/**用户操作行为轨迹（统一采集触发元素点击事件） */

import { innertEvent } from './utils'

class Behavior {
  private lastTrackTime: number = 0
  constructor() {
    this.recordBehavior();
  }

  sendBehavior(tagName: string, innerText: string) {
    innertEvent.trigger('behavior', {
      behaviorType: 'click',
      tagName: tagName,
      innerText: innerText
    });
  }

  recordBehavior() {
    if(!window.addEventListener) return;
    // click监听
    window.addEventListener('click', (e: Event) => {
      const ev = e || window.event;
      if (!ev) {
        return false;
      }
      const target: any = ev.target || ev.srcElement;
      if (!target) {
        return false;
      }
      if(typeof target !== 'object') {
        return false;
      }
      if(typeof target.tagName !== 'string') {
        return false;
      }
      const tagName = target.tagName.toLowerCase();
      if (['body', 'html'].indexOf(tagName) > -1) {
        return false;
      }
      if(!target.parentNode || !target.parentNode.children){
        return false;
      }
      let textContent = '';
      if (target.textContent) {
        textContent = target.textContent.trim();
      }else if(target.innerText){
        textContent = target.innerText.trim();
      }
      if (textContent) {
        textContent = textContent.replace(/[\r\n]/g, ' ').replace(/[ ]+/g, ' ').substring(0, 120);
      }
      const curTime = new Date().getTime();
      if ((curTime - this.lastTrackTime)/1000 >= 0.5) {
        // 与上次触发事件相隔0.5秒以上可以再次发送
        this.lastTrackTime = curTime - 0;
        this.sendBehavior(tagName, textContent)
      }
    });
  }
}

export default Behavior