const Controller = require("egg").Controller

const wxmpConfig = {
  appid: "wx68ef6cfaa104652a",
  secret: "4dccf2429685eb8787b984d61ae69119"
}
const table = "sys_user"
/**
 * 微信小程序code转unionid
 * @param ctx
 * @returns {Promise<*>}
 */
const code2Openid = async ctx => {
  const result = await ctx.curl("https://api.weixin.qq.com/sns/jscode2session", {
    data: {
      ...wxmpConfig,
      js_code: ctx.query.code,         // 登录时获取的 code
      grant_type: 'authorization_code' // 授权类型，此处只需填写 authorization_code
    },
    dataType: "json"
  })
  return result.data?.openid
}

class WeixinMP extends Controller {
  async token() {
    const {ctx: {query}, app} = this
    if (!!query.code) {
      const wechatOpenId = await code2Openid(this.ctx)
      if (!wechatOpenId) return this.ctx.body = {code: 1, msg: "鉴权失败,无法获取openid"}
      const user = await app.mysql.get(table, {wechatOpenId})
      const {name, avatar} = query
      const result = await this.service.db.addOrUpdate(table, {name, avatar, wechatOpenId, id: user?.id})
      const token = app.jwt.sign({id: result.data?.id}, app.config.jwt.secret)
      this.ctx.body = {code: 0, data: "bearer " + token}
    } else this.ctx.body = {code: 1, msg: "缺少必要参数(code)"}
    this.ctx.status = 200
  }
}

module.exports = WeixinMP