import { Notification } from 'element-ui';
import i18n from './lang/index.js';

/**
 * 通知管理器
 */
export default {
  // 初始化
  init (vue, sessionId) {
    this.vue = vue;
    this.url = `${process.env.VUE_APP_BASE_API}/wss`
    this.sessionId = sessionId;

    this.sock = undefined;
    this.stomp = undefined;
    this.privateHandler = undefined;
    this.publicHandler = undefined;

    this.isListener = false;

    this._connect();
  },

  // 设置sessionId
  setSessionId (sessionId) {
    this.sessionId = sessionId;
    this.subscribePrivate();
  },

  // 开始监听通知
  start () {
    this.isListener = true;
  },

  // 结束监听通知
  end () {
    // this._disconnect();
    this.isListener = false;
  },

  // 链接到sock服务器
  _connect () {
    if (this.sock || this.stomp) {
      return;
    }

    this.sock = new window.SockJS(this.url);
    this.stomp = window.Stomp.over(this.sock);

    // 建立连接监听
    this.stomp.connect(
      {},
      frame => {
        console.log('con');
        this.subscribePrivate();
        this.subscribePublic();
      },
      error => {
        console.log('error', error);
      }
    );
  },

  // 断开连接
  _disconnect () {
    this.stomp && this.stomp.disconnect();
    this.sock && this.sock.close();

    this.sock = undefined;
    this.stomp = undefined;
  },

  // 监听私有通知
  subscribePrivate () {
    if (this.privateHandler) {
      this.privateHandler.unsubscribe();
    }

    this.privateHandler =
      this.stomp &&
      this.stomp.subscribe(
        `/user/${this.sessionId || 'null'}/message`,
        response => {
          this.handleNotification(response);
        }
      );
  },

  // 监听公共通知
  subscribePublic () {
    if (this.publicHandler) {
      this.publicHandler.unsubscribe();
    }

    this.publicHandler =
      this.stomp &&
      this.stomp.subscribe('/topic', response => {
        this.handleNotification(response);
      });
  },

  // 全部的消息都在此处处理
  handleNotification (response) {
    if (!this.isListener) {
      return;
    }

    var h = this.vue.$createElement;
    var url = '/work/work';
    var desc = '';
    try {
      var body = JSON.parse(response.body);
      desc = body.msg || body.test || '';
    } catch (error) {
      console.error(error);
    }

    Notification({
      duration: 4500,
      type: 'warning',
      title: '任务',
      dangerouslyUseHTMLString: true,
      message: h(
        'div',
        { style: { width: '240px', height: '30px', display: 'flex' } },
        [
          h(
            'div',
            { style: { flex: 1, alignSelf: 'center', color: '#333' } },
            desc
          ),
          h('div', { style: { alignSelf: 'center' } }, [
            h(
              'el-link',
              {
                attrs: { type: 'info' },
                on: {
                  click: () => {
                    if (this.vue.$route.path === url) {
                      // 刷新当前路由
                      this.vue.$children[0].reload();
                    } else {
                      this.vue.$router.push(url);
                    }
                  }
                }
              },
              i18n.t('common.viewNow')
            )
          ])
        ]
      )
    });
  }
};