// 导出功能
function showExportDialog() {
  document.getElementById('exportModal').classList.add('show');
}

function closeExportModal() {
  document.getElementById('exportModal').classList.remove('show');
}

async function doExport(format) {
  closeExportModal();
  showToast('正在导出...');
  try {
    const res = await fetch(API + '/api/export?format=' + format, { headers: headers() });
    if (!res.ok) {
      const err = await res.json();
      showToast(err.error || '导出失败');
      return;
    }
    const disposition = res.headers.get('Content-Disposition');
    let filename = 'gamer-export.' + format;
    if (disposition) {
      const match = disposition.match(/filename="?([^"]+)"?/);
      if (match) filename = match[1];
    }
    const blob = await res.blob();
    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);
    showToast('导出成功');
  } catch (e) {
    showToast('导出失败: 网络错误');
  }
}

// 导入功能
let pendingImportContent = null;

function triggerImport() {
  document.getElementById('importFileInput').value = '';
  document.getElementById('importFileInput').click();
}

function handleImportFile(event) {
  const file = event.target.files[0];
  if (!file) return;
  const ext = file.name.split('.').pop().toLowerCase();
  if (ext !== 'json' && ext !== 'csv') {
    showToast('请选择 JSON 或 CSV 文件');
    return;
  }
  const reader = new FileReader();
  reader.onload = function(e) {
    const content = e.target.result;
    pendingImportContent = content;
    let count = 0;
    try {
      const trimmed = content.replace(/^\uFEFF/, '').trim();
      if (trimmed.startsWith('{')) {
        const data = JSON.parse(trimmed);
        count = data.recordCount || (data.records ? data.records.length : 0);
      } else {
        count = Math.max(0, trimmed.split('\n').filter(l => l.trim()).length - 1);
      }
    } catch (err) {
      showToast('文件格式无法识别');
      return;
    }
    document.getElementById('importConfirmMsg').textContent =
      '文件: ' + file.name + '\n检测到 ' + count + ' 条记录，确认导入？\n（重复记录将自动跳过）';
    document.getElementById('importConfirmModal').classList.add('show');
  };
  reader.readAsText(file, 'UTF-8');
}

function closeImportConfirm() {
  document.getElementById('importConfirmModal').classList.remove('show');
  pendingImportContent = null;
}

async function confirmImport() {
  document.getElementById('importConfirmModal').classList.remove('show');
  if (!pendingImportContent) return;
  showToast('正在导入...');
  try {
    const res = await fetch(API + '/api/import', {
      method: 'POST',
      headers: { 'Content-Type': 'text/plain; charset=utf-8', 'Authorization': 'Bearer ' + token },
      body: pendingImportContent
    });
    const data = await res.json();
    if (!res.ok) {
      showToast(data.error || '导入失败');
      return;
    }
    showToast('导入完成: ' + data.imported + '条新增, ' + data.skipped + '条跳过');
    pendingImportContent = null;
    loadStats();
    loadTotalStats();
  } catch (e) {
    showToast('导入失败: 网络错误');
  }
}