import express from 'express'
import { searchSubstances, getSubstanceById } from './hnsService.js'
import { isValidNumber } from '../middleware/security.js'

const router = express.Router()

// HNS 물질 검색
router.get('/', async (req, res) => {
  try {
    const q = req.query.q as string | undefined
    const type = req.query.type as string | undefined
    const sebc = req.query.sebc as string | undefined
    const page = parseInt(req.query.page as string, 10) || 1
    const limit = parseInt(req.query.limit as string, 10) || 50

    if (!isValidNumber(page, 1, 10000) || !isValidNumber(limit, 1, 100)) {
      return res.status(400).json({
        error: '유효하지 않은 페이지네이션',
        message: 'page는 1~10000, limit은 1~100 범위여야 합니다.',
      })
    }

    const validTypes = ['abbreviation', 'nameKr', 'nameEn', 'casNumber', 'unNumber', 'cargoCode']
    const searchType = type && validTypes.includes(type)
      ? type as 'abbreviation' | 'nameKr' | 'nameEn' | 'casNumber' | 'unNumber' | 'cargoCode'
      : undefined

    const result = await searchSubstances({ q, type: searchType, sebc, page, limit })
    res.json(result)
  } catch {
    res.status(500).json({ error: 'HNS 물질 검색 실패' })
  }
})

// HNS 물질 상세 조회
router.get('/:id', async (req, res) => {
  try {
    const id = parseInt(req.params.id, 10)
    if (!isValidNumber(id, 1, 999999)) {
      return res.status(400).json({ error: '유효하지 않은 물질 ID' })
    }

    const substance = await getSubstanceById(id)
    if (!substance) {
      return res.status(404).json({ error: '물질을 찾을 수 없습니다' })
    }
    res.json(substance)
  } catch {
    res.status(500).json({ error: 'HNS 물질 조회 실패' })
  }
})

export default router