// ==UserScript==
// @name         交叉口流量增强工具
// @namespace    http://tampermonkey.net/
// @version      1.0.0
// @description  IsVip=1, Canvas"试用"隐藏, 删除激活弹窗
// @author       xiansi
// @match        https://www.roadgee.com/*
// @run-at       document-start
// @grant        none
// @license      GPL
// ==/UserScript==

(function () {
    'use strict';

    // ================================================================
    //  1. VIP 解锁
    // ================================================================
    Object.defineProperty(window, 'IsVip', {
        get: function () { return 1; },
        set: function () {},
        configurable: false,
        enumerable: true
    });

    // ================================================================
    //  2. Canvas "试用" 水印隐藏
    // ================================================================
    function sanitize(text) {
        if (typeof text === 'string' && /试用/.test(text)) {
            return text.replace(/./g, ' ');
        }
        return text;
    }

    function patchCtx(proto) {
        if (!proto) return;
        var _ft = proto.fillText;
        var _st = proto.strokeText;
        var _mt = proto.measureText;

        proto.fillText = function (text, x, y, maxW) {
            text = sanitize(text);
            return maxW !== undefined
                ? _ft.call(this, text, x, y, maxW)
                : _ft.call(this, text, x, y);
        };

        proto.strokeText = function (text, x, y, maxW) {
            text = sanitize(text);
            return maxW !== undefined
                ? _st.call(this, text, x, y, maxW)
                : _st.call(this, text, x, y);
        };

        proto.measureText = function (text) {
            return _mt.call(this, sanitize(text));
        };
    }

    patchCtx(CanvasRenderingContext2D.prototype);
    if (typeof OffscreenCanvasRenderingContext2D !== 'undefined') {
        patchCtx(OffscreenCanvasRenderingContext2D.prototype);
    }

    // ================================================================
    //  3. 删除激活弹窗 #activeCodeBox
    // ================================================================

    document.addEventListener('DOMContentLoaded', function () {
        var el = document.getElementById('activeCodeBox');
        if (el) el.remove();
        console.log('[roadgee增强] IsVip =', window.IsVip);
    });

    // 如果被 JS 动态重新插入，再次删除
    new MutationObserver(function (mutations) {
        for (var i = 0; i < mutations.length; i++) {
            var nodes = mutations[i].addedNodes;
            for (var j = 0; j < nodes.length; j++) {
                var n = nodes[j];
                if (n.nodeType !== 1) continue;
                if (n.id === 'activeCodeBox') { n.remove(); continue; }
                if (n.querySelector && n.querySelector('#activeCodeBox')) {
                    var found = n.querySelector('#activeCodeBox');
                    if (found) found.remove();
                }
            }
        }
    }).observe(document.documentElement, { childList: true, subtree: true });

    console.log('[roadgee增强] 已启动 v1.0.0');
})();