// 采购需求清单管理
(() => {
  let demandList = [];
  let productList = [];
  let currentPage = 1;
  const pageSize = 20;

  const statusMap = {
    'pending': { text: '待处理', color: 'var(--warning)' },
    'ordered': { text: '已下单', color: 'var(--info)' },
    'received': { text: '已收货', color: 'var(--primary)' },
    'completed': { text: '已完成', color: 'var(--success)' },
    'cancelled': { text: '已取消', color: 'var(--text-2)' }
  };

  Router.register('/plan-mgmt/purchase-demand', async () => {
    const html = `
      <style>
        #purchase-demand-page .page-header {
          padding: 20px;
          background: var(--surface);
          border-bottom: 1px solid var(--border);
          flex-shrink: 0;
        }
        
        #purchase-demand-page .content-area {
          flex: 1;
          padding: 20px;
          overflow: hidden;
          display: flex;
          flex-direction: column;
        }
        
        #purchase-demand-page .table-wrapper {
          flex: 1;
          overflow: auto;
          background: var(--surface);
          border: 1px solid var(--border);
          border-radius: 12px;
        }
        
        #purchase-demand-page table {
          width: 100%;
          border-collapse: collapse;
          margin: 0;
        }
        
        #purchase-demand-page thead {
          background: var(--border);
          position: sticky;
          top: 0;
          z-index: 10;
        }
        
        #purchase-demand-page th {
          padding: 8px 12px;
          text-align: left;
          font-weight: 600;
          color: var(--text);
          border-bottom: 2px solid var(--border);
          font-size: 14px;
          white-space: nowrap;
        }
        
        #purchase-demand-page td {
          padding: 8px 12px;
          border-bottom: 1px solid var(--border);
          color: var(--text);
          font-size: 14px;
        }
        
        #purchase-demand-page tbody tr:last-child td {
          border-bottom: none;
        }
        
        #purchase-demand-page tbody tr:hover {
          background: var(--hover);
        }
        
        #purchase-demand-page .text-center {
          text-align: center;
          color: var(--text-2);
        }
        
        #purchase-demand-page .btn-text {
          background: none;
          border: none;
          color: var(--primary);
          cursor: pointer;
          padding: 4px 8px;
          margin-right: 8px;
        }
        
        #purchase-demand-page .btn-text:hover {
          text-decoration: underline;
        }
        
        #purchase-demand-page .btn-danger {
          color: var(--danger);
        }
        
        #purchase-demand-page .btn {
          color: var(--text);
        }
        
        #purchase-demand-page .btn.btn-danger {
          color: white;
        }
        
        #purchase-demand-page .btn.btn-primary {
          color: white;
        }
        
        #purchase-demand-page .btn.btn-secondary {
          color: var(--text);
        }
        
        #purchase-demand-page .btn-sm {
          color: var(--text);
        }
        
        #purchase-demand-page .btn-sm.btn-danger {
          color: white;
        }
        
        #purchase-demand-page .btn-sm.btn-secondary {
          color: var(--text);
        }
        
        #purchase-demand-page .product-tabs-wrapper {
          display: flex;
          gap: 12px;
          flex-wrap: wrap;
          margin-bottom: 20px;
        }
        
        #purchase-demand-page .product-tab {
          min-width: 100px;
          height: 51px;
          border-radius: 15px;
          cursor: pointer;
          transition: 0.3s ease;
          background: linear-gradient(
            to bottom right,
            #2e8eff 0%,
            rgba(46, 142, 255, 0) 30%
          );
          background-color: rgba(46, 142, 255, 0.2);
          display: flex;
          align-items: center;
          justify-content: center;
          border: none;
          padding: 2px;
        }
        
        #purchase-demand-page .product-tab:hover,
        #purchase-demand-page .product-tab:focus {
          background-color: rgba(46, 142, 255, 0.7);
          box-shadow: 0 0 10px rgba(46, 142, 255, 0.5);
          outline: none;
        }
        
        #purchase-demand-page .product-tab.active {
          background-color: rgba(46, 142, 255, 0.9);
          box-shadow: 0 0 15px rgba(46, 142, 255, 0.7);
        }
        
        #purchase-demand-page .product-tab-inner {
          width: 100%;
          height: 47px;
          border-radius: 13px;
          background-color: var(--bg);
          display: flex;
          align-items: center;
          justify-content: center;
          padding: 0 20px;
          color: #66b3ff;
          font-weight: 600;
          font-size: 14px;
          text-shadow: 0 0 2px rgba(102, 179, 255, 0.5);
        }
        
        [data-theme="light"] #purchase-demand-page .product-tab-inner {
          color: #0066cc;
          text-shadow: none;
        }
        
        #purchase-demand-page .product-tab.active .product-tab-inner {
          color: #003d7a;
          font-weight: 700;
        }
      </style>
      
      <div id="purchase-demand-page">
        <div class="page-header">
          <h1 style="margin: 0; font-size: 24px;">采购需求清单</h1>
          <div class="page-actions" style="margin-top: 16px;">
            <button id="calc-demand-btn" class="btn btn-primary" style="margin-right: 10px;">计算采购需求</button>
            <button id="import-excel-btn" class="btn btn-secondary" style="margin-right: 10px;">导入 Excel</button>
            <button id="export-excel-btn" class="btn btn-secondary" style="margin-right: 10px;" onclick="PurchaseDemand.exportExcel()">导出 Excel</button>
            <button id="sync-stock-btn" class="btn btn-secondary" style="margin-right: 10px;" onclick="PurchaseDemand.syncToInitialStock()">同步到期初库存</button>
            <button id="delete-product-btn" class="btn btn-danger" style="margin-right: 10px;" onclick="PurchaseDemand.deleteProductData()">删除产品数据</button>
            <button id="batch-delete-btn" class="btn btn-danger">批量删除</button>
          </div>
        </div>
      
      <div class="content-area">
                
        <!-- 产品选择标签页 -->
        <div style="padding: 0 20px;">
          <div class="product-tabs-wrapper" id="product-tabs-container">
            <button class="product-tab active" data-product="" onclick="PurchaseDemand.switchProduct('')">
              <div class="product-tab-inner">全部</div>
            </button>
          </div>
        </div>
        
        <div class="filter-section" style="padding: 20px; display: flex; gap: 15px; align-items: center; justify-content: space-between;">
          <div style="display: flex; gap: 15px; align-items: center; flex: 1;">
            <input type="text" id="search-keyword" class="input" placeholder="搜索物料编码、名称或供应商" style="flex: 1; max-width: 400px;" />
            <select id="filter-status" class="input" style="width: 150px;">
              <option value="">全部状态</option>
              <option value="pending">待处理</option>
              <option value="ordered">已下单</option>
              <option value="received">已收货</option>
              <option value="completed">已完成</option>
              <option value="cancelled">已取消</option>
            </select>
            <button class="btn btn-secondary" onclick="PurchaseDemand.search()">搜索</button>
            <button class="btn btn-secondary" onclick="PurchaseDemand.resetSearch()">重置</button>
          </div>
          <button id="batch-edit-status-btn" class="btn btn-secondary" onclick="PurchaseDemand.openBatchEditStatusModal()">批量编辑状态</button>
        </div>
        
        <div class="table-wrapper">
          <table>
            <thead>
                <tr>
                  <th style="width: 40px;"><label class="custom-checkbox"><input type="checkbox" id="select-all" onchange="PurchaseDemand.toggleSelectAll(this)" /><span class="checkmark"></span></label></th>
                  <th>需求编号</th>
                  <th>物料编码</th>
                  <th>物料名称</th>
                  <th>订单数量</th>
                  <th>BOM用量</th>
                  <th>总需求</th>
                  <th>期初库存</th>
                  <th>净需求</th>
                  <th>最小包装</th>
                  <th style="background: var(--success-bg); color: var(--text);">实际采购</th>
                  <th>单位</th>
                  <th>供应商</th>
                  <th>状态</th>
                  <th>操作</th>
                </tr>
              </thead>
              <tbody id="demand-list">
                <tr><td colspan="15" class="text-center">加载中...</td></tr>
              </tbody>
            </table>
          </div>
          
          <div class="pagination" id="pagination" style="padding: 20px; display: flex; justify-content: center; gap: 8px;"></div>
        </div>
      </div>
      
      <!-- 计算采购需求弹窗 -->
      <div id="calc-modal" class="modal" style="display:none;">
        <div class="modal-content" style="max-width: 500px;">
          <div class="modal-header">
            <h2>计算采购需求</h2>
            <button class="modal-close" onclick="PurchaseDemand.closeCalcModal()">&times;</button>
          </div>
          <div class="modal-body">
            <div class="field">
              <label>选择产品 <span style="color: var(--danger);">*</span></label>
              <select id="product-select" class="input">
                <option value="">请选择产品</option>
              </select>
            </div>
            <div class="field">
              <label>订单数量 <span style="color: var(--danger);">*</span></label>
              <input type="number" id="order-qty" class="input" min="1" value="1" placeholder="输入客户订单数量" />
            </div>
            <div class="field">
              <label style="display: flex; align-items: center; cursor: pointer; padding: 12px; background: var(--surface); border-radius: 8px; border: 1px solid var(--border);">
                <input type="checkbox" id="use-initial-stock" checked style="width: 18px; height: 18px; cursor: pointer; margin-right: 10px;" />
                <div>
                  <div style="font-weight: 500; color: var(--text);">使用期初库存菜单中的库存数据</div>
                  <div style="margin-top: 4px; font-size: 12px; color: var(--text-3);">
                    勾选后将使用期初库存管理中的最新库存数据进行计算，否则使用导入时的库存数据
                  </div>
                </div>
              </label>
            </div>
            <div style="margin-top: 16px; padding: 12px; background: var(--surface); border-radius: 8px; border: 1px solid var(--border);">
              <div style="font-size: 14px; color: var(--text-2);">
                <p style="margin: 0 0 8px 0;">📋 计算将：</p>
                <ul style="margin: 0; padding-left: 20px;">
                  <li>根据选中产品的BOM展开所有物料</li>
                  <li>计算每种物料的总需求量</li>
                  <li>扣减期初库存得出净需求</li>
                  <li>按最小包装取整得出实际采购量</li>
                </ul>
              </div>
            </div>
          </div>
          <div class="modal-footer">
            <button class="btn btn-secondary" onclick="PurchaseDemand.closeCalcModal()">取消</button>
            <button class="btn btn-primary" onclick="PurchaseDemand.doCalculate()">开始计算</button>
          </div>
        </div>
      </div>
      
      <!-- 更新状态弹窗 -->
      <div id="status-modal" class="modal" style="display:none;">
        <div class="modal-content" style="max-width: 400px;">
          <div class="modal-header">
            <h2>更新状态</h2>
            <button class="modal-close" onclick="PurchaseDemand.closeStatusModal()">&times;</button>
          </div>
          <div class="modal-body">
            <div class="field">
              <label>状态</label>
              <select id="update-status" class="input">
                <option value="pending">待处理</option>
                <option value="ordered">已下单</option>
                <option value="received">已收货</option>
                <option value="completed">已完成</option>
                <option value="cancelled">已取消</option>
              </select>
            </div>
            <div class="field">
              <label>备注</label>
              <textarea id="update-remark" class="input" rows="3" placeholder="可选填写备注信息"></textarea>
            </div>
          </div>
          <div class="modal-footer">
            <button class="btn btn-secondary" onclick="PurchaseDemand.closeStatusModal()">取消</button>
            <button class="btn btn-primary" onclick="PurchaseDemand.doUpdateStatus()">确定</button>
          </div>
        </div>
      </div>
      
      <!-- Excel导入弹窗 -->
      <div id="import-excel-modal" class="modal" style="display:none;">
        <div class="modal-content" style="max-width: 600px;">
          <div class="modal-header">
            <h2>导入采购需求清单</h2>
            <button class="modal-close" onclick="PurchaseDemand.closeImportModal()">&times;</button>
          </div>
          <div class="modal-body">
            <div class="field">
              <label>产品编码 <span style="color: var(--danger);">*</span></label>
              <input type="text" id="import-product-code" class="input" placeholder="请输入产品编码，如：AP05" />
            </div>
            <div class="field">
              <label>选择Excel文件 <span style="color: var(--danger);">*</span></label>
              <input type="file" id="excel-file" class="input" accept=".xlsx,.xls" />
              <div style="margin-top: 8px; font-size: 12px; color: var(--text-3);">
                支持 .xlsx 和 .xls 格式，文件大小不超过 10MB
              </div>
              <button type="button" class="btn btn-secondary" style="margin-top: 8px;" onclick="testXLSX()">测试XLSX库</button>
            </div>
            
            <div style="margin-top: 16px; padding: 12px; background: var(--surface); border-radius: 8px; border: 1px solid var(--border);">
              <div style="font-size: 14px; color: var(--text-2); margin-bottom: 12px;">
                <strong>Excel文件格式要求：</strong>
              </div>
              <table style="width: 100%; font-size: 13px; border-collapse: collapse;">
                <thead>
                  <tr style="background: var(--surface-2);">
                    <th style="padding: 8px; text-align: left; border: 1px solid var(--border);">列名</th>
                    <th style="padding: 8px; text-align: left; border: 1px solid var(--border);">说明</th>
                    <th style="padding: 8px; text-align: left; border: 1px solid var(--border);">必填</th>
                  </tr>
                </thead>
                <tbody>
                  <tr>
                    <td style="padding: 6px; border: 1px solid var(--border); font-family: monospace;">型号</td>
                    <td style="padding: 6px; border: 1px solid var(--border;">物料编码/型号</td>
                    <td style="padding: 6px; border: 1px solid var(--border); text-align: center;">✓</td>
                  </tr>
                  <tr>
                    <td style="padding: 6px; border: 1px solid var(--border); font-family: monospace;">供应商</td>
                    <td style="padding: 6px; border: 1px solid var(--border;">供应商名称</td>
                    <td style="padding: 6px; border: 1px solid var(--border); text-align: center;">✓</td>
                  </tr>
                  <tr>
                    <td style="padding: 6px; border: 1px solid var(--border); font-family: monospace;">期初库存</td>
                    <td style="padding: 6px; border: 1px solid var(--border;">当前库存数量</td>
                    <td style="padding: 6px; border: 1px solid var(--border); text-align: center;">✓</td>
                  </tr>
                  <tr>
                    <td style="padding: 6px; border: 1px solid var(--border); font-family: monospace;">MOQ</td>
                    <td style="padding: 6px; border: 1px solid var(--border;">最小订购量</td>
                    <td style="padding: 6px; border: 1px solid var(--border); text-align: center;">✓</td>
                  </tr>
                  <tr>
                    <td style="padding: 6px; border: 1px solid var(--border); font-family: monospace;">单机数量</td>
                    <td style="padding: 6px; border: 1px solid var(--border;">BOM单机用量</td>
                    <td style="padding: 6px; border: 1px solid var(--border); text-align: center;">✓</td>
                  </tr>
                </tbody>
              </table>
            </div>
            
            <div id="import-preview" style="margin-top: 16px; display: none;">
              <div style="font-size: 14px; font-weight: 600; margin-bottom: 8px;">预览数据（前5条）：</div>
              <div class="table-container" style="max-height: 200px;">
                <table class="data-table" id="preview-table">
                  <thead>
                    <tr>
                      <th>型号</th>
                      <th>供应商</th>
                      <th>期初库存</th>
                      <th>MOQ</th>
                      <th>单机数量</th>
                    </tr>
                  </thead>
                  <tbody id="preview-tbody">
                  </tbody>
                </table>
              </div>
            </div>
          </div>
          <div class="modal-footer">
            <button class="btn btn-secondary" onclick="PurchaseDemand.closeImportModal()">取消</button>
            <button class="btn btn-primary" onclick="PurchaseDemand.importExcel()">导入</button>
          </div>
        </div>
      </div>
      
      <!-- 编辑采购需求弹窗 -->
      <div id="edit-modal" class="modal" style="display:none;">
        <div class="modal-content" style="max-width: 600px;">
          <div class="modal-header">
            <h2>编辑采购需求</h2>
            <button class="modal-close" onclick="PurchaseDemand.closeEditModal()">&times;</button>
          </div>
          <div class="modal-body">
            <div class="field">
              <label>物料编码</label>
              <input type="text" id="edit-material-code" class="input" readonly />
            </div>
            <div class="field">
              <label>物料名称</label>
              <input type="text" id="edit-material-name" class="input" readonly />
            </div>
            <div class="field">
              <label>订单数量</label>
              <input type="number" id="edit-order-qty" class="input" min="0" />
            </div>
            <div class="field">
              <label>单机用量</label>
              <input type="number" id="edit-bom-unit-qty" class="input" min="0" step="0.01" />
            </div>
            <div class="field">
              <label>期初库存</label>
              <input type="number" id="edit-initial-stock" class="input" min="0" />
            </div>
            <div class="field">
              <label>最小包装</label>
              <input type="number" id="edit-min-package" class="input" min="1" />
            </div>
            <div class="field">
              <label>实际采购数量</label>
              <input type="number" id="edit-actual-purchase-qty" class="input" min="0" />
            </div>
            <div class="field">
              <label>单位</label>
              <input type="text" id="edit-unit" class="input" />
            </div>
            <div class="field">
              <label>供应商</label>
              <input type="text" id="edit-supplier" class="input" />
            </div>
            <div class="field">
              <label>状态</label>
              <select id="edit-status" class="input">
                <option value="pending">待处理</option>
                <option value="ordered">已下单</option>
                <option value="received">已收货</option>
                <option value="completed">已完成</option>
                <option value="cancelled">已取消</option>
              </select>
            </div>
            <div class="field">
              <label>备注</label>
              <textarea id="edit-remark" class="input" rows="3"></textarea>
            </div>
          </div>
          <div class="modal-footer">
            <button class="btn btn-secondary" onclick="PurchaseDemand.closeEditModal()">取消</button>
            <button class="btn btn-primary" onclick="PurchaseDemand.saveEdit()">保存</button>
          </div>
        </div>
      </div>
      
      <!-- 批量编辑状态弹窗 -->
      <div id="batch-edit-status-modal" class="modal" style="display:none;">
        <div class="modal-content" style="max-width: 500px;">
          <div class="modal-header">
            <h2>批量编辑状态</h2>
            <button class="modal-close" onclick="PurchaseDemand.closeBatchEditStatusModal()">&times;</button>
          </div>
          <div class="modal-body">
            <div class="field">
              <label>选择状态</label>
              <select id="batch-status" class="input">
                <option value="">请选择状态</option>
                <option value="pending">待处理</option>
                <option value="ordered">已下单</option>
                <option value="received">已收货</option>
                <option value="completed">已完成</option>
                <option value="cancelled">已取消</option>
              </select>
            </div>
            <div class="field">
              <label>应用范围</label>
              <div style="display: flex; gap: 20px; margin-top: 8px;">
                <label for="batch-scope-selected" style="display: flex; align-items: center; cursor: pointer;">
                  <input type="radio" id="batch-scope-selected" name="batch-scope" value="selected" checked style="margin-right: 8px;">
                  仅当前选中的记录
                </label>
                <label for="batch-scope-all" style="display: flex; align-items: center; cursor: pointer;">
                  <input type="radio" id="batch-scope-all" name="batch-scope" value="all" style="margin-right: 8px;">
                  指定产品的所有记录
                </label>
              </div>
              <div id="batch-product-select-container" style="margin-top: 12px; display: none;">
                <label style="font-size: 14px; margin-bottom: 4px; display: block;">选择产品</label>
                <select id="batch-product-select" class="input" style="width: 100%;">
                  <option value="">请选择产品</option>
                </select>
              </div>
            </div>
            <div class="field">
              <label>备注（可选）</label>
              <textarea id="batch-remark" class="input" rows="3" placeholder="可以为所有选中的项目添加统一的备注"></textarea>
            </div>
            <div style="margin-top: 16px; padding: 12px; background: var(--surface); border-radius: 8px;">
              <div style="font-size: 14px; color: var(--text-2);">
                <p style="margin: 0;">已选择 <span id="selected-count" style="font-weight: bold; color: var(--primary);">0</span> 条记录</p>
              </div>
            </div>
          </div>
          <div class="modal-footer">
            <button class="btn btn-secondary" onclick="PurchaseDemand.closeBatchEditStatusModal()">取消</button>
            <button class="btn btn-primary" onclick="PurchaseDemand.saveBatchEditStatus()">保存</button>
          </div>
        </div>
      </div>
    `;
    
    setTimeout(() => {
      document.getElementById('calc-demand-btn')?.addEventListener('click', () => openCalcModal());
      document.getElementById('import-excel-btn')?.addEventListener('click', () => openImportModal());
      document.getElementById('batch-delete-btn')?.addEventListener('click', () => batchDelete());
      document.getElementById('search-keyword')?.addEventListener('keypress', (e) => {
        if (e.key === 'Enter') PurchaseDemand.search();
      });
      document.getElementById('excel-file')?.addEventListener('change', handleFileSelect);
      loadList();
      loadProducts();
    }, 0);
    
    return html;
  });

  async function loadList() {
    try {
      const res = await API.get('/api/purchase-demand');
      demandList = res.list || [];
      console.log('加载采购需求列表:', demandList.length, '条'); // 调试日志
      console.log('前3条数据:', demandList.slice(0, 3)); // 调试日志
      console.log('完整数据结构:', demandList[0]); // 查看第一条数据的完整结构
      console.log('数据中的所有字段:', Object.keys(demandList[0] || {})); // 查看所有字段名
      console.log('第一条数据的product_code:', demandList[0]?.product_code); // 直接查看第一条的product_code
      console.log('第二条数据的product_code:', demandList[1]?.product_code); // 直接查看第二条的product_code
      
      // 更新产品标签
      updateProductTabs();
      
      renderList();
    } catch (e) {
      console.error('加载采购需求失败:', e);
      document.getElementById('demand-list').innerHTML = '<tr><td colspan="15" class="text-center" style="color: var(--danger);">加载失败</td></tr>';
    }
  }
  
  function updateProductTabs() {
    // 提取所有产品编码
    const products = new Set();
    demandList.forEach((item, index) => {
      // 优先使用 product_code 字段，如果没有则从 demand_no 中提取
      let productCode = item.product_code;
      console.log(`第${index + 1}条数据的product_code:`, productCode); // 调试每条数据
      
      if (productCode) {
        products.add(productCode);
      }
    });
    
    console.log('提取到的产品编码:', Array.from(products)); // 调试日志
    console.log('检查数据是否有product_code字段:', demandList.some(item => 'product_code' in item)); // 检查字段是否存在
    
    // 更新标签页
    const tabsContainer = document.getElementById('product-tabs-container');
    if (!tabsContainer) return;
    
    const productArray = Array.from(products).sort();
    
    let html = `<button class="product-tab ${!currentProduct ? 'active' : ''}" data-product="" onclick="PurchaseDemand.switchProduct('')">
      <div class="product-tab-inner">全部</div>
    </button>`;
    
    productArray.forEach(product => {
      const isActive = product === currentProduct ? 'active' : '';
      html += `<button class="product-tab ${isActive}" data-product="${product}" onclick="PurchaseDemand.switchProduct('${product}')">
        <div class="product-tab-inner">${product}</div>
      </button>`;
    });
    
    tabsContainer.innerHTML = html;
  }
  
  function switchProduct(productCode) {
    currentProduct = productCode;  // 保存当前选中的产品
    window.PurchaseDemand.currentProduct = productCode;  // 也在全局对象中保存
    
    // 更新标签样式
    document.querySelectorAll('.product-tab').forEach(tab => {
      if (tab.dataset.product === productCode) {
        tab.classList.add('active');
      } else {
        tab.classList.remove('active');
      }
    });
    
    renderList();
  }

  async function loadProducts() {
    try {
      // 从采购需求表中获取产品列表
      const res = await API.get('/api/purchase-demand');
      const demandData = res.list || [];
      
      // 提取唯一的产品编码
      const products = {};
      demandData.forEach(item => {
        if (item.product_code) {
          products[item.product_code] = item.product_code;
        }
      });
      
      productList = Object.keys(products).map(code => ({
        product_code: code,
        product_name: code // 使用产品编码作为名称
      }));
      
      console.log('从采购需求表加载到的产品列表:', productList); // 调试日志
      
      const select = document.getElementById('product-select');
      if (select) {
        select.innerHTML = '<option value="">请选择产品</option>' + 
          productList.map(p => `<option value="${escapeHtml(p.product_code)}">${escapeHtml(p.product_code)}</option>`).join('');
      }
    } catch (e) {
      console.error('加载产品列表失败:', e);
    }
  }

  let currentProduct = ''; // 当前选中的产品
  
  function toggleSelectAll(source) {
    const checkboxes = document.querySelectorAll('.row-checkbox');
    checkboxes.forEach(checkbox => {
      checkbox.checked = source.checked;
    });
  }

  function renderList() {
    const tbody = document.getElementById('demand-list');
    const keyword = (document.getElementById('search-keyword')?.value || '').toLowerCase();
    const filterStatus = document.getElementById('filter-status')?.value || '';
    
    // 按产品分组
    let grouped = {};
    demandList.forEach(item => {
      const productCode = item.product_code || '';
      
      if (!grouped[productCode]) {
        grouped[productCode] = [];
      }
      grouped[productCode].push(item);
    });
    
    // 如果选择了特定产品，只显示该产品的数据
    if (currentProduct) {
      grouped = currentProduct in grouped ? { [currentProduct]: grouped[currentProduct] } : {};
    }
    
    // 合并所有数据用于搜索和过滤
    let allData = [];
    Object.values(grouped).forEach(items => {
      allData = allData.concat(items);
    });
    
    // 应用搜索过滤
    if (keyword) {
      allData = allData.filter(item => 
        (item.demand_no || '').toLowerCase().includes(keyword) ||
        (item.material_code || '').toLowerCase().includes(keyword) ||
        (item.material_name || '').toLowerCase().includes(keyword)
      );
    }
    if (filterStatus) {
      allData = allData.filter(item => item.status === filterStatus);
    }
    
    // 分页
    const totalPages = Math.ceil(allData.length / pageSize);
    const start = (currentPage - 1) * pageSize;
    const pageData = allData.slice(start, start + pageSize);
    
    if (pageData.length === 0) {
      tbody.innerHTML = '<tr><td colspan="15" class="text-center">暂无数据</td></tr>';
    } else {
      // 按产品分组渲染
      let html = '';
      let currentGroup = null;
      
      // 计算每个产品的总采购数量（跨所有页面）
      const productTotals = {};
      allData.forEach(item => {
        if (item.product_code) {
          productTotals[item.product_code] = (productTotals[item.product_code] || 0) + (item.actual_purchase_qty || 0);
        }
      });
      
      pageData.forEach(item => {
        if (item.product_code !== currentGroup) {
          currentGroup = item.product_code;
          // 只在有产品编码时才添加分组标题
          if (currentGroup) {
            const productTotal = productTotals[currentGroup] || 0;
            html += `<tr style="background: var(--surface-2);">
              <td colspan="10" style="font-weight: bold; padding: 12px 16px; color: var(--text);">
                产品: ${currentGroup}
              </td>
              <td colspan="5" style="font-weight: bold; padding: 12px 16px; color: var(--primary); text-align: right;">
                总采购数量: ${productTotal}
              </td>
            </tr>`;
          }
        }
        
        const status = statusMap[item.status] || { text: item.status, color: 'var(--text-2)' };
        html += `
          <tr>
            <td><label class="custom-checkbox"><input type="checkbox" class="row-checkbox" data-id="${item.id}" /><span class="checkmark"></span></label></td>
            <td><span style="font-family: monospace; font-size: 12px;">${escapeHtml(item.demand_no || '')}</span></td>
            <td>${escapeHtml(item.material_code || '')}</td>
            <td>${escapeHtml(item.material_name || '')}</td>
            <td>${item.order_qty || 0}</td>
            <td>${item.bom_unit_qty || 1}</td>
            <td>${item.total_demand || 0}</td>
            <td style="color: var(--info);">${item.initial_stock || 0}</td>
            <td style="color: ${item.net_demand > 0 ? 'var(--warning)' : 'var(--success)'};">${item.net_demand || 0}</td>
            <td>${item.min_package || 1}</td>
            <td style="font-weight: 700; color: var(--text); background: var(--success-bg);">${item.actual_purchase_qty || 0}</td>
            <td>${escapeHtml(item.unit || 'pcs')}</td>
            <td>${escapeHtml(item.supplier || '-')}</td>
            <td><span style="padding: 2px 8px; border-radius: 4px; background: ${status.color}20; color: ${status.color}; font-size: 12px;">${status.text}</span></td>
            <td>
              <button class="btn btn-sm btn-secondary" onclick="PurchaseDemand.edit(${item.id})">编辑</button>
              <button class="btn btn-sm btn-danger" onclick="PurchaseDemand.delete(${item.id})">删除</button>
            </td>
          </tr>
        `;
      });
      
      tbody.innerHTML = html;
    }
    
    renderPagination(totalPages);
  }

  function renderPagination(totalPages) {
    const container = document.getElementById('pagination');
    if (totalPages <= 1) {
      container.innerHTML = '';
      return;
    }
    
    let html = '';
    html += `<button class="btn btn-sm btn-secondary" ${currentPage <= 1 ? 'disabled' : ''} onclick="PurchaseDemand.goPage(${currentPage - 1})">上一页</button>`;
    html += `<span style="padding: 0 12px; line-height: 32px;">第 ${currentPage} / ${totalPages} 页</span>`;
    html += `<button class="btn btn-sm btn-secondary" ${currentPage >= totalPages ? 'disabled' : ''} onclick="PurchaseDemand.goPage(${currentPage + 1})">下一页</button>`;
    container.innerHTML = html;
  }

  function openCalcModal() {
    document.getElementById('product-select').value = '';
    document.getElementById('order-qty').value = 1;
    document.getElementById('calc-modal').style.display = 'flex';
    // 重新加载产品列表
    loadProducts();
  }

  function closeCalcModal() {
    document.getElementById('calc-modal').style.display = 'none';
  }

  async function doCalculate() {
    const productCode = document.getElementById('product-select').value;
    const orderQty = parseInt(document.getElementById('order-qty').value) || 0;
    const useInitialStock = document.getElementById('use-initial-stock').checked;
    
    if (!productCode) {
      alert('请选择产品');
      return;
    }
    if (orderQty <= 0) {
      alert('订单数量必须大于0');
      return;
    }
    
    try {
      // 基于现有采购需求重新计算
      const res = await API.post('/api/purchase-demand/recalculate', {
        product_code: productCode,
        order_qty: orderQty,
        use_initial_stock: useInitialStock
      });
      
      closeCalcModal();
      alert(res.message || '计算完成');
      loadList();
      
      // 显示计算结果摘要
      if (res.list && res.list.length > 0) {
        const totalPurchase = res.list.reduce((sum, item) => sum + (item.actual_purchase_qty || 0), 0);
        console.log(`采购需求重新计算完成，需求编号: ${res.demand_no}，共 ${res.list.length} 种物料，总采购数量: ${totalPurchase}`);
      }
    } catch (e) {
      alert(e.message || '计算失败');
    }
  }

  async function calcFromOrders() {
    if (!confirm('将根据所有客户订单自动计算采购需求，确定继续吗？')) {
      return;
    }
    
    try {
      const res = await API.post('/api/purchase-demand/calculate-from-orders', {});
      alert(res.message || '计算完成');
      loadList();
    } catch (e) {
      alert(e.message || '计算失败');
    }
  }

  let updatingId = null;
  
  function updateStatus(id) {
    updatingId = id;
    const item = demandList.find(x => x.id === id);
    document.getElementById('update-status').value = item?.status || 'pending';
    document.getElementById('update-remark').value = item?.remark || '';
    document.getElementById('status-modal').style.display = 'flex';
  }

  function closeStatusModal() {
    document.getElementById('status-modal').style.display = 'none';
    updatingId = null;
  }

  async function doUpdateStatus() {
    if (!updatingId) return;
    
    const status = document.getElementById('update-status').value;
    const remark = document.getElementById('update-remark').value.trim();
    
    try {
      await API.put(`/api/purchase-demand/${updatingId}`, { status, remark });
      closeStatusModal();
      alert('更新成功');
      loadList();
    } catch (e) {
      alert(e.message || '更新失败');
    }
  }

  async function deleteDemand(id) {
    if (!confirm('确定要删除这条采购需求吗？')) return;
    try {
      await API.delete(`/api/purchase-demand/${id}`);
      alert('删除成功');
      loadList();
    } catch (e) {
      alert(e.message || '删除失败');
    }
  }

  async function batchDelete() {
    const checked = document.querySelectorAll('.row-checkbox:checked');
    if (checked.length === 0) {
      alert('请先选择要删除的项');
      return;
    }
    if (!confirm(`确定要删除选中的 ${checked.length} 条采购需求吗？`)) return;
    
    const ids = Array.from(checked).map(cb => parseInt(cb.dataset.id));
    try {
      await API.post('/api/purchase-demand/batch-delete', { ids });
      alert('批量删除成功');
      loadList();
    } catch (e) {
      alert(e.message || '批量删除失败');
    }
  }

  function toggleSelectAll(checkbox) {
    document.querySelectorAll('.row-checkbox').forEach(cb => cb.checked = checkbox.checked);
  }

  function search() {
    currentPage = 1;
    renderList();
  }

  function resetSearch() {
    document.getElementById('search-keyword').value = '';
    document.getElementById('filter-status').value = '';
    currentPage = 1;
    renderList();
  }

  function goPage(page) {
    currentPage = page;
    renderList();
  }

  function escapeHtml(str) {
    if (!str) return '';
    return String(str).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
  }

  // Excel导入相关函数
  let excelData = [];

  function openImportModal() {
    document.getElementById('excel-file').value = '';
    document.getElementById('import-preview').style.display = 'none';
    document.getElementById('import-excel-modal').style.display = 'flex';
  }

  function closeImportModal() {
    document.getElementById('import-excel-modal').style.display = 'none';
    excelData = [];
  }

  // 测试XLSX库
  window.testXLSX = function() {
    console.log('测试XLSX库...');
    console.log('typeof XLSX:', typeof XLSX);
    if (typeof XLSX !== 'undefined') {
      console.log('XLSX版本:', XLSX.version);
      API.toast('XLSX库已加载，版本: ' + XLSX.version);
    } else {
      console.error('XLSX库未加载');
      // 尝试动态加载
      loadXLSXLibrary();
    }
  };

  // 动态加载XLSX库
  function loadXLSXLibrary() {
    if (typeof XLSX !== 'undefined') {
      return Promise.resolve();
    }
    
    return new Promise((resolve, reject) => {
      const script = document.createElement('script');
      script.src = './assets/xlsx.min.js';
      script.onload = () => {
        console.log('XLSX库动态加载成功，版本:', XLSX.version);
        API.toast('XLSX库加载成功');
        resolve();
      };
      script.onerror = () => {
        console.error('XLSX库加载失败');
        API.toast('XLSX库加载失败，请刷新页面重试', 'error');
        reject(new Error('Failed to load XLSX library'));
      };
      document.head.appendChild(script);
    });
  }

  // 确保XLSX库已加载
  async function ensureXLSXLoaded() {
    if (typeof XLSX === 'undefined') {
      try {
        await loadXLSXLibrary();
      } catch (err) {
        throw err;
      }
    }
  }

  async function handleFileSelect(e) {
    const file = e.target.files[0];
    if (!file) return;

    try {
      // 确保XLSX库已加载
      await ensureXLSXLoaded();
      
      // 检查文件大小
      if (file.size > 10 * 1024 * 1024) {
        API.toast('文件大小不能超过10MB', 'error');
        e.target.value = '';
        return;
      }

      // 检查文件类型
      const fileName = file.name.toLowerCase();
      if (!fileName.endsWith('.xlsx') && !fileName.endsWith('.xls')) {
        API.toast('请选择Excel文件（.xlsx或.xls格式）', 'error');
        e.target.value = '';
        return;
      }

      // 读取Excel文件
      const reader = new FileReader();
      reader.onload = async function(e) {
        try {
          const data = new Uint8Array(e.target.result);
          const workbook = XLSX.read(data, { type: 'array' });
          const firstSheet = workbook.Sheets[workbook.SheetNames[0]];
          const jsonData = XLSX.utils.sheet_to_json(firstSheet, { header: 1 });
          
          console.log('Excel解析结果:', jsonData); // 调试日志
          
          // 验证数据格式
          if (jsonData.length < 2) {
            API.toast('Excel文件没有数据', 'error');
            return;
          }

          // 获取表头
          const headers = jsonData[0];
          console.log('表头:', headers); // 调试日志
          
          const requiredHeaders = ['型号', '供应商', '期初库存', 'MOQ', '单机数量'];
          const missingHeaders = requiredHeaders.filter(h => !headers.includes(h));
          
          if (missingHeaders.length > 0) {
            API.toast(`缺少必要的列：${missingHeaders.join(', ')}。当前列：${headers.join(', ')}`, 'error');
            return;
          }

          // 解析数据
          excelData = [];
          let emptyRows = 0;
          let validRows = 0;
          
          for (let i = 1; i < jsonData.length; i++) {
            const row = jsonData[i];
            if (!row) {
              emptyRows++;
              continue;
            }

            // 获取各列的值
            const model = String(row[headers.indexOf('型号')] || '').trim();
            const supplier = String(row[headers.indexOf('供应商')] || '').trim();
            const initial_stock = row[headers.indexOf('期初库存')] || 0;
            const moq = row[headers.indexOf('MOQ')] || 1;
            const per_unit_qty = row[headers.indexOf('单机数量')] || 1;

            // 跳过完全空白的行
            if (!model && !supplier) {
              emptyRows++;
              continue;
            }

            const item = {
              model: model,
              supplier: supplier,
              initial_stock: parseInt(initial_stock) || 0,
              moq: parseInt(moq) || 1,
              per_unit_qty: parseInt(per_unit_qty) || 1
            };

            console.log(`第${i}行数据:`, item); // 调试日志
            excelData.push(item);
            validRows++;
          }
          
          console.log(`总共处理 ${jsonData.length - 1} 行，有效数据 ${validRows} 条，空行 ${emptyRows} 条`);

          if (excelData.length === 0) {
            API.toast('Excel文件没有有效数据', 'error');
            return;
          }

          // 显示预览
          showPreview(excelData.slice(0, 5));
          API.toast(`成功读取 ${excelData.length} 条数据`, 'success');

        } catch (err) {
          console.error('解析Excel失败:', err);
          API.toast(`解析Excel文件失败：${err.message || '请检查文件格式'}`, 'error');
        }
      };
      reader.readAsArrayBuffer(file);
    } catch (err) {
      console.error('读取文件失败:', err);
      API.toast('读取文件失败', 'error');
    }
  }

  function showPreview(data) {
    const tbody = document.getElementById('preview-tbody');
    tbody.innerHTML = data.map(item => `
      <tr>
        <td>${escapeHtml(item.model)}</td>
        <td>${escapeHtml(item.supplier)}</td>
        <td>${item.initial_stock}</td>
        <td>${item.moq}</td>
        <td>${item.per_unit_qty}</td>
      </tr>
    `).join('');
    
    document.getElementById('import-preview').style.display = 'block';
  }

  async function edit(id) {
    try {
      const res = await API.get(`/api/purchase-demand/${id}`);
      const item = res;
      
      if (!item) {
        alert('未找到该采购需求');
        return;
      }
      
      // 填充表单
      document.getElementById('edit-material-code').value = item.material_code || '';
      document.getElementById('edit-material-name').value = item.material_name || '';
      document.getElementById('edit-order-qty').value = item.order_qty || 0;
      document.getElementById('edit-bom-unit-qty').value = item.bom_unit_qty || 0;
      document.getElementById('edit-initial-stock').value = item.initial_stock || 0;
      document.getElementById('edit-min-package').value = item.min_package || 1;
      document.getElementById('edit-actual-purchase-qty').value = item.actual_purchase_qty || 0;
      document.getElementById('edit-unit').value = item.unit || 'pcs';
      document.getElementById('edit-supplier').value = item.supplier || '';
      document.getElementById('edit-status').value = item.status || 'pending';
      document.getElementById('edit-remark').value = item.remark || '';
      
      // 保存当前编辑的ID
      window.PurchaseDemand.editingId = id;
      
      // 显示弹窗
      document.getElementById('edit-modal').style.display = 'flex';
    } catch (e) {
      console.error('获取数据失败:', e);
      alert('获取数据失败');
    }
  }
  
  function closeEditModal() {
    document.getElementById('edit-modal').style.display = 'none';
    window.PurchaseDemand.editingId = null;
  }
  
  async function saveEdit() {
    const id = window.PurchaseDemand.editingId;
    if (!id) {
      alert('无效的编辑ID');
      return;
    }
    
    // 获取表单数据
    const data = {
      order_qty: parseInt(document.getElementById('edit-order-qty').value) || 0,
      bom_unit_qty: parseFloat(document.getElementById('edit-bom-unit-qty').value) || 0,
      initial_stock: parseInt(document.getElementById('edit-initial-stock').value) || 0,
      min_package: parseInt(document.getElementById('edit-min-package').value) || 1,
      actual_purchase_qty: parseInt(document.getElementById('edit-actual-purchase-qty').value) || 0,
      unit: document.getElementById('edit-unit').value.trim() || 'pcs',
      supplier: document.getElementById('edit-supplier').value.trim(),
      status: document.getElementById('edit-status').value,
      remark: document.getElementById('edit-remark').value.trim()
    };
    
    try {
      const res = await API.put(`/api/purchase-demand/${id}`, data);
      if (res.ok) {
        alert('保存成功');
        closeEditModal();
        loadList();
      } else {
        alert(res.error || '保存失败');
      }
    } catch (e) {
      console.error('保存失败:', e);
      alert('保存失败');
    }
  }

  function openBatchEditStatusModal() {
    // 获取选中的复选框
    const checkboxes = document.querySelectorAll('.row-checkbox:checked');
    const selectedCount = checkboxes.length;
    
    // 更新选中数量显示
    document.getElementById('selected-count').textContent = selectedCount;
    
    // 加载产品列表
    loadProductOptions();
    
    // 重置表单
    document.getElementById('batch-status').value = '';
    document.getElementById('batch-remark').value = '';
    document.querySelector('input[name="batch-scope"][value="selected"]').checked = true;
    document.getElementById('batch-product-select-container').style.display = 'none';
    
    // 添加事件监听
    document.getElementById('batch-scope-all').onchange = function() {
      document.getElementById('batch-product-select-container').style.display = 
        this.checked ? 'block' : 'none';
    };
    document.getElementById('batch-scope-selected').onchange = function() {
      document.getElementById('batch-product-select-container').style.display = 
        this.checked ? 'none' : 'block';
    };
    
    // 显示弹窗
    document.getElementById('batch-edit-status-modal').style.display = 'flex';
  }
  
  function loadProductOptions() {
    // 获取所有产品
    const products = new Set();
    demandList.forEach(item => {
      if (item.product_code) {
        products.add(item.product_code);
      }
    });
    
    const productSelect = document.getElementById('batch-product-select');
    productSelect.innerHTML = '<option value="">请选择产品</option>';
    
    // 添加产品选项
    Array.from(products).sort().forEach(product => {
      const option = document.createElement('option');
      option.value = product;
      option.textContent = product;
      productSelect.appendChild(option);
    });
    
    // 如果当前有选中的产品，设为默认值
    if (currentProduct) {
      productSelect.value = currentProduct;
    }
  }
  
  function closeBatchEditStatusModal() {
    document.getElementById('batch-edit-status-modal').style.display = 'none';
  }
  
  async function saveBatchEditStatus() {
    const status = document.getElementById('batch-status').value;
    const remark = document.getElementById('batch-remark').value.trim();
    const scope = document.querySelector('input[name="batch-scope"]:checked').value;
    
    if (!status) {
      alert('请选择状态');
      return;
    }
    
    let requestData = {
      status: status,
      remark: remark
    };
    
    let confirmMessage = '';
    
    if (scope === 'all') {
      // 更新指定产品的所有记录
      const selectedProduct = document.getElementById('batch-product-select').value;
      if (!selectedProduct) {
        alert('请选择要更新的产品');
        return;
      }
      requestData.product_code = selectedProduct;
      confirmMessage = `确定要将"${selectedProduct}"的所有记录状态更新为"${getStatusText(status)}"吗？`;
    } else {
      // 仅更新选中的记录
      const checkboxes = document.querySelectorAll('.row-checkbox:checked');
      const ids = Array.from(checkboxes).map(cb => parseInt(cb.dataset.id));
      
      if (ids.length === 0) {
        alert('请选择要更新的记录');
        return;
      }
      
      requestData.ids = ids;
      confirmMessage = `确定要将选中的 ${ids.length} 条记录状态更新为"${getStatusText(status)}"吗？`;
    }
    
    if (!confirm(confirmMessage)) {
      return;
    }
    
    try {
      const res = await API.post('/api/purchase-demand/batch-update-status', requestData);
      
      if (res.ok) {
        alert(`成功更新 ${res.count} 条记录`);
        closeBatchEditStatusModal();
        loadList();
        // 清除选择
        document.getElementById('select-all').checked = false;
      } else {
        alert(res.error || '更新失败');
      }
    } catch (e) {
      console.error('批量更新失败:', e);
      alert('更新失败');
    }
  }

  function getStatusText(status) {
    const statusMap = {
      'pending': '待处理',
      'ordered': '已下单',
      'received': '已收货',
      'completed': '已完成',
      'cancelled': '已取消'
    };
    return statusMap[status] || status;
  }

  async function syncToInitialStock() {
    try {
      // 获取当前显示的数据
      const res = await API.get('/api/purchase-demand');
      let dataToSync = res.list || [];
      
      // 应用当前的筛选条件
      const keyword = document.getElementById('search-keyword').value.trim();
      const statusFilter = document.getElementById('filter-status').value;
      const currentProduct = window.PurchaseDemand.currentProduct || '';
      
      if (currentProduct) {
        dataToSync = dataToSync.filter(item => item.product_code === currentProduct);
      }
      
      if (statusFilter) {
        dataToSync = dataToSync.filter(item => item.status === statusFilter);
      }
      
      if (keyword) {
        const lowerKeyword = keyword.toLowerCase();
        dataToSync = dataToSync.filter(item => 
          (item.material_code && item.material_code.toLowerCase().includes(lowerKeyword)) ||
          (item.material_name && item.material_name.toLowerCase().includes(lowerKeyword)) ||
          (item.supplier && item.supplier.toLowerCase().includes(lowerKeyword))
        );
      }
      
      if (dataToSync.length === 0) {
        alert('没有数据可同步');
        return;
      }
      
      // 提取唯一物料
      const uniqueMaterials = {};
      dataToSync.forEach(item => {
        const key = item.material_code;
        if (!uniqueMaterials[key] || item.initial_stock > uniqueMaterials[key].initial_stock) {
          uniqueMaterials[key] = {
            material_code: item.material_code,
            material_name: item.material_name,
            stock_qty: item.initial_stock,
            unit: item.unit || 'pcs',
            min_package: item.min_package || 1,
            supplier: item.supplier || ''
          };
        }
      });
      
      const materialsToSync = Object.values(uniqueMaterials);
      
      if (!confirm(`确定要将 ${materialsToSync.length} 个物料的期初库存同步到期初库存管理吗？\n注意：如果物料已存在，将更新其库存数量。`)) {
        return;
      }
      
      const res2 = await API.post('/api/purchase-demand/sync-to-initial-stock', {
        materials: materialsToSync
      });
      
      if (res2.ok) {
        alert(`成功同步 ${res2.success_count} 个物料的期初库存`);
      } else {
        alert(res2.error || '同步失败');
      }
    } catch (e) {
      console.error('同步失败:', e);
      alert('同步失败');
    }
  }

  async function deleteProductData() {
    const currentProduct = window.PurchaseDemand.currentProduct || '';
    if (!currentProduct) {
      alert('请先选择一个产品');
      return;
    }
    
    if (!confirm(`确定要删除产品 ${currentProduct} 的所有采购需求数据吗？\n此操作不可恢复！`)) {
      return;
    }
    
    try {
      const res = await API.post('/api/purchase-demand/delete-product', {
        product_code: currentProduct
      });
      
      if (res.ok) {
        alert(`成功删除产品 ${currentProduct} 的 ${res.count} 条数据`);
        window.PurchaseDemand.currentProduct = '';
        loadList();
      } else {
        alert(res.error || '删除失败');
      }
    } catch (e) {
      alert('删除失败：' + e.message);
    }
  }

  async function exportExcel() {
    try {
      // 获取当前显示的数据（包括筛选条件）
      const res = await API.get('/api/purchase-demand');
      let dataToExport = res.list || [];
      
      // 应用当前的筛选条件
      const keyword = document.getElementById('search-keyword').value.trim();
      const statusFilter = document.getElementById('filter-status').value;
      const currentProduct = window.PurchaseDemand.currentProduct || '';
      
      if (currentProduct) {
        dataToExport = dataToExport.filter(item => item.product_code === currentProduct);
      }
      
      if (statusFilter) {
        dataToExport = dataToExport.filter(item => item.status === statusFilter);
      }
      
      if (keyword) {
        const lowerKeyword = keyword.toLowerCase();
        dataToExport = dataToExport.filter(item => 
          (item.material_code && item.material_code.toLowerCase().includes(lowerKeyword)) ||
          (item.material_name && item.material_name.toLowerCase().includes(lowerKeyword)) ||
          (item.supplier && item.supplier.toLowerCase().includes(lowerKeyword))
        );
      }
      
      if (dataToExport.length === 0) {
        alert('没有数据可导出');
        return;
      }
      
      // 确保XLSX库已加载
      await ensureXLSXLoaded();
      
      // 准备导出数据
      const exportData = dataToExport.map(item => ({
        '需求编号': item.demand_no || '',
        '产品编码': item.product_code || '',
        '物料编码': item.material_code || '',
        '物料名称': item.material_name || '',
        '订单数量': item.order_qty || 0,
        '单机用量': item.bom_unit_qty || 0,
        '总需求': item.total_demand || 0,
        '期初库存': item.initial_stock || 0,
        '净需求': item.net_demand || 0,
        '最小包装': item.min_package || 1,
        '实际采购数量': item.actual_purchase_qty || 0,
        '单位': item.unit || 'pcs',
        '供应商': item.supplier || '',
        '状态': getStatusText(item.status),
        '备注': item.remark || '',
        '创建时间': item.created_at || '',
        '创建人': item.created_by || ''
      }));
      
      // 创建工作簿
      const ws = XLSX.utils.json_to_sheet(exportData);
      const wb = XLSX.utils.book_new();
      XLSX.utils.book_append_sheet(wb, ws, "采购需求清单");
      
      // 设置列宽
      const colWidths = [
        { wch: 20 }, // 需求编号
        { wch: 12 }, // 产品编码
        { wch: 20 }, // 物料编码
        { wch: 30 }, // 物料名称
        { wch: 10 }, // 订单数量
        { wch: 10 }, // 单机用量
        { wch: 10 }, // 总需求
        { wch: 10 }, // 期初库存
        { wch: 10 }, // 净需求
        { wch: 10 }, // 最小包装
        { wch: 15 }, // 实际采购数量
        { wch: 8 },  // 单位
        { wch: 20 }, // 供应商
        { wch: 10 }, // 状态
        { wch: 20 }, // 备注
        { wch: 20 }, // 创建时间
        { wch: 10 }  // 创建人
      ];
      ws['!cols'] = colWidths;
      
      // 生成文件名
      const now = new Date();
      const timestamp = now.getFullYear() + 
                       String(now.getMonth() + 1).padStart(2, '0') + 
                       String(now.getDate()).padStart(2, '0') + '_' +
                       String(now.getHours()).padStart(2, '0') + 
                       String(now.getMinutes()).padStart(2, '0');
      
      const filename = `采购需求清单_${currentProduct || '全部'}_${timestamp}.xlsx`;
      
      // 导出文件
      XLSX.writeFile(wb, filename);
      
      console.log(`成功导出 ${dataToExport.length} 条数据到 ${filename}`);
      
    } catch (err) {
      console.error('导出失败:', err);
      alert('导出失败，请稍后重试');
    }
  }
  
  function getStatusText(status) {
    const statusMap = {
      'pending': '待处理',
      'ordered': '已下单',
      'received': '已收货',
      'completed': '已完成',
      'cancelled': '已取消'
    };
    return statusMap[status] || status;
  }

  async function importExcel() {
    if (excelData.length === 0) {
      API.toast('没有可导入的数据', 'error');
      return;
    }
    
    // 获取产品编码
    const productCode = document.getElementById('import-product-code').value.trim();
    if (!productCode) {
      API.toast('请输入产品编码', 'error');
      return;
    }

    try {
      // 确保XLSX库已加载（虽然这里不需要，但为了保持一致性）
      await ensureXLSXLoaded();
      
      console.log('准备导入的数据:', excelData); // 调试日志
      console.log('产品编码:', productCode); // 调试日志
      
      const res = await API.post('/api/purchase-demand/import', {
        data: excelData,
        product_code: productCode
      });

      console.log('导入响应:', res); // 调试日志

      if (res.ok) {
        API.toast(`成功导入 ${res.count || excelData.length} 条数据`, 'success');
        if (res.errors && res.errors.length > 0) {
          console.log('导入错误:', res.errors);
        }
        closeImportModal();
        loadList(); // 重新加载列表
      } else {
        API.toast(res.error || '导入失败', 'error');
      }
    } catch (err) {
      console.error('导入失败:', err);
      API.toast('导入失败，请稍后重试', 'error');
    }
  }

  window.PurchaseDemand = {
    search,
    resetSearch,
    delete: deleteDemand,
    updateStatus,
    closeCalcModal,
    doCalculate,
    openImportModal,
    closeImportModal,
    handleFileSelect,
    importExcel,
    exportExcel,
    deleteProductData,
    edit,
    closeEditModal,
    saveEdit,
    openBatchEditStatusModal,
    closeBatchEditStatusModal,
    saveBatchEditStatus,
    syncToInitialStock,
    toggleSelectAll,
    switchProduct,
    goPage
  };
})();