import JSEncrypt from 'jsencrypt'
import { resolveApiBase, AUTH_API } from '@/config/api'

function fetchLoginPublicKey() {
  const url = `${resolveApiBase()}${AUTH_API.LOGIN_RSA_PUBLIC_KEY}?_t=${Date.now()}`
  return new Promise((resolve, reject) => {
    uni.request({
      url,
      method: 'GET',
      success: (res) => resolve(res),
      fail: (err) => reject(err)
    })
  })
}

export async function buildMiniEncryptedLoginBody(username, password) {
  const keyRes = await fetchLoginPublicKey()
  const body = keyRes.data
  if (!body || body.code !== 200 || !body.data || !body.data.publicKeyPem) {
    throw new Error((body && body.message) || '获取登录公钥失败')
  }

  const crypt = new JSEncrypt()
  crypt.setPublicKey(body.data.publicKeyPem)
  const payload = JSON.stringify({
    username,
    password,
    ts: Date.now()
  })
  const encryptedLogin = crypt.encrypt(payload)
  if (!encryptedLogin) {
    throw new Error('登录加密失败，请重试')
  }
  return { encryptedLogin }
}