<?php
// 服务器端直接处理表单提交，无需AJAX
$message = '';
$messageType = 'success';

// 处理保存数据
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action'])) {
    $action = $_POST['action'];
    $file = 'sq.txt';
    
    // 确保文件存在并可写
    if (!file_exists($file)) {
        $fp = fopen($file, 'w');
        fclose($fp);
        chmod($file, 0666);
    }
    
    switch($action) {
        // 保存数据
        case 'save':
            $content = $_POST['content'] ?? '';
            $expiryOption = $_POST['expiryOption'] ?? '1d';
            $customExpiry = $_POST['customExpiry'] ?? '';
            
            if (empty($content)) {
                $message = '错误：文本内容不能为空！';
                $messageType = 'error';
                break;
            }
            
            // 计算过期时间
            if ($expiryOption === 'custom' && !empty($customExpiry)) {
                $expiryDate = new DateTime($customExpiry);
            } else {
                $expiryDate = new DateTime();
                switch($expiryOption) {
                    case '1h': $expiryDate->add(new DateInterval('PT1H')); break;
                    case '6h': $expiryDate->add(new DateInterval('PT6H')); break;
                    case '1d': $expiryDate->add(new DateInterval('P1D')); break;
                    case '3d': $expiryDate->add(new DateInterval('P3D')); break;
                    case '7d': $expiryDate->add(new DateInterval('P7D')); break;
                    case '30d': $expiryDate->add(new DateInterval('P30D')); break;
                }
            }
            
            // 生成ID
            $id = uniqid() . '-' . rand(1000, 9999);
            
            // 创建数据
            $data = [
                'id' => $id,
                'content' => $content,
                'expiry' => $expiryDate->format('Y-m-d H:i:s'),
                'createdAt' => (new DateTime())->format('Y-m-d H:i:s')
            ];
            
            // 写入文件（每行一个JSON对象）
            $dataLine = json_encode($data, JSON_UNESCAPED_UNICODE) . "\n";
            $success = file_put_contents($file, $dataLine, FILE_APPEND);
            
            if ($success) {
                $message = '成功：数据已保存到 sq.txt 文件！';
            } else {
                $message = '错误：文件写入失败，请检查 sq.txt 权限！';
                $messageType = 'error';
            }
            break;
        
        // 删除数据
        case 'delete':
            $id = $_POST['id'] ?? '';
            if (empty($id)) {
                $message = '错误：缺少数据ID！';
                $messageType = 'error';
                break;
            }
            
            $lines = file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
            $newLines = [];
            foreach ($lines as $line) {
                $item = json_decode($line, true);
                if (is_array($item) && $item['id'] != $id) {
                    $newLines[] = $line;
                }
            }
            
            $success = file_put_contents($file, implode("\n", $newLines) . "\n");
            if ($success) {
                $message = '成功：数据已删除！';
            } else {
                $message = '错误：删除失败，请检查文件权限！';
                $messageType = 'error';
            }
            break;
        
        // 清理过期数据
        case 'clean':
            $lines = file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
            $newLines = [];
            $now = new DateTime();
            $deleted = 0;
            
            foreach ($lines as $line) {
                $item = json_decode($line, true);
                if (is_array($item) && isset($item['expiry'])) {
                    $expiryDate = new DateTime($item['expiry']);
                    if ($expiryDate > $now) {
                        $newLines[] = $line;
                    } else {
                        $deleted++;
                    }
                } else {
                    $newLines[] = $line;
                }
            }
            
            $success = file_put_contents($file, implode("\n", $newLines) . "\n");
            if ($success) {
                $message = "成功：已清理 $deleted 条过期数据！";
            } else {
                $message = '错误：清理失败，请检查文件权限！';
                $messageType = 'error';
            }
            break;
    }
}

// 加载数据
$file = 'sq.txt';
$dataList = [];
$totalCount = 0;
$expiredCount = 0;

if (file_exists($file)) {
    $lines = file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    $totalCount = count($lines);
    $now = new DateTime();
    
    foreach ($lines as $line) {
        $item = json_decode($line, true);
        if (is_array($item)) {
            // 检查是否过期
            $expiryDate = new DateTime($item['expiry']);
            $item['isExpired'] = $expiryDate <= $now;
            if ($item['isExpired']) {
                $expiredCount++;
            }
            $dataList[] = $item;
        }
    }
}
?>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>文本存储系统（纯PHP版）</title>
  <!-- 引入Tailwind CSS -->
  <script src="https://cdn.tailwindcss.com"></script>
  <!-- 引入Font Awesome -->
  <link href="https://cdn.jsdelivr.net/npm/font-awesome@4.7.0/css/font-awesome.min.css" rel="stylesheet">
  
  <style>
    body {
      background-color: #f8fafc;
      padding: 20px;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    }
    .container {
      max-width: 1000px;
      margin: 0 auto;
    }
    .card {
      background: white;
      border-radius: 12px;
      padding: 24px;
      margin-bottom: 24px;
      box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 16px;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      font-size: 14px;
      font-weight: 500;
      transition: background-color 0.2s;
    }
    .btn-primary {
      background-color: #3b82f6;
      color: white;
    }
    .btn-primary:hover {
      background-color: #2563eb;
    }
    .btn-danger {
      background-color: #ef4444;
      color: white;
    }
    .btn-danger:hover {
      background-color: #dc2626;
    }
    .btn-warning {
      background-color: #f59e0b;
      color: white;
    }
    .btn-warning:hover {
      background-color: #d97706;
    }
    .alert {
      padding: 12px 16px;
      border-radius: 6px;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .alert-success {
      background-color: #dcfce7;
      color: #166534;
    }
    .alert-error {
      background-color: #fee2e2;
      color: #991b1b;
    }
    textarea {
      width: 100%;
      padding: 12px;
      border: 1px solid #e2e8f0;
      border-radius: 6px;
      min-height: 100px;
      margin-bottom: 16px;
      font-size: 14px;
      resize: vertical;
    }
    select, input[type="datetime-local"] {
      padding: 10px;
      border: 1px solid #e2e8f0;
      border-radius: 6px;
      margin-right: 8px;
      font-size: 14px;
      min-width: 180px;
    }
    table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 16px;
      font-size: 14px;
    }
    th, td {
      padding: 12px 16px;
      text-align: left;
      border-bottom: 1px solid #f1f5f9;
    }
    th {
      background-color: #f8fafc;
      font-weight: 600;
      color: #334155;
    }
    .expired {
      color: #94a3b8;
      opacity: 0.7;
    }
    .status-badge {
      padding: 4px 8px;
      border-radius: 12px;
      font-size: 12px;
      font-weight: 500;
    }
    .badge-success {
      background-color: #dcfce7;
      color: #166534;
    }
    .badge-expired {
      background-color: #f1f5f9;
      color: #64748b;
    }
    .header {
      text-align: center;
      margin-bottom: 32px;
      color: #1e293b;
    }
    .header h1 {
      font-size: 28px;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
    }
    .header p {
      color: #64748b;
      font-size: 14px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      margin-bottom: 8px;
      color: #334155;
      font-weight: 500;
    }
    .form-hint {
      font-size: 12px;
      color: #64748b;
      margin-top: 4px;
    }
    .action-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .stats {
      color: #64748b;
      font-size: 14px;
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="header">
      <h1>
        <i class="fa fa-database" style="color: #3b82f6;"></i> 文本存储系统
      </h1>
      <p>数据直接保存到服务器 sq.txt 文件，支持自动过期清理</p>
    </div>

    <!-- 消息提示 -->
    <?php if (!empty($message)): ?>
    <div class="alert alert-<?php echo $messageType; ?>">
      <i class="fa fa-<?php echo $messageType === 'success' ? 'check-circle' : 'exclamation-circle'; ?>"></i>
      <?php echo $message; ?>
    </div>
    <?php endif; ?>

    <!-- 提交表单 -->
    <div class="card">
      <h2 style="color: #1e293b; margin-top: 0; margin-bottom: 20px;">提交文本数据</h2>
      <form method="POST" action="">
        <input type="hidden" name="action" value="save">
        
        <div class="form-group">
          <label class="form-label" for="content">文本内容 <span style="color: #ef4444;">*</span></label>
          <textarea id="content" name="content" placeholder="请输入要存储的文本内容..." required><?php echo isset($_POST['content']) ? htmlspecialchars($_POST['content']) : ''; ?></textarea>
          <p class="form-hint">支持中文、特殊字符，内容将原样保存</p>
        </div>
        
        <div class="form-group">
          <label class="form-label">过期时间 <span style="color: #ef4444;">*</span></label>
          <div style="display: flex; align-items: center; gap: 10px; flex-wrap: wrap;">
            <select name="expiryOption" id="expiryOption" onchange="toggleCustomExpiry()">
              <option value="1h" <?php echo (isset($_POST['expiryOption']) && $_POST['expiryOption'] === '1h') ? 'selected' : ''; ?>>1小时后</option>
              <option value="6h" <?php echo (isset($_POST['expiryOption']) && $_POST['expiryOption'] === '6h') ? 'selected' : ''; ?>>6小时后</option>
              <option value="1d" <?php echo (!isset($_POST['expiryOption']) || $_POST['expiryOption'] === '1d') ? 'selected' : ''; ?>>1天后</option>
              <option value="3d" <?php echo (isset($_POST['expiryOption']) && $_POST['expiryOption'] === '3d') ? 'selected' : ''; ?>>3天后</option>
              <option value="7d" <?php echo (isset($_POST['expiryOption']) && $_POST['expiryOption'] === '7d') ? 'selected' : ''; ?>>7天后</option>
              <option value="30d" <?php echo (isset($_POST['expiryOption']) && $_POST['expiryOption'] === '30d') ? 'selected' : ''; ?>>30天后</option>
              <option value="custom" <?php echo (isset($_POST['expiryOption']) && $_POST['expiryOption'] === 'custom') ? 'selected' : ''; ?>>自定义日期</option>
            </select>
            <input type="datetime-local" name="customExpiry" id="customExpiry" 
                   value="<?php echo isset($_POST['customExpiry']) ? $_POST['customExpiry'] : ''; ?>"
                   style="display: <?php echo (isset($_POST['expiryOption']) && $_POST['expiryOption'] === 'custom') ? 'inline-block' : 'none'; ?>;">
          </div>
          <p class="form-hint">过期后的数据可通过"清理过期数据"按钮删除</p>
        </div>
        
        <button type="submit" class="btn btn-primary">
          <i class="fa fa-save"></i> 保存到 sq.txt
        </button>
      </form>
    </div>

    <!-- 数据列表 -->
    <div class="card">
      <h2 style="color: #1e293b; margin-top: 0; margin-bottom: 20px;">已存储数据</h2>
      
      <div class="action-bar">
        <div class="stats">
          数据总数: <strong><?php echo $totalCount; ?></strong> | 
          过期数据: <strong><?php echo $expiredCount; ?></strong>
        </div>
        <form method="POST" action="" onsubmit="return confirm('确定要清理所有过期数据吗？');">
          <input type="hidden" name="action" value="clean">
          <button type="submit" class="btn btn-warning">
            <i class="fa fa-trash"></i> 清理过期数据
          </button>
        </form>
      </div>
      
      <div style="overflow-x: auto;">
        <table>
          <thead>
            <tr>
              <th>ID</th>
              <th>文本内容</th>
              <th>创建时间</th>
              <th>过期时间</th>
              <th>状态</th>
              <th>操作</th>
            </tr>
          </thead>
          <tbody>
            <?php if (empty($dataList)): ?>
            <tr>
              <td colspan="6" style="text-align: center; padding: 30px; color: #64748b;">
                <i class="fa fa-folder-open-o" style="font-size: 24px; margin-bottom: 8px; display: block;"></i>
                暂无存储数据
              </td>
            </tr>
            <?php else: ?>
            <?php foreach ($dataList as $item): ?>
            <tr class="<?php echo $item['isExpired'] ? 'expired' : ''; ?>">
              <td><?php echo htmlspecialchars($item['id']); ?></td>
              <td style="max-width: 250px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;" 
                  title="<?php echo htmlspecialchars($item['content']); ?>">
                <?php echo htmlspecialchars($item['content']); ?>
              </td>
              <td><?php echo htmlspecialchars($item['createdAt']); ?></td>
              <td><?php echo htmlspecialchars($item['expiry']); ?></td>
              <td>
                <span class="status-badge <?php echo $item['isExpired'] ? 'badge-expired' : 'badge-success'; ?>">
                  <?php echo $item['isExpired'] ? '已过期' : '有效'; ?>
                </span>
              </td>
              <td>
                <form method="POST" action="" onsubmit="return confirm('确定要删除这条数据吗？');" style="margin: 0;">
                  <input type="hidden" name="action" value="delete">
                  <input type="hidden" name="id" value="<?php echo htmlspecialchars($item['id']); ?>">
                  <button type="submit" class="btn btn-danger" style="padding: 6px 12px; font-size: 12px;">
                    <i class="fa fa-trash-o"></i> 删除
                  </button>
                </form>
              </td>
            </tr>
            <?php endforeach; ?>
            <?php endif; ?>
          </tbody>
        </table>
      </div>
    </div>
  </div>

  <script>
    // 切换自定义过期时间显示
    function toggleCustomExpiry() {
      const expiryOption = document.getElementById('expiryOption');
      const customExpiry = document.getElementById('customExpiry');
      customExpiry.style.display = expiryOption.value === 'custom' ? 'inline-block' : 'none';
      
      // 设置默认值为当前时间+1小时
      if (expiryOption.value === 'custom' && !customExpiry.value) {
        const now = new Date();
        now.setHours(now.getHours() + 1);
        customExpiry.value = now.toISOString().slice(0, 16);
      }
    }
    
    // 页面加载时初始化
    window.onload = function() {
      toggleCustomExpiry();
    };
  </script>
</body>
</html>