'use strict';

const Service = require('egg').Service;

class RabbitmqService extends Service {

  constructor(ctx) {
    super(ctx);
    this.exType = 'topic';
    this.durable = true;
  }

  // 接收消息
  async receiveQueueMsg(ex) {
    this.ctx.logger.info('调用mq的' + ex);
    const self = this;
    const { mq } = self.ctx;
    if (mq) {
      const ch = await mq.conn.createChannel();
      await ch.assertExchange(ex, 'topic', { durable: true });
      const q = await ch.assertQueue('', { exclusive: true });
      await ch.bindQueue(q.queue, ex, '*');
      await ch.consume(q.queue, msg => this.logMessage(msg, this), { noAck: true });
    } else {
      this.ctx.logger.error('!!!!!!没有配置MQ插件!!!!!!');
    }
  }

  async logMessage(msg) {
    const result = msg.content.toString();
    const headers = msg.properties.headers;
  }

  // mission队列处理
  async mission() {
    const { mq } = this.ctx;
    if (mq) {
      const ch = await mq.conn.createChannel();
      const queue = 'mission/market';
      try {
        // 创建队列:在没有队列的情况,直接获取会导致程序无法启动
        await ch.assertQueue(queue, { durable: false });
        await ch.consume(queue, msg => this.dealMission(msg), { noAck: true });
      } catch (error) {
        this.ctx.logger.error('未找到订阅的队列');
      }
    } else {
      this.ctx.logger.error('!!!!!!没有配置MQ插件!!!!!!');
    }
  }
  // 执行任务
  async dealMission(bdata) {
    if (!bdata) this.ctx.logger.error('mission队列中信息不存在');
    let data = bdata.content.toString();
    try {
      data = JSON.parse(data);
    } catch (error) {
      this.ctx.logger.error('数据不是object');
    }
    const { service, method, ...others } = data;
    if (service && method) this.ctx.service[service][method](others);

  }
}

module.exports = RabbitmqService;