'use strict';

const express = require('express');
const {
  getReplenishExportRows,
  getReplenishList,
} = require('../services/binReplenishService');
const { sendWorkbookDownload } = require('../services/exportWorkbook');

const router = express.Router();

const EXPORT_COLUMNS = [
  { key: 'skuId', title: '商品编码' },
  { key: 'productName', title: '品名' },
  { key: 'supplier', title: '供应商' },
  { key: 'statusLabel', title: '状态' },
  { key: 'pickQty', title: '拣货位库存' },
  { key: 'storageQty', title: '存储位库存' },
  { key: 'totalQty', title: '现有库存合计' },
  { key: 'orderQty', title: '待发订单' },
  { key: 'excess', title: '超出订单数' },
  { key: 'suggestQty', title: '建议补货量' },
  { key: 'shortfall', title: '存储缺口' },
];

/** GET /api/bin-replenish/list —— 缺货补货监控列表（订单驱动） */
router.get('/list', async (req, res, next) => {
  try {
    const payload = await getReplenishList({
      warehouse: req.query.warehouse,
      keyword: req.query.keyword,
      status: req.query.status,
      page: req.query.page,
      pageSize: req.query.pageSize,
      refresh: req.query.refresh,
    });
    res.json({ success: true, data: payload });
  } catch (error) {
    next(error);
  }
});

/** GET /api/bin-replenish/export —— 服务端全量导出 */
router.get('/export', async (req, res, next) => {
  try {
    const format = String(req.query.format || 'xlsx').toLowerCase() === 'csv' ? 'csv' : 'xlsx';
    const payload = await getReplenishExportRows({
      warehouse: req.query.warehouse,
      keyword: req.query.keyword,
      status: req.query.status,
    });
    const fileName = `${payload.warehouse.shortName}待补明细`;

    sendWorkbookDownload(res, {
      fileName,
      format,
      sheets: [{
        name: '缺货补货监控',
        header: EXPORT_COLUMNS.map((column) => column.title),
        rows: payload.rows.map((row) => EXPORT_COLUMNS.map((column) => row[column.key])),
      }],
    });
  } catch (error) {
    next(error);
  }
});

/** GET /api/bin-replenish/ping —— 路由存活探针（401 也代表已注册） */
router.get('/ping', (req, res) => {
  res.json({ success: true, data: { ok: true } });
});

module.exports = router;