fff;background:color-mix(in srgb,var(--brand) 82%,#0B0D12);border:1px solid color-mix(in srgb,var(--brand) 90%,#fff 10%)}
  .ld-btn.primary:hover{filter:brightness(1.1)}
  .ld-btn.secondary{color:var(--text);background:var(--surface);border:1px solid var(--line-2)}
  .ld-btn.secondary:hover{background:#171C26;border-color:rgba(255,255,255,.18)}
  .ld-btn[disabled],.ld-btn[aria-disabled="true"]{opacity:.4;pointer-events:none}
  .ld-card.off .ld-ico{filter:grayscale(1);opacity:.55}
  .ld-card.off .ld-url{color:var(--text-3);font-family:var(--sans)}

  .ld-foot{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px 16px;padding:12px 24px 16px;border-top:1px solid var(--line);font-size:12px;color:var(--text-3)}
  .ld-actions{display:flex;flex-wrap:wrap;gap:4px}
  .ld-act{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 10px;border-radius:var(--r-sm);color:var(--text-2);transition:background .15s,color .15s}
  .ld-act:hover{background:var(--surface);color:var(--text)}
  .ld-act:active{background:var(--sunken)}

  .ld-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;min-height:240px;text-align:center;color:var(--text-2)}
  .ld-spin{width:22px;height:22px;border-radius:50%;border:2px solid var(--line-2);border-top-color:var(--accent);animation:ld-spin .8s linear infinite}
  @keyframes ld-spin{to{transform:rotate(360deg)}}
  .ld-state.err{color:#E58A9B}
  .ld-state.err p{margin:0;max-width:420px;color:var(--text-2)}
  .ld-state .ld-btns{width:min(320px,100%);margin-top:4px}

  .ld-pop{position:fixed;z-index:2147483646;padding:12px 12px 10px;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r-md);
    box-shadow:0 16px 40px rgba(0,0,0,.55);opacity:0;transform:translateY(4px);pointer-events:none;transition:opacity .15s,transform .15s;text-align:center}
  .ld-pop.show{opacity:1;transform:none}
  .ld-pop-img{display:grid;place-items:center;width:176px;height:176px;padding:10px;background:#fff;border-radius:var(--r-sm)}
  .ld-pop-img img{display:block;width:156px;height:156px;image-rendering:pixelated}
  .ld-pop-img .ld-spin{border-color:#E3E6EB;border-top-color:#4B8DFF}
  .ld-pop-err{font-size:12px;color:var(--text-3)}
  .ld-pop-cap{margin-top:8px;font-size:12px;color:var(--text-2)}

  .ld-toast{position:fixed;left:50%;bottom:40px;z-index:2147483647;display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:var(--r-sm);
    font-size:13px;color:var(--text);background:#151A23;border:1px solid var(--line-2);box-shadow:0 10px 30px rgba(0,0,0,.45);
    transform:translate(-50%,6px);opacity:0;transition:opacity .15s,transform .15s;pointer-events:none}
  .ld-toast svg{color:#5FD08A}
  .ld-toast.show{opacity:1;transform:translate(-50%,0)}

  .ld-trigger{display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 16px;margin:0 0 12px;border-radius:10px;font-size:13px;font-weight:600;letter-spacing:.04em;
    color:#E8EDF5;background:#11151D;border:1px solid rgba(255,255,255,.12);box-shadow:0 4px 14px rgba(0,0,0,.25);transition:background .15s,border-color .15s}
  .ld-trigger:hover{background:#171C26;border-color:rgba(255,255,255,.2)}
  .ld-trigger i{width:6px;height:6px;border-radius:50%;background:#4B8DFF}

  .ld-hint{margin:0 0 12px;font-size:12px;color:var(--text-2)}
  .ld-hint:empty{display:none}
  .ld-sk{display:block;height:10px;border-radius:4px;background:linear-gradient(90deg,#151a23 0%,#1b212c 50%,#151a23 100%);background-size:200% 100%;animation:ld-shimmer 1.4s ease-in-out infinite}
  @keyframes ld-shimmer{from{background-position:100% 0}to{background-position:-100% 0}}
  .ld-card.sk .ld-url{flex-direction:column;gap:8px;justify-content:center}
  .ld-card.sk .ld-btn{pointer-events:none;opacity:.35}
  @media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation-duration:1.5s!important}}
  `;


    const LOGO = {
        baidu: '<svg viewBox="0 0 100 100" width="100" height="100" xmlns="http://www.w3.org/2000/svg" aria-hidden="true"><path fill="#3B8CFF" d="M88.6,46.1c-4.6-4.6-10.8-6.7-16.8-6.3c0.4-6-1.7-12.2-6.3-16.8c-8.5-8.5-22.4-8.5-30.9,0c-4.6,4.6-6.7,10.8-6.3,16.8c-6-0.4-12.2,1.7-16.8,6.3c-8.5,8.5-8.5,22.4,0,30.9s22.4,8.5,30.9,0l14.3-14.3l1.1-1.1l7.7-7.7c4.3-4.3,11.2-4.3,15.4,0s4.3,11.2,0,15.4c-4.3,4.3-11.2,4.3-15.4,0c-2.1-2.1-5.6-2.1-7.7,0s-2.1,5.6,0,7.7c8.5,8.5,22.4,8.5,30.9,0C97.1,68.5,97.1,54.7,88.6,46.1z M19.1,69.3c-4.3-4.3-4.3-11.2,0-15.4c4.3-4.3,11.2-4.3,15.4,0s4.3,11.2,0,15.4C30.3,73.6,23.4,73.6,19.1,69.3z M42.3,46.1C38,41.9,38,35,42.3,30.7c4.3-4.3,11.2-4.3,15.4,0s4.3,11.2,0,15.4C53.5,50.4,46.5,50.4,42.3,46.1z"/></svg>',
        quark: '<svg viewBox="0 0 46 46" width="46" height="46" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true"><path d="M23.33 5c7.35 0 13.502 5.594 14.328 12.928l-.011-.075.088.033c4.222 1.631 7.122 5.688 7.26 10.335l.004.161.001.186C45 34.88 39.943 40 33.704 40h-3.587a2.44 2.44 0 0 1-1.72-.724 2.45 2.45 0 0 1-.708-1.733c0-1.358 1.088-2.458 2.428-2.458h3.587c3.557 0 6.440-2.918 6.44-6.517s-2.884-6.516-6.44-6.516q-.617 0-.962.077.151-.76.152-2.535c0-5.345-4.282-9.679-9.565-9.679-5.125 0-9.333 4.089-9.555 9.25l-.018.458-.439-.111-4.038-1.026-.279-.07v-.448l.002-.042c.815-7.245 6.837-12.804 14.092-12.924L23.326 5z" fill="#0d53ff"/><path d="M12.362 17c6.274 0 11.361 5.15 11.361 11.5 0 .964-.118 1.923-.354 2.857a2.47 2.47 0 0 1-1.12 1.515 2.44 2.44 0 0 1-1.86.272 2.47 2.47 0 0 1-1.502-1.142 2.5 2.5 0 0 1-.263-1.874 6.6 6.6 0 0 0 .2-1.627c0-3.614-2.893-6.543-6.462-6.543S5.899 24.887 5.899 28.5s2.893 6.542 6.463 6.542h11.19c1.35 0 2.448 1.11 2.448 2.48a2.48 2.48 0 0 1-.714 1.748 2.46 2.46 0 0 1-1.736.73H12.363C6.087 40 1 34.85 1 28.5S6.087 17 12.362 17" fill="url(#ld-quark-g)"/><defs><linearGradient id="ld-quark-g" x1=".824" y1="17.038" x2="26.259" y2="40.262" gradientUnits="userSpaceOnUse"><stop offset=".273" stop-color="#00bdff"/><stop offset="1" stop-color="#00fd35"/></linearGradient></defs></svg>',
        xunlei: '<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg" aria-hidden="true"><rect width="200" height="200" rx="32" fill="#4080F9"/><path fill="#fff" d="M28 55 58 66 85 78Q111 54 160 38L143 67 147 66 127 97 168 111 111 123 132 170Q112 148 91 138C69 127 57 111 57 94 59 81 49 68 28 55Z"/></svg>',
    };

    const DISKS = [
        { key: 'baidu', name: '百度网盘', en: 'BAIDU PAN' },
        { key: 'quark', name: '夸克网盘', en: 'QUARK' },
        { key: 'xunlei', name: '迅雷云盘', en: 'THUNDER' },
    ];

    const esc = (s) => String(s ?? '').replace(/[&<>"']/g, (c) => `&#${c.charCodeAt(0)};`);

    const el = (className, attrs = {}) => {
        const node = document.createElement('div');
        node.className = className;
        for (const [k, v] of Object.entries(attrs)) node.setAttribute(k, v);
        return node;
    };

    const makeHost = (id) => {
        const host = document.createElement('div');
        host.id = id;
        const root = host.attachShadow({ mode: 'open' });
        const style = document.createElement('style');
        style.textContent = CSS;
        const wrap = el('ld');
        root.append(style, wrap);
        return { host, wrap };
    };

    const UI = makeHost('loot-drop-root');
    document.documentElement.append(UI.host);

    let toastEl, toastTimer;
    const toast = (msg) => {
        toastEl ??= UI.wrap.appendChild(el('ld-toast', { role: 'status' }));
        toastEl.innerHTML = `${ICON.check}<span>${esc(msg)}</span>`;
        toastEl.classList.add('show');
        clearTimeout(toastTimer);
        toastTimer = setTimeout(() => toastEl.classList.remove('show'), 1600);
    };

    const copy = (text, label) => {
        try { GM_setClipboard(text, 'text'); } catch { navigator.clipboard?.writeText(text); }
        toast(label ? `已复制 · ${label}` : '已复制');
    };

    let mask = null, body = null, lastFocus = null, view = null, runToken = 0;
    let pop = null, popOwner = null;

    const setStatus = (text) => {
        const hint = mask?.querySelector('.ld-hint');
        if (hint) hint.textContent = text;
    };

    const dropFoot = () => mask?.querySelector('.ld-foot')?.remove();

    const placePop = (btn) => {
        const { top, right, bottom } = btn.getBoundingClientRect();
        const w = 202, h = 230, gap = 8;
        pop.style.left = `${Math.min(Math.max(8, right - w), innerWidth - w - 8)}px`;
        pop.style.top = `${top - h - gap < 8 ? bottom + gap : top - h - gap}px`;
    };

    const hideQr = () => {
        popOwner?.setAttribute('aria-expanded', 'false');
        popOwner = null;
        pop?.classList.remove('show');
    };

    const showQr = (btn) => {
        const { key, name } = DISKS.find((d) => d.key === btn.dataset.qr);
        const item = view?.data?.[key];
        if (!item) return;
        pop ??= UI.wrap.appendChild(el('ld-pop', { role: 'tooltip' }));
        popOwner?.setAttribute('aria-expanded', 'false');
        popOwner = btn;
        btn.setAttribute('aria-expanded', 'true');
        pop.innerHTML = `<div class="ld-pop-img"><div class="ld-spin"></div></div><div class="ld-pop-cap">手机扫码 · ${name}</div>`;
        placePop(btn);
        pop.classList.add('show');
        loadQr(item).then((src) => {
            if (popOwner !== btn) return;
            const box = pop.querySelector('.ld-pop-img');
            const img = Object.assign(new Image(), { alt: `${name}二维码`, referrerPolicy: 'no-referrer' });
            img.onload = () => popOwner === btn && box.replaceChildren(img);
            img.onerror = () => popOwner === btn && (box.innerHTML = '<span class="ld-pop-err">二维码加载失败</span>');
            img.src = src;
        });
    };

    const cardTop = ({ key, name, en }, qr = false) => `
    <div class="ld-card-top">
      <div class="ld-ico" aria-hidden="true">${LOGO[key]}</div>
      <div class="ld-name"><b>${name}</b><small>${en}</small></div>
      ${qr ? `<button class="ld-qrbtn" type="button" data-qr="${key}" aria-expanded="false" aria-label="${name}扫码">${ICON.qr}<span>扫码</span></button>` : ''}
    </div>`;

    const skeletonCard = (disk) => `
    <div class="ld-card sk ${disk.key}" aria-hidden="true">${cardTop(disk)}
      <div class="ld-url"><span class="ld-sk" style="width:100%"></span><span class="ld-sk" style="width:72%"></span></div>
      <div class="ld-code"><span>提取码</span><span class="ld-sk" style="width:48px;height:14px"></span></div>
      <div class="ld-btns"><span class="ld-btn primary">${ICON.open}打开</span><span class="ld-btn secondary">${ICON.copy}复制</span></div>
    </div>`;

    const cardHTML = (disk) => {
        const it = view.data[disk.key];
        if (!it) {
            return `
        <div class="ld-card ${disk.key} off">${cardTop(disk)}
          <div class="ld-url"><span>该资源未提供此网盘</span></div>
          <div class="ld-code"><span>提取码</span><i>—</i></div>
          <div class="ld-btns"><span class="ld-btn primary" aria-disabled="true">${ICON.open}打开</span><button class="ld-btn secondary" type="button" disabled>${ICON.copy}复制</button></div>
        </div>`;
        }
        const url = esc(it.url);
        return `
      <div class="ld-card ${disk.key}">${cardTop(disk, true)}
        <div class="ld-url" title="${url}">${ICON.link}<span>${url}</span></div>
        <div class="ld-code"><span>提取码</span>${it.pwd ? `<b>${esc(it.pwd)}</b>` : '<i>无需提取码</i>'}</div>
        <div class="ld-btns">
          <a class="ld-btn primary" href="${url}" target="_blank" rel="noopener noreferrer">${ICON.open}打开</a>
          <button class="ld-btn secondary" type="button" data-copy="${url}" data-label="${disk.name}">${ICON.copy}复制</button>
        </div>
      </div>`;
    };

    const secretHTML = ([label, value]) => `
    <button class="ld-secret" type="button" data-copy="${esc(value)}" data-label="${label}" title="点击复制${label}">
      <span><span class="ld-secret-k">${label}</span><span class="ld-secret-v">${esc(value)}</span></span>
      <span class="ld-secret-i">${ICON.copy}</span>
    </button>`;

    const copyAll = () => {
        const { ctx, data } = view;
        const lines = [
            ctx.title,
            ...DISKS.flatMap(({ key, name }) => {
                const it = data[key];
                return it ? [`${name}: ${it.url}${it.pwd ? `  提取码: ${it.pwd}` : ''}`] : [];
            }),
            ctx.filePwd && `文件密码: ${ctx.filePwd}`,
            data.unzip && `解压密码: ${data.unzip}`,
        ];
        copy(lines.filter(Boolean).join('\n'), '全部链接');
    };

    const ACTIONS = {
        close: () => closePanel(),
        all: copyAll,
        refresh: () => run(view.ctx, true),
        retry: () => run(view.ctx, true),
    };

    const onPanelClick = (e) => {
        if (e.target === mask) return closePanel();
        const target = e.target.closest('[data-copy], [data-qr], [data-act]');
        if (!target) return;
        const { copy: text, label, qr, act } = target.dataset;
        if (text !== undefined) copy(text, label);
        else if (qr) popOwner === target ? hideQr() : showQr(target);
        else ACTIONS[act]?.();
    };

    const onQrEnter = (e) => {
        const btn = e.target.closest('[data-qr]');
        if (btn && btn !== popOwner) showQr(btn);
    };

    const onQrLeave = (e) => {
        const btn = e.target.closest('[data-qr]');
        if (btn && !btn.contains(e.relatedTarget)) hideQr();
    };

    const openPanel = (title) => {
        closePanel(true);
        lastFocus = document.activeElement;
        mask = UI.wrap.appendChild(el('ld-mask'));
        mask.innerHTML = `
      <div class="ld-panel" role="dialog" aria-modal="true" aria-labelledby="ld-title">
        <div class="ld-head">
          <div class="ld-title" id="ld-title">下载链接</div>
          <button class="ld-close" type="button" data-act="close" title="关闭 (Esc)" aria-label="关闭">${ICON.close}</button>
        </div>
        <div class="ld-game" title="${esc(title)}">${esc(title)}</div>
        <div class="ld-body"></div>
      </div>`;
        body = mask.querySelector('.ld-body');
        body.addEventListener('scroll', hideQr, { passive: true });
        mask.addEventListener('click', onPanelClick);
        mask.addEventListener('mouseover', onQrEnter);
        mask.addEventListener('mouseout', onQrLeave);
        mask.addEventListener('focusin', onQrEnter);
        mask.addEventListener('focusout', onQrLeave);
        requestAnimationFrame(() => mask?.classList.add('show'));
        mask.querySelector('.ld-close').focus({ preventScroll: true });
    };

    const closePanel = (instant = false) => {
        hideQr();
        runToken++;
        if (!mask) return;
        const m = mask;
        mask = body = null;
        if (instant) return m.remove();
        m.classList.remove('show');
        setTimeout(() => m.remove(), 180);
        lastFocus?.focus?.({ preventScroll: true });
    };

    const showLoading = () => {
        dropFoot();
        body.innerHTML = `<div class="ld-hint" aria-live="polite"></div><div class="ld-grid" aria-busy="true">${DISKS.map(skeletonCard).join('')}</div>`;
    };

    const renderResult = ({ data, page, ts }) => {
        hideQr();
        const { ctx } = view;
        view = { ctx, data };
        const secrets = [['文件密码', ctx.filePwd], ['解压密码', data.unzip]].filter(([, v]) => v).map(secretHTML).join('');
        body.innerHTML = `${secrets && `<div class="ld-meta">${secrets}</div>`}<div class="ld-grid">${DISKS.map(cardHTML).join('')}</div>`;

        const age = ctx.inline ? 0 : Math.round((Date.now() - ts) / 60e3);
        const foot = mask.querySelector('.ld-foot') ?? mask.querySelector('.ld-panel').appendChild(el('ld-foot'));
        foot.innerHTML = `
      <span>${age > 0 ? `缓存于 ${age} 分钟前 · ` : ''}点击密码即可复制</span>
      <div class="ld-actions">
        <button class="ld-act" type="button" data-act="all">${ICON.stack}复制全部</button>
        <button class="ld-act" type="button" data-act="refresh">${ICON.refresh}重新解析</button>
        <a class="ld-act" href="${esc(page || ctx.goUrl)}" target="_blank" rel="noopener">${ICON.open}原始页面</a>
      </div>`;

        for (const { key } of DISKS) if (data[key]) loadQr(data[key]);
    };

    const renderError = (err) => {
        dropFoot();
        body.innerHTML = `
      <div class="ld-state err" role="alert">${ICON.alert}
        <p>解析失败：${esc(err.message ?? err)}</p>
        <div class="ld-btns">
          <button class="ld-btn primary" type="button" data-act="retry">${ICON.refresh}重试</button>
          <a class="ld-btn secondary" href="${esc(view.ctx.goUrl)}" target="_blank" rel="noopener">${ICON.open}原始跳转</a>
        </div>
      </div>`;
    };

    const run = async (ctx, force = false) => {
        if (!mask) openPanel(ctx.title);
        const token = ++runToken;
        view = { ctx, data: {} };
        hideQr();

        if (ctx.inline) {
            const data = extractLinks(document);
            return hasAny(data)
                ? renderResult({ data, page: location.href, ts: Date.now() })
                : renderError(new Error('页面网盘区块中未找到链接'));
        }

        const cached = !force && readCache(ctx.id);
        if (cached) return renderResult(cached);

        showLoading();
        try {
            const entry = await fetchLinks(ctx, true);
            if (mask && token === runToken) renderResult(entry);
        } catch (e) {
            console.error('[G520]', e);
            if (mask && token === runToken) renderError(e);
        }
    };

    const pageTitle = () => document.querySelector('h1.entry-title, .article-title, .entry-header h1, article h1, h1')?.textContent.trim() || document.title;

    const findFilePwd = (scope) => {
        const text = `${scope?.textContent ?? ''} ${document.querySelector('.pay-box, .widget-area, aside')?.textContent ?? ''}`;
        return text.match(/文件密码\s*[:：]\s*([\w.-]+)/)?.[1] ?? '';
    };

    const pageId = () => location.pathname.match(/(\d+)\.html/)?.[1] ?? location.pathname;

    const inlineAvailable = () => Boolean(document.querySelector(BLOCK_SEL)) && hasAny(extractLinks(document));

    const inlineCtx = (anchor) => ({
        inline: true,
        goUrl: location.href,
        id: `inline-${pageId()}`,
        filePwd: findFilePwd(anchor?.parentElement),
        title: pageTitle(),
    });

    const goCtx = (a) => {
        const goUrl = new URL(a.getAttribute('href'), location.href).href;
        return {
            inline: false,
            goUrl,
            id: new URL(goUrl).searchParams.get('post_id') || pageId(),
            filePwd: findFilePwd(a.closest('.pay-box, .widget, aside, div') ?? a.parentElement),
            title: pageTitle(),
        };
    };

    document.addEventListener('keydown', (e) => {
        if (e.key === 'Escape' && mask) closePanel();
    });

    document.addEventListener('click', (e) => {
        if (e.button !== 0 || e.ctrlKey || e.metaKey || e.shiftKey || e.altKey) return;
        const a = e.target.closest?.(GO_SEL);
        if (!a) return;
        e.preventDefault();
        e.stopImmediatePropagation();
        run(inlineAvailable() ? inlineCtx(a) : goCtx(a));
    }, true);

    const mountTrigger = () => {
        const block = document.querySelector(BLOCK_SEL);
        if (!block || document.getElementById('loot-drop-trigger') || document.querySelector(GO_SEL)) return;
        if (!hasAny(extractLinks(document))) return;
        const { host, wrap } = makeHost('loot-drop-trigger');
        host.style.display = 'block';
        wrap.innerHTML = '<button class="ld-trigger" type="button"><i></i>LOOT DROP · 一键提取网盘链接</button>';
        wrap.firstElementChild.addEventListener('click', () => run(inlineCtx(null)));
        block.before(host);
    };

    let prefetched = false;
    const prefetch = () => {
        if (prefetched) return;
        const a = document.querySelector(GO_SEL);
        if (!a || inlineAvailable()) return;
        const ctx = goCtx(a);
        if (readCache(ctx.id)) return;
        prefetched = true;
        fetchLinks(ctx, false).catch((e) => console.info('[G520] 预取未完成，点击时再解析：', e.message));
    };

    mountTrigger();

    if (PREFETCH) {
        'requestIdleCallback' in window ? requestIdleCallback(prefetch, { timeout: 3000 }) : setTimeout(prefetch, 1200);
        for (const type of ['pointerover', 'focusin', 'touchstart']) {
            document.addEventListener(type, (e) => e.target.closest?.(GO_SEL) && prefetch(), { capture: true, passive: true });
        }
    }

    if (!document.querySelector(BLOCK_SEL)) {
        const observer = new MutationObserver(() => {
            if (!document.querySelector(BLOCK_SEL)) return;
            observer.disconnect();
            mountTrigger();
        });
        observer.observe(document.body, { childList: true, subtree: true });
        setTimeout(() => observer.disconnect(), 15e3);
    }
})();