import mysql from 'mysql2/promise'
import fs from 'fs'

export async function update(list, field) {
  const { mysql: config } = JSON.parse(fs.readFileSync('config.json', 'utf8'))
  const conn = await mysql.createConnection(config)

  await conn.query(`CREATE TEMPORARY TABLE temp_updates (id INT PRIMARY KEY, ${field} INT)`)

  for (let i = 0; i < list.length; i += 10000) {
    const values = list.slice(i, i + 10000).map(({ id, ...rest }) => [id, rest[field]])
    await conn.query(`INSERT INTO temp_updates (id, ${field}) VALUES ?`, [values])
  }

  await conn.query(`UPDATE web_images t JOIN temp_updates tu ON t.id = tu.id SET t.${field} = tu.${field}`)
  console.log('更新完成')
  await conn.end()
}