import cron from 'node-cron'
import { prisma } from './db.js'
import mysql from 'mysql2/promise'
import { fetchNewsList, persistNews } from '../scripts/fetchers/news.fetcher.js'
import { checkAfterRefresh } from './alert-engine.js'

function parseUrl(url) {
  const u = new URL(url)
  return { host: u.hostname, port: Number(u.port) || 3306, user: decodeURIComponent(u.username), password: decodeURIComponent(u.password), database: u.pathname.replace(/^\//, '') }
}

async function openConn() {
  return mysql.createConnection(parseUrl(process.env.DATABASE_URL))
}

// 每天凌晨 3:00 (本地时间) 拉取新闻 + 跑跨源对比
function scheduleNews() {
  cron.schedule('0 3 * * *', async () => {
    console.log('[cron] 3:00 触发')
    try {
      const list = await fetchNewsList()
      const r = await persistNews(list)
      console.log('[cron] 新闻入库: 新增 ' + r.inserted + ' / 跳过 ' + r.skipped)
      const conn = await openConn()
      try {
        const a = await checkAfterRefresh(conn)
        console.log('[cron] 报警检测: 新增 ' + a.inserted + ' 条 (扫描 ' + a.scanned + ')')
      } finally { await conn.end() }
    } catch (e) {
      console.error('[cron] 任务失败:', e.message)
    }
  })
  console.log('[cron] 已注册: 每天 03:00 拉取新闻 + 跨源报警检测')
}

scheduleNews()