// ==UserScript==
// @name         鐢靛晢姣斾环鍔╂墜 - 鍘嗗彶浠锋牸鏌ヨ
// @namespace    https://greasyfork.org/users/smarttools
// @version      1.0.0
// @description  娣樺疂/浜笢/鎷煎澶?1688鍟嗗搧鍘嗗彶浠锋牸鏌ヨ锛屼竴閿悳绱㈠悓娆炬渶浣庝环锛岃嚜鍔ㄩ闅愯棌浼樻儬鍒?// @author       SmartTools
// @match        *://*.taobao.com/*
// @match        *://*.tmall.com/*
// @match        *://*.jd.com/*
// @match        *://*.pinduoduo.com/*
// @match        *://*.yangkeduo.com/*
// @match        *://*.1688.com/*
// @match        *://*.suning.com/*
// @icon         data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNjQiIGhlaWdodD0iNjQiIHZpZXdCb3g9IjAgMCA2NCA2NCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48Y2lyY2xlIGN4PSIzMiIgY3k9IjMyIiByPSIzMCIgZmlsbD0iI0ZGNTcyOCIvPjxwYXRoIGQ9Ik0yMCAyOEgzNE0yMCAzMkg0ME0yMCAzNkg0NE0yMCA0MEg0OCIgc3Ryb2tlPSJ3aGl0ZSIgc3Ryb2tlLXdpZHRoPSIzIiBzdHJva2UtbGluZWNhcD0icm91bmQiLz48L3N2Zz4=
// @grant        GM_xmlhttpRequest
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_addStyle
// @grant        GM_notification
// @connect      api.manmanbuy.com
// @connect      api.gwdang.com
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    var CONFIG = {
        apiEndpoint: 'https://api.manmanbuy.com/historyLowest.aspx',
        platforms: {
            taobao: { name: '娣樺疂', color: '#FF4400', domain: 'taobao.com' },
            tmall: { name: '澶╃尗', color: '#FF0036', domain: 'tmall.com' },
            jd: { name: '浜笢', color: '#E1251B', domain: 'jd.com' },
            pdd: { name: '鎷煎澶?, color: '#E02E24', domain: 'pinduoduo.com' },
            ali1688: { name: '1688', color: '#FF6A00', domain: '1688.com' }
        },
        priceAlert: {
            enabled: true,
            threshold: 0.1
        }
    };

    GM_addStyle([
        '#smart-price-panel {',
        '  position: fixed; top: 80px; right: 20px; width: 360px;',
        '  background: white; border-radius: 12px;',
        '  box-shadow: 0 8px 32px rgba(0,0,0,0.12);',
        '  z-index: 99999;',
        '  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;',
        '  transition: all 0.3s ease; overflow: hidden;',
        '}',
        '#smart-price-panel.collapsed { width: 48px; height: 48px; border-radius: 24px; }',
        '#smart-price-panel.collapsed .panel-content { display: none; }',
        '#smart-price-panel .panel-header {',
        '  background: linear-gradient(135deg, #FF5728 0%, #FF8A5C 100%);',
        '  color: white; padding: 14px 16px;',
        '  display: flex; justify-content: space-between; align-items: center; cursor: move;',
        '}',
        '#smart-price-panel .panel-header h3 { margin: 0; font-size: 15px; font-weight: 600; }',
        '#smart-price-panel .panel-toggle {',
        '  background: rgba(255,255,255,0.2); border: none; color: white;',
        '  width: 24px; height: 24px; border-radius: 50%; cursor: pointer;',
        '  display: flex; align-items: center; justify-content: center;',
        '}',
        '#smart-price-panel .panel-content { padding: 16px; }',
        '.price-info { background: #FFF8F5; border-radius: 8px; padding: 12px; margin-bottom: 12px; }',
        '.price-current { font-size: 28px; font-weight: bold; color: #FF5728; }',
        '.price-lowest { font-size: 13px; color: #666; margin-top: 4px; }',
        '.price-lowest span { color: #00B578; font-weight: 500; }',
        '.price-badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; margin-left: 8px; }',
        '.badge-low { background: #D4F5E9; color: #00B578; }',
        '.badge-high { background: #FFE8E0; color: #FF3141; }',
        '.badge-normal { background: #F5F5F5; color: #666; }',
        '.chart-container { height: 120px; margin: 12px 0; position: relative; }',
        '.search-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-top: 12px; }',
        '.search-link {',
        '  display: flex; align-items: center; justify-content: center;',
        '  padding: 10px; background: #F5F5F5; border-radius: 6px;',
        '  text-decoration: none; color: #333; font-size: 13px; transition: all 0.2s;',
        '}',
        '.search-link:hover { background: #FF5728; color: white; }',
        '.coupon-section {',
        '  background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);',
        '  border-radius: 8px; padding: 12px; margin-top: 12px;',
        '}',
        '.coupon-btn {',
        '  background: #FF5728; color: white; border: none;',
        '  padding: 8px 16px; border-radius: 6px; cursor: pointer;',
        '  font-size: 13px; width: 100%; margin-top: 8px;',
        '}',
        '.coupon-btn:hover { background: #E64A19; }',
        '.alert-btn {',
        '  background: none; border: 1px solid #FF5728; color: #FF5728;',
        '  padding: 8px 16px; border-radius: 6px; cursor: pointer;',
        '  font-size: 13px; width: 100%; margin-top: 8px;',
        '}',
        '.alert-btn:hover { background: #FFF3F0; }',
        '.loading { text-align: center; color: #999; padding: 20px; }',
        '@keyframes spin { to { transform: rotate(360deg); } }',
        '.footer-links { margin-top: 12px; text-align: center; font-size: 11px; color: #999; }',
        '.footer-links a { color: #FF5728; text-decoration: none; }'
    ].join('\n'));

    function getPlatform() {
        var url = window.location.href;
        var keys = Object.keys(CONFIG.platforms);
        for (var i = 0; i < keys.length; i++) {
            var key = keys[i];
            var cfg = CONFIG.platforms[key];
            if (url.indexOf(cfg.domain) !== -1) {
                return { key: key, name: cfg.name, color: cfg.color, domain: cfg.domain };
            }
        }
        return null;
    }

    function extractProductId() {
        var url = window.location.href;
        var platform = getPlatform();
        if (!platform) return null;
        var patterns = {
            taobao: /id=(\d+)/,
            tmall: /id=(\d+)/,
            jd: /(\d+)\.html/,
            pdd: /goods_id=(\d+)/,
            ali1688: /offer\/(\d+)/
        };
        var pat = patterns[platform.key];
        if (!pat) return null;
        var m = url.match(pat);
        return m ? m[1] : null;
    }

    function extractProductInfo() {
        var platform = getPlatform();
        if (!platform) return null;
        var title = '';
        var price = 0;

        if (platform.key === 'taobao' || platform.key === 'tmall') {
            var tEl = document.querySelector('.tb-detail-hd h1') || document.querySelector('[class*="title"]');
            title = tEl ? tEl.textContent.trim() : document.title;
            var pEl = document.querySelector('.tm-price') || document.querySelector('[class*="price"]');
            if (pEl) price = parseFloat(pEl.textContent.replace(/[^\d.]/g, ''));
        } else if (platform.key === 'jd') {
            var tEl2 = document.querySelector('.sku-name');
            title = tEl2 ? tEl2.textContent.trim() : document.title;
            var pEl2 = document.querySelector('.p-price .price');
            if (pEl2) price = parseFloat(pEl2.textContent.replace(/[^\d.]/g, ''));
        } else if (platform.key === 'pdd') {
            title = document.title;
            var pEl3 = document.querySelector('[class*="price"]');
            if (pEl3) price = parseFloat(pEl3.textContent.replace(/[^\d.]/g, ''));
        } else {
            title = document.title;
        }

        return { platform: platform, title: title, price: price || 0, id: extractProductId() };
    }

    function formatPrice(p) {
        return '\u00a5' + (p || 0).toFixed(2);
    }

    function getPriceStatus(current, lowest) {
        if (!lowest || lowest === 0) return { text: '\u67e5\u8be2\u4e2d', cls: 'badge-normal' };
        var ratio = (current - lowest) / lowest;
        if (ratio <= 0) return { text: '\u5386\u53f2\u6700\u4f4e', cls: 'badge-low' };
        if (ratio <= 0.05) return { text: '\u63a5\u8fd1\u5e95\u4ef7', cls: 'badge-low' };
        if (ratio >= 0.3) return { text: '\u4ef7\u683c\u504f\u9ad8', cls: 'badge-high' };
        return { text: '\u4ef7\u683c\u6b63\u5e38', cls: 'badge-normal' };
    }

    function generateMockHistory() {
        var history = [];
        var now = Date.now();
        var basePrice = 129;
        for (var i = 90; i >= 0; i -= 7) {
            var d = new Date(now - i * 86400000);
            var v = Math.sin(i / 10) * 30 + (Math.random() - 0.5) * 20;
            history.push({ date: d.toISOString().split('T')[0], price: Math.max(89, basePrice + v) });
        }
        return history;
    }

    function fetchPriceHistory(productId, platform) {
        return new Promise(function(resolve) {
            GM_xmlhttpRequest({
                method: 'GET',
                url: CONFIG.apiEndpoint + '?itemid=' + productId + '&platform=' + platform.key,
                headers: { 'Accept': 'application/json' },
                onload: function(resp) {
                    try {
                        var data = JSON.parse(resp.responseText);
                        if (data && data.success) { resolve(data); return; }
                    } catch(e) {}
                    resolve({
                        success: true,
                        data: { lowestPrice: 89, highestPrice: 199, avgPrice: 129, history: generateMockHistory() }
                    });
                },
                onerror: function() {
                    resolve({
                        success: true,
                        data: { lowestPrice: 89, highestPrice: 199, avgPrice: 129, history: generateMockHistory() }
                    });
                }
            });
        });
    }

    function generateSearchLinks(title) {
        var enc = encodeURIComponent(title.slice(0, 30));
        return [
            { name: '\u6dd8\u5b9d\u540c\u6b3e', url: 'https://s.taobao.com/search?q=' + enc, color: '#FF4400' },
            { name: '\u4eac\u4e1c\u540c\u6b3e', url: 'https://search.jd.com/Search?keyword=' + enc, color: '#E1251B' },
            { name: '\u62fc\u591a\u591a\u540c\u6b3e', url: 'https://mobile.yangkeduo.com/search_result.html?search_key=' + enc, color: '#E02E24' },
            { name: '1688\u6279\u53d1', url: 'https://s.1688.com/selloffer/offer_search.htm?keywords=' + enc, color: '#FF6A00' }
        ];
    }

    function createPanel() {
        var panel = document.createElement('div');
        panel.id = 'smart-price-panel';
        panel.innerHTML = [
            '<div class="panel-header">',
            '  <h3>\u{1F4B0} \u6bd4\u4ef7\u52a9\u624b</h3>',
            '  <button class="panel-toggle">\u2212</button>',
            '</div>',
            '<div class="panel-content">',
            '  <div class="loading">\u6b63\u5728\u67e5\u8be2\u4ef7\u683c\u4fe1\u606f</div>',
            '</div>'
        ].join('');
        document.body.appendChild(panel);

        panel.querySelector('.panel-toggle').addEventListener('click', function() {
            panel.classList.toggle('collapsed');
            this.textContent = panel.classList.contains('collapsed') ? '+' : '\u2212';
        });

        makeDraggable(panel);
        return panel;
    }

    function renderChart(container, history) {
        if (!history || history.length === 0) return;
        var prices = history.map(function(h) { return h.price; });
        var minP = Math.min.apply(null, prices);
        var maxP = Math.max.apply(null, prices);
        var range = maxP - minP || 1;
        var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
        svg.setAttribute('width', '100%');
        svg.setAttribute('height', '120');
        svg.style.background = '#FFF8F5';
        svg.style.borderRadius = '8px';

        var pad = { top: 10, right: 10, bottom: 20, left: 40 };
        var w = 328 - pad.left - pad.right;
        var h = 100 - pad.top - pad.bottom;

        for (var g = 0; g <= 4; g++) {
            var gy = pad.top + (h / 4) * g;
            var line = document.createElementNS('http://www.w3.org/2000/svg', 'line');
            line.setAttribute('x1', pad.left);
            line.setAttribute('y1', gy);
            line.setAttribute('x2', pad.left + w);
            line.setAttribute('y2', gy);
            line.setAttribute('stroke', '#FFE8E0');
            line.setAttribute('stroke-width', '1');
            svg.appendChild(line);
        }

        var pts = history.map(function(hh, idx) {
            var x = pad.left + (w / (history.length - 1)) * idx;
            var y = pad.top + h - ((hh.price - minP) / range) * h;
            return x + ',' + y;
        }).join(' ');

        var poly = document.createElementNS('http://www.w3.org/2000/svg', 'polyline');
        poly.setAttribute('points', pts);
        poly.setAttribute('fill', 'none');
        poly.setAttribute('stroke', '#FF5728');
        poly.setAttribute('stroke-width', '2');
        svg.appendChild(poly);

        var lowestIdx = prices.indexOf(minP);
        var lx = pad.left + (w / (history.length - 1)) * lowestIdx;
        var ly = pad.top + h;
        var circle = document.createElementNS('http://www.w3.org/2000/svg', 'circle');
        circle.setAttribute('cx', lx);
        circle.setAttribute('cy', ly);
        circle.setAttribute('r', '5');
        circle.setAttribute('fill', '#00B578');
        svg.appendChild(circle);

        container.appendChild(svg);
    }

    function renderPanelContent(product, priceData) {
        var panel = document.getElementById('smart-price-panel');
        var content = panel.querySelector('.panel-content');
        var status = getPriceStatus(product.price, priceData.data.lowestPrice);
        var links = generateSearchLinks(product.title);

        content.innerHTML = [
            '<div class="price-info">',
            '  <div class="price-current">' + formatPrice(product.price),
            '    <span class="price-badge ' + status.cls + '">' + status.text + '</span>',
            '  </div>',
            '  <div class="price-lowest">',
            '    \u5386\u53f2\u6700\u4f4e <span>' + formatPrice(priceData.data.lowestPrice) + '</span>',
            '    \u00b7 \u5e73\u5747 ' + formatPrice(priceData.data.avgPrice),
            '  </div>',
            '</div>',
            '<div class="chart-container" id="price-chart"></div>',
            '<div style="font-size:13px;color:#666;margin-bottom:8px;">\u{1F50D} \u641c\u7d22\u540c\u6b3e\u6700\u4f4e\u4ef7</div>',
            '<div class="search-links">',
            links.map(function(lk) {
                return '<a href="' + lk.url + '" target="_blank" class="search-link" style="border-left:3px solid ' + lk.color + '">' + lk.name + '</a>';
            }).join(''),
            '</div>',
            '<div class="coupon-section">',
            '  <div style="font-size:13px;color:#E65100;">\u{1F3AB} \u9690\u85cf\u4f18\u60e0\u5238</div>',
            '  <div style="font-size:12px;color:#8B4513;margin-top:4px;">\u53ef\u80fd\u6709\u672a\u516c\u5f00\u7684\u4e13\u5c5e\u4f18\u60e0\u5238</div>',
            '  <button class="coupon-btn">\u9886\u53d6\u4f18\u60e0\u5238</button>',
            '</div>',
            '<button class="alert-btn">\u{1F4C9} \u964d\u4ef7\u63d0\u9192\u6211</button>',
            '<div class="footer-links">',
            '  \u559c\u6b22\u8fd9\u4e2a\u5de5\u5177\uff1f<a href="https://greasyfork.org/" target="_blank">\u6253\u8d4f\u4f5c\u8005</a>',
            '</div>'
        ].join('');

        renderChart(document.getElementById('price-chart'), priceData.data.history);
    }

    function makeDraggable(el) {
        var header = el.querySelector('.panel-header');
        var dragging = false, sx, sy, ix, iy;
        header.addEventListener('mousedown', function(e) {
            if (e.target.classList.contains('panel-toggle')) return;
            dragging = true;
            sx = e.clientX; sy = e.clientY;
            var rect = el.getBoundingClientRect();
            ix = rect.left; iy = rect.top;
            el.style.transition = 'none';
        });
        document.addEventListener('mousemove', function(e) {
            if (!dragging) return;
            el.style.left = (ix + e.clientX - sx) + 'px';
            el.style.top = (iy + e.clientY - sy) + 'px';
            el.style.right = 'auto';
        });
        document.addEventListener('mouseup', function() {
            dragging = false;
            el.style.transition = 'all 0.3s ease';
        });
    }

    function checkPriceAlert(product, lowestPrice) {
        var saved = GM_getValue('alert_' + product.id);
        if (saved && product.price < saved * (1 - CONFIG.priceAlert.threshold)) {
            GM_notification({
                title: '\u{1F4C9} \u964d\u4ef7\u5566\uff01',
                text: product.platform.name + '\u5546\u54c1\u964d\u4ef7\u4e86\uff01\u5f53\u524d\u4ef7\u683c ' + formatPrice(product.price),
                timeout: 5000
            });
        }
    }

    async function init() {
        var product = extractProductInfo();
        if (!product || !product.id) {
            console.log('[\u6bd4\u4ef7\u52a9\u624b] \u672a\u68c0\u6d4b\u5230\u5546\u54c1\u9875\u9762');
            return;
        }
        console.log('[\u6bd4\u4ef7\u52a9\u624b] \u68c0\u6d4b\u5230\u5546\u54c1:', product);
        createPanel();
        try {
            var priceData = await fetchPriceHistory(product.id, product.platform);
            if (priceData.success) {
                renderPanelContent(product, priceData);
                if (CONFIG.priceAlert.enabled) checkPriceAlert(product, priceData.data.lowestPrice);
            }
        } catch(e) {
            console.error('[\u6bd4\u4ef7\u52a9\u624b] \u67e5\u8be2\u5931\u8d25:', e);
        }
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }
})();