// ==UserScript==
// @name         AI Image Description Generator Gimini
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  使用AI生成网页图片描述
// @author       AlphaCat
// @match        *://*/*
// @grant        GM_addStyle
// @grant        GM_setValue
// @grant        GM_getValue
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // 全局变量
    let isSelectionMode = false;
    
    // 定义默认提示词
    const DEFAULT_PROMPT = "Describe the image from the perspective of someone with only a kindergarten education. If it is a realistic photo, analyze the elements of aperture, focal length, and shutter separately from the perspective of a professional photographer and describe the subject matter of the photo.";

    // 添加样式
    GM_addStyle(`
        .ai-config-modal {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            z-index: 10000;
            min-width: 500px;
            height: auto;
        }
        .ai-config-modal h3 {
            margin: 0 0 15px 0;
            font-size: 14px;
            font-weight: bold;
            color: #333;
        }
        .ai-config-modal label {
            display: inline-block;
            font-size: 12px;
            font-weight: bold;
            color: #333;
            margin: 0;
            line-height: normal;
            height: auto;
        }
        .ai-config-modal .input-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }
        .ai-config-modal input {
            display: block;
            width: 100%;
            padding: 2px 24px 2px 2px;
            margin: 2px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 13px;
            line-height: normal;
            height: auto;
            box-sizing: border-box;
        }
        .ai-config-modal .input-icon {
            position: absolute;
            right: 4px;
            width: 16px;
            height: 16px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #666;
            font-size: 12px;
            user-select: none;
        }
        .ai-config-modal .clear-icon {
            right: 24px;
        }
        .ai-config-modal .toggle-password {
            right: 4px;
        }
        .ai-config-modal .input-icon:hover {
            color: #333;
        }
        .ai-config-modal .input-group {
            margin-bottom: 12px;
            height: auto;
            display: flex;
            flex-direction: column;
        }
        .ai-config-modal .button-row {
            display: flex;
            gap: 10px;
            align-items: center;
            margin-top: 5px;
        }
        .ai-config-modal .check-button {
            padding: 4px 8px;
            border: none;
            border-radius: 4px;
            background: #007bff;
            color: white;
            cursor: pointer;
            font-size: 12px;
        }
        .ai-config-modal .check-button:hover {
            background: #0056b3;
        }
        .ai-config-modal .check-button:disabled {
            background: #cccccc;
            cursor: not-allowed;
        }
        .ai-config-modal select {
            width: 100%;
            padding: 4px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 13px;
            margin-top: 2px;
        }
        .ai-config-modal .status-text {
            font-size: 12px;
            margin-left: 10px;
        }
        .ai-config-modal .status-success {
            color: #28a745;
        }
        .ai-config-modal .status-error {
            color: #dc3545;
        }
        .ai-config-modal button {
            margin: 10px 5px;
            padding: 8px 15px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
        }
        .ai-config-modal button#ai-save-config {
            background: #4CAF50;
            color: white;
        }
        .ai-config-modal button#ai-cancel-config {
            background: #dc3545;
            color: white;
        }
        .ai-config-modal button:hover {
            opacity: 0.9;
        }
        .ai-floating-btn {
            position: fixed;
            width: 32px;
            height: 32px;
            background: #4CAF50;
            color: white;
            border-radius: 50%;
            cursor: move;
            z-index: 9999;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            user-select: none;
            transition: background-color 0.3s;
        }
        .ai-floating-btn:hover {
            background: #45a049;
        }
        .ai-floating-btn svg {
            width: 20px;
            height: 20px;
            fill: white;
        }
        .ai-menu {
            position: absolute;
            background: white;
            border-radius: 5px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 8px;
            z-index: 10000;
            display: flex;
            gap: 8px;
        }
        .ai-menu-item {
            width: 32px;
            height: 32px;
            padding: 6px;
            cursor: pointer;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background-color 0.3s;
        }
        .ai-menu-item:hover {
            background: #f5f5f5;
        }
        .ai-menu-item svg {
            width: 20px;
            height: 20px;
            fill: #666;
        }
        .ai-menu-item:hover svg {
            fill: #4CAF50;
        }
        .ai-image-options {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin: 15px 0;
        }
        .ai-image-options button {
            padding: 8px 15px;
            border: none;
            border-radius: 4px;
            background: #4CAF50;
            color: white;
            cursor: pointer;
            transition: background-color 0.3s;
            font-size: 14px;
        }
        .ai-image-options button:hover {
            background: #45a049;
        }
        #ai-cancel {
            background: #dc3545;
            color: white;
        }
        #ai-cancel:hover {
            opacity: 0.9;
        }
        .ai-toast {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            padding: 10px 20px;
            background: rgba(0, 0, 0, 0.8);
            color: white;
            border-radius: 4px;
            font-size: 14px;
            z-index: 10000;
            animation: fadeInOut 3s ease;
            pointer-events: none;
            white-space: pre-line;
            text-align: center;
            max-width: 80%;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }
        @keyframes fadeInOut {
            0% { opacity: 0; transform: translate(-50%, 10px); }
            10% { opacity: 1; transform: translate(-50%, 0); }
            90% { opacity: 1; transform: translate(-50%, 0); }
            100% { opacity: 0; transform: translate(-50%, -10px); }
        }
        .ai-config-modal .button-group {
            display: flex;
            justify-content: flex-end;
            gap: 10px;
            margin-top: 20px;
        }
        .ai-config-modal .button-group button {
            padding: 6px 16px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            transition: background-color 0.2s;
        }
        .ai-config-modal .save-button {
            background: #007bff;
            color: white;
        }
        .ai-config-modal .save-button:hover {
            background: #0056b3;
        }
        .ai-config-modal .save-button:disabled {
            background: #cccccc;
            cursor: not-allowed;
        }
        .ai-config-modal .cancel-button {
            background: #f8f9fa;
            color: #333;
        }
        .ai-config-modal .cancel-button:hover {
            background: #e2e6ea;
        }
        .ai-selecting-image {
            cursor: crosshair !important;
        }
        .ai-selecting-image * {
            cursor: crosshair !important;
        }
        .ai-image-description {
            position: fixed;
            background: rgba(0, 0, 0, 0.8);
            color: white;
            padding: 8px 12px;
            border-radius: 4px;
            font-size: 14px;
            line-height: 1.4;
            max-width: 300px;
            text-align: center;
            word-wrap: break-word;
            z-index: 10000;
            pointer-events: none;
            animation: fadeIn 0.3s ease;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        .ai-modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
        }
        .ai-result-modal {
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: relative;
            min-width: 300px;
            max-width: 1000px;
            max-height: 540px;
            overflow-y: auto;
            width: 90%;
        }
        .ai-result-modal h3 {
            margin: 0 0 10px 0;
            font-size: 14px;
            color: #333;
        }
        .ai-result-modal .description-code {
            background: #1e1e1e;
            color: #ffffff;
            padding: 12px;
            border-radius: 4px;
            margin: 5px 0;
            cursor: pointer;
            white-space: pre-wrap;
            word-wrap: break-word;
            font-family: monospace;
            border: 1px solid #333;
            position: relative;
            max-height: 500px;
            overflow-y: auto;
            font-size: 12px;
            line-height: 1.4;
        }
        .ai-result-modal .description-code * {
            color: #ffffff !important;
        }
        .ai-result-modal .description-code code {
            color: #ffffff;
            display: block;
            width: 100%;
        }
        .ai-result-modal .description-code:hover {
            background: #2d2d2d;
            color: #ffffff;
        }
        .ai-result-modal .copy-hint {
            font-size: 11px;
            color: #666;
            text-align: center;
            margin: 2px 0;
        }
        .ai-result-modal .close-button {
            position: absolute;
            top: 8px;
            right: 8px;
            background: none;
            border: none;
            font-size: 18px;
            cursor: pointer;
            color: #666;
            padding: 2px 6px;
            line-height: 1;
        }
        .ai-result-modal .close-button:hover {
            color: #333;
        }
        .ai-selection-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 9998;
            cursor: crosshair;
            pointer-events: none;
        }
        
        .ai-selecting-image img {
            position: relative;
            z-index: 9999;
            cursor: pointer !important;
            transition: outline 0.2s ease;
        }
        
        .ai-selecting-image img:hover {
            outline: 2px solid white;
            outline-offset: 2px;
        }
        
        /* 移动端样式优化 */
        @media (max-width: 768px) {
            .ai-floating-btn {
                width: 40px;
                height: 40px;
                touch-action: none;
            }
            
            .ai-floating-btn svg {
                width: 24px;
                height: 24px;
            }
            
            .ai-config-modal {
                width: 90%;
                min-width: auto;
                max-width: 400px;
                padding: 15px;
                margin: 10px;
                box-sizing: border-box;
            }
            
            .ai-config-modal .button-group {
                margin-top: 15px;
                flex-direction: row;
                justify-content: space-between;
                gap: 10px;
            }

            .ai-config-modal .button-group button {
                flex: 1;
                min-height: 44px;
                font-size: 16px;
                padding: 10px;
                margin: 0;
            }
            
            .ai-result-modal {
                width: 95%;
                min-width: auto;
                max-width: 90%;
                margin: 10px;
                padding: 15px;
            }

            .ai-modal-overlay {
                padding: 10px;
                box-sizing: border-box;
            }

            .ai-config-modal button,
            .ai-config-modal .input-icon,
            .ai-config-modal select,
            .ai-config-modal input {
                min-height: 44px;
                padding: 10px;
                font-size: 16px;
            }

            .ai-config-modal textarea {
                min-height: 100px;
                font-size: 16px;
                padding: 10px;
            }

            .ai-config-modal .input-icon {
                width: 44px;
                height: 44px;
                font-size: 20px;
            }

            .ai-config-modal {
                max-height: 90vh;
                overflow-y: auto;
                -webkit-overflow-scrolling: touch;
            }
        }
    `);

    // 显示toast提示
    function showToast(message, duration = 3000) {
        const toast = document.createElement('div');
        toast.className = 'ai-toast';
        toast.textContent = message;
        document.body.appendChild(toast);
        
        setTimeout(() => {
            toast.remove();
        }, duration);
    }

    // 进入图片选择模式
    function enterImageSelectionMode() {
        if(isSelectionMode) return;
        
        isSelectionMode = true;

        const floatingBtn = document.querySelector('.ai-floating-btn');
        if(floatingBtn) {
            floatingBtn.style.display = 'none';
        }

        const overlay = document.createElement('div');
        overlay.className = 'ai-selection-overlay';
        document.body.appendChild(overlay);
        
        document.body.classList.add('ai-selecting-image');

        const clickHandler = async function(e) {
            if (!isSelectionMode) return;

            if (e.target.tagName === 'IMG') {
                e.preventDefault();
                e.stopPropagation();
                showToast('图片选择功能待实现');
                exitImageSelectionMode();
            }
        };

        document.addEventListener('click', clickHandler, true);
        
        const escHandler = (e) => {
            if (e.key === 'Escape') {
                exitImageSelectionMode();
            }
        };
        document.addEventListener('keydown', escHandler);

        window._imageSelectionHandlers = {
            click: clickHandler,
            keydown: escHandler
        };
    }

    // 退出图片选择模式
    function exitImageSelectionMode() {
        isSelectionMode = false;

        const floatingBtn = document.querySelector('.ai-floating-btn');
        if(floatingBtn) {
            floatingBtn.style.display = 'flex';
        }

        const overlay = document.querySelector('.ai-selection-overlay');
        if (overlay) {
            overlay.remove();
        }

        document.body.classList.remove('ai-selecting-image');

        if (window._imageSelectionHandlers) {
            document.removeEventListener('click', window._imageSelectionHandlers.click, true);
            document.removeEventListener('keydown', window._imageSelectionHandlers.keydown);
            window._imageSelectionHandlers = null;
        }
    }

    // 创建配置界面
    function createConfigUI() {
        const existingModal = document.querySelector('.ai-modal-overlay');
        if (existingModal) {
            existingModal.remove();
        }

        const overlay = document.createElement('div');
        overlay.className = 'ai-modal-overlay';
        
        const modal = document.createElement('div');
        modal.className = 'ai-config-modal';
        modal.innerHTML = `
            <h3>AI图像描述配置</h3>
            <div class="input-group">
                <label>API Endpoint:</label>
                <div class="input-wrapper">
                    <input type="text" id="ai-endpoint" placeholder="https://api.openai.com" value="${GM_getValue('apiEndpoint', '')}">
                    <span class="input-icon clear-icon" title="清空">✕</span>
                </div>
            </div>
            <div class="input-group">
                <label>API Key (每行一个):</label>
                <div class="input-wrapper">
                    <textarea id="ai-apikey" rows="5" style="width: 100%; resize: vertical;">${GM_getValue('apiKey', '')}</textarea>
                    <span class="input-icon clear-icon" title="清空">✕</span>
                </div>
                <div class="button-row">
                    <button class="check-button" id="check-api">检测可用性</button>
                </div>
            </div>
            <div class="input-group">
                <label>可用模型:</label>
                <select id="ai-model">
                    <option value="">请先检测API可用性</option>
                </select>
            </div>
            <div class="input-group">
                <label>提示词:</label>
                <div class="input-wrapper">
                    <textarea id="ai-prompt" rows="4" style="width: 100%; resize: vertical;">${GM_getValue('customPrompt', DEFAULT_PROMPT)}</textarea>
                    <span class="input-icon clear-icon" title="重置为默认值">↺</span>
                </div>
            </div>
            <div class="button-group">
                <button type="button" class="cancel-button" id="ai-cancel-config">取消</button>
                <button type="button" class="save-button" id="ai-save-config">保存</button>
            </div>
        `;

        overlay.appendChild(modal);
        document.body.appendChild(overlay);

        // 添加清空按钮事件
        const clearButtons = modal.querySelectorAll('.clear-icon');
        clearButtons.forEach(button => {
            button.addEventListener('click', function(e) {
                const input = this.parentElement.querySelector('input, textarea');
                if (input) {
                    if (input.id === 'ai-prompt') {
                        input.value = DEFAULT_PROMPT;
                    } else {
                        input.value = '';
                    }
                    input.focus();
                }
            });
        });

        // 检测API可用性按钮点击事件
        const checkButton = modal.querySelector('#check-api');
        if (checkButton) {
            checkButton.addEventListener('click', function() {
                showToast('API检测功能待实现');
            });
        }

        // 保存配置
        const saveButton = modal.querySelector('#ai-save-config');
        if (saveButton) {
            saveButton.addEventListener('click', function(e) {
                e.preventDefault();
                e.stopPropagation();
                
                const endpoint = modal.querySelector('#ai-endpoint')?.value?.trim() || '';
                const apiKeys = modal.querySelector('#ai-apikey')?.value?.trim() || '';
                const selectedModel = modal.querySelector('#ai-model')?.value || '';
                const customPrompt = modal.querySelector('#ai-prompt')?.value?.trim() || DEFAULT_PROMPT;

                if (!endpoint || !apiKeys) {
                    showToast('请填写API Endpoint和至少一个API Key');
                    return;
                }

                GM_setValue('apiEndpoint', endpoint);
                GM_setValue('apiKey', apiKeys);
                GM_setValue('selectedModel', selectedModel);
                GM_setValue('customPrompt', customPrompt);
                showToast('配置已保存');
                
                overlay.remove();
            });
        }

        // 取消配置
        const cancelButton = modal.querySelector('#ai-cancel-config');
        if (cancelButton) {
            cancelButton.addEventListener('click', function(e) {
                e.preventDefault();
                e.stopPropagation();
                overlay.remove();
            });
        }

        // 点击遮罩层关闭
        overlay.addEventListener('click', function(e) {
            if (e.target === overlay) {
                overlay.remove();
            }
        });

        // 阻止模态框内的点击事件冒泡
        modal.addEventListener('click', function(e) {
            e.stopPropagation();
        });
    }

    // 创建悬浮按钮
    function createFloatingButton() {
        const btn = document.createElement('div');
        btn.className = 'ai-floating-btn';
        btn.innerHTML = `
            <svg viewBox="0 0 24 24">
                <path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8zm0-14c-3.31 0-6 2.69-6 6s2.69 6 6 6 6-2.69 6-6-2.69-6-6-6zm0 10c-2.21 0-4-1.79-4-4h2c0-1.1.9-2 2-2s2 .9 2 2c0 2-3 1.75-3 5h2c0-2.25 3-2.5 3-5 0-2.21-1.79-4-4-4z"/>
            </svg>
        `;

        const savedPos = JSON.parse(GM_getValue('btnPosition', '{"x": 20, "y": 20}'));
        btn.style.left = (savedPos.x || 20) + 'px';
        btn.style.top = (savedPos.y || 20) + 'px';
        btn.style.right = 'auto';
        btn.style.bottom = 'auto';

        let isDragging = false;
        let hasMoved = false;
        let startX, startY;
        let initialLeft, initialTop;
        let longPressTimer;
        let touchStartTime;

        // 触屏事件处理
        btn.addEventListener('touchstart', function(e) {
            e.preventDefault();
            touchStartTime = Date.now();
            
            longPressTimer = setTimeout(() => {
                exitImageSelectionMode();
                createConfigUI();
            }, 500);

            const touch = e.touches[0];
            startX = touch.clientX;
            startY = touch.clientY;
            const rect = btn.getBoundingClientRect();
            initialLeft = rect.left;
            initialTop = rect.top;
        });

        btn.addEventListener('touchmove', function(e) {
            e.preventDefault();
            clearTimeout(longPressTimer);

            const touch = e.touches[0];
            const deltaX = touch.clientX - startX;
            const deltaY = touch.clientY - startY;
            
            if (Math.abs(deltaX) > 5 || Math.abs(deltaY) > 5) {
                hasMoved = true;
            }
            
            const newLeft = Math.max(0, Math.min(window.innerWidth - btn.offsetWidth, initialLeft + deltaX));
            const newTop = Math.max(0, Math.min(window.innerHeight - btn.offsetHeight, initialTop + deltaY));
            
            btn.style.left = newLeft + 'px';
            btn.style.top = newTop + 'px';
        });

        btn.addEventListener('touchend', function(e) {
            e.preventDefault();
            clearTimeout(longPressTimer);
            
            const touchDuration = Date.now() - touchStartTime;
            
            if (!hasMoved && touchDuration < 500) {
                enterImageSelectionMode();
            }
            
            if (hasMoved) {
                const rect = btn.getBoundingClientRect();
                GM_setValue('btnPosition', JSON.stringify({
                    x: rect.left,
                    y: rect.top
                }));
            }
            
            hasMoved = false;
        });

        // 鼠标事件处理
        btn.addEventListener('click', function(e) {
            if (e.button === 0 && !hasMoved) {
                enterImageSelectionMode();
                e.stopPropagation();
            }
            hasMoved = false;
        });

        btn.addEventListener('contextmenu', function(e) {
            e.preventDefault();
            exitImageSelectionMode();
            createConfigUI();
        });

        // 拖拽相关事件
        function dragStart(e) {
            if (e.target === btn || btn.contains(e.target)) {
                isDragging = true;
                hasMoved = false;
                const rect = btn.getBoundingClientRect();
                startX = e.clientX;
                startY = e.clientY;
                initialLeft = rect.left;
                initialTop = rect.top;
                e.preventDefault();
            }
        }

        function drag(e) {
            if (isDragging) {
                e.preventDefault();
                const deltaX = e.clientX - startX;
                const deltaY = e.clientY - startY;
                
                if (Math.abs(deltaX) > 5 || Math.abs(deltaY) > 5) {
                    hasMoved = true;
                }
                
                const newLeft = Math.max(0, Math.min(window.innerWidth - btn.offsetWidth, initialLeft + deltaX));
                const newTop = Math.max(0, Math.min(window.innerHeight - btn.offsetHeight, initialTop + deltaY));
                
                btn.style.left = newLeft + 'px';
                btn.style.top = newTop + 'px';
            }
        }

        function dragEnd(e) {
            if (isDragging) {
                isDragging = false;
                const rect = btn.getBoundingClientRect();
                GM_setValue('btnPosition', JSON.stringify({
                    x: rect.left,
                    y: rect.top
                }));
            }
        }

        btn.addEventListener('mousedown', dragStart);
        document.addEventListener('mousemove', drag);
        document.addEventListener('mouseup', dragEnd);

        document.body.appendChild(btn);
        return btn;
    }

    // 初始化
    function initialize() {
        if (document.readyState === 'loading') {
            document.addEventListener('DOMContentLoaded', () => {
                createFloatingButton();
            });
        } else {
            createFloatingButton();
        }
    }

    // 启动脚本
    initialize();
})();