/**
 * 提成奖金路由
 * 管理按月提成奖金/扣款的 CRUD、批量导入、模板下载
 */
import { Router, Response, NextFunction } from 'express'
import { authMiddleware, AuthRequest } from '../middleware/auth'
import multer from 'multer'
import * as XLSX from 'xlsx'
import {
  listByMonth,
  summaryByMonth,
  create,
  update,
  remove,
  batchImport,
} from '../services/commission-bonus.service'
import { auditLog } from '../middleware/auditLog'

const router = Router()
router.use(authMiddleware)

const upload = multer({ storage: multer.memoryStorage(), limits: { fileSize: 5 * 1024 * 1024 } })

/**
 * 按月查询提成奖金列表
 * GET /commission-bonus?month=YYYY-MM
 */
router.get('/', async (req: AuthRequest, res: Response, next: NextFunction) => {
  try {
    const orgId = req.user!.orgId
    const month = (req.query.month as string) || new Date().toISOString().slice(0, 7)
    const [records, summary] = await Promise.all([
      listByMonth(orgId, month),
      summaryByMonth(orgId, month),
    ])
    res.json({ success: true, data: { records, summary, month } })
  } catch (err) { next(err) }
})

/**
 * 新增单条提成奖金
 * POST /commission-bonus  body: { employeeId, month, amount, remark? }
 */
router.post('/', async (req: AuthRequest, res: Response, next: NextFunction) => {
  try {
    const orgId = req.user!.orgId
    const { employeeId, month, amount, remark } = req.body
    if (!employeeId || !month || amount === undefined) {
      return res.status(400).json({ success: false, error: { code: 'BAD_REQUEST', message: '缺少 employeeId/month/amount' } })
    }
    const record = await create(orgId, req.user!.id, { employeeId, month, amount: Number(amount), remark })
    await auditLog(req, 'CREATE', 'COMMISSION_BONUS', record.id, { employeeId, month, amount })
    res.json({ success: true, data: record })
  } catch (err: any) {
    if (err.code === 'NOT_FOUND') return res.status(404).json({ success: false, error: { code: err.code, message: err.message } })
    next(err)
  }
})

/**
 * 更新单条
 * PUT /commission-bonus/:id  body: { amount?, remark? }
 */
router.put('/:id', async (req: AuthRequest, res: Response, next: NextFunction) => {
  try {
    const orgId = req.user!.orgId
    const { amount, remark } = req.body
    const record = await update(orgId, req.params.id, { amount: amount !== undefined ? Number(amount) : undefined, remark })
    await auditLog(req, 'UPDATE', 'COMMISSION_BONUS', req.params.id, { amount, remark })
    res.json({ success: true, data: record })
  } catch (err: any) {
    if (err.code === 'NOT_FOUND') return res.status(404).json({ success: false, error: { code: err.code, message: err.message } })
    next(err)
  }
})

/**
 * 删除单条
 * DELETE /commission-bonus/:id
 */
router.delete('/:id', async (req: AuthRequest, res: Response, next: NextFunction) => {
  try {
    const orgId = req.user!.orgId
    await remove(orgId, req.params.id)
    await auditLog(req, 'DELETE', 'COMMISSION_BONUS', req.params.id)
    res.json({ success: true, data: { message: '已删除' } })
  } catch (err: any) {
    if (err.code === 'NOT_FOUND') return res.status(404).json({ success: false, error: { code: err.code, message: err.message } })
    next(err)
  }
})

/**
 * 批量导入 Excel
 * POST /commission-bonus/import  multipart: file, month
 * Excel 列：员工姓名 | 证件号码 | 金额 | 备注
 */
router.post('/import', upload.single('file'), async (req: AuthRequest, res: Response, next: NextFunction) => {
  try {
    const orgId = req.user!.orgId
    const month = req.body.month || new Date().toISOString().slice(0, 7)
    if (!req.file) {
      return res.status(400).json({ success: false, error: { code: 'BAD_REQUEST', message: '请上传 Excel 文件' } })
    }
    const wb = XLSX.read(req.file.buffer, { type: 'buffer' })
    const ws = wb.Sheets[wb.SheetNames[0]]
    const rows: any[] = XLSX.utils.sheet_to_json(ws, { defval: '' })

    const parsed = rows.map((r) => ({
      employeeName: String(r['员工姓名'] || r['姓名'] || '').trim() || undefined,
      idCardNumber: String(r['证件号码'] || r['身份证号'] || '').trim() || undefined,
      amount: parseFloat(r['金额'] || r['提成奖金'] || '0') || 0,
      remark: String(r['备注'] || '').trim() || undefined,
    })).filter((r) => r.employeeName || r.idCardNumber)

    const result = await batchImport(orgId, req.user!.id, month, parsed)
    await auditLog(req, 'IMPORT', 'COMMISSION_BONUS', undefined, { month, ...result })
    res.json({ success: true, data: result })
  } catch (err) { next(err) }
})

/**
 * 下载导入模板
 * GET /commission-bonus/template
 */
router.get('/template', (req: AuthRequest, res: Response) => {
  const ws = XLSX.utils.aoa_to_sheet([
    ['员工姓名', '证件号码', '金额', '备注'],
    ['张三', '110101199001011234', '5000', '销售提成'],
    ['李四', '', '-200', '迟到扣款'],
  ])
  const wb = XLSX.utils.book_new()
  XLSX.utils.book_append_sheet(wb, ws, '提成奖金模板')
  const buf = XLSX.write(wb, { type: 'buffer', bookType: 'xlsx' })
  res.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
  res.setHeader('Content-Disposition', 'attachment; filename="commission-bonus-template.xlsx"')
  res.send(buf)
})

export default router