// ==UserScript==
// @name         Pinterest Ultra Assistant V6.2 (Color Fix)
// @namespace    http://tampermonkey.net/
// @version      6.2
// @description  Bilingual UI, AI 2x Sharpen, Source Finder, and RELIABLE Color Palette Extractor.
// @author       Pi Xiao
// @match        https://*.pinterest.com/*
// @grant        GM_openInTab
// @grant        GM_setClipboard
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    const BRIDGE_PAGE = "https://meishubiji.cn/ai-processing-center/";

    function rgbToHex(r, g, b) {
        return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1).toUpperCase();
    }

    // --- 核心：提取色盘功能 ---
    function getPalette(ctx, w, h) {
        const data = ctx.getImageData(0, 0, w, h).data;
        let colors = {};
        for (let i = 0; i < data.length; i += 200) { // 采样
            let hex = rgbToHex(data[i], data[i+1], data[i+2]);
            colors[hex] = (colors[hex] || 0) + 1;
        }
        return Object.keys(colors).sort((a, b) => colors[b] - colors[a]).slice(0, 6);
    }

    // --- 智能增强弹窗 + 色盘生成 ---
    async function processAndShow(imgUrl) {
        const originalUrl = imgUrl.replace(/\/(236x|474x|564x|736x|1200x)\//, '/originals/').replace(/\.webp$/, '.jpg');
        const overlay = document.createElement('div');
        overlay.style = "position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.95);z-index:2147483647;display:flex;flex-direction:column;align-items:center;justify-content:center;color:white;font-family:sans-serif;cursor:zoom-out;";
        overlay.innerHTML = '<div style="text-align:center;"><div class="px-spinner"></div><div style="margin-top:15px; font-size:14px; color:#00ffcc;">ANALYZING PIXELS & COLORS...</div></div><style>.px-spinner { width:30px; height:30px; border:2px solid rgba(0,255,204,0.1); border-top-color:#00ffcc; border-radius:50%; animation:spin .8s linear infinite; margin:0 auto; } @keyframes spin { to { transform:rotate(360deg); } }</style>';
        overlay.onclick = () => overlay.remove();
        document.body.appendChild(overlay);

        const img = new Image();
        img.crossOrigin = "Anonymous";
        img.src = originalUrl;
        img.onload = function() {
            const canvas = document.createElement('canvas');
            const ctx = canvas.getContext('2d');
            canvas.width = img.width * 2; canvas.height = img.height * 2;
            
            // 简单的对比度增强算法
            ctx.imageSmoothingQuality = 'high';
            ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
            
            // 提取色盘 (由于有了 crossOrigin，这里 100% 成功)
            const palette = getPalette(ctx, canvas.width, canvas.height);

            overlay.innerHTML = "";
            const container = document.createElement('div');
            container.style = "text-align:center; width:95%; height:90vh; display:flex; flex-direction:column; cursor:default;";
            container.onclick = (e) => e.stopPropagation();
            
            const scrollBox = document.createElement('div');
            scrollBox.style = "overflow:auto; border:1px solid #333; border-radius:12px; flex:1; background:#050505;";
            canvas.style.display = "block"; canvas.style.margin = "0 auto";
            scrollBox.appendChild(canvas);

            // --- 底部工具栏：包含色盘和跳转按钮 ---
            const bar = document.createElement('div');
            bar.style = "padding:20px; display:flex; flex-direction:column; align-items:center; gap:15px;";
            
            // 色盘 HTML
            let paletteHTML = `<div style="display:flex; gap:10px; align-items:center;">
                <span style="font-size:12px; color:#888; text-transform:uppercase;">Color Palette:</span>`;
            palette.forEach(color => {
                paletteHTML += `<div class="px-color" style="width:24px; height:24px; background:${color}; border-radius:50%; cursor:pointer; border:2px solid #333;" title="Click to copy: ${color}" data-hex="${color}"></div>`;
            });
            paletteHTML += `</div>`;
            
            const actionHTML = `
                <div style="display:flex; gap:15px; align-items:center;">
                    <button id="btn-ai-go" style="background:linear-gradient(45deg, #6a11cb 0%, #2575fc 100%); color:white; border:none; padding:12px 35px; border-radius:50px; font-size:15px; font-weight:bold; cursor:pointer; box-shadow:0 10px 25px rgba(37,117,252,0.4);">🚀 LAUNCH AI 8K ENGINE</button>
                    <span style="color:#444; cursor:pointer;" onclick="this.closest('#px-overlay').remove()">Close Preview ×</span>
                </div>
            `;

            bar.innerHTML = paletteHTML + actionHTML;
            container.appendChild(scrollBox);
            container.appendChild(bar);
            overlay.id = "px-overlay";
            overlay.appendChild(container);

            // 绑定颜色点击事件
            overlay.querySelectorAll('.px-color').forEach(el => {
                el.onclick = () => {
                    const hex = el.getAttribute('data-hex');
                    GM_setClipboard(hex);
                    const oldBg = el.style.borderColor;
                    el.style.borderColor = "#00ffcc";
                    setTimeout(() => el.style.borderColor = oldBg, 500);
                };
            });

            overlay.querySelector('#btn-ai-go').onclick = () => window.open(`${BRIDGE_PAGE}?url=${encodeURIComponent(originalUrl)}`, '_blank');
        };
        img.onerror = () => { window.open(originalUrl, '_blank'); overlay.remove(); };
    }

    function injectButtons() {
        const images = document.querySelectorAll('img');
        images.forEach(img => {
            const src = img.src;
            if (!src || !src.includes('pinimg.com') || img.width < 150 || img.closest('.px-helper-bar')) return;
            const container = img.closest('[data-test-id="pin-visual-wrapper"]') || img.closest('[data-test-id="visual-content-container"]') || img.parentElement;
            if (container) {
                if (window.getComputedStyle(container).position === 'static') container.style.position = 'relative';
                const bar = document.createElement('div');
                bar.className = 'px-helper-bar';
                bar.style = "position:absolute; top:10px; left:10px; z-index:1000; display:flex; gap:4px; opacity:0; transition:0.3s; pointer-events:auto;";
                container.addEventListener('mouseenter', () => bar.style.opacity = "1");
                container.addEventListener('mouseleave', () => bar.style.opacity = "0");
                const btnStyle = 'color:white; border:none; border-radius:4px; cursor:pointer; padding:4px 8px; font-weight:bold; font-size:9px; box-shadow:0 2px 5px rgba(0,0,0,0.3); white-space:nowrap;';
                const b1 = document.createElement('button'); b1.innerHTML = '🪄 2x HD'; b1.style = btnStyle + 'background:#00BFFF;';
                b1.onclick = (e) => { e.preventDefault(); e.stopPropagation(); processAndShow(src); };
                const b2 = document.createElement('button'); b2.innerHTML = '🖼️ Originals'; b2.style = btnStyle + 'background:#E60023;';
                b2.onclick = (e) => { e.preventDefault(); e.stopPropagation(); window.open(src.replace(/\/(236x|474x|564x|736x)\//, '/originals/'), '_blank'); };
                const b3 = document.createElement('button'); b3.innerHTML = '🔍 Source'; b3.style = btnStyle + 'background:#34a853;';
                b3.onclick = (e) => { e.preventDefault(); e.stopPropagation(); window.open(`https://lens.google.com/uploadbyurl?url=${encodeURIComponent(src.replace(/\/(236x|474x|564x|736x)\//, '/originals/'))}`, '_blank'); };
                bar.appendChild(b1); bar.appendChild(b2); bar.appendChild(b3);
                container.appendChild(bar);
            }
        });
    }

    setInterval(injectButtons, 2500);
    const observer = new MutationObserver(injectButtons);
    observer.observe(document.body, { childList: true, subtree: true });
})();