// ==UserScript==
// @name         AI Image Assistant: Pinterest/ArtStation/IG Matrix V5.9
// @namespace    http://tampermonkey.net/
// @version      5.9
// @description  Bilingual UI, Smart AI 2x Sharpen, and Source Finder. Optimized for ArtStation & IG performance.
// @author       Pi Xiao
// @match        https://*.pinterest.com/*
// @match        https://*.artstation.com/*
// @match        https://*.instagram.com/*
// @grant        GM_openInTab
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

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

    // --- 1. 原图解析 ---
    function getOriginalUrl(img) {
        let url = img.src;
        if (!url) return "";
        const host = location.host;

        if (host.includes('pinterest.com')) {
            return url.replace(/\/(236x|474x|564x|736x|1200x)\//, '/originals/').replace(/\.webp$/, '.jpg');
        } 
        if (host.includes('artstation.com')) {
            // A站原图通常就在 /original/ 目录下
            return url.replace(/\/(large|medium|small|2k|4k|micro_square|small_square)\//, '/original/');
        }
        if (host.includes('instagram.com')) {
            if (img.srcset) {
                const sets = img.srcset.split(',').map(s => s.trim().split(' '));
                return sets[sets.length - 1][0];
            }
        }
        return url;
    }

    // --- 2. 核心算法 (保持 V5.6 逻辑) ---
    function smartProcess(canvas, ctx, img) {
        const w = canvas.width, h = canvas.height;
        ctx.imageSmoothingQuality = 'high';
        ctx.drawImage(img, 0, 0, w, h);
        let imageData = ctx.getImageData(0, 0, w, h);
        let data = imageData.data;
        for (let i = 0; i < data.length; i += 4) {
            data[i] += (data[i] - 128) * 0.5;
            data[i+1] += (data[i+1] - 128) * 0.5;
            data[i+2] += (data[i+2] - 128) * 0.5;
        }
        ctx.putImageData(imageData, 0, 0);
        ctx.globalCompositeOperation = 'overlay';
        ctx.globalAlpha = 0.2;
        ctx.drawImage(canvas, 0, 0);
    }

    // --- 3. 增强弹窗逻辑 ---
    async function processAndShow(imgElement) {
        const originalUrl = getOriginalUrl(imgElement);
        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;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;">RECONSTRUCTING...</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:pxspin .8s linear infinite; margin:0 auto; } @keyframes pxspin { 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;
            smartProcess(canvas, ctx, img);
            overlay.innerHTML = "";
            const scrollBox = document.createElement('div');
            scrollBox.style = "overflow:auto; border:1px solid #333; border-radius:12px; flex:1; background:#050505; width:90%;";
            canvas.style.display = "block"; canvas.style.margin = "0 auto";
            scrollBox.appendChild(canvas);
            const btnAi = document.createElement('button');
            btnAi.innerHTML = '🚀 LAUNCH AI 8K ENGINE';
            btnAi.style = "background:linear-gradient(45deg, #6a11cb 0%, #2575fc 100%); color:white; border:none; padding:15px 40px; border-radius:50px; font-size:16px; font-weight:bold; cursor:pointer; margin:20px;";
            btnAi.onclick = () => window.open(`${BRIDGE_PAGE}?url=${encodeURIComponent(originalUrl)}`, '_blank');
            overlay.appendChild(scrollBox);
            overlay.appendChild(btnAi);
        };
        img.onerror = () => { window.open(originalUrl, '_blank'); overlay.remove(); };
    }

    // --- 4. 优化后的注入逻辑 ---
    let isInjecting = false;
    function injectButtons() {
        if (isInjecting) return;
        isInjecting = true;

        const images = document.querySelectorAll('img');
        images.forEach(img => {
            const src = img.src;
            if (!src || img.width < 150 || img.closest('.px-helper-bar')) return;
            
            // 针对 ArtStation 优化容器查找，防止破坏原有布局
            const container = img.closest('.artwork-image-container') || 
                              img.closest('.Project-image-container') ||
                              img.closest('[data-test-id="pin-visual-wrapper"]') ||
                              img.closest('._aagv') || 
                              (location.host.includes('artstation') ? img.parentElement : null);

            if (container) {
                // 仅当容器没有相对定位时才添加，减少 DOM 操作
                const currentStyle = window.getComputedStyle(container);
                if (currentStyle.position === 'static') {
                    container.style.setProperty('position', 'relative', 'important');
                }

                const bar = document.createElement('div');
                bar.className = 'px-helper-bar';
                bar.style = "position:absolute; top:10px; left:10px; z-index:999; display:flex; gap:4px; opacity:0; transition:0.2s; 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:3px 6px; font-weight:bold; font-size:9px; box-shadow:0 2px 4px 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(img); };

                const b2 = document.createElement('button');
                b2.innerHTML = '🖼️ Originals'; b2.style = btnStyle + 'background:#E60023;';
                b2.onclick = (e) => { e.preventDefault(); e.stopPropagation(); window.open(getOriginalUrl(img), '_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(getOriginalUrl(img))}`, '_blank'); };

                bar.appendChild(b1); bar.appendChild(b2); bar.appendChild(b3);
                container.appendChild(bar);
            }
        });
        isInjecting = false;
    }

    // 使用 RequestAnimationFrame 优化，不在加载阶段抢资源
    window.addEventListener('load', () => {
        setInterval(injectButtons, 3000);
        const observer = new MutationObserver(injectButtons);
        observer.observe(document.body, { childList: true, subtree: true });
    });
})();