/**
 * 导出动画弹出框
 */
class ExportView {
    constructor() {
        this.overlay = null;
        this.modal = null;
        this.previewImage = null;
        this.previewPlaceholder = null;
        this.cancelBtn = null;
        this.confirmBtn = null;
        this.floatingAIBtn = null;
        this.imageData = null;
        this.spritesheetCanvas = null;
        this.folderName = null;
        this.spritesheetLayout = null;
        this.replacedImageData = null;
        this.geminiOriginalImageData = null;
        this.originalSpritesheetData = null;
        this.skipPreviewUI = false;
        
        // 下载确认对话框相关
        this.downloadConfirmOverlay = null;
        this.downloadConfirmClose = null;
        this.downloadOptions = null;
        
        this.init();
    }

    init() {
        this.overlay = document.getElementById('exportOverlay');
        this.modal = document.getElementById('exportModal');
        this.previewImage = document.getElementById('previewImage');
        this.previewPlaceholder = document.getElementById('previewPlaceholder');
        this.cancelBtn = document.getElementById('exportCancelBtn');
        this.confirmBtn = document.getElementById('exportConfirmBtn');
        this.floatingAIBtn = document.getElementById('floatingAIBtn');
        
        // 下载确认对话框元素
        this.downloadConfirmOverlay = document.getElementById('downloadConfirmOverlay');
        this.downloadConfirmClose = document.getElementById('downloadConfirmClose');
        this.downloadOptions = document.querySelectorAll('.download-option');
        
        // 确保对话框初始状态是隐藏的
        if (this.downloadConfirmOverlay) {
            this.downloadConfirmOverlay.style.display = 'none';
        }
        
        // 加载VIP抠图价格
        this.loadVIPMattingPrice();
        
        this.bindEvents();
        
        // 初始时禁用确定按钮
        if (this.confirmBtn) {
            this.confirmBtn.disabled = true;
        }
        
        this.reset();
    }

    bindEvents() {
        // 取消按钮（右上角）
        this.cancelBtn?.addEventListener('click', () => {
            this.close();
        });

        // 取消按钮（底部操作栏）
        this.cancelBtnBottom?.addEventListener('click', () => {
            this.close();
        });

        // 确定按钮（下载）
        this.confirmBtn?.addEventListener('click', () => {
            this.handleConfirm();
        });

        // 悬浮AI按钮 - 打开AI生图界面
        this.floatingAIBtn?.addEventListener('click', () => {
            this.openAIGenerateView();
        });

        // 点击遮罩层关闭
        this.overlay?.addEventListener('click', (e) => {
            if (e.target === this.overlay) {
                this.close();
            }
        });

        // ESC键关闭 - 直接关闭整个界面
        document.addEventListener('keydown', (e) => {
            if (e.key === 'Escape') {
                    this.hideDownloadConfirm();
                    this.close();
            }
        });
        
        // 下载确认对话框事件 - 关闭时同时关闭整个界面
        this.downloadConfirmClose?.addEventListener('click', () => {
            this.hideDownloadConfirm();
            this.close();
        });
        
        // 点击遮罩层关闭下载确认对话框 - 同时关闭整个界面
        this.downloadConfirmOverlay?.addEventListener('click', (e) => {
            if (e.target === this.downloadConfirmOverlay) {
                this.hideDownloadConfirm();
                this.close();
            }
        });
        
        // 下载选项点击事件
        this.downloadOptions?.forEach(option => {
            option.addEventListener('click', () => {
                const downloadType = option.dataset.option;
                this.handleDownloadOption(downloadType);
            });
        });

        // 监听来自父窗口的消息
        window.addEventListener('message', (event) => {
            if (event.data && event.data.type === 'show-export-preview') {
                const skipPreview = !!event.data.skipPreviewUI;
                const directDownloadType = event.data.directDownloadType; // 直接下载类型
                this.reset();
                this.skipPreviewUI = skipPreview;
                this.directDownloadType = directDownloadType; // 存储直接下载类型
                this.prepareDirectPreview(event.data.imageUrl || event.data.imageData, event.data.fileName);
            } else if (event.data && event.data.type === 'generate-export-preview') {
                // console.log('[ExportView] 收到生成预览消息:', event.data);
                this.reset();
                this.skipPreviewUI = !!event.data.skipPreviewUI;
                this.folderName = event.data.folderName;
                this.generatePreview(event.data.folderName);
            }
        });
    }

    /**
     * 显示遮罩及弹窗元素
     */
    showOverlayUI() {
        if (this.overlay) {
            this.overlay.style.display = 'flex';
        }
        if (this.modal) {
            this.modal.style.display = 'block';
        }
        if (this.cancelBtn) {
            this.cancelBtn.style.display = 'block';
        }
        if (this.floatingAIBtn) {
            this.floatingAIBtn.style.display = 'block';
        }
        if (this.confirmBtn) {
            this.confirmBtn.style.display = 'block';
        }
    }

    /**
     * 加载图片
     * @param {string} src - 图片地址或base64
     * @returns {Promise<HTMLImageElement>}
     */
    loadImage(src) {
        return new Promise((resolve, reject) => {
            const img = new Image();
            img.crossOrigin = 'anonymous';
            img.onload = () => resolve(img);
            img.onerror = () => reject(new Error('无法加载图片'));
            img.src = src;
        });
    }

    /**
     * 生成预览图
     * @param {string} folderName - 文件夹名称
     */
    async generatePreview(folderName) {
        if (!folderName) {
            // console.warn('[ExportView] 没有提供文件夹名称');
            if (this.previewPlaceholder) {
                this.previewPlaceholder.textContent = '没有提供文件夹名称';
            }
            return;
        }

        // 重置状态（确保每次打开都是全新状态）
        this.reset();

        // 显示遮罩并重置预览区域
        if (!this.skipPreviewUI) {
            this.showOverlayUI();
            if (this.previewPlaceholder) {
                this.previewPlaceholder.style.display = 'flex';
                this.previewPlaceholder.classList.remove('hide');
            }
            if (this.previewImage) {
                this.previewImage.style.display = 'none';
                this.previewImage.classList.remove('show');
            }
        } else {
            if (this.overlay) {
                this.overlay.style.display = 'none';
            }
            if (this.modal) {
                this.modal.style.display = 'none';
            }
        }

        // 保存文件夹名称
        this.folderName = folderName;

        // 显示加载状态
        if (!this.skipPreviewUI) {
            if (this.previewPlaceholder) {
                this.previewPlaceholder.classList.remove('hide');
            }
            if (this.previewImage) {
                this.previewImage.classList.remove('show');
            }
        }

        try {
            // 获取当前登录用户名
            const username = this.getCurrentUsername();
            if (!username) {
                throw new Error('请先登录');
            }
            
            // 获取帧列表
            const encodedFolderName = encodeURIComponent(folderName);
            let apiUrl = `http://localhost:3000/api/frames/${encodedFolderName}`;
            if (username) {
                apiUrl += `?username=${encodeURIComponent(username)}`;
            }
            const response = await fetch(apiUrl);
            
            if (!response.ok) {
                // 服务端返回错误，解析错误信息并显示
                const errorMessage = await this.handleServerError(response, '无法获取帧列表');
                throw new Error(errorMessage);
            }
            
            const data = await response.json();
            const frameNumbers = data.frames || [];
            const fileNames = data.fileNames || [];
            
            if (frameNumbers.length === 0) {
                throw new Error('该文件夹中没有图片');
            }
            
            // 加载所有图片（使用正确的API路径）
            const images = [];
            for (let i = 0; i < frameNumbers.length; i++) {
                const frameNum = frameNumbers[i];
                
                // 使用API路径，从用户目录加载
                let imgSrc;
                if (fileNames[i]) {
                    // 使用实际文件名
                    const imagePath = `${folderName}/${fileNames[i]}`;
                    imgSrc = `/api/disk/preview?username=${encodeURIComponent(username)}&path=${encodeURIComponent(imagePath)}`;
                } else {
                    // 回退到使用帧号构造文件名
                    const frameName = frameNum.toString().padStart(2, '0');
                    const imagePath = `${folderName}/${frameName}.png`;
                    imgSrc = `/api/disk/preview?username=${encodeURIComponent(username)}&path=${encodeURIComponent(imagePath)}`;
                }
                
                const img = await new Promise((resolve, reject) => {
                    const image = new Image();
                    image.crossOrigin = 'anonymous';
                    image.onload = () => resolve(image);
                    image.onerror = () => reject(new Error(`Failed to load image: ${imgSrc}`));
                    image.src = imgSrc;
                });
                
                images.push({
                    img: img,
                    width: img.width,
                    height: img.height,
                    frameNum: frameNum
                });
            }
            
            // 计算布局（简化版，使用简单的网格布局）
            const frameWidth = images[0].width;
            const frameHeight = images[0].height;
            const cols = Math.ceil(Math.sqrt(images.length));
            const rows = Math.ceil(images.length / cols);
            
            // 创建 Canvas 并绘制
            const canvas = document.createElement('canvas');
            canvas.width = frameWidth * cols;
            canvas.height = frameHeight * rows;
            const ctx = canvas.getContext('2d');
            
            // 保存 canvas 和布局信息用于下载
            this.spritesheetCanvas = canvas;
            
            // 填充透明背景
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            
            // 保存布局信息（用于生成 JSON）
            const layout = [];
            
            // 绘制所有图片
            images.forEach((item, index) => {
                const col = index % cols;
                const row = Math.floor(index / cols);
                const x = col * frameWidth;
                const y = row * frameHeight;
                ctx.drawImage(item.img, x, y);
                
                // 保存布局信息
                layout.push({
                    x: x,
                    y: y,
                    width: item.width,
                    height: item.height,
                    frameNum: item.frameNum
                });
            });
            
            // 保存布局信息
            this.spritesheetLayout = {
                layout: layout,
                sheetWidth: canvas.width,
                sheetHeight: canvas.height
            };
            
            // 转换为 base64
            const imageUrl = await new Promise((resolve) => {
                canvas.toBlob((blob) => {
                    const url = URL.createObjectURL(blob);
                    resolve(url);
                }, 'image/png');
            });
            
            // 保存原始 spritesheet 的 base64 数据
            this.originalSpritesheetData = await new Promise((resolve) => {
                canvas.toBlob((blob) => {
                    const reader = new FileReader();
                    reader.onload = () => resolve(reader.result);
                    reader.readAsDataURL(blob);
                }, 'image/png');
            });
            
            // 显示预览图
            this.showPreview(imageUrl);
            
            // 如果已经有参考图，显示替换按钮
            if (this.referenceImageData && this.replaceBtn) {
                this.replaceBtn.style.display = 'block';
            }
            
            // 预览图生成完成后，自动显示下载选项对话框
            setTimeout(() => {
                this.showDownloadConfirm();
                // 通知父窗口内容已准备好
                if (window.parent && window.parent !== window) {
                    window.parent.postMessage({ type: 'export-view-ready' }, '*');
                }
            }, 300);
        } catch (error) {
            // console.error('[ExportView] 生成预览图失败:', error);
            if (this.previewPlaceholder) {
                // 隐藏加载动画，显示错误信息
                const spinner = this.previewPlaceholder.querySelector('.loading-spinner');
                const loadingText = this.previewPlaceholder.querySelector('.loading-text');
                if (spinner) spinner.style.display = 'none';
                if (loadingText) {
                    loadingText.textContent = '生成预览图失败: ' + error.message;
                    loadingText.style.color = '#ef4444';
                }
                this.previewPlaceholder.classList.remove('hide');
            }
        }
    }

    /**
     * 处理直接传入的图片预览（AI 历史等）
     * @param {string} imageUrl - 图片URL或base64
     * @param {string} fileName - 基础文件名
     */
    async prepareDirectPreview(imageUrl, fileName) {
        if (!imageUrl) {
            this.showAlert('没有可预览的图片');
            return;
        }

        try {
            if (!this.skipPreviewUI) {
                this.showOverlayUI();
                if (this.previewPlaceholder) {
                    this.previewPlaceholder.style.display = 'flex';
                    this.previewPlaceholder.classList.remove('hide');
                }
            }

            const img = await this.loadImage(imageUrl);
            const canvas = document.createElement('canvas');
            canvas.width = img.width;
            canvas.height = img.height;
            const ctx = canvas.getContext('2d');
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            ctx.drawImage(img, 0, 0);

            this.spritesheetCanvas = canvas;
            this.spritesheetLayout = {
                layout: [{
                    x: 0,
                    y: 0,
                    width: img.width,
                    height: img.height,
                    frameNum: 1
                }],
                sheetWidth: img.width,
                sheetHeight: img.height
            };

            const safeName = (fileName || 'ai-image').toString().replace(/[^a-zA-Z0-9_-]/g, '_') || 'ai-image';
            this.folderName = safeName;

            this.originalSpritesheetData = canvas.toDataURL('image/png');
            this.imageData = imageUrl;

            if (!this.skipPreviewUI) {
                if (this.previewImage) {
                    this.previewImage.src = imageUrl;
                    this.previewImage.style.display = 'block';
                    this.previewImage.classList.add('show');
                }
                if (this.previewPlaceholder) {
                    this.previewPlaceholder.style.display = 'none';
                    this.previewPlaceholder.classList.add('hide');
                }
            }
            if (this.confirmBtn) {
                this.confirmBtn.disabled = false;
            }

            // 如果有直接下载类型，直接开始下载
            if (this.directDownloadType) {
                // 通知父窗口内容已准备好
                if (window.parent && window.parent !== window) {
                    window.parent.postMessage({ type: 'export-view-ready' }, '*');
                }
                const delay = 50;
                setTimeout(() => this.handleDownloadOption(this.directDownloadType), delay);
            } else {
                const delay = this.skipPreviewUI ? 50 : 200;
                setTimeout(() => {
                    this.showDownloadConfirm();
                    // 通知父窗口内容已准备好
                    if (window.parent && window.parent !== window) {
                        window.parent.postMessage({ type: 'export-view-ready' }, '*');
                    }
                }, delay);
            }
        } catch (error) {
            console.error('[ExportView] 处理直接预览失败:', error);
            this.showAlert(`加载预览失败: ${error.message}`);
            this.close();
        }
    }

    /**
     * 计算宽高比
     * @param {number} width - 宽度
     * @param {number} height - 高度
     * @returns {string} 宽高比字符串（例如：16:9）
     */
    calculateAspectRatio(width, height) {
        // 计算最大公约数
        const gcd = (a, b) => b === 0 ? a : gcd(b, a % b);
        const divisor = gcd(width, height);
        const ratioWidth = width / divisor;
        const ratioHeight = height / divisor;
        
        // 如果比例太大，使用简化版本
        if (ratioWidth > 100 || ratioHeight > 100) {
            // 使用小数形式
            const ratio = width / height;
            return ratio.toFixed(2) + ':1';
        }
        
        return `${ratioWidth}:${ratioHeight}`;
    }


    /**
     * 显示预览图（Spritesheet）- 简化版，不再显示预览界面
     * @param {string} imageUrl - 图片URL或base64数据
     */
    showPreview(imageUrl) {
        if (!imageUrl) {
            return;
        }
        
        // 保存图片数据
        this.imageData = imageUrl;
    }

    /**
     * 生成 JSON 数据
     * @param {string} folderName - 文件夹名称
     * @param {Array} layout - 布局信息数组
     * @param {number} sheetWidth - Spritesheet 宽度
     * @param {number} sheetHeight - Spritesheet 高度
     * @returns {string} JSON 字符串
     */
    generateJSON(folderName, layout, sheetWidth, sheetHeight) {
        const frames = {};
        
        layout.forEach((item, index) => {
            // 使用实际的帧号，确保与原始文件名一致
            const frameNum = item.frameNum ? item.frameNum.toString().padStart(2, '0') : (index + 1).toString().padStart(2, '0');
            const frameName = `${frameNum}.png`;
            const x = item.x;
            const y = item.y;
            const width = item.width;
            const height = item.height;
            
            // 标准的 TexturePacker JSON 格式，Cocos Creator 3.8 完全兼容
            frames[frameName] = {
                frame: { 
                    x: x, 
                    y: y,
                    w: width, 
                    h: height 
                },
                rotated: false,
                trimmed: false,
                spriteSourceSize: { x: 0, y: 0, w: width, h: height },
                sourceSize: { w: width, h: height }
            };
        });

        // Cocos Creator 3.8 兼容的 TexturePacker JSON 格式
        const json = {
            frames: frames,
            meta: {
                app: "https://www.codeandweb.com/texturepacker",
                version: "1.0",
                image: `${folderName}.png`,
                format: "RGBA8888",
                size: { w: sheetWidth, h: sheetHeight },
                scale: 1
            }
        };

        return JSON.stringify(json, null, 2);
    }

    /**
     * 将 Blob 转换为 Base64
     * @param {Blob} blob - Blob 对象
     * @returns {Promise<string>} Base64 字符串
     */
    blobToBase64(blob) {
        return new Promise((resolve, reject) => {
            const reader = new FileReader();
            reader.onloadend = () => {
                try {
                    let base64 = reader.result;
                    // 移除 data:image/png;base64, 前缀（如果存在）
                    if (base64 && base64.includes(',')) {
                        base64 = base64.split(',')[1];
                    }
                    if (!base64) {
                        reject(new Error('Base64 转换失败：结果为空'));
                        return;
                    }
                    resolve(base64);
                } catch (error) {
                    reject(new Error(`Base64 转换失败: ${error.message}`));
                }
            };
            reader.onerror = () => {
                reject(new Error('文件读取失败'));
            };
            reader.readAsDataURL(blob);
        });
    }

    /**
     * 下载文件
     * @param {Blob} data - 文件数据
     * @param {string} filename - 文件名
     * @param {string} mimeType - MIME 类型
     */
    downloadFile(data, filename, mimeType) {
        const blob = new Blob([data], { type: mimeType });
        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = filename;
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        URL.revokeObjectURL(url);
    }

    /**
     * 显示下载确认对话框
     */
    showDownloadConfirm() {
        // 确保预览遮罩被隐藏，避免只看到一条空白横条
        if (this.overlay) {
            this.overlay.style.display = 'none';
        }
        if (this.modal) {
            this.modal.style.display = 'none';
        }

        if (this.downloadConfirmOverlay) {
            console.log('[ExportView] 显示下载确认对话框');
            // 确保价格已加载
            this.loadVIPMattingPrice();
            this.downloadConfirmOverlay.style.display = 'flex';
        } else {
            console.error('[ExportView] 下载确认对话框元素未找到');
        }
    }

    /**
     * 隐藏下载确认对话框
     */
    hideDownloadConfirm() {
        if (this.downloadConfirmOverlay) {
            this.downloadConfirmOverlay.style.display = 'none';
        }
    }

    /**
     * 打开AI生图界面
     */
    openAIGenerateView() {
        if (!this.originalSpritesheetData) {
            this.showAlert('请先生成预览图');
            return;
        }
        
        // 通知父窗口打开AI生图界面
        if (window.parent && window.parent !== window) {
            window.parent.postMessage({
                type: 'open-ai-generate-view',
                folderName: this.folderName,
                spritesheetData: this.originalSpritesheetData,
                spritesheetLayout: this.spritesheetLayout
            }, '*');
        }
    }

    /**
     * 处理下载选项选择
     * @param {string} downloadType - 下载类型：'original', 'normal', 'vip'
     */
    async handleDownloadOption(downloadType) {
        // 如果是VIP抠图，先检查用户Ani币是否足够
        if (downloadType === 'vip') {
            const username = this.getCurrentUsername();
            if (!username) {
                this.showAlert('请先登录');
                return;
            }

            try {
                // 获取VIP抠图价格
                const pricingResponse = await fetch('/api/product-pricing');
                if (!pricingResponse.ok) {
                    throw new Error('获取价格失败');
                }
                const pricingResult = await pricingResponse.json();
                if (!pricingResult.success || !pricingResult.products) {
                    throw new Error('获取价格失败');
                }
                
                const vipMattingProduct = pricingResult.products.find(p => p.id === 'vip-matting');
                const price = vipMattingProduct ? (vipMattingProduct.price || 0) : 0;
                
                // 如果价格为0，直接继续
                if (price === 0) {
                    // 继续执行VIP抠图流程
                } else {
                    // 检查用户点数
                    const pointsResponse = await fetch(`/api/user/points?username=${encodeURIComponent(username)}`);
                    if (!pointsResponse.ok) {
                        throw new Error('获取点数失败');
                    }
                    const pointsResult = await pointsResponse.json();
                    if (!pointsResult.success) {
                        throw new Error('获取点数失败');
                    }
                    
                    const userPoints = pointsResult.points || 0;
                    
                    if (userPoints < price) {
                        // 点数不足，弹出充值界面
                        if (window.parent && window.parent !== window) {
                            window.parent.postMessage({
                                type: 'open-recharge-view',
                                needPoints: price,
                                currentPoints: userPoints
                            }, '*');
                        }
                        this.hideDownloadConfirm();
                        return;
                    }
                    
                    // 点数充足，弹出确认对话框
                    let confirmed = false;
                    if (window.parent && window.parent.GlobalConfirm) {
                        confirmed = await window.parent.GlobalConfirm.show(
                            `确定要花费 ${price} Ani币使用VIP抠图吗？`
                        );
                    } else {
                        confirmed = confirm(`确定要花费 ${price} Ani币使用VIP抠图吗？`);
                    }
                    
                    if (!confirmed) {
                        return;
                    }
                    
                    // 扣除点数
                    const deductResponse = await fetch('/api/user/deduct-points', {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json'
                        },
                        body: JSON.stringify({
                            username: username,
                            points: price
                        })
                    });
                    
                    if (!deductResponse.ok) {
                        const deductResult = await deductResponse.json();
                        throw new Error(deductResult.message || '扣除点数失败');
                    }
                    
                    const deductResult = await deductResponse.json();
                    if (!deductResult.success) {
                        throw new Error(deductResult.message || '扣除点数失败');
                    }
                    
                    // 通知父窗口刷新点数
                    if (window.parent && window.parent !== window) {
                        window.parent.postMessage({ type: 'refresh-points' }, '*');
                    }
                }

                // VIP抠图：提交到队列，显示飞走动画
                await this.submitVIPMattingToQueue(username);
                return; // 直接返回，不继续执行后续的即时处理逻辑

            } catch (error) {
                console.error('[ExportView] VIP抠图购买检查失败:', error);
                this.showAlert(error.message || '操作失败，请稍后重试');
                return;
            }
        }

        this.hideDownloadConfirm();
        
        try {
            // 显示加载状态（但不隐藏预览图片）
            // 使用全局 Loading 提示，不干扰预览图显示
            if (window.parent && window.parent.postMessage) {
                window.parent.postMessage({
                    type: 'global-loading',
                    action: 'show',
                    text: downloadType === 'original' ? '正在准备下载...' : '正在处理图片...'
                }, '*');
            }
            
            let processedImageBase64;
            
            // 确定使用的图片源
            if (this.geminiOriginalImageData) {
                // 如果有 Gemini 图片，使用 Gemini 图片
                const geminiImageBase64 = this.geminiOriginalImageData.replace(/^data:image\/\w+;base64,/, '');
                
                if (downloadType === 'original') {
                    // 源文件下载：直接使用原始图片
                    processedImageBase64 = geminiImageBase64;
                } else if (downloadType === 'normal') {
                    // 普通抠图：调用 rembg-matting.py
                    const response = await fetch('http://localhost:3000/api/matting-normal', {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json'
                        },
                        body: JSON.stringify({
                            imageBase64: geminiImageBase64
                        })
                    });
                    
                    if (!response.ok) {
                        const errorMessage = await this.handleServerError(response, '普通抠图失败');
                        throw new Error(errorMessage);
                    }
                    
                    const result = await response.json();
                    if (!result.success || !result.imageData) {
                        throw new Error('普通抠图处理失败');
                    }
                    
                    processedImageBase64 = result.imageData;
                } else if (downloadType === 'vip') {
                    // VIP抠图：调用 BiRefNet
                    const response = await fetch('http://localhost:3000/api/matting-vip', {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json'
                        },
                        body: JSON.stringify({
                            imageBase64: geminiImageBase64
                        })
                    });
                    
                    if (!response.ok) {
                        const errorMessage = await this.handleServerError(response, 'VIP抠图失败');
                        throw new Error(errorMessage);
                    }
                    
                    const result = await response.json();
                    if (!result.success || !result.imageData) {
                        throw new Error('VIP抠图处理失败');
                    }
                    
                    processedImageBase64 = result.imageData;
                }
            } else {
                // 如果没有 Gemini 图片，使用原始 spritesheet
                const imageBlob = await new Promise((resolve, reject) => {
                    this.spritesheetCanvas.toBlob((blob) => {
                        if (blob) {
                            resolve(blob);
                        } else {
                            reject(new Error('Canvas 转换失败'));
                        }
                    }, 'image/png');
                });
                
                // 将图片转换为 Base64
                const originalImageBase64 = await this.blobToBase64(imageBlob);
                
                if (downloadType === 'original') {
                    // 源文件下载：直接使用原始 spritesheet
                    processedImageBase64 = originalImageBase64;
                } else if (downloadType === 'normal') {
                    // 普通抠图：对原始 spritesheet 进行抠图
                    const response = await fetch('http://localhost:3000/api/matting-normal', {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json'
                        },
                        body: JSON.stringify({
                            imageBase64: originalImageBase64
                        })
                    });
                    
                    if (!response.ok) {
                        const errorMessage = await this.handleServerError(response, '普通抠图失败');
                        throw new Error(errorMessage);
                    }
                    
                    const result = await response.json();
                    if (!result.success || !result.imageData) {
                        throw new Error('普通抠图处理失败');
                    }
                    
                    processedImageBase64 = result.imageData;
                } else if (downloadType === 'vip') {
                    // VIP抠图：对原始 spritesheet 进行 VIP 抠图
                    const response = await fetch('http://localhost:3000/api/matting-vip', {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json'
                        },
                        body: JSON.stringify({
                            imageBase64: originalImageBase64
                        })
                    });
                    
                    if (!response.ok) {
                        const errorMessage = await this.handleServerError(response, 'VIP抠图失败');
                        throw new Error(errorMessage);
                    }
                    
                    const result = await response.json();
                    if (!result.success || !result.imageData) {
                        throw new Error('VIP抠图处理失败');
                    }
                    
                    processedImageBase64 = result.imageData;
                }
            }
            
            // 生成 JSON 数据
            const folderName = this.folderName.split('/').pop() || 'spritesheet';
            const jsonData = this.generateJSON(
                folderName,
                this.spritesheetLayout.layout,
                this.spritesheetLayout.sheetWidth,
                this.spritesheetLayout.sheetHeight
            );
            
            // 发送到服务器打包
            const response = await fetch('http://localhost:3000/api/pack', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    folderName: folderName,
                    imageData: processedImageBase64,
                    jsonData: jsonData
                })
            });

            if (!response.ok) {
                const errorMessage = await this.handleServerError(response, '打包失败');
                throw new Error(errorMessage);
            }

            // 获取 ZIP 文件的 Blob
            const zipBlob = await response.blob();
            
            // 下载 ZIP 文件
            this.downloadFile(zipBlob, `${folderName}.zip`, 'application/zip');
            
            // 隐藏全局 Loading 提示
            if (window.parent && window.parent.postMessage) {
                window.parent.postMessage({
                    type: 'global-loading',
                    action: 'hide'
                }, '*');
            }
            
            // 下载完成后，不关闭弹出框，不刷新图片
            // 显示成功提示
            this.showAlert('下载成功！');
        } catch (error) {
            // console.error('[ExportView] 下载失败:', error);
            
            // 隐藏全局 Loading 提示
            if (window.parent && window.parent.postMessage) {
                window.parent.postMessage({
                    type: 'global-loading',
                    action: 'hide'
                }, '*');
            }
            
            this.showAlert(`下载失败: ${error.message}`);
        }
    }

    /**
     * 处理下载按钮点击
     */
    async handleConfirm() {
        // console.log('[ExportView] 用户点击下载按钮');
        
        if (!this.spritesheetCanvas || !this.spritesheetLayout) {
            // console.warn('[ExportView] 没有可下载的 Spritesheet');
            return;
        }
        
        // 总是显示下载确认对话框，让用户选择下载方式
        console.log('[ExportView] 显示下载选项对话框');
        this.showDownloadConfirm();
    }
    
    /**
     * 下载 Spritesheet（原始逻辑）
     */
    async downloadSpritesheet() {
        try {
            // 生成 JSON 数据
            const folderName = this.folderName.split('/').pop() || 'spritesheet';
            const jsonData = this.generateJSON(
                folderName,
                this.spritesheetLayout.layout,
                this.spritesheetLayout.sheetWidth,
                this.spritesheetLayout.sheetHeight
            );
            
            // 确定使用哪个图片：如果有替换后的图片，使用替换后的；否则使用原始的
            let imageBase64;
            if (this.replacedImageData) {
                // 使用替换后的图片（移除 data:image/png;base64, 前缀）
                imageBase64 = this.replacedImageData.replace(/^data:image\/\w+;base64,/, '');
            } else {
                // 使用原始 spritesheet
                const imageBlob = await new Promise((resolve, reject) => {
                    this.spritesheetCanvas.toBlob((blob) => {
                        if (blob) {
                            resolve(blob);
                        } else {
                            reject(new Error('Canvas 转换失败'));
                        }
                    }, 'image/png');
                });
                
                // 将图片转换为 Base64
                imageBase64 = await this.blobToBase64(imageBlob);
            }
            
            // 验证数据
            if (!imageBase64 || typeof imageBase64 !== 'string' || imageBase64.trim().length === 0) {
                throw new Error('图片数据无效');
            }
            
            if (!jsonData || typeof jsonData !== 'string' || jsonData.trim().length === 0) {
                throw new Error('JSON 数据无效');
            }
            
            // 发送到服务器打包
            const response = await fetch('http://localhost:3000/api/pack', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    folderName: folderName,
                    imageData: imageBase64,
                    jsonData: jsonData
                })
            });

            if (!response.ok) {
                const errorMessage = await this.handleServerError(response, '打包失败');
                throw new Error(errorMessage);
            }

            // 获取 ZIP 文件的 Blob
            const zipBlob = await response.blob();
            
            // 下载 ZIP 文件
            this.downloadFile(zipBlob, `${folderName}.zip`, 'application/zip');
            
            // 下载完成后，不关闭弹出框，不刷新图片
            // 显示成功提示
            this.showAlert('下载成功！');
        } catch (error) {
            // console.error('[ExportView] 下载失败:', error);
            this.showAlert(`下载失败: ${error.message}`);
        }
    }

    /**
     * 关闭弹出框
     */
    close() {
        // console.log('[ExportView] 关闭导出弹出框');
        
        // 清空所有数据
        this.reset();

        // 隐藏界面元素
        if (this.overlay) {
            this.overlay.style.display = 'none';
        }
        if (this.modal) {
            this.modal.style.display = 'none';
        }
        this.hideDownloadConfirm();
        
        // 通知父窗口关闭弹出框
        if (window.parent && window.parent !== window) {
            window.parent.postMessage({
                type: 'close-export-view'
            }, '*');
        }
    }

    /**
     * 获取当前登录用户名
     */
    getCurrentUsername() {
        try {
            const loginDataStr = localStorage.getItem('loginData');
            if (!loginDataStr) {
                return null;
            }
            
            const loginData = JSON.parse(loginDataStr);
            const now = Date.now();
            
            // 检查是否过期
            if (now >= loginData.expireTime) {
                localStorage.removeItem('loginData');
                return null;
            }
            
            return loginData.user ? loginData.user.username : null;
        } catch (error) {
            console.error('[ExportView] 获取用户名失败:', error);
            return null;
        }
    }

    /**
     * 重置所有数据和UI状态
     */
    reset() {
        // 清空数据属性
        this.imageData = null;
        this.spritesheetCanvas = null;
        this.folderName = null;
        this.spritesheetLayout = null;
        this.replacedImageData = null;
        this.geminiOriginalImageData = null;
        this.originalSpritesheetData = null;
        this.skipPreviewUI = false;
        this.directDownloadType = null;
        
        // 重置AI按钮状态
        if (this.floatingAIBtn) {
            this.floatingAIBtn.disabled = true;
        }

        // 重置预览图区域
        if (this.previewImage) {
            this.previewImage.src = '';
            this.previewImage.classList.remove('show');
        }
        if (this.previewPlaceholder) {
            const spinner = this.previewPlaceholder.querySelector('.loading-spinner');
            const loadingText = this.previewPlaceholder.querySelector('.loading-text');
            if (spinner) spinner.style.display = 'block';
            if (loadingText) {
                loadingText.textContent = '正在生成预览图...';
                loadingText.style.color = '#6b7280';
            }
            this.previewPlaceholder.classList.remove('hide');
        }

        // 重置按钮状态
        if (this.confirmBtn) {
            this.confirmBtn.disabled = true;
        }
    }

    /**
     * 加载VIP抠图价格
     */
    async loadVIPMattingPrice() {
        try {
            const response = await fetch('/api/product-pricing');
            if (response.ok) {
                const result = await response.json();
                if (result.success && result.products) {
                    const vipMattingProduct = result.products.find(p => p.id === 'vip-matting');
                    const priceEl = document.getElementById('vipMattingPrice');
                    if (vipMattingProduct && priceEl) {
                        const price = vipMattingProduct.price || 0;
                        if (price > 0) {
                            priceEl.textContent = `${price} Ani币`;
                        } else {
                            priceEl.textContent = '免费';
                        }
                    }
                }
            }
        } catch (error) {
            console.error('[ExportView] 加载VIP抠图价格失败:', error);
            const priceEl = document.getElementById('vipMattingPrice');
            if (priceEl) {
                priceEl.textContent = '-';
            }
        }
    }

    /**
     * 提交VIP抠图任务到队列
     * @param {string} username - 用户名
     */
    async submitVIPMattingToQueue(username) {
        try {
            // 准备图片数据
            let imageBase64;
            if (this.geminiOriginalImageData) {
                imageBase64 = this.geminiOriginalImageData.replace(/^data:image\/\w+;base64,/, '');
            } else if (this.spritesheetCanvas) {
                const imageBlob = await new Promise((resolve, reject) => {
                    this.spritesheetCanvas.toBlob((blob) => {
                        if (blob) {
                            resolve(blob);
                        } else {
                            reject(new Error('Canvas 转换失败'));
                        }
                    }, 'image/png');
                });
                imageBase64 = await this.blobToBase64(imageBlob);
            } else {
                throw new Error('没有可处理的图片');
            }

            // 获取文件名
            const folderName = this.folderName ? this.folderName.split('/').pop() : 'vip-matting';

            // 提交到VIP抠图队列API
            const response = await fetch('/api/vip-matting/queue', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    username: username,
                    imageBase64: imageBase64,
                    fileName: folderName,
                    jsonData: this.spritesheetLayout ? this.generateJSON(
                        folderName,
                        this.spritesheetLayout.layout,
                        this.spritesheetLayout.sheetWidth,
                        this.spritesheetLayout.sheetHeight
                    ) : null
                })
            });

            if (!response.ok) {
                const errorData = await response.json().catch(() => ({}));
                throw new Error(errorData.message || 'VIP抠图任务提交失败');
            }

            const result = await response.json();

            if (result.success && result.taskId) {
                // 隐藏对话框
                this.hideDownloadConfirm();

                // 显示飞走动画
                this.showVIPMattingFlyAnimation();

                // 通知父窗口刷新任务历史
                if (window.parent && window.parent !== window) {
                    window.parent.postMessage({ type: 'refresh-ai-history' }, '*');
                }

                // 关闭导出视图
                setTimeout(() => {
                    this.close();
                }, 500);
            } else {
                throw new Error(result.message || 'VIP抠图任务提交失败');
            }
        } catch (error) {
            console.error('[ExportView] VIP抠图队列提交失败:', error);
            this.showAlert(error.message || 'VIP抠图任务提交失败，请稍后重试');
        }
    }

    /**
     * 显示VIP抠图飞走动画
     */
    showVIPMattingFlyAnimation() {
        let targetDocument = document;
        let targetWindow = window;

        try {
            if (window.parent && window.parent !== window && window.parent.document) {
                targetDocument = window.parent.document;
                targetWindow = window.parent;
            }
        } catch (e) {}

        const flyElement = targetDocument.createElement('div');
        flyElement.innerHTML = `
            <div style="display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; white-space: nowrap;">
                <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M12 2L15.09 8.26L22 9.27L17 14.14L18.18 21.02L12 17.77L5.82 21.02L7 14.14L2 9.27L8.91 8.26L12 2Z"/>
                </svg>
                <span>VIP抠图任务</span>
            </div>
        `;

        let startLeft = targetWindow.innerWidth / 2;
        let startTop = targetWindow.innerHeight / 2;

        flyElement.style.cssText = `
            position: fixed;
            left: ${startLeft}px;
            top: ${startTop}px;
            z-index: 999999;
            pointer-events: none;
            transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            opacity: 1;
            transform: scale(1);
            background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
            color: white;
            padding: 12px 20px;
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(139, 92, 246, 0.4);
            display: flex;
            align-items: center;
            gap: 8px;
        `;

        targetDocument.body.appendChild(flyElement);

        requestAnimationFrame(() => {
            flyElement.style.left = `${targetWindow.innerWidth - 100}px`;
            flyElement.style.top = '50px';
            flyElement.style.opacity = '0';
            flyElement.style.transform = 'scale(0.3)';
        });

        setTimeout(() => {
            if (window.parent && window.parent.HintView) {
                window.parent.HintView.success('VIP抠图任务已添加到「我的」-「任务历史」，请稍后查看', 3000);
            }
        }, 300);

        setTimeout(() => {
            if (flyElement.parentNode) {
                flyElement.parentNode.removeChild(flyElement);
            }
        }, 1000);
    }

    /**
     * 显示提示信息（使用全局 Alert 组件，直接调用）
     * @param {string} message - 提示信息
     * @param {number} duration - 显示时长（毫秒），默认2000
     */
    showAlert(message, duration = 2000) {
        // 直接调用父窗口的 GlobalAlert（不通过 postMessage）
        try {
            // 优先使用父窗口的 GlobalAlert
            if (window.parent && window.parent !== window && window.parent.GlobalAlert) {
                window.parent.GlobalAlert.show(message, duration);
                return;
            }

            // 如果不在 iframe 中，直接使用当前窗口的 GlobalAlert
            if (window.GlobalAlert) {
                window.GlobalAlert.show(message, duration);
                return;
            }

            // 降级处理
            console.log('[Alert]', message);
        } catch (error) {
            console.error('[ExportView] 显示 alert 失败:', error);
            alert(message);
        }
    }

    // 统一的错误处理函数：解析服务端错误响应并显示
    async handleServerError(response, defaultMessage = '操作失败') {
        let errorMessage = defaultMessage;
        
        try {
            // 尝试解析 JSON 错误响应
            const errorData = await response.json().catch(() => null);
            if (errorData) {
                // 优先使用服务端返回的 message
                if (errorData.message) {
                    errorMessage = errorData.message;
                } else if (errorData.error) {
                    errorMessage = errorData.error;
                } else if (typeof errorData === 'string') {
                    errorMessage = errorData;
                }
            }
        } catch (e) {
            // 如果解析失败，使用默认消息或状态码
            if (response.status) {
                errorMessage = `${defaultMessage} (状态码: ${response.status})`;
            }
        }
        
        this.showAlert(errorMessage);
        return errorMessage;
    }
}

// 初始化
window.ExportView = new ExportView();