{{define "content"}}
<div class="max-w-4xl mx-auto">
    <!-- 页面标题 -->
    <div class="text-center mb-8">
        <h1 class="text-3xl font-bold text-gray-900 mb-4">📤 文件上传</h1>
        <p class="text-lg text-gray-600">
            支持拖拽上传、多文件批量上传、进度显示。最大支持64TB文件。
        </p>
    </div>

    {{if .Success}}
    <!-- 上传成功提示 -->
    <div class="bg-green-50 border border-green-200 rounded-lg p-6 mb-8">
        <div class="text-center">
            <div class="text-4xl mb-4">✅</div>
            <h2 class="text-xl font-bold text-green-800 mb-4">文件上传成功！</h2>
            
            <div class="bg-white p-4 rounded-lg border mb-4">
                <div class="text-left space-y-2">
                    <p><strong>文件名：</strong>{{.FileInfo.FileName}}</p>
                    <p><strong>文件大小：</strong><span id="fileSize">{{.FileInfo.FileSize}}</span> 字节</p>
                    <p><strong>上传时间：</strong>{{.FileInfo.UploadTime.Format "2006-01-02 15:04:05"}}</p>
                    <p><strong>过期时间：</strong>{{.FileInfo.ExpiryTime.Format "2006-01-02 15:04:05"}}</p>
                </div>
            </div>
            
            <div class="bg-blue-50 p-4 rounded-lg mb-4">
                <p class="text-sm text-gray-600 mb-2">您的取件码：</p>
                <div class="text-3xl font-bold text-blue-600 mb-2" id="shareCode">{{.FileInfo.Code}}</div>
                <button onclick="copyCode('{{.FileInfo.Code}}')" class="bg-blue-500 hover:bg-blue-600 text-white px-4 py-2 rounded text-sm">
                    📋 复制取件码
                </button>
            </div>
            
            <div class="space-y-3">
                <a href="{{.FileInfo.DownloadURL}}" class="bg-green-500 hover:bg-green-600 text-white px-6 py-3 rounded-lg inline-block">
                    ⬇️ 直接下载
                </a>
                <br>
                <button onclick="shareFile('{{.FileInfo.Code}}')" class="bg-purple-500 hover:bg-purple-600 text-white px-6 py-3 rounded-lg">
                    🔗 分享文件
                </button>
            </div>
        </div>
    </div>
    {{end}}

    <!-- 上传区域 -->
    <div class="bg-white rounded-lg shadow-md p-8">
        <form id="uploadForm" enctype="multipart/form-data" method="post">
            <!-- 拖拽上传区域 -->
            <div id="dropZone" class="border-2 border-dashed border-gray-300 rounded-lg p-12 text-center hover:border-blue-400 transition-colors">
                <div id="dropZoneContent">
                    <div class="text-6xl mb-4">📁</div>
                    <h3 class="text-xl font-semibold mb-2">拖拽文件到此处</h3>
                    <p class="text-gray-600 mb-4">或者点击选择文件</p>
                    <input type="file" id="fileInput" name="file" multiple class="hidden">
                    <button type="button" onclick="document.getElementById('fileInput').click()" 
                            class="bg-blue-500 hover:bg-blue-600 text-white px-6 py-3 rounded-lg font-semibold">
                        选择文件
                    </button>
                </div>
            </div>

            <!-- 文件列表 -->
            <div id="fileList" class="mt-6 hidden">
                <h3 class="text-lg font-semibold mb-3">选中的文件：</h3>
                <div id="files"></div>
            </div>

            <!-- 上传按钮 -->
            <div id="uploadSection" class="mt-6 text-center hidden">
                <button type="submit" id="uploadBtn" 
                        class="bg-green-500 hover:bg-green-600 text-white px-8 py-3 rounded-lg font-semibold text-lg">
                    🚀 开始上传
                </button>
            </div>
        </form>

        <!-- 上传进度 -->
        <div id="uploadProgress" class="mt-6 hidden">
            <div class="mb-3">
                <div class="flex justify-between text-sm text-gray-600">
                    <span>上传进度</span>
                    <span id="progressText">0%</span>
                </div>
                <div class="w-full bg-gray-200 rounded-full h-2">
                    <div id="progressBar" class="bg-blue-500 h-2 rounded-full transition-all duration-300" style="width: 0%"></div>
                </div>
            </div>
            <div id="uploadStatus" class="text-center text-gray-600"></div>
        </div>
    </div>

    <!-- 格式转换 -->
    <div class="bg-white rounded-lg shadow-md p-8 mt-8">
        <h2 class="text-xl font-bold mb-4">📚 Kindle格式转换</h2>
        <p class="text-gray-600 mb-4">
            专为Kindle用户提供EPUB到MOBI格式转换服务。上传EPUB文件后自动转换为MOBI格式。
        </p>
        <div class="bg-yellow-50 border border-yellow-200 rounded-lg p-4">
            <p class="text-yellow-800">
                💡 <strong>提示：</strong>格式转换功能正在开发中，敬请期待。
            </p>
        </div>
    </div>

    <!-- 技术说明 -->
    <div class="bg-gray-50 rounded-lg p-8 mt-8">
        <h2 class="text-xl font-bold mb-4">🔧 技术特性</h2>
        <div class="grid md:grid-cols-2 gap-6">
            <div>
                <h3 class="font-semibold mb-2">✨ 拖拽上传</h3>
                <p class="text-gray-600 text-sm">支持拖拽文件到页面，HTML5 File API优化用户体验。</p>
            </div>
            <div>
                <h3 class="font-semibold mb-2">📊 进度显示</h3>
                <p class="text-gray-600 text-sm">实时显示上传进度，支持多文件批量上传。</p>
            </div>
            <div>
                <h3 class="font-semibold mb-2">🔄 断点续传</h3>
                <p class="text-gray-600 text-sm">大文件分片上传，网络中断后可继续上传。</p>
            </div>
            <div>
                <h3 class="font-semibold mb-2">🛡️ 安全存储</h3>
                <p class="text-gray-600 text-sm">24小时自动清理，保护用户隐私和服务器空间。</p>
            </div>
        </div>
    </div>
</div>
{{end}}

{{define "scripts"}}
<script>
// 文件上传相关变量
let selectedFiles = [];
let uploadInProgress = false;

// DOM元素
const dropZone = document.getElementById('dropZone');
const fileInput = document.getElementById('fileInput');
const fileList = document.getElementById('fileList');
const filesContainer = document.getElementById('files');
const uploadSection = document.getElementById('uploadSection');
const uploadForm = document.getElementById('uploadForm');
const uploadProgress = document.getElementById('uploadProgress');
const progressBar = document.getElementById('progressBar');
const progressText = document.getElementById('progressText');
const uploadStatus = document.getElementById('uploadStatus');

// 拖拽事件处理
dropZone.addEventListener('dragover', (e) => {
    e.preventDefault();
    dropZone.classList.add('border-blue-400', 'bg-blue-50');
});

dropZone.addEventListener('dragleave', (e) => {
    e.preventDefault();
    dropZone.classList.remove('border-blue-400', 'bg-blue-50');
});

dropZone.addEventListener('drop', (e) => {
    e.preventDefault();
    dropZone.classList.remove('border-blue-400', 'bg-blue-50');
    
    const files = Array.from(e.dataTransfer.files);
    handleFiles(files);
});

// 文件选择事件
fileInput.addEventListener('change', (e) => {
    const files = Array.from(e.target.files);
    handleFiles(files);
});

// 处理选中的文件
function handleFiles(files) {
    selectedFiles = files;
    displayFiles();
    
    if (files.length > 0) {
        fileList.classList.remove('hidden');
        uploadSection.classList.remove('hidden');
    }
}

// 显示文件列表
function displayFiles() {
    filesContainer.innerHTML = '';
    
    selectedFiles.forEach((file, index) => {
        const fileDiv = document.createElement('div');
        fileDiv.className = 'flex items-center justify-between bg-gray-50 p-3 rounded-lg mb-2';
        
        fileDiv.innerHTML = `
            <div class="flex items-center">
                <span class="text-2xl mr-3">${getFileIcon(file.type)}</span>
                <div>
                    <div class="font-medium">${file.name}</div>
                    <div class="text-sm text-gray-500">${formatFileSize(file.size)}</div>
                </div>
            </div>
            <button type="button" onclick="removeFile(${index})" 
                    class="text-red-500 hover:text-red-700 p-1">
                ❌
            </button>
        `;
        
        filesContainer.appendChild(fileDiv);
    });
}

// 移除文件
function removeFile(index) {
    selectedFiles.splice(index, 1);
    displayFiles();
    
    if (selectedFiles.length === 0) {
        fileList.classList.add('hidden');
        uploadSection.classList.add('hidden');
    }
}

// 获取文件图标
function getFileIcon(type) {
    if (type.startsWith('image/')) return '🖼️';
    if (type.startsWith('video/')) return '🎥';
    if (type.startsWith('audio/')) return '🎵';
    if (type.includes('pdf')) return '📄';
    if (type.includes('text')) return '📝';
    if (type.includes('zip') || type.includes('rar')) return '📦';
    return '📁';
}

// 格式化文件大小
function formatFileSize(bytes) {
    if (bytes === 0) return '0 Bytes';
    const k = 1024;
    const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
}

// 表单提交处理
uploadForm.addEventListener('submit', async (e) => {
    e.preventDefault();
    
    if (uploadInProgress || selectedFiles.length === 0) {
        return;
    }
    
    uploadInProgress = true;
    showUploadProgress();
    
    try {
        // 这里简化处理，实际应该支持分片上传
        const formData = new FormData();
        formData.append('file', selectedFiles[0]); // 暂时只处理第一个文件
        
        const xhr = new XMLHttpRequest();
        
        // 监听上传进度
        xhr.upload.addEventListener('progress', (e) => {
            if (e.lengthComputable) {
                const percentComplete = (e.loaded / e.total) * 100;
                updateProgress(percentComplete);
            }
        });
        
        // 上传完成处理
        xhr.addEventListener('load', () => {
            if (xhr.status === 200) {
                updateProgress(100);
                uploadStatus.textContent = '上传成功！正在跳转...';
                setTimeout(() => {
                    location.reload();
                }, 1000);
            } else {
                throw new Error('上传失败');
            }
        });
        
        // 错误处理
        xhr.addEventListener('error', () => {
            throw new Error('网络错误');
        });
        
        xhr.open('POST', '/upload');
        xhr.setRequestHeader('Accept', 'application/json');
        xhr.send(formData);
        
    } catch (error) {
        uploadStatus.textContent = '上传失败: ' + error.message;
        uploadInProgress = false;
    }
});

// 显示上传进度
function showUploadProgress() {
    uploadProgress.classList.remove('hidden');
    uploadSection.classList.add('hidden');
    uploadStatus.textContent = '正在上传文件...';
}

// 更新进度
function updateProgress(percent) {
    progressBar.style.width = percent + '%';
    progressText.textContent = Math.round(percent) + '%';
}

// 复制取件码
function copyCode(code) {
    navigator.clipboard.writeText(code).then(() => {
        alert('取件码已复制到剪贴板: ' + code);
    }).catch(() => {
        // 兼容性处理
        const textArea = document.createElement('textarea');
        textArea.value = code;
        document.body.appendChild(textArea);
        textArea.select();
        document.execCommand('copy');
        document.body.removeChild(textArea);
        alert('取件码已复制到剪贴板: ' + code);
    });
}

// 分享文件
function shareFile(code) {
    const shareUrl = `${window.location.origin}/download/${code}`;
    const shareText = `文件分享\n取件码: ${code}\n下载链接: ${shareUrl}\n有效期: 24小时`;
    
    if (navigator.share) {
        navigator.share({
            title: '文件分享',
            text: shareText,
            url: shareUrl
        });
    } else {
        copyCode(shareText);
        alert('分享信息已复制到剪贴板');
    }
}

// 页面加载时格式化文件大小
document.addEventListener('DOMContentLoaded', () => {
    const fileSizeElement = document.getElementById('fileSize');
    if (fileSizeElement) {
        const bytes = parseInt(fileSizeElement.textContent);
        fileSizeElement.textContent = formatFileSize(bytes);
    }
});
</script>
{{end}}