const nodemailer = require('nodemailer')

//创建一个SMTP客户端配置对象
const transporter = nodemailer.createTransport({
    // 默认支持的邮箱服务包括：”QQ”、”163”、”126”、”iCloud”、”Hotmail”、”Yahoo”等
    service: "QQ",
    auth: {
        // 发件人邮箱账号
        user: '***@qq.com',
        //发件人邮箱的授权码 需要在自己的邮箱设置中生成,并不是邮件的登录密码
        pass: '***'
    }
})
const sendEmail=(toUserEmail,title,content)=>{
    return new Promise(resolve=>{
        // 配置收件人信息
        const receiver = {
            // 发件人 邮箱  '昵称<发件人邮箱>'
            from: `***@qq.com`,
            // 主题
            subject:title,
            // 收件人 的邮箱 可以是其他邮箱 不一定是qq邮箱
            to:toUserEmail,
            // 可以使用html标签
            html: content
        };

        // 发送邮件
        transporter.sendMail(receiver, (error, info) => {
            if (error) {
                resolve({
                    code:0,
                    msg:error
                })
            }
            transporter.close()
            resolve({
                code:200,
                msg:'success'
            })
        })
    })
};
module.exports={
    sendEmail
}

npm install ioredis

// Import ioredis.
// You can also use `import { Redis } from "ioredis"`
// if your project is a TypeScript project,
// Note that `import Redis from "ioredis"` is still supported,
// but will be deprecated in the next major version.
const Redis = require("ioredis");

// Create a Redis instance.
// By default, it will connect to localhost:6379.
// We are going to cover how to specify connection options soon.
const redis = new Redis();

redis.set("mykey", "value"); // Returns a promise which resolves to "OK" when the command succeeds.

// ioredis supports the node.js callback style
redis.get("mykey", (err, result) => {
  if (err) {
    console.error(err);
  } else {
    console.log(result); // Prints "value"
  }
});

// Or ioredis returns a promise if the last argument isn't a function
redis.get("mykey").then((result) => {
  console.log(result); // Prints "value"
});

redis.zadd("sortedSet", 1, "one", 2, "dos", 4, "quatro", 3, "three");
redis.zrange("sortedSet", 0, 2, "WITHSCORES").then((elements) => {
  // ["one", "1", "dos", "2", "three", "3"] as if the command was `redis> ZRANGE sortedSet 0 2 WITHSCORES`
  console.log(elements);
});

// All arguments are passed directly to the redis server,
// so technically ioredis supports all Redis commands.
// The format is: redis[SOME_REDIS_COMMAND_IN_LOWERCASE](ARGUMENTS_ARE_JOINED_INTO_COMMAND_STRING)
// so the following statement is equivalent to the CLI: `redis> SET mykey hello EX 10`
redis.set("mykey", "hello", "EX", 10);

const Redis = require('ioredis')

// 创建 Redis 客户端实例, 连接指定的 Redis 服务器
const redis = new Redis({
  port: 6379, // redis服务器默认端口号
  host: '127.0.0.1' // redis服务器的IP地址
})

const Router = require('koa-router');
const router = new Router();
const {sendEmail}=require('../../utils/email/index');
const {getRedisKey,setRedisConfig}=require('../../utils/redis/index');

// 随机字符串
function randomString(length) {
    const chars='0123456789'
    let result = '';
    for (let i = length; i > 0; --i) result += chars[Math.floor(Math.random() * chars.length)];
    return result;
}



// 发送邮件验证码
router.post('/getEmailCode', async (ctx) => {
    try{
        const bodyParams =  ctx.request.body
        const {email}=bodyParams
        const code=randomString(4)
        const content=`<p>验证码：<span style="color:lightskyblue">${code}</span><p>`
        const title='欢迎注册！'
        setRedisConfig(email,code)
        const res=await sendEmail(email,title,content)
        ctx.body = {
            code:res.code,
            data:{
                emailRes:res,
                code:await getRedisKey(email)
            },
            msg:'success'
        };
    }
    catch(r){
        ctx.body={
            code:0,
            msg:r
        }
    }
});

module.exports = router;