/* eslint-disable no-mixed-spaces-and-tabs */
'use strict';

const _ = require('lodash');
const Service = require('egg').Service;
const amqp = require('amqplib');

class RabbitmqnewService extends Service {
  constructor(ctx) {
    super(ctx);

    this.hosts = [{
      hostname: '127.0.0.1',
      port: '5672',
      username: 'wy',
      password: '1',
      authMechanism: 'AMQPLAIN',
      pathname: '/',
      ssl: {
        enabled: false,
      },
    }];
    this.index = 0;
    this.exType = 'topic';
    this.durable = true;
    this.autoDelete = true;
  }

  // 发送消息
  async sendQueueMsg(queueName, routeKey, msg) {
    const self = this;
    const conn = await amqp.connect(self.hosts[self.index]);
    const ch = await conn.createConfirmChannel();
    try {
      await ch.assertExchange(queueName, this.exType, { durable: this.durable });
      const result = await ch.publish(queueName, routeKey, Buffer.from(msg), {
        persistent: true, // 消息持久化
        mandatory: true,
      });
      console.log('==result==', result);
      if (result) {
        console.log('发送成功');
      } else {
        console.log('发送失败');
      }
      await ch.close();
    } catch (e) {
      console.log('==e==', e);
      await ch.close();
    }
  }

  // 接收消息
  async receiveQueueMsg(queueName, routeKey, receiveCallBack) {
    const self = this;
    const conn = await amqp.connect(self.hosts[self.index]);
    const ch = await conn.createConfirmChannel();
    try {
      await ch.assertExchange(queueName, this.exType, { durable: this.durable });
      const q = await ch.assertQueue('', { exclusive: false });
      console.log('==q=', q);
      // 队列绑定 exchange
      await ch.bindQueue(q.queue, queueName, routeKey);
      await ch.consume(q.queue, msg => {
        console.log('收到消息: ', msg);
        const data = msg.content.toString();
        // 发送确认消息
        ch.ack(msg);
        receiveCallBack && receiveCallBack(data);
      }, { noAck: false });
    } catch (e) {
      console.log('==e==', e);
      await ch.close();
    }
  }

}

module.exports = RabbitmqnewService;