// ==UserScript==
// @name         网易云音乐
// @namespace    http://tampermonkey.net/
// @version      27.0
// @description  解锁网页完全歌单，来自公开音源
// @author       YourName & Gemini
// @match        *://music.163.com/*
// @grant        GM_xmlhttpRequest
// @grant        unsafeWindow
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    // --- 新增: 设置Cookie ---
    // 强制将 os cookie 设置为 'pc'，以获取桌面端体验
    document.cookie = 'os=pc; domain=.music.163.com; path=/; max-age=31536000';

    function log(message, ...args) {
        console.log(`[NCM Unlocker v27.0]`, message, ...args);
    }

    // --- API注入 ---
    const APIHooker = {
        hooks: [],
        originalOpen: XMLHttpRequest.prototype.open,
        originalSend: XMLHttpRequest.prototype.send,

        hook: function(urlMatcher, dealer) {
            this.hooks.push({ matcher: urlMatcher, dealer: dealer });
        },

        init: function() {
            const self = this;
            XMLHttpRequest.prototype.open = function(method, url, ...args) {
                this._hook = self.hooks.find(h => h.matcher.test(url));
                return self.originalOpen.apply(this, [method, url, ...args]);
            };

            XMLHttpRequest.prototype.send = function(...sendArgs) {
                if (this._hook) {
                    const hook = this._hook;
                    let originalOnReadyStateChange = this.onreadystatechange;

                    this.onreadystatechange = function(...progressArgs) {
                        if (this.readyState === 4 && this.status === 200) {
                            hook.dealer(this, originalOnReadyStateChange, progressArgs);
                        } else if (originalOnReadyStateChange) {
                            originalOnReadyStateChange.apply(this, progressArgs);
                        }
                    };
                }
                return self.originalSend.apply(this, sendArgs);
            };
        }
    };


    // --- 核心逻辑 ---
    function main() {
        APIHooker.init();
        log('Cookie "os=pc" 已设置，注入器已初始化。');

        const requestState = {};

        // --- 按钮绕过 ---
        APIHooker.hook(
            /\/weapi\/(v3\/song\/detail|v1\/play\/record|v6\/playlist\/detail)/,
            (xhr, originalCallback, callbackArgs) => {
                try {
                    let data = JSON.parse(xhr.responseText);
                    let privilegesModified = false;
                    const fixPrivilege = (p) => {
                        if (p && (p.st !== 0 || p.fee > 0 || p.pl === 0)) {
                            p.st = 0; p.fee = 0; p.pl = 320000; p.dl = 320000;
                            p.plLevel = 'exhigh'; p.dlLevel = 'exhigh';
                            privilegesModified = true;
                        }
                    };
                    if (data.privileges) data.privileges.forEach(fixPrivilege);
                    if (data.songs) data.songs.forEach(s => s.privilege && fixPrivilege(s.privilege));
                    if (data.allData) data.allData.forEach(d => d.song && d.song.privilege && fixPrivilege(d.song.privilege));
                    if (data.weekData) data.weekData.forEach(d => d.song && d.song.privilege && fixPrivilege(d.song.privilege));

                    if (privilegesModified) {
                        const modifiedText = JSON.stringify(data);
                        Object.defineProperty(xhr, 'responseText', { value: modifiedText, writable: true });
                    }
                } catch(e) { /* Silent fail */ }

                if (originalCallback) originalCallback.apply(xhr, callbackArgs);
            }
        );

        // --- 注入 ---
        APIHooker.hook(/\/weapi\/song\/enhance\/player\/url\/v1/, (xhr, originalCallback, callbackArgs) => {
            let originalResponse;
            try { originalResponse = JSON.parse(xhr.responseText); } catch (e) {
                if (originalCallback) originalCallback.apply(xhr, callbackArgs); return;
            }

            const songData = originalResponse.data[0];
            if (!songData || !songData.id || (songData.url && songData.code === 200)) {
                if (originalCallback) originalCallback.apply(xhr, callbackArgs); return;
            }

            if (requestState[songData.id] === 'processing') return;
            requestState[songData.id] = 'processing';

            GM_xmlhttpRequest({
                method: 'GET',
                url: `https://wyy-api-three.vercel.app/song/url?id=${songData.id}&quality=320k`,
                onload: function(response) {
                    try {
                        if (response.status === 200) {
                            const customData = JSON.parse(response.responseText);
                            const customUrl = customData.url;
                            if (customUrl) {
                                const fakeResponse = {
                                    data: [{ ...songData, url: customUrl, br: 320000, code: 200, type: 'mp3', fee: 0, md5: '0', level: 'exhigh', flag: 0 }],
                                    code: 200
                                };
                                const fakeResponseText = JSON.stringify(fakeResponse);
                                Object.defineProperty(xhr, 'responseText', { value: fakeResponseText, writable: true });
                                log(`✅ 音源注入成功 (ID: ${songData.id})`);
                            }
                        }
                    } catch (e) { /* Silent fail */ }
                    if (originalCallback) originalCallback.apply(xhr, callbackArgs);
                    setTimeout(() => delete requestState[songData.id], 500);
                },
                onerror: function(e) {
                    if (originalCallback) originalCallback.apply(xhr, callbackArgs);
                    setTimeout(() => delete requestState[songData.id], 500);
                }
            });
        });
    }

    if (document.body) { main(); } else { new MutationObserver((_, obs) => { if (document.body) { obs.disconnect(); main(); } }).observe(document.documentElement, { childList: true }); }
})();