import { Request, Response } from 'express'
import pool from '../utils/db'
import { RowDataPacket, ResultSetHeader } from 'mysql2'

// GET /api/admin/molds - 管理后台版房列表
export async function adminGetMolds(req: Request, res: Response): Promise<void> {
  try {
    const page = Math.max(1, Number(req.query.page) || 1)
    const pageSize = Math.min(50, Math.max(1, Number(req.query.pageSize) || 10))
    const keyword = req.query.keyword as string | undefined
    const offset = (page - 1) * pageSize

    let where = ''
    const params: any[] = []

    if (keyword && keyword.trim()) {
      const kw = `%${keyword.trim()}%`
      where = 'WHERE name LIKE ? OR style_no LIKE ? OR barcode_no LIKE ? OR style LIKE ?'
      params.push(kw, kw, kw, kw)
    }

    const [countRows] = await pool.execute<RowDataPacket[]>(
      `SELECT COUNT(*) as total FROM mold_infos ${where}`,
      params
    )
    const total = countRows[0].total

    const [rows] = await pool.execute<RowDataPacket[]>(
      `SELECT id, name, style_no, barcode_no, style, images, created_at, updated_at
       FROM mold_infos ${where}
       ORDER BY id DESC LIMIT ? OFFSET ?`,
      [...params, String(pageSize), String(offset)]
    )

    res.json({ code: 0, data: { list: rows, total, page, pageSize } })
  } catch (err) {
    console.error('adminGetMolds error:', err)
    res.status(500).json({ code: 500, message: '获取版房列表失败' })
  }
}

// POST /api/admin/molds - 创建版房信息
export async function adminCreateMold(req: Request, res: Response): Promise<void> {
  try {
    const { name, styleNo, barcodeNo, style, images } = req.body

    if (!name) {
      res.status(400).json({ code: 400, message: '版房名称不能为空' })
      return
    }

    const [result] = await pool.execute<ResultSetHeader>(
      'INSERT INTO mold_infos (name, style_no, barcode_no, style, images) VALUES (?, ?, ?, ?, ?)',
      [name, styleNo || null, barcodeNo || null, style || null, JSON.stringify(images || [])]
    )

    res.json({ code: 0, data: { id: result.insertId } })
  } catch (err) {
    console.error('adminCreateMold error:', err)
    res.status(500).json({ code: 500, message: '创建版房信息失败' })
  }
}

// PUT /api/admin/molds/:id - 编辑版房信息
export async function adminUpdateMold(req: Request, res: Response): Promise<void> {
  try {
    const { id } = req.params
    const { name, styleNo, barcodeNo, style, images } = req.body

    const [existing] = await pool.execute<RowDataPacket[]>(
      'SELECT id FROM mold_infos WHERE id = ?',
      [id]
    )
    if (existing.length === 0) {
      res.status(404).json({ code: 404, message: '版房信息不存在' })
      return
    }

    await pool.execute(
      'UPDATE mold_infos SET name=?, style_no=?, barcode_no=?, style=?, images=? WHERE id=?',
      [name, styleNo || null, barcodeNo || null, style || null, JSON.stringify(images || []), id]
    )

    res.json({ code: 0, message: '更新成功' })
  } catch (err) {
    console.error('adminUpdateMold error:', err)
    res.status(500).json({ code: 500, message: '更新版房信息失败' })
  }
}

// DELETE /api/admin/molds/:id - 删除版房信息
export async function adminDeleteMold(req: Request, res: Response): Promise<void> {
  try {
    const { id } = req.params
    await pool.execute('DELETE FROM mold_infos WHERE id = ?', [id])
    res.json({ code: 0, message: '删除成功' })
  } catch (err) {
    console.error('adminDeleteMold error:', err)
    res.status(500).json({ code: 500, message: '删除版房信息失败' })
  }
}